7,922 results match your criteria Journal of Computer Assisted Tomography [Journal]


Kinematic Analysis of the Distal Radioulnar Joint in Asymptomatic Wrists Using 4-Dimensional Computed Tomography-Motion Pattern and Interreader Reliability.

J Comput Assist Tomogr 2019 Feb 11. Epub 2019 Feb 11.

Department of Plastic and Reconstructive Surgery, Johns Hopkins University, Baltimore, MD.

Purpose: The aim of this study was to determine the normal measurement values and interobserver performance of the distal radioulnar joint during wrist pronation-supination using 4-dimensional computed tomography (CT).

Methods: Four-dimensional CT examinations were performed on the asymptomatic contralateral wrists of 10 patients with unilateral chronic wrist pain. Measurements were conducted using the modified radioulnar (mRU) line and epicenter (Epi) methods. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000839DOI Listing
February 2019

Comparison of Cone-Beam Computed Tomography and Multislice Computed Tomography in the Assessment of Extremity Fractures.

J Comput Assist Tomogr 2019 Feb 11. Epub 2019 Feb 11.

Emergency Department, Hôpital Edouard Herriot, Hospices Civils de Lyon.

Objectives: The aims of this study were to evaluate the agreement between cone-beam computed tomography (CBCT) and multislice computed tomography for the characterization of extremity fractures and to compare image quality, radiation dose, and patient tolerance.

Methods: Thirty-six patients with suspected fracture affecting distal extremities or who required preoperative fracture assessment were enrolled prospectively. Each patient underwent CBCT and multislice computed tomography the same day. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000843DOI Listing
February 2019

Lesser Known Facts of Small Cell Lung Cancer.

J Comput Assist Tomogr 2019 Feb 11. Epub 2019 Feb 11.

From the University Hospitals-Cleveland Medical Center, Cleveland, OH.

Until recently, the treatment of small cell lung cancer (SCLC), a malignancy classically described as having a robust response to first-line therapy with near-universal recurrence, has remained relatively unchanged. Advancements in the management of SCLC have lagged behind those seen for non-small cell lung cancers. As the era of precision medicine and targeted immunotherapy evolves, radiologists must be familiar with the modern treatment paradigms of SCLC and associated imaging patterns, including classic and nonclassic appearances of treatment complications. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000847DOI Listing
February 2019

Apparent Diffusion Coefficient of the Placenta and Fetal Organs in Intrauterine Growth Restriction.

J Comput Assist Tomogr 2019 Feb 11. Epub 2019 Feb 11.

From the Departments of Diagnostic Radiology and Obstetrics and Gynecology, Mansoura Faculty of Medicine, Mansoura. Egypt.

Purpose: This study aimed to assess apparent diffusion coefficient (ADC) of the placenta and fetal organs in intrauterine growth restriction (IUGR).

Materials And Methods: A prospective study of 30 consecutive pregnant women (aged 21-38 years with mean age of 31.5 years and a mean gestational week of 35 ± 2. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000844DOI Listing
February 2019

Does the Tube Voltage Affect the Characterization of Coronary Plaques on 100- and 120-kVp Computed Tomography Scans.

J Comput Assist Tomogr 2019 Feb 11. Epub 2019 Feb 11.

Department of Diagnostic Radiology, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima.

Objective: The aim of this study was to compare the diagnostic performance of 100- and 120-kVp coronary computed tomography (CT) angiography (CCTA) scans for the identification of coronary plaque components.

Methods: We included 116 patients with coronary plaques who underwent CCTA and integrated backscatter intravascular ultrasound studies. On 100-kVp scans, we observed 24 fibrous and 24 fatty/fibrofatty plaques; on 120-kVp scans, we noted 27 fibrous and 41 fatty/fibrofatty plaques. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000845DOI Listing
February 2019

Spectral Computed Tomography Imaging in the Differential Diagnosis of Lung Cancer and Inflammatory Myofibroblastic Tumor.

J Comput Assist Tomogr 2019 Feb 11. Epub 2019 Feb 11.

From the Department of Radiology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.

Objective: The aim of this study was to explore the value of spectral computed tomography (CT) imaging in differentiating lung cancer from inflammatory myofibroblastic tumor (IMT).

