1,140 results match your criteria Japanese journal of radiology[Journal]


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

Jpn J Radiol 2019 Feb 2. 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
February 2019

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

Jpn J Radiol 2019 Feb 2. 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
February 2019
2 Reads

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

Jpn J Radiol 2019 Jan 31. 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
January 2019

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 Jan 30. 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
January 2019

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

Jpn J Radiol 2019 Jan 28. 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
January 2019

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 Jan 24. 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
January 2019
2 Reads

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

Jpn J Radiol 2019 Jan 22. 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
January 2019

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

Jpn J Radiol 2019 Jan 17. 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
January 2019
1 Read

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

Jpn J Radiol 2019 Jan 16. 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
January 2019
2 Reads

Imaging findings of complications after thoracic surgery.

Jpn J Radiol 2019 Jan 12. 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
January 2019
4 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 Jan 2. 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
January 2019
1 Read

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 Jan 2. 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
January 2019

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

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

Jpn J Radiol 2019 Jan 1. 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
January 2019
5 Reads

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

Jpn J Radiol 2019 Jan 1. 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
January 2019
8 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
7 Reads

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

Jpn J Radiol 2018 Dec 19. 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
December 2018
10 Reads

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

Jpn J Radiol 2018 Dec 15. 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
December 2018

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

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
1 Read

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
1 Read

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
1 Read

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 2018 Dec 3. 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
December 2018

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

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

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
10 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
8 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
3 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
5 Reads

In Reply.

Jpn J Radiol 2018 Dec 24;36(12):745. Epub 2018 Oct 24.

Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan.

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http://dx.doi.org/10.1007/s11604-018-0788-2DOI Listing
December 2018

Can the spherical gold standards be used as an alternative to painted gold standards for the computerized detection of lesions using voxel-based classification?

Jpn J Radiol 2018 Oct 20. Epub 2018 Oct 20.

Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.

Purpose: For the development of computer-assisted detection (CAD) software using voxel-based classification, gold standards defined by pixel-by-pixel painting, called painted gold standards, are desirable. However, for radiologists who define gold standards, a simplified method of definition is desirable. One of the simplest methods of defining gold standards is a spherical region, called a spherical gold standard. Read More

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http://dx.doi.org/10.1007/s11604-018-0784-6DOI Listing
October 2018
0.742 Impact Factor

Amide proton transfer imaging of tumors: theory, clinical applications, pitfalls, and future directions.

Jpn J Radiol 2019 Feb 19;37(2):109-116. Epub 2018 Oct 19.

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

Amide proton transfer (APT) imaging is an emerging molecular magnetic resonance imaging technique based on chemical exchange saturation transfer (CEST). APT imaging has shown promise in oncologic imaging, especially in the imaging of brain tumors. This review article illustrates the theory of CEST/APT imaging and describes the clinical utility, pitfalls, and potential for future development of APT imaging. Read More

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http://dx.doi.org/10.1007/s11604-018-0787-3DOI Listing
February 2019

The effectiveness of additional lead-shielding drape and low pulse rate fluoroscopy in protecting staff from scatter radiation during cardiac resynchronization therapy (CRT).

Jpn J Radiol 2019 Jan 15;37(1):95-101. Epub 2018 Oct 15.

Department of Cardiovascular Center, Tohoku Medical and Pharmaceutical University Hospital, 1-12-1 Fukumuro, Miyagino-ku, Sendai, 983-8512, Japan.

Purpose: Cardiac resynchronization therapy (CRT) often requires a long fluoroscopic time and protection from scatter radiation. This study reports on scatter radiation levels during CRT, with and without additional shielding, and using standard or low pulse rate fluoroscopy.

Materials And Methods: Additional lead-shielding drape (0. Read More

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http://dx.doi.org/10.1007/s11604-018-0783-7DOI Listing
January 2019

Hilar and mediastinal sarcoid-like reaction after the treatment of malignant tumors: imaging features and natural course on F-FDG-PET/CT.

Jpn J Radiol 2019 Jan 15;37(1):88-94. Epub 2018 Oct 15.

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

Purpose: This study aimed to assess the imaging features and natural course of hilar and mediastinal sarcoid-like reaction on F-fluorodeoxyglucose (FDG) PET/CT after the treatment of malignancies.

