9,002 results match your criteria Acta Radiologica[Journal]


Estimation of the organ of origin of peri-ampullary malignancy by preoperative CT scan.

Acta Radiol 2022 May 20:2841851221096284. Epub 2022 May 20.

6634University Hospitals Plymouth NHS Trust, Derriford Hospital, Plymouth, UK.

Background: Tumors occurring within the pancreatic head commonly arise from the pancreas, duodenal ampulla, distal bile duct, or duodenum. However, they are difficult to distinguish on standard preoperative imaging.

Purpose: To assess the ability of specialist reporting of preoperative computed tomography (CT) scans to determine the organ of origin of pancreatic cancer (PC). Read More

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The evaluation of portal hypertension in cirrhotic patients with spectral computed tomography.

Acta Radiol 2022 May 20:2841851221101356. Epub 2022 May 20.

Department of Interventional Oncology, Renji Hospital, 71140Shanghai Jiao Tong University School of Medicine, Shanghai, PR China.

Background: Iodine concentrations measured using dual-energy spectral CT (DESCT) have been recently proposed as providing good performance for examining tissues hemodynamics.

Purpose: To evaluate the diagnostic efficacy of DESCT-derived parameters in evaluating portal venous pressure in patients with liver cirrhosis.

Material And Methods: A total of 71 patients with liver cirrhosis who underwent percutaneous transhepatic portal vein puncture procedures were included in this study. Read More

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Prevalence of Paget's disease of bone: review of consecutive abdominopelvic CT scans and literature.

Acta Radiol 2022 May 17:2841851221101881. Epub 2022 May 17.

Division of Musculoskeletal Imaging and Intervention, Department of Radiology, 2348Massachusetts General Hospital, and Harvard Medical School, Boston, MA, USA.

Background: Previous studies suggest an overall decrease of Paget's disease of bone (PDB) prevalence. However, a large number of asymptomatic patients make previously reported prevalence likely underrepresented.

Purpose: To evaluate the prevalence of PDB in our patient population. Read More

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Early plasma D-dimer as a predictor of acute intracranial atherosclerosis-related large vessel occlusion in acute ischemic stroke.

Acta Radiol 2022 May 15:2841851221097463. Epub 2022 May 15.

Department of Interventional Radiology, 74734The First Affiliated Hospital with Nanjing Medical University, Nanjing, PR China.

Background: Intracranial atherosclerosis-related large vessel occlusion (ICAS+LVO) poses an important technical challenge for endovascular thrombectomy (EVT).

Purpose: To evaluate the value of D-dimer in predicting ICAS+LVO alone and in combination with other clinical and imaging predictors.

Material And Methods: Consecutive patients who underwent EVT at our center between January 2018 and June 2021 were retrospectively reviewed. Read More

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CT angiography before digital subtraction angiography in patients of gastrointestinal bleeding with hemodynamic instability: do we have an answer?

Acta Radiol 2022 May 15:2841851221101354. Epub 2022 May 15.

Department of Radiodiagnosis and Interventional Radiology, 28730All India Institute of Medical Sciences, New Delhi, India.

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Development of a deep learning-based auto-segmentation algorithm for hepatocellular carcinoma (HCC) and application to predict microvascular invasion of HCC using CT texture analysis: preliminary results.

Acta Radiol 2022 May 16:2841851221100318. Epub 2022 May 16.

Medical IP Co., Ltd, Seoul, Republic of Korea.

Background: Automatic segmentation has recently been developed to yield objective data. Prediction of microvascular invasion (MVI) of hepatocellular carcinoma (HCC) using radiomics has been reported.

Purpose: To develop a deep learning-based auto-segmentation algorithm (DL-AS) for the detection of HCC and to predict MVI using computed tomography (CT) texture analysis. Read More

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The effect of ulnar variance on the pisotriquetral joint.

Acta Radiol 2022 May 12:2841851221100317. Epub 2022 May 12.

Department of Radiology, 485550Izmir Katip Celebi University, Ataturk Training and Research Hospital, Izmir, Turkey.

Background: Pisotriquetral joint (PTJ) disorders are an important cause of ulnar-sided wrist pain but are often underrecognized. Ulnar variance (UV) has been associated with several wrist pathologies.

Purpose: To determine the effect of UV on PTJ in patients with trauma. Read More

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Spatial analysis of acoustic noise transfer function with a human-body phantom in a clinical MRI scanner.