Methods: One hundred twelve patients with 96 lung cancers and 16 IMTs underwent spectral CT during arterial phase (AP) and venous phase (VP). The normalized iodine concentration in AP (NICAP) and VP (NICVP), slope of spectral Hounsfield unit curve in AP (λAP) and VP (λVP), and normalized iodine concentration difference between AP and VP (ICD) were calculated. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000840DOI Listing
February 2019

Evaluation of Adaptive Statistical Iterative Reconstruction-V Reconstruction Algorithm vs Filtered Back Projection in the Detection of Hypodense Liver Lesions: Reader Performance and Preferences.

J Comput Assist Tomogr 2019 Feb 11. Epub 2019 Feb 11.

College of Public Health, University of Nebraska Medical Center, Omaha, NE.

Objective: The aim of the study was to evaluate diagnostic accuracy and readers' experience in the detection of focal liver lesions on computed tomography with Adaptive Statistical Iterative Reconstruction-V (ASIR-V) reconstruction compared with filtered back projection (FBP) scans.

Methods: Fifty-five patients with liver lesions had FBP and ASIR-V scans. Two radiologists independently reviewed both sets of computed tomography scans, identifying and characterizing liver lesions. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000830DOI Listing
February 2019

Volume Computed Tomography Perfusion Imaging: Evaluation of the Significance in Oncologic Follow-up of Metastasizing Renal Cell Carcinoma in the Early Period of Targeted Therapy - Preliminary Results.

J Comput Assist Tomogr 2019 Feb 11. Epub 2019 Feb 11.

Department of Radiology, and.

Introduction: The aim of this study was to assess the significance of volume computed tomography perfusion imaging of metastasizing renal cell carcinoma (mRCC) in the early period after the initiation of targeted therapy.

Methods: Blood flow (BF), blood volume, and clearance (CL) were calculated in 10 patients with histologically verified mRCC before and 1 month after initiation of targeted therapy using compartmental analysis algorithms. In addition, the longest diameter of tumor was measured for both time points and compared. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000848DOI Listing
February 2019

Associations Between Magnetic Resonance Imaging Findings and Clincopathologic Factors in Triple-Negative Breast Cancer.

J Comput Assist Tomogr 2019 Jan 17. Epub 2019 Jan 17.

College of Medicine, The Catholic University of Korea, Seoul, South Korea.

Objective: The aim of the study was to evaluate the magnetic resonance imaging findings associated with clinicopathologic factors in patients with triple-negative breast cancer.

Methods: One hundred one patients with surgically confirmed triple-negative breast cancer who underwent preoperative breast magnetic resonance imaging with diffusion-weighted imaging (DWI) were included in this study. Presence of rim enhancement on contrast-enhanced T1-weighted imaging and hyperintense rim on DWI were visually assessed. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000835DOI Listing
January 2019
3 Reads

The Application of Intravoxel Incoherent Motion Diffusion-Weighted Imaging in the Diagnosis of Hilar Obstructive Jaundice.

J Comput Assist Tomogr 2019 Jan 17. Epub 2019 Jan 17.

Objective: The aim of this study was to investigate the potential of intravoxel incoherent motion diffusion-weighted imaging in diagnosing hilar obstructive jaundice.

Methods: Fifty-nine patients diagnosed with hilar obstructive jaundice were enrolled in our hospital form January 2017 to January 2018. All the patients received scanning by a 3. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000837DOI Listing
January 2019

Highly Accelerated Breath-Hold Noncontrast Electrocardiographically-and Pulse-Gated Balanced Steady-State Free Precession Magnetic Resonance Angiography of the Thoracic Aorta: Comparison With Electrocardiographically-Gated Computed Tomographic Angiography.

J Comput Assist Tomogr 2019 Jan 17. Epub 2019 Jan 17.

UIH America, Inc, Houston, TX.

Objective: The aim of this study was to evaluate agreement of measured thoracic aortic caliber in patients with aortic disease, using electrocardiographically-(ECG) and pulse-gated breath-hold noncontrast balanced steady-state free precession MRA (ECG-MRA, P-MRA) at 1.5 T, compared with ECG-gated computed tomographic angiography (CTA).

Methods: Thirty-one patients underwent ECG-MRA, P-MRA, and CTA. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000838DOI Listing
January 2019

Radiomics for Classifying Histological Subtypes of Lung Cancer Based on Multiphasic Contrast-Enhanced Computed Tomography.

J Comput Assist Tomogr 2019 Jan 17. Epub 2019 Jan 17.

