1,160 results match your criteria Japanese journal of radiology[Journal]


Detectability of the choroid plexus of the third ventricle with magnetic resonance ventriculography.

Jpn J Radiol 2019 Apr 23. Epub 2019 Apr 23.

Department of Radiology and Radiation Oncology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimati-dori, Chuo-ku, Niigata-shi, Niigata, 951-8510, Japan.

Purpose: To clarify the detectability of the choroid plexus of the third ventricle (ChPl3V) with magnetic resonance ventriculography (MRVn) employing a steady-state free precession (SSFP) sequence in comparison to surgical endoscopic movies as a golden standard, as we encountered some clinical cases of total agenesis of corpus callosum (ACC) where we could not recognize the choroid plexus of the third ventricle and found no previous article addressing this problem.

Materials And Methods: This retrospective study included consecutive patients from 2010 to 2016 for whom endoscopic evaluation of the third ventricle was conducted. The anterior portion of the right and left streaks of ChPl3V was evaluated in 8 patients on 16 sites, while the posterior portion of both streaks of ChPl3V was evaluated in 13 patients on 26 sites. Read More

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http://dx.doi.org/10.1007/s11604-019-00834-2DOI Listing

MR enterography: what is next after Crohn's disease?

Jpn J Radiol 2019 Apr 9. Epub 2019 Apr 9.

Section of Radiological Sciences, Department of Biomedical Sciences and Morphological and Functional Imaging, University of Messina, Policlinico "G. Martino" Via Consolare Valeria 1, 98100, Messina, Italy.

Within the gastrointestinal system, the small bowel represents the most difficult site to approach with imaging modalities. During the last decades, magnetic resonance enterography has reached an increasing interest, up to be considered an essential part in the diagnostic framework of Crohn's disease patients. Nevertheless, the distention of the intestinal loops provided by the administration of oral contrast medium, the possibility of a dynamic evaluation, and the lack of radiation exposure are huge advantages that can be exploited for the assessment of other clinical conditions affecting the small bowel. Read More

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http://dx.doi.org/10.1007/s11604-019-00838-yDOI Listing

CT findings in diagnosis of gastric bare area invasion: potential prognostic factors for proximal gastric carcinoma.

Jpn J Radiol 2019 Apr 3. Epub 2019 Apr 3.

From Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Radiology, Peking University Cancer Hospital and Institute, No. 52 Fu Cheng Road, Hai Dian District, Beijing, 100142, China.

Purpose: To investigate the correlation between the preoperative CT findings in diagnosis of gastric bare area (GBA) invasion and the 3-year-overall survival (OS) of patients with proximal gastric carcinoma (PGC).

Methods: 108 consecutive patients with PGC confirmed by biopsy underwent MDCT scan prior to gastrectomy were enrolled retrospectively from Dec 2009 to Dec 2014. GBA invasion in PGC were evaluated by measuring the direct CT signs including transmural involvement and lymph nodes in the GBA. Read More

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http://dx.doi.org/10.1007/s11604-019-00837-zDOI Listing
April 2019
1 Read

Cryoablation of renal cell carcinoma for patients with stage 4 or 5 non-dialysis chronic kidney disease.

Jpn J Radiol 2019 Apr 2. Epub 2019 Apr 2.

Department of Radiology, The Hospital of Hyogo College of Medicine, Nishinomiya, Japan.

Purpose: To evaluate the safety and efficacy of cryoablation for renal cell carcinoma (RCC) in patients with stage 4 or 5 non-dialysis chronic kidney disease (CKD).

Materials And Methods: This retrospective multicenter study included patients with maximum tumor diameter ≤ 4 cm, estimated glomerular filtration rate (eGFR) < 30 ml/min/1.73 m, in whom cryoablation was performed percutaneously with curative intent between July 2011 and May 2016. Read More

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http://link.springer.com/10.1007/s11604-019-00821-7
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http://dx.doi.org/10.1007/s11604-019-00821-7DOI Listing
April 2019
5 Reads

Changes in tissue gadolinium biodistribution measured in an animal model exposed to four chelating agents.

Jpn J Radiol 2019 Mar 30. Epub 2019 Mar 30.

Department of Radiology, University of Ottawa Faculty of Medicine and The Ottawa Hospital Research Institute, 451 Smyth Road, Ottawa, ON, Canada.

Purpose: This study investigated the potential to reduce gadolinium levels in rodents after repetitive IV Gadodiamide administration using several chelating agents.

Materials And Methods: The following six groups of rats were studied. Group 1: Control; Group 2: Gadodiamide only; Group 3: Meso-2,3-Dimercaptosuccinic acid (DMSA) + Gadodiamide; Group 4: N-Acetyl-L-cysteine (NAC) + Gadodiamide; Group 5: Coriandrum sativum extract + Gadodiamide; and Group 6: Deferoxamine + Gadodiamide. Read More

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http://dx.doi.org/10.1007/s11604-019-00835-1DOI Listing
March 2019
1 Read

Change in hepatic hemodynamics assessed by hepatic arterial blood pressure and computed tomography during hepatic angiography with the double balloon technique.

Jpn J Radiol 2019 Mar 29. Epub 2019 Mar 29.