Methods: Sixteen patients with the appearance of sarcoid-like reaction seen on F-FDG-PET/CT after treatment were included. Hilar and mediastinal lymph node metastases were pathologically or clinically ruled out. Read More

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http://dx.doi.org/10.1007/s11604-018-0786-4DOI Listing
January 2019
2 Reads

Reliability of diagnosing acute ischemic cerebrovascular on magnetic resonance imaging disorders using iPads.

Jpn J Radiol 2018 Dec 13;36(12):726-735. Epub 2018 Oct 13.

Department of Radiology, Fujita Health University, School of Medicine, 1-98, Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan.

Purpose: The use of tablet terminals has been explored in various medical settings; however, caution should be exercised when performing image diagnosis using this technology. The present study examined the characteristics of an iPad Air™ monitor and assessed radiographic image interpretations to verify the reliability of the telediagnosis of acute cerebral infarction based on magnetic resonance imaging (MRI) using a tablet terminal.

Materials And Methods: The luminance of the iPad Air™ was measured using a UA-10 analyzer, and radiographic image interpretation experiments were performed in 100 patients who underwent MRI within 6 h of symptom onset. Read More

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http://link.springer.com/10.1007/s11604-018-0763-y
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http://dx.doi.org/10.1007/s11604-018-0763-yDOI Listing
December 2018
7 Reads

Does integrated shimming improve lesion detection in whole-body diffusion-weighted examinations of patients with breast cancer?

Jpn J Radiol 2018 Dec 27;36(12):736-743. Epub 2018 Sep 27.

Department of Radiology, Sagara Hospital Affiliated Breast Center, 3-28 Tenokuchi-cho, Kagoshima city, 892-0845, Kagoshima, Japan.

Purpose: To evaluate the feasibility of proposed integrated slice-by-slice shimming (iShim) for whole-body diffusion weighted imaging (WB-DWI) in comparison to conventional 3D shim in patients with breast cancer.

Materials And Methods: Retrospective analysis of 116 consecutive patients (116 lesions) who underwent whole-body PET/MR using iShim (iShim group) were performed and compared with historical control of 103 patients (105 lesions) using 3D Shim (3D Shim group).

Results: As compared with dynamic contrast-enhanced (DCE) breast MRI, the apparent diffusion coefficient (ADC) value could not be determined for 15 (14%) of the 105 lesions of the 3D shim group and for 10 (9%) of the 116 lesions on iShim group. Read More

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http://link.springer.com/10.1007/s11604-018-0781-9
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http://dx.doi.org/10.1007/s11604-018-0781-9DOI Listing
December 2018
9 Reads

Risk factors for atrophic gastritis in the Japanese young and middle-aged: a study using double-contrast upper gastrointestinal barium X-ray radiography.

Jpn J Radiol 2018 Dec 27;36(12):706-711. Epub 2018 Sep 27.

Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.

Purpose: To identify risk factors for atrophic gastritis in Japanese young and middle-age subjects by double-contrast upper gastrointestinal barium X-ray radiography (UGI-XR).

Materials And Methods: We included 351 consecutive Japanese subjects (158 males, 193 females; age 25-49 years, mean 44 years) seen between October 2014 and March 2016. All underwent serum Helicobacter pylori (Hp) antibody- and UGI-XR examinations. Read More

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http://dx.doi.org/10.1007/s11604-018-0782-8DOI Listing
December 2018
2 Reads

Standardization of [F-18]FDG PET/CT for response evaluation by the Radiologic Society of North America-Quantitative Imaging Biomarker Alliance (RSNA-QIBA) profile: preliminary results from the Japan-QIBA (J-QIBA) activities for Asian international multicenter phase II trial.

Jpn J Radiol 2018 Nov 24;36(11):686-690. Epub 2018 Sep 24.

Department of Diagnostic Radiology and Nuclear Medicine, Tokyo Medical and Dental University, Tokyo, Japan.

Purpose: In an Asian international multicenter phase II trial conducted in patients with peripheral T-cell lymphoma (PTCL), [F-18]FDG-PET/CT was used for evaluation of the therapeutic response. Standardization of the PET/CT scanners was necessary before patient enrollment. We therefore standardized the scanners by phantom tests based on the profile approved by the Quantitative Imaging Biomarkers Alliance (QIBA) of Radiological Society of North America (RSNA). Read More

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http://dx.doi.org/10.1007/s11604-018-0780-xDOI Listing
November 2018

CT-based mediastinal compartment classifications and differential diagnosis of mediastinal tumors.