Department of Radiology, Columbia University Medical Center, New York, NY.

Objectives: The aim of this study was to evaluate the performance of the radiomics method in classifying lung cancer histological subtypes based on multiphasic contrast-enhanced computed tomography (CT) images.

Methods: A total of 229 patients with pathologically confirmed lung cancer were retrospectively recruited. All recruited patients underwent nonenhanced and dual-phase chest contrast-enhanced CT; 1160 quantitative radiomics features were calculated to build a radiomics classification model. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000836DOI Listing
January 2019
4 Reads
1.602 Impact Factor

Imaging of Moyamoya Disease and Moyamoya Syndrome: Current Status.

J Comput Assist Tomogr 2018 Dec 26. Epub 2018 Dec 26.

Department of Radiology, Dongfeng People's Hospital, Guangdong, Shongshan, China.

Moyamoya disease (MMD) and Moyamoya syndrome (MMS) are referring to a progressive steno-occlusive vasculopathy at terminal portions of the bilateral internal carotid arteries and their proximal branches with prominent collateral artery formation. They can be found throughout the world and cause irreversible damage to the cerebral hemodynamics due to the progressive nature. Prompt diagnosis and accurate assessment could significantly improve the prognosis of MMD and MMS. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000834DOI Listing
December 2018
10 Reads
1.602 Impact Factor

In Vivo Analysis of Urinary Stones With Dual-Energy Computed Tomography.

J Comput Assist Tomogr 2018 Dec 12. Epub 2018 Dec 12.

Biochemistry, Faculty of Medicine, Selcuk University, Konya, Turkey.

Objective: Formation mechanisms and treatment of the urinary stones are different, depending on their chemical structure. Therefore, determining the stone type plays a key role in planning treatment and preventive measures. Computed tomography (CT), with the use of dual-energy technology in recent years, has made it possible to do in vivo analysis of urinary stones. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000831DOI Listing
December 2018
2 Reads

Ultralow Dose Dynamic Expiratory Computed Tomography for Evaluation of Tracheomalacia.

J Comput Assist Tomogr 2018 Dec 7. Epub 2018 Dec 7.

Northwell Health Thoracic Surgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY.

Objective: The aim of this study was to determine the average effective radiation dose and feasibility of ultralow dose dynamic expiratory computed tomography (CT) for evaluation of tracheomalacia (ULD) and to evaluate factors that impact image quality.

Methods: This is a retrospective study of 64 consecutive patients from September to October 2016 for the evaluation of tracheomalacia. All studies were performed with routine inspiration chest CT followed by ULD z(kilovoltage peak (kVp) 80, 100, or 120 and fixed milliamperage 10) or typical dose CT (TD) (kVp 100 or 120 with automated milliamperage) dynamic expiration CT. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000806DOI Listing
December 2018
1 Read

Diagnostic Value of Contrast-Enhanced Spectral Mammography in Comparison to Magnetic Resonance Imaging in Breast Lesions.

J Comput Assist Tomogr 2018 Dec 7. Epub 2018 Dec 7.

From the Department of Radiology and.

Objective: The aim of this study was to evaluate the diagnostic value between contrast-enhanced spectral mammography (CESM) and breast magnetic resonance imaging (MRI) in breast disease.

Methods: Two hundred thirty-five patients who were suspected of having breast abnormalities by clinical examination or mammography underwent CESM and MRI examination. Using histopathologic results as the criterion standard, the diagnostic performance of CESM and MRI was investigated. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000832DOI Listing
December 2018
6 Reads

Bleeding Meckel Diverticulum: A Retrospective Analysis of Computed Tomography Enterography Findings.

J Comput Assist Tomogr 2018 Dec 10. Epub 2018 Dec 10.

Department of Radiology, Suzhou Hospital, Nanjing Medical University, Suzhou.

Objective: The aim of this study was to evaluate the computed tomography enterography (CTE) characteristics of bleeding Meckel diverticulum.

Methods: The CTE images of 35 patients with Meckel diverticulum and gastrointestinal bleeding were retrospectively evaluated.

Results: Meckel diverticulum was visualized in 33 of 35 patients and located in the right lower abdomen (20/33), midline lower abdomen (8/33), left lower abdomen (3/33), or paramedially near the umbilicus (2/33). Read More

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http://dx.doi.org/10.1097/RCT.0000000000000833DOI Listing
December 2018
6 Reads

Differentiating Transition Zone Cancers From Benign Prostatic Hyperplasia by Histogram Analysis of Apparent Diffusion Coefficient Maps With Standard and Ultrahigh b-value Diffusion-weighted MR Imaging.