Department of Radiology, Shiga Universitiy of Medical Science, Seta Tsukinowa-cho, Otsu-city, 520-2192, Shiga, Japan.

Purpose: To assess the change in hepatic arterial blood pressure (HABP) and computed tomography during hepatic arteriography (CTHA) using the double balloon technique.

Materials And Methods: Nine patients with hepatocellular carcinoma (HCC) were enrolled. We inserted a 5. Read More

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http://dx.doi.org/10.1007/s11604-019-00836-0DOI Listing

Radiation with concomitant superselective intra-arterial cisplatin infusion for maxillary sinus squamous cell carcinoma.

Jpn J Radiol 2019 Mar 26. Epub 2019 Mar 26.

Department of Radiation Oncology, Tsukuba University Hospital, Tsukuba, Ibaraki, Japan.

Purpose: To assess the efficacy and prognostic factors after superselective intra-arterial chemoradiation (RADPLAT) for maxillary sinus squamous cell carcinoma (MS-SCC).

Materials And Methods: Prognostic significance of age, gender, T and N factors, gross tumor volume of the primary-site (GTV), total cisplatin dosage, and total cisplatin dosage per GTV (CDDP/GTV) for primary-site recurrence-free survival rate (PRFS) were analyzed. RADPLAT was administered to 27 patients. Read More

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http://link.springer.com/10.1007/s11604-019-00827-1
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http://dx.doi.org/10.1007/s11604-019-00827-1DOI Listing
March 2019
3 Reads

The day when computers read between lines.

Jpn J Radiol 2019 Mar 25. Epub 2019 Mar 25.

Kennedy Krieger Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

There is a growing notion that artificial general intelligence (AGI) will replace some of the work done by trained professionals, including physicians. This idea, however, seems to have logical leap; herein, we discuss three problems that are significant barriers to this. First, the ground truth is difficult to provide in the majority of medical conditions. Read More

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http://link.springer.com/10.1007/s11604-019-00833-3
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http://dx.doi.org/10.1007/s11604-019-00833-3DOI Listing
March 2019
5 Reads

Imaging of extracranial head and neck lesions in cancer patients: a symptom-based approach.

Jpn J Radiol 2019 Mar 25. Epub 2019 Mar 25.

Department of Diagnostic Radiology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.

Besides intracranial lesions, neurological symptoms are also caused in cancer patients by extracranial lesions in the head and neck. Common symptoms caused by such lesions include visual loss, visual field defect, diplopia, ptosis, sensory abnormalities of the head and neck region, facial nerve palsy, dysphagia, dysarthria, hoarseness, and syncope. Some cancer patients often have multiple cranial nerve involvement, which is associated with several syndromes such as jugular foramen syndrome. Read More

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http://dx.doi.org/10.1007/s11604-019-00832-4DOI Listing
March 2019
2 Reads

Monitoring of fatigue in radiologists during prolonged image interpretation using fNIRS.

Jpn J Radiol 2019 Mar 19. Epub 2019 Mar 19.

Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.

Purpose: To determine whether functional near-infrared spectroscopy (fNIRS) allows monitoring fatigue in radiologists during prolonged image interpretation.

Materials And Methods: Nine radiologists participated as subjects in the present study and continuously interpreted medical images and generated reports for cases for more than 4 h under real clinical work conditions. We measured changes in oxygenated hemoglobin concentrations [oxy-Hb] in the prefrontal cortex using 16-channel fNIRS (OEG16ME, Spectratech) every hour during the Stroop task to evaluate fatigue of radiologists and recorded fatigue scale (FS) as a behavior data. Read More

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http://dx.doi.org/10.1007/s11604-019-00826-2DOI Listing

Distinction between benign and malignant breast masses at breast ultrasound using deep learning method with convolutional neural network.

Jpn J Radiol 2019 Mar 19. Epub 2019 Mar 19.

Department of Radiology, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.

Purpose: We aimed to use deep learning with convolutional neural network (CNN) to discriminate between benign and malignant breast mass images from ultrasound.

Materials And Methods: We retrospectively gathered 480 images of 96 benign masses and 467 images of 144 malignant masses for training data. Deep learning model was constructed using CNN architecture GoogLeNet and analyzed test data: 48 benign masses, 72 malignant masses. Read More

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http://dx.doi.org/10.1007/s11604-019-00831-5DOI Listing
March 2019
7 Reads

Imaging findings of mixed connective tissue disease in children and adolescents: a case series.

Jpn J Radiol 2019 Mar 14. Epub 2019 Mar 14.

Department of Rheumatology, The Hospital for Sick Children, Department of Medical Imaging, University of Toronto, Toronto, ON, Canada.

Mixed connective tissue disease (MCTD) is a rare disease in children and adolescents which overlaps features of juvenile idiopathic arthritis, polymyositis/dermatomyositis, systemic lupus erythematosus, and systemic sclerosis. We have provided an image-based approach for evaluation of MCTD in children and adolescents, outlying the most frequent imaging findings. This approach would aid imagers and clinicians to consider the diagnosis of this rare entity and be able to make an accurate list of differential diagnosis for complex rheumatologic diseases such as MCTD, thus facilitating the ultimate goal of early diagnosis and optimal management of affected children. Read More

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http://dx.doi.org/10.1007/s11604-019-00824-4DOI Listing
March 2019
1 Read

Ethanol fixation method for heart and lung imaging in micro-CT.