Jpn J Radiol 2019 Feb 20;37(2):117-134. Epub 2018 Sep 20.

Department of Radiology, Faculty of Medicine, Saga University, Nabeshima 5-1-1, Saga City, Saga, 849-8501, Japan.

Division of the mediastinum into compartments is used to help narrow down the differential diagnosis of mediastinal tumors, assess tumor growth, and plan biopsies and surgical procedures. There are several traditional mediastinal compartment classification systems based upon anatomical landmarks and lateral chest radiograph. Recently, the Japanese Association of Research of the Thymus (JART) and the International Thymic Malignancy Interest Group (ITMIG) proposed new mediastinal compartment classification systems based on transverse CT images. Read More

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http://link.springer.com/10.1007/s11604-018-0777-5
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http://dx.doi.org/10.1007/s11604-018-0777-5DOI Listing
February 2019
21 Reads

Artificial intelligence using neural network architecture for radiology (AINNAR): classification of MR imaging sequences.

Jpn J Radiol 2018 Dec 19;36(12):691-697. Epub 2018 Sep 19.

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

Purpose: The confusion of MRI sequence names could be solved if MR images were automatically identified after image data acquisition. We revealed the ability of deep learning to classify head MRI sequences.

Materials And Methods: Seventy-eight patients with mild cognitive impairment (MCI) having apparently normal head MR images and 78 intracranial hemorrhage (ICH) patients with morphologically deformed head MR images were enrolled. Read More

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http://dx.doi.org/10.1007/s11604-018-0779-3DOI Listing
December 2018
2 Reads

Post-marketing surveillance of gadobutrol for contrast-enhanced magnetic resonance imaging in Japan.

Jpn J Radiol 2018 Nov 19;36(11):676-685. Epub 2018 Sep 19.

Radiology, Bayer AG, Müllerstraße 178, 13353, Berlin, Germany.

Purpose: To evaluate the safety of gadobutrol for magnetic resonance imaging in a prospective, non-interventional, post-marketing surveillance in Japan.

Materials And Methods: Gadobutrol was administered in accordance with Japanese prescribing information over a 2-year enrollment period, using a standardized questionnaire to collect information. The primary outcome was the incidence of adverse reactions (ARs) following gadobutrol injection. Read More

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http://link.springer.com/10.1007/s11604-018-0778-4
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http://dx.doi.org/10.1007/s11604-018-0778-4DOI Listing
November 2018
16 Reads

Definitive radiotherapy for hilar and/or mediastinal lymph node metastases after stereotactic body radiotherapy or surgery for stage I non-small cell lung cancer: 5-year results.

Jpn J Radiol 2018 Dec 14;36(12):719-725. Epub 2018 Sep 14.

Department of Oncology, Immunology and Surgery, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan.

Purpose: The optimal treatment for hilar or mediastinal lymph node (LN) recurrence developing after stereotactic body radiotherapy (SBRT) for stage I non-small cell lung cancer remains unclear. This study evaluated 5-year results of radiotherapy in such patients in comparison with those for postoperative LN metastases.

Materials And Methods: Between 2004 and 2013, 27 patients with hilar and/or mediastinal LN metastases without local recurrence and distant metastasis after SBRT (n = 14) or surgery (n = 13) were treated with definitive conventional radiotherapy. Read More

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http://dx.doi.org/10.1007/s11604-018-0776-6DOI Listing
December 2018
4 Reads

Three-dimensional computed tomographic angiography with computed tomographic colonography for laparoscopic colorectal surgery.

Jpn J Radiol 2018 Dec 14;36(12):698-705. Epub 2018 Sep 14.

Department of Radiology, St Marianna University School of Medicine, Kawasaki, Kanagawa, Japan.

Purpose: To prospectively correlate the preoperative vessel anatomy in three-dimensional computed tomographic angiography with computed tomographic colonography (3D-CTA with CTC) with that in laparoscopic surgery for colorectal cancer.