J Comput Assist Tomogr 2018 Nov 20. Epub 2018 Nov 20.

Department of Radiology, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.

Objective: To compare the diagnostic performance of standard and ultrahigh b-value Diffusion-weighted Imaging (DWI) using volumetric histogram analysis in differentiating transition zone (TZ) cancer from benign prostatic hyperplasia (BPH).

Methods: 57 TZ cancer and 61 BPH patients received standard (1000 s/mm) and ultrahigh b-value (2000 s/mm) DWI. The diagnostic ability of ADC histogram parameters derived from two DWI for differentiating TZ cancer from BPH was determined by receiver operating characteristic curve. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000829DOI Listing
November 2018
1 Read

Impact Analysis of the Routine Use of Dual-Energy Computed Tomography for Characterization of Incidental Renal Lesions.

J Comput Assist Tomogr 2018 Nov 20. Epub 2018 Nov 20.

From the Departments of Radiology and Emergency Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.

Objective: The aim of this study was to quantify the prevalence of incidental, indeterminate renal lesions on routine contrast-enhanced abdominal computed tomography (CT) and the proportion of such lesions that could be exonerated by dual-energy CT (DECT) postprocessing as benign hyperdense cysts.

Methods: The reports for 2729 consecutive contrast-enhanced DECT scans in the emergency department setting were reviewed for the mention of any renal lesion. For scans with a reported lesion, images were reviewed to assess for the presence of an indeterminate lesion that could not be definitively characterized as benign. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000828DOI Listing
November 2018

Preoperative Parathyroid Imaging: Trends in Utilization and Comparative Accuracy of Sonography, Scintigraphy, and 4-Dimensional Computed Tomography.

Authors:
Manisha Bahl

J Comput Assist Tomogr 2018 Nov 20. Epub 2018 Nov 20.

From the Department of Radiology, Duke University Medical Center, Durham, NC.

Objective: The purposes of this study were to describe trends in parathyroid imaging utilization and to compare the sensitivities of sonography, scintigraphy, and 4-dimensional computed tomography (4DCT) in different imaging algorithms.

Methods: A retrospective review of consecutive patients who underwent parathyroid surgery from 2009 to 2014 was performed. Utilization and accuracy were compared for sonography, scintigraphy, and 4DCT. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000821DOI Listing
November 2018
10 Reads

Coronary Artery Calcium Scoring: Current Status and Review of Literature.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):887-897

From the Johns Hopkins Hospital, Baltimore, MD.

Coronary artery calcium is a marker of overall atherosclerotic plaque burden, corresponding to approximately 20% overall atherosclerotic plaque burden. Coronary artery calcium screening, most commonly performed using the Agatston score, has been shown to be a predictor of future cardiovascular risk independent of conventional risk scores such as the Framingham risk score. Coronary artery calcium screening is also recommended on routine nongated, noncontrast chest computed tomography scans using several ordinal and visual scoring systems. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000825DOI Listing
November 2018
9 Reads

Dynamic Volume Change Rate and Aspect Ratio Are Correlated to the Formation of an Irregular Morphology of Unruptured Intracranial Aneurysm.

J Comput Assist Tomogr 2018 Nov 12. Epub 2018 Nov 12.

From the Departments of Radiology, and.

Objective: The aim of this research was to study the factors influencing the formation of intracranial aneurysms with irregular morphology by observing the dynamic volume change rate of intracranial unruptured aneurysms and other aneurysm characteristics.

Method: Sixty-five unruptured intracranial aneurysms of 51 consecutive patients from 1 center were included in this study. All patients underwent a dual-source computed tomography electrocardiogram-gated 4-dimensional computed tomography angiography examination. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000813DOI Listing
November 2018
7 Reads

Assessing the Relationship Between American Heart Association Atherosclerotic Cardiovascular Disease Risk Score and Coronary Artery Imaging Findings.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):898-905

Department of Medicine, Stanford University School of Medicine.

Objective: The aim of this study was to characterize the relationship between computed tomography angiography imaging characteristics of coronary artery and atherosclerotic cardiovascular disease (ASCVD) score.