Jpn J Radiol 2019 Mar 14. Epub 2019 Mar 14.

Specialized Laboratory of Experimental Imaging, Third Faculty of Medicine, Charles University, Prague, Czech Republic.

Purpose: The soft tissue imaging in micro-CT remains challenging due to its low intrinsic contrast. The aim of this study was to create a simple staining method omitting the usage of contrast agents for ex vivo soft tissue imaging in micro-CT.

Materials And Methods: Hearts and lungs from 30 mice were used. Read More

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http://dx.doi.org/10.1007/s11604-019-00830-6DOI Listing

Increased signal intensity of low-concentration gadolinium contrast agent by longer repetition time in heavily T-weighted-3D-FLAIR.

Jpn J Radiol 2019 Mar 12. Epub 2019 Mar 12.

Department of Radiology, Graduate School of Medicine, Nagoya University, Nagoya, Aichi, 466-8550, Japan.

Purpose: To apply for detecting low-concentration gadolinium contrast agent (Gd), such as those in the perilymph and cerebrospinal fluid (CSF) at 4 h after intravenous administrations (IV), we tried to clarify the degree of increased signal intensity (SI) of low-concentration Gd by longer repetition time (TR) in heavily T-weighed 3D-FLAIR.

Materials And Methods: A phantom was designed using Gd diluted with saline at 0.250-0. Read More

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http://dx.doi.org/10.1007/s11604-019-00828-0DOI Listing

CT features of parathyroid carcinomas: comparison with benign parathyroid lesions.

Jpn J Radiol 2019 Mar 12. Epub 2019 Mar 12.

Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima City, 890-8544, Japan.

Purpose: To describe CT features of parathyroid carcinomas (PCs) by comparison with benign parathyroid lesions (BPs).

Methods: This retrospective study comprised 82 patients with 76 BPs (62 adenomas and 14 hyperplastic lesions) and 6 PCs. CT features (size, short-to-long axis ratio, shape, peritumoral infiltration, homogeneity, calcification, attenuation values on unenhanced CT, and contrast enhancement during arterial and venous phases) were compared between PCs and BPs. Read More

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http://dx.doi.org/10.1007/s11604-019-00825-3DOI Listing
March 2019
1 Read

T2*-weighted MR imaging findings of giant cell tumors of bone: radiological-pathological correlation.

Jpn J Radiol 2019 Mar 11. Epub 2019 Mar 11.

Department of Radiology, Gifu University School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan.

Purpose: To assess the correlation between T2*-weighted MR imaging and pathological findings of giant cell tumors (GCT) of bone.

Methods: Of the 33 patients with histopathologically proven GCT of bone, 12 were examined using 1.5-T MR imaging, including T2*-weighted imaging, and were included in this study. Read More

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http://dx.doi.org/10.1007/s11604-019-00829-zDOI Listing

Airway quantification using adaptive statistical iterative reconstruction-V on wide-detector low-dose CT: a validation study on lung specimen.

Jpn J Radiol 2019 Feb 28. Epub 2019 Feb 28.

Department of Radiology, Shanghai General Hospital of Nanjing Medical University, No. 100 Haining Road, Shanghai, 200080, People's Republic of China.

Purpose: To evaluate the accuracy of airway quantification of adaptive statistical iterative reconstruction (ASIR)-V on low-dose CT using a human lung specimen.

Method: A lung specimen was scanned on Revolution CT with low-dose settings (20 mAs, 40 mAs and 60 mAs/100 kV) and standard-dose setting (100 mAs/120 kV). CT images were reconstructed using lung kernel with eleven ASIR-V levels from 0 to 100% with 10% interval. Read More

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http://dx.doi.org/10.1007/s11604-019-00818-2DOI Listing
February 2019
1 Read

Effects of acquisition method and reconstruction algorithm for CT number measurement on standard-dose CT and reduced-dose CT: a QIBA phantom study.

Jpn J Radiol 2019 Feb 25. Epub 2019 Feb 25.

Division of Functional and Diagnostic Imaging Research, Department of Radiology, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan.

Purpose: To compare the effect of different acquisition and reconstruction methods on the radiation dose and accuracy of CT number measurements, using a 320-detector row CT and a Quantitative Imaging Biomarker Alliance (QIBA) recommended phantom.

Materials And Methods: Acquisitions were performed on a 320-detector row CT, as 64- and 80-detector row helical and wide detector step-and-shoot (i.e. Read More

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http://dx.doi.org/10.1007/s11604-019-00823-5DOI Listing
February 2019
3 Reads

Liver assessment using Gd-EOB-DTPA-enhanced magnetic resonance imaging in primary biliary cholangitis patients.

Jpn J Radiol 2019 Feb 23. Epub 2019 Feb 23.

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Xicheng District, Beijing, 100050, China.

Purpose: To evaluate the feasibility of utilizing gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) for the assessment of Child-Pugh class and for differentiating between patients with primary biliary cholangitis (PBC) and posthepatitic cirrhosis.