Acta Radiol 2022 May 11:2841851221100079. Epub 2022 May 11.

Department of Radiology, Graduate School of Medical Sciences, 12858Kanazawa University, Kanazawa, Ishikawa, Japan.

Background: The acoustic noise in magnetic resonance imaging (MRI) potentially depends on the measurement position and presence of a patient inside the scanner bore.

Purpose: To analyze the spatial characteristics of the acoustic noise by using the gradient-pulse-to-acoustic-noise transfer function (GPAN-TF) with and without a human-body phantom on the examination table.

Material And Methods: Acoustic noise waveforms were acquired at 80 and 110 measurement positions with and without a phantom. Read More

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Is the Femoral-Epiphyseal Acetabular Roof (FEAR) index associated with hip pain in patients with hip dysplasia?

Acta Radiol 2022 May 11:2841851221093840. Epub 2022 May 11.

Department of Orthopaedic Surgery, 11297Aarhus University Hospital, Aarhus, Denmark.

Background: Micro instability of the hip joint has been suggested to cause pain in patients with hip dysplasia. Recently, the Femoral-Epiphyseal Acetabular Roof (FEAR) index has been developed to evaluate hip instability in patients with dysplasia.

Purpose: To investigate associations between the FEAR index and patient-reported outcomes before and six months after periacetabular osteotomy (PAO). Read More

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Improving data adequacy of ultrasonography reports for non-alcoholic fatty liver disease (NAFLD) through a national structured template.

Acta Radiol 2022 May 11:2841851221093141. Epub 2022 May 11.

Department of Medical Informatics, School of Medicine, 37552Mashhad University of Medical Sciences, Mashhad, Iran.

Background: Non-alcoholic fatty liver disease (NAFLD) is a prevalent disorder that increases due to lifestyle, the rising rate of obesity, and population ages worldwide. Diagnostic ways, including sonography, do not have an explicit reporting structure.

Purpose: To create a structure template for NAFLD reporting, investigate its completeness, and assess the specialist opinions of using it in clinical practice. Read More

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Brain MRI features of anti-N-methyl-D-aspartate (anti-NMDA) receptor encephalitis secondary to central nervous system infection in adult patients.

Acta Radiol 2022 May 9:2841851221091443. Epub 2022 May 9.

Department of Radiology, Huashan Hospital, 535039Fudan University, Shanghai, PR China.

Background: Anti-N-methyl-D-aspartate receptor (anti-NMDAR) encephalitis secondary to central nervous system (CNS) infection is a unique subtype of the autoimmune-mediated disease, of which the imaging features are unclear.

Purpose: To compare the brain magnetic resonance imaging (MRI) features between the anti-NMDAR encephalitis secondary to CNS infection and that without initial infection.

Material And Methods: A total of 70 adult patients with anti-NMDAR encephalitis were retrospectively enrolled (24 in the post-infection group, 46 in the non-infection-related group). Read More

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Non-invasive angiographic analysis of dural carotid cavernous fistula using time-of-flight MR angiography and silent MR angiography: a comparative study.

Acta Radiol 2022 May 9:2841851221097462. Epub 2022 May 9.

Department of Imaging Sciences and Interventional Radiology, 29354Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, Kerala, India.

Background: A non-invasive, reliable imaging modality that characterizes cavernous sinus dural arteriovenous fistula (CSDAVF) is beneficial for diagnosis and to assess resolution on follow-up.

Purpose: To assess the utility of 3D time-of-flight (TOF) and silent magnetic resonance angiography (MRA) for evaluation of CSDAVF from an endovascular perspective.

Material And Methods: This prospective study included 37 patients with CSDAVF, who were subjected to digital subtraction angiography (DSA) and 3-T MR imaging with 3D TOF and silent MRA. Read More

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Safety and effectiveness of simultaneous localization of multiple lung nodules using coils and risk factors for pneumothorax: a retrospective study.

Authors:
Min Ai

Acta Radiol 2022 May 6:2841851221093764. Epub 2022 May 6.

Department of Interventional Therapy, Jinling Hospital, Clinical School of Medical College, Nanjing University, Nanjing, PR China.

Background: Localization of lung nodule before video-assisted thoracoscopic surgery (VATS) can help the surgeon to quickly and accurately find the lesion during surgery.