Methods: We retrospectively identified all patients who underwent a coronary computed tomography angiography at our institution from December 2013 to July 2016, then we calculated the 10-year ASCVD score. We characterized the relationship between coronary artery imaging findings and ASCVD risk score. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000823DOI Listing
November 2018
18 Reads
1.602 Impact Factor

Introduction to Dual-Energy Computed Tomography.

Authors:
Allen D Elster

J Comput Assist Tomogr 2018 Nov/Dec;42(6):823

From the Department of Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO.

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http://dx.doi.org/10.1097/RCT.0000000000000827DOI Listing
February 2019
8 Reads

Transmural Myocardial Scar Assessed by Cardiac Computed Tomography: Predictor of Echocardiographic Versus Clinical Response to Cardiac Resynchronization Therapy?

J Comput Assist Tomogr 2018 Nov 6. Epub 2018 Nov 6.

Department of Nuclear Medicine & PET Centre, Aarhus University Hospital, Skejby, Aarhus N, Denmark.

Objectives: Before cardiac resynchronization therapy (CRT) implantation, cardiac computed tomography (CT) can provide assessment of cardiac venous anatomy and visualize left ventricular (LV) myocardial scar. We hypothesized that localization and burden of transmural myocardial scar verified by cardiac CT are associated with echocardiographic and clinical response to CRT.

Methods: We prospectively included 140 CRT recipients undergoing preimplant cardiac CT. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000824DOI Listing
November 2018
7 Reads

Phase-Contrast Magnetic Resonance Quantification of Aortic Regurgitation in Patients With Turbulent Aortic Flow.

J Comput Assist Tomogr 2018 Nov 6. Epub 2018 Nov 6.

CS Mott Children's Hospital Ann Arbor, MI.

Objective: This study aimed to assess variability in measurements and accurately quantify aortic regurgitation in patients with coexisting turbulent aortic flow using phase-contrast magnetic resonance.

Methods: All patients (n = 21) underwent phase-contrast magnetic resonance at 2 or more sites: ascending aorta, sinuses of Valsalva, and left ventricular outflow tract. The net flow/minute (NF), forward flow/minute (FF), regurgitant flow/minute (RF), and regurgitant fraction (RF%) were compared with the sum of superior vena cava and descending aortic flow/minute, left ventricular cardiac output, difference between the 2, and percentage difference, respectively. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000819DOI Listing
November 2018
9 Reads

Mixed Imaging on Port-Venous Phase of Contrast-Enhanced Dual-Source Dual-Energy Computed Tomography: A Measurement Method Based on Couinaud Segments.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):944-953

Medical Insurance Bureau, Qingzhou, Shandong, China.

Objective: The aim of this study was to evaluate the changes of the iodine value quantified on the Couinaud segments measured in port-venous phase using the iodine-mixed technique of contrast-enhanced dual-source dual-energy computed tomography (CT) scanning in different Child-Pugh stages of hepatitis B-induced liver cirrhosis.

Methods: Patients clinically diagnosed with hepatitis B-induced cirrhosis were prospectively engaged in our study. Each patient underwent multiphase iodine agent contrast-enhanced dual-source dual-energy CT scanning, and then the iodine-mixed imaging of port-venous phase was postprocessed. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000820DOI Listing
November 2018
7 Reads

Assessment of Liver and Spleen in Children With Gaucher Disease Type 1 With Chemical Shift Imaging.

J Comput Assist Tomogr 2018 Nov 6. Epub 2018 Nov 6.

Department of Pathology, Mansoura Faculty of Medicine, Mansoura, Egypt.

Purpose: The aim of this study was to assess of liver and spleen in children with Gaucher disease type 1 with chemical shift imaging.

Methods: Retrospective analysis was conducted on 36 untreated children with Gaucher disease type 1 and 15 age- and sex-matched control children who underwent chemical shift imaging of the abdomen. The hepatic and splenic fat fraction was calculated. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000817DOI Listing
November 2018
14 Reads
1.602 Impact Factor

Updated Imaging Features of Dysplastic Cerebellar Gangliocytoma.

J Comput Assist Tomogr 2018 Nov 6. Epub 2018 Nov 6.

Division of Neuroradiology, Department of Radiology, Mayo Clinic, Phoenix, AZ.

Objective: The aim of this study was to perform an updated review of the imaging features of dysplastic cerebellar gangliocytoma (DCG).