Materials And Methods: 45 PBC patients and 45 posthepatitic cirrhosis patients were enrolled and Gd-EOB-DTPA-enhanced MRI was applied. The average relative signal enhancement (RE) of the liver and average contrast to noise ratio (CNR) of common bile duct at 4, 20, and 50 min between different Child-Pugh classes of PBC patients were compared. Read More

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http://dx.doi.org/10.1007/s11604-019-00822-6DOI Listing
February 2019
1 Read

A heart atlas for breast radiation therapy and the influence of delination education on both intra and interobserver variability.

Jpn J Radiol 2019 Feb 18. Epub 2019 Feb 18.

Departmant of Radiation Oncology, Dokuz Eylül University Faculty of Medicine, Mithatpaşa Street, Balçova, 35340, İzmir, Turkey.

Purpose: We developed a heart atlas for breast radiation therapy and evaluated the influence of education on intra and inter-observer similarity, and cardiac dose reporting.

Materials And Methods: The data of 16 left breast cancer patients were analyzed. Eight observers delineated heart and cardiac subunits [left (LCA) and right (RCA) coronary arteries, left anterior descending artery (LAD), bilateral atrium and ventricles] before the education. Read More

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http://dx.doi.org/10.1007/s11604-019-00819-1DOI Listing
February 2019

Current status of imaging biomarkers predicting the biological nature of hepatocellular carcinoma.

Jpn J Radiol 2019 Mar 2;37(3):191-208. Epub 2019 Feb 2.

Department of Radiology, Kanazawa University Graduate School of Medical Sciences, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8640, Japan.

Hepatocellular carcinoma (HCC) is heterogeneous in terms of its biological nature. Various factors related to its biological nature, including size, multifocality, macroscopic morphology, grade of differentiation, macro/microvascular invasion, bile duct invasion, intra-tumoral fat and molecular factors, and their value as prognostic imaging biomarkers have been reported. And recently, genome-based molecular HCC classification correlated with clinical outcome has been elucidated. Read More

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http://dx.doi.org/10.1007/s11604-019-00817-3DOI Listing
March 2019
1 Read

Thoracic endovascular aortic repair for the treatment of ruptured acute type B aortic dissection.

Jpn J Radiol 2019 Apr 2;37(4):321-327. Epub 2019 Feb 2.

Department of Radiology, Mie University Hospital, 2-174 Edobashi, Tsu, Mie, 514-8507, Japan.

Purpose: To evaluate the efficacy of thoracic endovascular aortic repair (TEVAR) for ruptured acute type B aortic dissection (r-ATBAD).

Materials And Methods: The study included 18 patients (15 men and 3 women) who underwent TEVAR for r-ATBAD in two institutions between 1997 and 2017. The mean patient age was 74 ± 10 years. Read More

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http://link.springer.com/10.1007/s11604-019-00813-7
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http://dx.doi.org/10.1007/s11604-019-00813-7DOI Listing
April 2019
9 Reads

Initial clinical experience of a prototype ultra-high-resolution CT for assessment of small intracranial arteries.

Jpn J Radiol 2019 Apr 31;37(4):283-291. Epub 2019 Jan 31.

Department of Radiology, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1101, Japan.

Purpose: Diagnostic and neurosurgical procedures require the precise localization of small intracranial arteries, but this may be difficult using conventional computed tomography angiography (CTA). This study was conducted to evaluate the quality of CTA images acquired using a prototype ultra-high-resolution computed tomography (U-HRCT) system compared with those acquired using a conventional computed tomography (C-CT) system.

Materials And Methods: From July through September 2015, 10 adult patients (6 women and 4 men) previously scanned by C-CT were examined using U-HRCT to locate and assess cerebral aneurysms. Read More

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http://dx.doi.org/10.1007/s11604-019-00816-4DOI Listing

Recent technical development of artificial intelligence for diagnostic medical imaging.

Authors:
Norio Nakata

Jpn J Radiol 2019 Feb 31;37(2):103-108. Epub 2019 Jan 31.

Department of Radiology, The Jikei University, School of Medicine, 3-25-8, Nishi-shimbashi, Minato-ku, Tokyo, 1058461, Japan.

Deep learning has caused a third boom of artificial intelligence and great changes of diagnostic medical imaging systems such as radiology, pathology, retinal imaging, dermatology inspection, and endoscopic diagnosis will be expected in the near future. However, various attempts and new methods of deep learning have been proposed in recent years, and their progress is extremely fast. Therefore, at the initial stage when medical artificial intelligence papers were published, the artificial intelligence technology itself may be old technology or well-known general-purpose common technology. Read More

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http://dx.doi.org/10.1007/s11604-018-0804-6DOI Listing
February 2019

The utility of transarterial embolization and computed tomography for life-threatening spontaneous retroperitoneal hemorrhage.

Jpn J Radiol 2019 Apr 30;37(4):328-335. Epub 2019 Jan 30.

Department of Radiology, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan.

Purpose: To assess the safety and efficacy of transarterial embolization (TAE) and to evaluate the utility of contrast-enhanced computed tomography (CE-CT) for life-threatening spontaneous retroperitoneal hemorrhage (SRH).