Methods: The study protocol was approved by our institutional review board. The study population consisted of 101 patients with colon cancer who underwent 3D-CTA with CTC between June 2016 and January 2018. Read More

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http://dx.doi.org/10.1007/s11604-018-0775-7DOI Listing
December 2018

Combined radiotherapy with nivolumab for extracranial metastatic malignant melanoma.

Jpn J Radiol 2018 Dec 11;36(12):712-718. Epub 2018 Sep 11.

Department of Radiation Oncology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, Japan.

Purpose: We retrospectively evaluated the tumor regression after radiotherapy in combination with the immune checkpoint inhibitor nivolumab for metastatic melanoma.

Materials And Methods: We evaluated the extracranial metastatic melanoma lesions to which concomitant radiotherapy with nivolumab was administered from June 2015 to February 2017. Tumor volume and maximum diameter were measured at the time of pre-radiotherapy and best response, and the tumor reduction rate was assessed in two ways that our hospital adopts: tumor volume and diameter. Read More

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http://dx.doi.org/10.1007/s11604-018-0774-8DOI Listing
December 2018
1 Read

Internal mammary lymph node metastases in breast cancer: what should radiologists know?

Jpn J Radiol 2018 Nov 7;36(11):629-640. Epub 2018 Sep 7.

Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.

The internal mammary lymph node (IMLN) chain is a pathway through which breast lymphatic drainage flows. The internal mammary lymphatic vessel runs around the internal mammary artery and veins with IMLN in the parasternal intercostal spaces. IMLN metastasis, which forms a part of clinical TNM staging, may negatively affect the prognosis of primary breast cancer patients. Read More

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http://dx.doi.org/10.1007/s11604-018-0773-9DOI Listing
November 2018
5 Reads

Improvement in radiological reading efficiency and residents' education and clinical contribution using the modified reading system "Triage Reader".

Jpn J Radiol 2018 Nov 1;36(11):649-660. Epub 2018 Sep 1.

Department of Radiology, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-1301, Japan.

Purpose: To assess whether the modified reading system "Triage Reader" (TR) can improve the radiological reading work environment.

Materials And Methods: This retrospective, single-center study analyzed two reading systems for 26,786 computed tomography and magnetic resonance imaging examinations. In the conventional system (January 1-May 31, 2016), all reading work was mostly completed within the day. Read More

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http://dx.doi.org/10.1007/s11604-018-0772-xDOI Listing
November 2018
4 Reads

Diagnostic Radiology Service in Japan.

Jpn J Radiol 2018 Oct;36(10):575-578

Department of Radiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.

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http://dx.doi.org/10.1007/s11604-018-0770-zDOI Listing
October 2018

Emergency radiology after a massive earthquake: clinical perspective.

Jpn J Radiol 2018 Nov 25;36(11):641-648. Epub 2018 Aug 25.

Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto-shi, Kumamoto, 860-8556, Japan.

Earthquakes are unpredictable and inevitable disasters, causing various earthquake-related disorders. Medical imaging, including digital radiography, computed tomography, and magnetic resonance imaging, plays a key role in the evaluation of earthquake-related disorders. We here demonstrate the concept of diagnostic imaging after a massive earthquake and review the common imaging features of various disorders in casualties and evacuees. Read More

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http://dx.doi.org/10.1007/s11604-018-0771-yDOI Listing
November 2018
9 Reads

A comparison of two types of microcatheters used for a novel external carotid arterial sheath system for intra-arterial chemotherapy of head and neck cancer.

Jpn J Radiol 2018 Oct 18;36(10):622-628. Epub 2018 Aug 18.

Department of Head and Neck Otorhinolaryngology, Ise Red Cross Hospital, 471-2 Funae 1 Choume, Ise-shi, Mie, 516-8512, Japan.

Purpose: We developed an external carotid arterial sheath (ECAS) for performing intra-arterial chemotherapy (IACT) via the superficial temporal artery for head and neck cancer. This study aimed to assess the potential of a novel microcatheter with a steerable tip inserted through the ECAS in comparison to an existing hook-type microcatheter.

Materials And Methods: The same operator used two types of microcatheters alternately for each weekly IACT session with the same patient, and the fluoroscopy time required for catheterization and the arterial selectivity of each microcatheter were compared. Read More

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http://dx.doi.org/10.1007/s11604-018-0769-5DOI Listing
October 2018
2 Reads
0.742 Impact Factor