Methods: Imaging findings were retrospectively reviewed in 14 patients with DCG. The analysis included size, location, cyst formation, calcification, intralesional hemorrhage, enhancement pattern, and apparent diffusion coefficient (ADC). Read More

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http://dx.doi.org/10.1097/RCT.0000000000000814DOI Listing
November 2018
8 Reads

Assessment of Mass Effect Sign at High-Resolution Computed Tomography in Prediction of Cholesteatoma.

J Comput Assist Tomogr 2018 Nov 6. Epub 2018 Nov 6.

Medical Statistics and Biomedical Informatics Department, Medical Research Institute, Alexandria University, Alexandria, Egypt.

Objective: The aim of this study was to assess the accuracy of mass effect sign in the diagnosis of cholesteatoma at high-resolution computed tomography (HRCT).

Methods: This prospective study included 32 ears in 24 patients with chronic otitis media who underwent HRCT of the temporal bone. Otoscopic and operative notes were recorded. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000812DOI Listing
November 2018
9 Reads
1.602 Impact Factor

Diagnostic Value of Quantitative Perfusion Computed Tomography Technique in the Assessment of Tumor Response to Sorafenib in Patients With Advanced Hepatocellular Carcinoma.

J Comput Assist Tomogr 2018 Nov 6. Epub 2018 Nov 6.

Aim: The aim of this study was to assess the role of dynamic contrast-enhanced perfusion computed tomography (pCT) imaging in the early detection of blood flow changes related to antiangiogenic treatment with sorafenib, in patients with advanced hepatocellular carcinoma (HCC), being the modified Response Evaluation Criteria in Solid Tumors (mRECIST) criteria the standard of reference.

Methods: Between 2012 and 2016, 43 cirrhotic patients (male, n = 39; female, n = 4) with biopsy-proven multifocal HCC underwent multi-detector-row computed tomography, and pCT examinations were performed before and every 2 months after sorafenib administration. Perfusion CT technique is based on the acquisition of 16 dynamic slices/scan per 40 scans, performed on a 256-slice multi-detector-row computed tomography scanner, after intravenous bolus injection of 50 mL of iodinated contrast agent (350 mg I/mL) at a flow rate of 5 mL/s. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000807DOI Listing
November 2018
11 Reads

Adaptive Nonlocal Means Method for Denoising Basis Material Images From Dual-Energy Computed Tomography.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):972-981

Electrical and Computer Engineering, University of Massachusetts Lowell, Lowell, MA.

We propose an adaptive nonlocal means approach for image-domain material decomposition in low-dose dual-energy micro-computed tomography. The key idea is to create a distribution map for decomposition error and assign a smooth weight for a given pixel. This method is applied to the decomposed images of 3 basis materials: bone, soft tissue, and gold in our applications. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000805DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6234067PMC
November 2018
3 Reads

Dual-Source Dual-Energy CT Portal Venous Phase Abdominal CT Scans in Large Body Habitus Patients: Preliminary Observations on Image Quality and Material Decomposition.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):932-936

From the Department of Radiology, Massachusetts General Hospital, Boston, MA.

Purpose: Our objective was to evaluate image quality (IQ) and material decomposition in patients with large body habitus undergoing portal venous phase abdominal computed tomography (CT) scans on dual-source dual-energy CT (dsDECT) scanners.

Methods: This retrospective analysis included 30 scans from consecutive patients (19 males/11 females, mean ± SD age = 55.3 ± 17. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000804DOI Listing
November 2018
8 Reads

Spectral Computed Tomography for the Quantitative Assessment of Patients With Carcinoma of the Gastroesophageal Junction: Initial Differentiation Between a Diagnosis of Squamous Cell Carcinoma and Adenocarcinoma.

J Comput Assist Tomogr 2018 Oct 26. Epub 2018 Oct 26.

From the Departments of Radiology.

Objective: This study aimed to distinguish between esophageal squamous cell carcinoma (ESCC) and esophageal adenocarcinoma (EAC) using spectral computed tomography (CT) and to discuss the accuracy according to an optimal threshold of single and combined parameters.

Methods: In this monoinstitution study, 61 patients, 35 of whom had ESCC and 26 had EAC confirmed by surgery or esophagoscopy, were recruited from August 2016 to March 2017. Enrolled patients underwent dual-phase chest CT enhancement. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000826DOI Listing
October 2018
1 Read

Conventional Magnetic Resonance Features for Predicting 1p19q Codeletion Status of World Health Organization Grade II and III Diffuse Gliomas.