Methods: Nineteen patients underwent TAE following CE-CT for life-threatening SRH. CE-CT and angiographic findings, technical successes, and clinical successes were evaluated. Read More

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http://dx.doi.org/10.1007/s11604-019-00815-5DOI Listing

Treatment outcomes according to the macroscopic tumor type in locally advanced esophageal squamous cell carcinoma treated by chemoradiotherapy.

Jpn J Radiol 2019 Apr 28;37(4):341-349. Epub 2019 Jan 28.

Department of Clinical Oncology, Hiroshima Prefectural Hospital, 1-5-54 Ujinakanda Minami-ku Hiroshima-shi, Hiroshima, 734-0004, Japan.

Purpose: To identify predictive factors for local control of locally advanced esophageal cancer by chemoradiotherapy, the relationship between clinical features, including macroscopic tumor type, and treatment outcome was analyzed in 83 patients.

Materials And Methods: Macroscopic tumor type was defined by endoscopy as follows: type 1: protruding type; type 2: ulcerative and localized type; type 3: ulcerative and infiltrative type; type 4: diffusely infiltrative type; and type 5: unclassifiable type. We analyzed the overall survival, cause-specific survival, local progression-free rate, and predictive factors for locally advanced esophageal cancer after chemoradiotherapy. Read More

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http://dx.doi.org/10.1007/s11604-019-00814-6DOI Listing

Differences in gross tumor volumes for pancreatic cancer: a comparison of ungated positron emission tomography and contrast-enhanced four-dimensional computed tomography.

Jpn J Radiol 2019 Apr 24;37(4):336-340. Epub 2019 Jan 24.

Department of Radiation Oncology, Kagawa University Hospital, 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan.

Purpose: We assessed differences in gross tumor volumes (GTVs) for pancreatic cancer between respiratory-ungated positron emission tomography (3D-PET) and contrast-enhanced four-dimensional computed tomography (CE-4DCT).

Materials And Methods: We evaluated the GTVs in 21 patients. The sum of the GTVs, which was individually delineated by observers 1 and 2 on the CE-4DCT images from all respiratory phases, was used as GTV-4DCT. Read More

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http://link.springer.com/10.1007/s11604-019-00812-8
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http://dx.doi.org/10.1007/s11604-019-00812-8DOI Listing
April 2019
2 Reads

Delayed appearance of transient hyperintensity foci on T1-weighted magnetic resonance imaging in acute disseminated encephalomyelitis.

Jpn J Radiol 2019 Apr 22;37(4):277-282. Epub 2019 Jan 22.

Department of Radiology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo Prefecture, Japan.

Purpose: To evaluate the frequency, characteristics, and clinical significance of transient hyperintensity foci on T1-weighted images (T1WI) in acute disseminated encephalomyelitis (ADEM).

Materials And Methods: Patients diagnosed with ADEM underwent MR studies at the time of disease onset and every 3 months or more often thereafter. The frequency and appearance timing of abnormal signals including T1WI and their morphological characteristics were evaluated. Read More

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http://dx.doi.org/10.1007/s11604-018-00808-wDOI Listing
April 2019
3 Reads

Liver fibrosis assessment using 99mTc-GSA SPECT/CT fusion imaging.

Jpn J Radiol 2019 Apr 17;37(4):315-320. Epub 2019 Jan 17.

Department of Radiological Technology, Graduate School of Health Science, Suzuka University of Medical Science, Suzuka, Japan.

Purpose: To determine the utility of mean standardized uptake value (SUV) of whole liver measured by Tc-GSA SPECT/CT fusion imaging, for evaluation of liver fibrosis.

Materials And Methods: Eighty-six patients who underwent hepatectomy were enrolled, and were classified into the non-fibrosis or fibrosis group based on the pathological findings in the resected liver specimen. Univariate and multivariate analyses were performed between the two groups on four blood biochemical indices (albumin, total bilirubin, platelet count, and prothrombin time activity) and two Tc-GSA scintigraphy-derived liver function indices (LHL and SUV) to evaluate the independent predictive value for severe fibrosis. Read More

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http://dx.doi.org/10.1007/s11604-019-00810-wDOI Listing
April 2019
2 Reads

Clinical and CT findings of small bowel obstruction caused by rice cakes in comparison with bezoars.

Jpn J Radiol 2019 Apr 16;37(4):301-307. Epub 2019 Jan 16.

Department of Diagnostic and Interventional Radiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-cho, Abeno-ku, Osaka, Osaka, 545-8585, Japan.

Purpose: Rice cakes have not been recognized as a cause of small bowel obstruction (SBO) worldwide. We compared clinical and CT findings of rice cake SBO versus SBO due to bezoars, the most common cause of food-induced SBO.

Methods: Twenty-four patients with rice cake SBO (n = 17) or bezoar SBO (n = 7) were retrospectively evaluated for clinical findings and the following multi-detector CT (MDCT) features: identification of the transition zone, presence of intraluminal lesions, degree of obstruction, and length and attenuation of obstructing materials. Read More

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http://dx.doi.org/10.1007/s11604-019-00811-9DOI Listing
April 2019
3 Reads

Imaging findings of complications after thoracic surgery.

Jpn J Radiol 2019 Mar 12;37(3):209-219. Epub 2019 Jan 12.

Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine, Pusan, South Korea.