Purpose: To evaluate the safety and effectiveness of using coils to simultaneously locate multiple lung nodules under computed tomography guidance and to clarify the risk factors for pneumothorax.

Material And Methods: From January 2020 to December 2020, 61 patients underwent simultaneous localization of multiple lung nodules (Group A) and 120 patients underwent localization of a single lung nodule (Group B). Read More

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Reference ranges of fetal cisterna magna volume measurements by three-dimensional ultrasonography in the late second trimester considering sonographic experience.

Acta Radiol 2022 May 6:2841851221098846. Epub 2022 May 6.

Department of Obstetrics and Gynecology, Süleyman Demirel University Faculty of Medicine, Isparta, Turkey.

Background: Volume measurements of fetal cisterna magna (CM) by three-dimensional (3D) ultrasonography may have a role in the diagnosis of various posterior fossa abnormalities.

Purpose: To evaluate reference intervals and reliability of fetal CM volume values by virtual organ computer-aided analysis (VOCAL) in structurally normal fetuses, considering experience of evaluators.

Material And Methods: Three operators with different 3D sonography experience levels measured CM volumes of 100 structurally normal fetuses at 18-27 weeks of gestation. Read More

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Establishment of diagnostic reference levels in low-dose renal computed tomography.

Acta Radiol 2022 May 3:2841851221095238. Epub 2022 May 3.

Medical Imaging Sciences, Faculty of Health Sciences, University College Cork, Cork, Ireland.

Background: Increased radiation doses from computed tomography (CT) examinations is well known with proven risks of inducing cancers for effective dose >100 mSv (according to some studies >50 mSvs).

Purpose: To establish the diagnostic reference level (DRL) for low-dose renal CT examinations in the evaluation of renal stones.

Material And Methods: Patient demographics, CT parameters, and dosimetric indices (CTDI and dose length product [DLP]) were collected from 12 tertiary hospitals that routinely perform renal CT in the detection and evaluation of renal stones over a period of 12 weeks. Read More

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Virtual versus true non-contrast images of the brain from spectral detector CT: comparison of attenuation values and image quality.

Acta Radiol 2022 May 3:2841851221093763. Epub 2022 May 3.

Department of Radiology, University Hospitals Cleveland Medical Center and Case Western Reserve University, Cleveland, OH, USA.

Background: Prior studies focused on utilization of dual-energy computed tomography (DECT) to better detect intracranial pathology and to reduce artifacts. It is still unclear whether virtual non-contrast (VNC) images of DECT can replace true non-contrast (TNC) images.

Purpose: To compare attenuation values and image quality of VNC images to TNC images of the brain, obtained using spectral detector CT (SDCT). Read More

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Non-ECG-gated high-pitch CT angiography versus hybrid ECG-gated CT angiography for aorta using 512-slice CT: comparison of image quality and radiation dose.

Acta Radiol 2022 May 3:2841851221095925. Epub 2022 May 3.

Department of Radiology, 220312Pusan National University Hospital, Pusan National University School of Medicine and Medical Research Institute, Busan, Republic of Korea.

Background: There have been few reports comparing image quality and radiation dose of aorta computed tomography angiography (CTA) between the high-pitch and the hybrid technique.

Purpose: To compare the image quality and radiation dose among non-electrocardiogram (ECG)-gated high-pitch CTA and hybrid ECG-gated CTA of the aorta using 512-slice CT.

Material And Methods: This retrospective study included 110 patients who underwent non-ECG-gated high-pitch CTA (group 1) or hybrid ECG-gated CTA (group 2) of the entire aorta. Read More

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Laryngeal and hypopharyngeal squamous cell carcinoma: association between quantitative parameters derived from dual-energy CT and histopathological prognostic factors.

Acta Radiol 2022 May 3:2841851221095237. Epub 2022 May 3.

Department of Radiology, 74734First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China.

Background: Dual-energy computed tomography (DECT) can provide objective evaluation of laryngeal and hypopharyngeal squamous cell carcinoma (LHSCC).

Purpose: To investigate the relationship between quantitative parameters acquired from DECT and histopathological prognostic factors in LHSCC.

Material And Methods: A total of 65 patients with LHSCC who underwent arterial phase and venous phase DECT scans were retrospectively enrolled. Read More

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CT after emergency surgery in penetrating trauma: a seven-year experience in a level I Nordic trauma center.

Acta Radiol 2022 May 3:2841851221094966. Epub 2022 May 3.

Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institute, Stockholm, Sweden.

Background: Patients with severe penetrating trauma may require emergency surgery on arrival, and postoperative computed tomography (CT) can reveal significant additional injuries.

Purpose: To determine the utility of postoperative CT performed within 48 h of emergency surgery after penetrating trauma.

Material And Methods: Trauma registry data were retrieved over a seven-year period at a single level 1 trauma center. Read More

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Aberrant changes of dynamic global synchronization in patients with Parkinson's disease.

Acta Radiol 2022 Apr 28:2841851221094967. Epub 2022 Apr 28.

Department of Radiology, 372209Taizhou People's Hospital, Fifth Affiliated Hospital of Nantong University, Taizhou, Jiangsu, PR China.

Background: Patients with Parkinson's disease (PD) have been documented with disrupted dynamic profiles of functional connectivity. However, the complementary information that is relevant to the dynamic pattern of global synchronization in patients with PD requires further investigation.

Purpose: To reveal the aberrant dynamic profiles of global synchronization involved in PD with a focus on temporal variability, strength, and property. Read More

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Ancillary findings in distinguishing between anterior cruciate ligament mucoid degeneration and sprain on MRI: a practical approach.

Acta Radiol 2022 Apr 28:2841851221090623. Epub 2022 Apr 28.

Department of Radiology, Izmir Katip Celebi University Ataturk Training and Research Hospital, Izmir, Turkey.

Background: Imaging findings of both anterior cruciate ligament (ACL) sprain and mucoid degeneration overlap in some cases, which may cause errors in magnetic resonance imaging (MRI) evaluation.

Purpose: To determine the ancillary findings on MRI in distinguishing between ACL sprain and mucoid degeneration, and also to obtain a diagnostic scheme.

Material And Methods: MRI scans of 77 patients with ACL mucoid degeneration and 77 cases with ACL sprain were retrospectively evaluated to compare with regard to parameters of age, sex, side, the status of posterior cruciate ligament - medial collateral ligament - lateral collateral ligament, bone marrow edema, intraosseous cyst, subchondral sclerosis, chondromalacia, meniscus tear, effusion, and osteochondral body. Read More

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Different hemodynamics of basal ganglia between moyamoya and non-moyamoya diseases using intravoxel incoherent motion imaging and single-photon emission computed tomography.

Acta Radiol 2022 Apr 24:2841851221092895. Epub 2022 Apr 24.

Department of Radiology, Clinical Research Institute, 37085National Hospital Organization Kyushu Medical Center, Fukuoka, Japan.

Background: Moyamoya disease (MMD) and non-MMD have different pathogenesis, clinical presentation, and treatment policy.

Purpose: To identify differences in hemodynamics between MMD and non-MMD using intravoxel incoherent motion (IVIM) magnetic resonance imaging (MRI) and single-photon emission computed tomography (SPECT).

Material And Methods: Patients who had undergone Tc-ECD or I-IMP SPECT, and IVIM imaging were retrospectively studied. Read More

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Magnetic resonance imaging as a first-choice imaging modality in carpal tunnel syndrome: new evidence.

Acta Radiol 2022 Apr 18:2841851221094227. Epub 2022 Apr 18.

Department of Radiology, University of Medicine and Pharmacy, 95414Hue University, Hue, Vietnam.

Background: Carpal tunnel syndrome (CTS) is the most common type of peripheral nerve compression. Magnetic resonance imaging (MRI) is becoming more popular in practice in the evaluation of CTS.

Purpose: To evaluate the diagnostic value of MRI in CTS. Read More

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Vascular anomalies: nomenclature, classification, and imaging algorithms.

Acta Radiol 2022 Apr 12:2841851221082241. Epub 2022 Apr 12.

Department of Plastic, Reconstructive and Burns Surgery, Department of Radiodiagnosis and Interventional Radiology, 28730All India Institute of Medical Sciences, New Delhi, India.

There is a lot of ambiguity in the usage of correct terminology in the description of vascular malformations and tumors. Hemangioma and arteriovenous malformation (AVM) are the most commonly used terms and are the mostly incorrectly used as well! The aim of this review article was to lay out the correct nomenclature and describe the correct usage for the physicians and radiologists involved in diagnosing and managing these lesions. We describe the various classification systems which have been devised to define the multiple entities included under vascular anomalies. Read More

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Automatic diagnosis and grading of patellofemoral osteoarthritis from the axial radiographic view: a deep learning-based approach.