Many surgical procedures are used for the treatment of lung, heart, and mediastinal diseases. The techniques can result in postoperative complications. The nature of these complications differs according to the duration of thoracic surgery and the onset of the complication. Read More

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http://link.springer.com/10.1007/s11604-018-00806-y
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http://dx.doi.org/10.1007/s11604-018-00806-yDOI Listing
March 2019
11 Reads

Evaluation of coronary artery variations using dual-source coronary computed tomography angiography in neonates with transposition of the great arteries.

Jpn J Radiol 2019 Apr 2;37(4):308-314. Epub 2019 Jan 2.

Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.

Objective: The purpose of this study was to investigate whether the origins and courses of the coronary arteries could be better assessed using ECG-gated dual-source computed tomography (CT) than with echocardiography in neonates with transposition of the great arteries (TGA).

Methods: A total of 17 neonates within 14 days old who underwent both echocardiography and retrospective ECG-gated coronary CT angiography were retrospectively reviewed. The patients were sedated and intubated during CT examinations, and CT images were obtained with a breath-hold. Read More

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http://dx.doi.org/10.1007/s11604-018-00807-xDOI Listing
April 2019
2 Reads

Radiation dose reduction using two orthogonal topograms associated with automatic tube voltage selection for lung CT scanning as compared with a single anteroposterior topogram.

Jpn J Radiol 2019 Apr 2;37(4):292-300. Epub 2019 Jan 2.

Department of Radiology, The First Hospital of China Medical University, No. 155 Nanjingbei Street, Shenyang, 110001, Liaoning, People's Republic of China.

Objective: To evaluate the effectiveness of two orthogonal topograms on radiation dose and image quality (IQ) associated with topogram-based automatic tube voltage selection (ATVS) for lung CT scanning.

Methods: Thirty-seven patients were enrolled in this study. At baseline, only an anteroposterior topogram was obtained and at follow-up, both anteroposterior and lateral topograms were performed. Read More

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http://dx.doi.org/10.1007/s11604-018-00809-9DOI Listing
April 2019
1 Read

Multidimensional analysis of clinicopathological characteristics of false-negative clinically significant prostate cancers on multiparametric MRI of the prostate in Japanese men.

Jpn J Radiol 2019 Feb 1;37(2):154-164. Epub 2019 Jan 1.

Department of Radiology, Kawasaki Medical School, 577 Matsushima, Kurashiki City, Okayama, 701-0192, Japan.

Purpose: To clarify clinicopathological features of false-negative clinically significant prostate cancer (csPC) at multiparametric prostate MRI (mpMRI).

Methods: 95 patients with 139 csPC undergoing 3T mpMRI before radical prostatectomy were included. Two radiologists were independently evaluated mpMR images using PI-RADS v2. Read More

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http://dx.doi.org/10.1007/s11604-018-0801-9DOI Listing
February 2019
1 Read

Postmortem computed tomographic features in the diagnosis of drowning: a comparison of fresh water and salt water drowning cases.

Jpn J Radiol 2019 Mar 1;37(3):220-229. Epub 2019 Jan 1.

Division of Diagnostic Radiology, Akita University Hospital, 1-1-1 Hondo, Akita, Akita, 010-8543, Japan.

Purpose: To investigate the effectiveness of postmortem computed tomography in the diagnosis of drowning, focusing on the comparison of fresh water and salt water cases using three-dimensionally (3D) reconstructed data.

Materials And Methods: We examined features of drowning in 25 fresh water drowning cases (FWDCs; 13 men, 12 women; mean age 73.1 years; range 43-95 years), and compared these with 12 salt water drowning cases (SWDCs; 5 men, 7 women; mean age 66. Read More

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http://link.springer.com/10.1007/s11604-018-0802-8
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http://dx.doi.org/10.1007/s11604-018-0802-8DOI Listing
March 2019
9 Reads

Pleuroparenchymal fibroelastosis-like lesions on chest computed tomography in routine clinical practice.

Jpn J Radiol 2019 Mar 1;37(3):230-236. Epub 2019 Jan 1.

Department of Radiology, Osaka Graduate School of Medicine, 2-15 Yamadaoka, Suita, Osaka, 565-0871, Japan.

Purpose: To evaluate the incidence and changes in the pleuroparenchymal fibroelastosis (PPFE)-like lesions on chest CT in routine clinical practice.

Materials And Methods: This study included 1284 patients who underwent chest CT in 2011 at a hospital. The incidence of PPFE-like lesions and their correlation with age, body mass index, and concomitant pulmonary findings were assessed. Read More

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http://dx.doi.org/10.1007/s11604-018-0805-5DOI Listing
March 2019
9 Reads

How will "democratization of artificial intelligence" change the future of radiologists?

Jpn J Radiol 2019 Jan 21;37(1):9-14. Epub 2018 Dec 21.

Division of Hematology and Rheumatology, Department of Medicine, Nihon University School of Medicine, 30-1 Oyaguchi Itabashi-Ward, Tokyo, 173-8610, Japan.

The "democratization of AI" is progressing, and it is becoming an era when anyone can utilize AI. What kind of radiologists are new generation radiologists suitable for the AI era? The first is maintaining a broad perspective regarding healthcare in its entirety. Next, it is necessary to study the basic knowledge and latest information concerning AI and possess the latest knowledge concerning modalities such as CT/MRI and imaging information systems. Read More

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http://dx.doi.org/10.1007/s11604-018-0793-5DOI Listing
January 2019
14 Reads

A diagnostic strategy for breast calcifications based on a long-term follow-up of 615 lesions.

Jpn J Radiol 2019 Mar 19;37(3):237-244. Epub 2018 Dec 19.

Breast Oncology Center, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, 3-8-31 Ariake, Koto-ku, Tokyo, 135-8550, Japan.

Purpose: To clarify the long-term outcomes of breast calcifications after stereotactic vacuum-assisted breast biopsy (SVAB) and to develop strategy after SVAB.

Methods: Subject comprised 594 patients with 615 calcifications who underwent SVAB. 371 (60. Read More

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http://link.springer.com/10.1007/s11604-018-0803-7
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http://dx.doi.org/10.1007/s11604-018-0803-7DOI Listing
March 2019
21 Reads

Computed tomographic colonography with a reduced dose of laxative using a novel barium sulfate contrast agent in Japan.

Jpn J Radiol 2019 Mar 15;37(3):245-254. Epub 2018 Dec 15.

Department of Radiology, Gifu University School of Medicine, 1-1 Yanagito, Gifu, Gifu, Japan.

Purpose: To test the tagging efficacy, patient acceptability, and accuracy of computed tomographic colonography (CTC) with a reduced dose of laxative using a novel barium sulfate (BaSO) contrast agent.

Materials And Methods: CTC followed by optical colonoscopy (OC) was performed on 73 patients with positive results in fecal occult blood tests. They were administrated a BaSO suspension and a magnesium citrate solution for bowel preparation. Read More

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http://dx.doi.org/10.1007/s11604-018-0800-xDOI Listing
March 2019
1 Read

The Third Asian Radiology Summit.

Jpn J Radiol 2019 Jan;37(1):1-8

Department of Radiology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.

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http://dx.doi.org/10.1007/s11604-018-0791-7DOI Listing
January 2019
3 Reads

Potential value of the PixelShine deep learning algorithm for increasing quality of 70 kVp+ASiR-V reconstruction pelvic arterial phase CT images.

Jpn J Radiol 2019 Feb 6;37(2):186-190. Epub 2018 Dec 6.

Department of Radiology and Biomedical Imaging, University of California, San Francisco, USA.

Objective: To investigate the effect of a deep learning-based denoising algorithm, PixelShine (PS), on the quality of 70 kVp pelvic arterial phase CT images.

Materials And Methods: A retrospective analysis was performed on arterial phase pelvic CT images from 33 patients (body-mass index ≤ 20 kg/m) obtained with a GE Revolution CT (70 kVp tube voltage; adaptive statistical iterative reconstruction-Veo-filtered back projection, 50% blending) and designated group A. Group B images were then obtained by applying PS to group A image datasets. Read More

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http://link.springer.com/10.1007/s11604-018-0798-0
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http://dx.doi.org/10.1007/s11604-018-0798-0DOI Listing
February 2019
2 Reads

The safety and efficacy of percutaneous vertebroplasty for patients over 90 years old.

Jpn J Radiol 2019 Feb 1;37(2):178-185. Epub 2018 Dec 1.

Department of Radiology, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo, 162-8655, Japan.

Objective: To retrospectively analyze the safety and efficacy of percutaneous vertebroplasty (PVP) for patients aged 90 or over.

Materials And Methods: We analyzed 130 consecutive patients with osteoporotic vertebral fractures who underwent a first-time PVP between May 2015 and September 2017 at our institution. We divided them into the elder patient group aged 90 years or over (n = 21) and the younger patient group under 90 years (n = 109). Read More

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http://dx.doi.org/10.1007/s11604-018-0797-1DOI Listing
February 2019
3 Reads

Technical and clinical overview of deep learning in radiology.

Jpn J Radiol 2019 Jan 1;37(1):15-33. Epub 2018 Dec 1.

Department of Diagnostic and Interventional Radiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan.

Deep learning has been applied to clinical applications in not only radiology, but also all other areas of medicine. This review provides a technical and clinical overview of deep learning in radiology. To gain a more practical understanding of deep learning, deep learning techniques are divided into five categories: classification, object detection, semantic segmentation, image processing, and natural language processing. Read More

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http://dx.doi.org/10.1007/s11604-018-0795-3DOI Listing
January 2019
2 Reads

Efficacy and prognostic factors of transarterial embolization as initial treatment for spontaneously ruptured hepatocellular carcinoma: a single-center retrospective analysis in 57 patients.

Jpn J Radiol 2019 Mar 3;37(3):255-263. Epub 2018 Dec 3.

Department of Interventional Radiology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Gulou District, Nanjing, 210029, China.

Purpose: To evaluate the efficacy and prognostic factors following transarterial embolization (TAE) as initial treatment for spontaneously ruptured hepatocellular carcinoma (HCC).

Methods: From June 2012 to June 2016, a total of 57 spontaneously ruptured HCC patients who received TAE as initial therapy were retrospectively studied at our institution. Patients were followed until October 2016. Read More

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http://dx.doi.org/10.1007/s11604-018-0799-zDOI Listing
March 2019
2 Reads

Machine learning studies on major brain diseases: 5-year trends of 2014-2018.