Acta Radiol 2022 Apr 12:2841851221092164. Epub 2022 Apr 12.

Department of Radiology, 26447Peking University First Hospital, Beijing, PR China.

Background: Patellofemoral osteoarthritis (PFOA) has a high prevalence and is assessed on axial radiography of the patellofemoral joint (PFJ). A deep learning (DL)-based approach could help radiologists automatically diagnose and grade PFOA via interpreting axial radiographs.

Purpose: To develop and assess the performance of a DL-based approach for diagnosing and grading PFOA on axial radiographs. Read More

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Pelvic CT in addition to MRI to differentiate between rectal and sigmoid cancer on imaging using the sigmoid take-off as a landmark.

Acta Radiol 2022 Apr 11:2841851221091209. Epub 2022 Apr 11.

Department of Radiology, 1228The Netherlands Cancer Institute, Amsterdam, The Netherlands.

Background: The sigmoid take-off (STO) is a recently established landmark to discern rectal from sigmoid cancer on imaging. STO-assessment can be challenging on magnetic resonance imaging (MRI) due to varying axial planes.

Purpose: To establish the benefit of using computed tomography (CT; with consistent axial planes), in addition to MRI, to anatomically classify rectal versus sigmoid cancer using the STO. Read More

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Long-term integrity of 53 iliac vein stents after catheter-directed thrombolysis.

Acta Radiol 2022 Apr 11:2841851221090118. Epub 2022 Apr 11.

Department of Vascular Surgery, 53147Gentofte Hospital and Rigshospitalet, University of Copenhagen, Denmark.

Background: Long-term surveillance data on venous stent integrity is sparse. There is limited knowledge on whether duplex ultrasound (DUS) can detect potential stent deformities such as kinking, straightening, and fracture, which may impact long-term patency of the stented veins.

Purpose: To assess venous stent integrity after at least five years of follow-up and to establish the efficacy of DUS as surveillance in patients with venous stent. Read More

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The influence of artificial intelligence assistance on the diagnostic performance of CCTA for coronary stenosis for radiologists with different levels of experience.

Acta Radiol 2022 Apr 7:2841851221089263. Epub 2022 Apr 7.

Department of Radiology, Beijing Friendship Hospital, 535066Capital Medical University, Beijing, PR China.

Background: The interpretation of coronary computed tomography angiography (CCTA) stenosis may be difficult among radiologists of different experience levels. Artificial intelligence (AI) may improve the diagnostic performance.

Purpose: To investigate whether the diagnostic performance and time efficiency of radiologists with different levels of experience in interpreting CCTA images could be improved by using CCTA with AI assistance (CCTA-AI). Read More

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High-altitude exposure duration dependent global and regional gray matter volume decrease in healthy immigrants: a cross-sectional study.

Acta Radiol 2022 Apr 4:2841851221091674. Epub 2022 Apr 4.

104607Medical School of Chinese People's Liberation Army, Beijing, PR China.

Background: The correlation between brain injury and high-altitude (HA) exposure duration (Dur_HA) as well as peripheral oxygen saturation (SpO) remains unclear.

Purpose: To evaluate the global and regional brain volume differences between HA immigrants and sea-level residents, and the relationship between brain volume with Dur_HA and SpO.

Material And Methods: Structural magnetic resonance imaging (MRI) scans were acquired in 33 healthy male HA immigrants (HA group) and 33 matched sea-level male residents (SL group). Read More

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No correlation between diffuse idiopathic skeletal hyperostosis and coronary artery disease on computed tomography using two different scoring systems.

Acta Radiol 2022 Apr 4:2841851221090890. Epub 2022 Apr 4.

Department of Diagnostic Imaging, 26744Sheba Medical Center, Tel Hashomer, Israel, affiliated with the Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.

Background: An association between diffuse idiopathic skeletal hyperostosis (DISH) and a history of coronary artery disease (CAD) was previously reported.

Purpose: To investigate the association between DISH and CAD as assessed using the coronary artery calcification score (CACS) and the CAD-Reporting and Data System (CAD-RADS) score in patients with symptomatic chest pain.

Material And Methods: Consecutive cardiac CT scans performed before and after IV contrast administration were evaluated for CACS (Agatston method), CAD-RADS, and the presence of DISH. Read More

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