Jpn J Radiol 2019 Jan 29;37(1):34-72. Epub 2018 Nov 29.

Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kajii-cho, Kawaramachi Hirokoji Agaru, Kamigyo-ku, Kyoto, Kyoto, 602-8566, Japan.

In the recent 5 years (2014-2018), there has been growing interest in the use of machine learning (ML) techniques to explore image diagnosis and prognosis of therapeutic lesion changes within the area of neuroradiology. However, to date, the majority of research trend and current status have not been clearly illuminated in the neuroradiology field. More than 1000 papers have been published during the past 5 years on subject classification and prediction focused on multiple brain disorders. Read More

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http://dx.doi.org/10.1007/s11604-018-0794-4DOI Listing
January 2019
1 Read

Improvement of image quality at CT and MRI using deep learning.

Jpn J Radiol 2019 Jan 29;37(1):73-80. Epub 2018 Nov 29.

Department of Diagnostic Radiology, Graduate School of Biomedical and Health Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.

Deep learning has been developed by computer scientists. Here, we discuss techniques for improving the image quality of diagnostic computed tomography and magnetic resonance imaging with the aid of deep learning. We categorize the techniques for improving the image quality as "noise and artifact reduction", "super resolution" and "image acquisition and reconstruction". Read More

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http://dx.doi.org/10.1007/s11604-018-0796-2DOI Listing
January 2019
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Perfusion contrast-enhanced ultrasound to predict early lymph-node metastasis in breast cancer.

Jpn J Radiol 2019 Feb 20;37(2):145-153. Epub 2018 Nov 20.

Department of Diagnostic Radiology, Tohoku University Graduate School of Medicine, Seiryo 1-1, Sendai, 980-8574, Japan.

Purpose: To evaluate whether quantitative analysis of perfusion contrast-enhanced ultrasound (CE-US) could predict early lymph-node (LN) metastasis in clinically node-negative breast cancer.

Materials And Methods: In this prospective study, 64 breast cancer patients were selected for perfusion CE-US imaging. Regions of interest were placed where the strongest and weakest signal increases were found to obtain peak intensities (PIs; PI and PI, respectively) for time-intensity curve analyzes. Read More

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http://dx.doi.org/10.1007/s11604-018-0792-6DOI Listing
February 2019
15 Reads
0.742 Impact Factor

Can low b value diffusion weighted imaging evaluate the character of cerebrospinal fluid dynamics?

Jpn J Radiol 2019 Feb 8;37(2):135-144. Epub 2018 Nov 8.

Siemens Japan K.K., 1-11-1 Osaki, Shinagawa-ku, Tokyo, 141-0032, Japan.

Purpose: We aimed to investigate whether low b value diffusion-weighted imaging (DWI) can show the change of cerebrospinal fluid (CSF) dynamics.

Materials And Methods: The subjects of this retrospective study consisted of patients with ventricular dilatation (n = 50) and controls (n = 50). The CSF signal intensity on the b = 500 s/mm DWI was evaluated by a scoring method in the lateral, 3rd and 4th ventricles, the cerebral sulci and the Sylvian fissure. Read More

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http://link.springer.com/10.1007/s11604-018-0790-8
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http://dx.doi.org/10.1007/s11604-018-0790-8DOI Listing
February 2019
12 Reads

The feasibility of dedicated breast PET for the assessment of residual tumor after neoadjuvant chemotherapy.

Jpn J Radiol 2019 Jan 3;37(1):81-87. Epub 2018 Nov 3.

Department of Radiology, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan.

Purpose: To evaluate the utility of ring-type dedicated breast positron emission tomography (dbPET) for the detection of the residual tumor after neoadjuvant chemotherapy (NAC).

Materials And Methods: This prospective study included 27 women with histologically proven breast cancer over a 37-month period. All patients underwent ring-type dbPET followed by whole-body PET-CT (WBPET) for preoperative tumor evaluation and re-staging after NAC. Read More

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http://link.springer.com/10.1007/s11604-018-0785-5
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http://dx.doi.org/10.1007/s11604-018-0785-5DOI Listing
January 2019
6 Reads

Imaging of renal cell carcinoma in patients with acquired cystic disease of the kidney: comparison C-choline and FDG PET/CT with dynamic contrast-enhanced CT.

Jpn J Radiol 2019 Feb 30;37(2):165-177. Epub 2018 Oct 30.

Department of Radiology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan.

Purpose: To evaluate renal cell carcinoma (RCC) findings in acquired cystic disease of the kidney (ACDK) shown by C-choline and FDG PET/CT, and contrast-enhanced CT.

Materials And Methods: Six ACDK patients with 7 RCCs underwent C-choline and FDG PET/CT, and contrast-enhanced CT before nephrectomy. Findings obtained with 3 imagings were evaluated and sensitivity detecting RCC was compared using 3-point grading scale (negative, equivocal, positive). Read More

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http://link.springer.com/10.1007/s11604-018-0789-1
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http://dx.doi.org/10.1007/s11604-018-0789-1DOI Listing
February 2019
7 Reads