J Comput Assist Tomogr 2018 Oct 26. Epub 2018 Oct 26.

The Third Affiliated Hospital of Southern Medical University, Guangdong Province, PR China.

Purpose: The conventional magnetic resonance features of World Health Organization (WHO) grade II and III diffuse gliomas in relation to chromosome 1p and 19q deletions (1p19q codeletion) were analyzed.

Methods: We identified 147 cases of WHO grade II and III diffuse gliomas (1p/19q codeletion, 36 cases; no 1p/19q codeletion, 111 cases). χ Test and univariate and multivariate binary logistic regression analyses were conducted to evaluate the association between the imaging features and 1p19q codeletion status of WHO grade II and III diffuse gliomas in the discovery group, including the WHO grade II and III subgroups. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000816DOI Listing
October 2018
11 Reads

Assessment of Dural Ectasia Using Computed Tomodensitometry as a Criterion in Marfan Syndrome.

J Comput Assist Tomogr 2018 Oct 26. Epub 2018 Oct 26.

Service de Radiologie Centre Hospitalier Lyon sud, Hospices Civils de Lyon, Pierre-Bénite, France.

Objective: The aim of this study was to reevaluate dural ectasia criteria in Marfan syndrome patients fulfilling the revised Ghent criteria.

Methods: Lumbar computed tomography scans of 19 Marfan patients and 30 matched control subjects were retrospectively assessed. Dural sac ratio (DSR), nerve root sleeve diameter, pedicle width, and a scalloping or meningocele presence were each assessed by 2 readers blinded from the diagnosis. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000822DOI Listing
October 2018
14 Reads

Pancreatic Lymphangioma: A Case Report and Literature Review.

J Comput Assist Tomogr 2018 Oct 26. Epub 2018 Oct 26.

Department of Radiology, Thomas Jefferson University School of Medicine, Philadelphia, PA.

We report a case of a 29-year-old woman with a pancreatic lymphangioma who presented clinically as a case of acute pancreatitis. Lymphangiomas are benign tumors of vascular origin with lymphatic differentiation, most commonly found in the head and neck. Pancreatic lymphangiomas are extremely rare, accounting for only 1% of abdominal lymphangiomas, with approximately 60 cases reported in the literature. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000818DOI Listing
October 2018
11 Reads

Quantitative Dual-Energy Computed Tomography Predicts Regional Perfusion Heterogeneity in a Model of Acute Lung Injury.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):866-872

Departamento de Radiologia, LIM-44, Hospital das Clinicas da Faculdade Medicina da universidade de Sao Paulo.

Objective: The aims of this study were to investigate the ability of contrast-enhanced dual-energy computed tomography (DECT) for assessing regional perfusion in a model of acute lung injury, using dynamic first-pass perfusion CT (DynCT) as the criterion standard and to evaluate if changes in lung perfusion caused by prone ventilation are similarly demonstrated by DECT and DynCT.

Methods: This was an institutional review board-approved study, compliant with guidelines for humane care of laboratory animals. A ventilator-induced lung injury protocol was applied to 6 landrace pigs. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000815DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6250290PMC
November 2018
8 Reads

Effect of Virtual Monoenergetic Images From Spectral Detector Computed Tomography on Coronary Calcium Blooming.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):912-918

Objective: The aim of this study was to investigate the quantitative and qualitative effects of virtual monoenergetic images (VMI) by spectral detector computed tomography (SDCT) on calcium blooming in coronary computed tomography angiography.

Methods: Coronary computed tomography angiography using SDCT was performed on 42 patients with coronary artery calcifications. Stenosis grading by diameter and area of calcified plaques and free lumen using VMI from 70 to 140 keV was performed and compared with measurements by conventional images. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000811DOI Listing
November 2018
7 Reads

Iron-Containing Abdominal Pathologies: Exploiting Magnetic Susceptibility Artifact on Dual-Echo Gradient-Echo Magnetic Resonance Imaging.

J Comput Assist Tomogr 2018 Oct 26. Epub 2018 Oct 26.

Department of Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX.

A multitude of pathologic entities involve abnormal iron deposition in the abdomen. These lesions demonstrate decreased signal on longer magnetic resonance sequences with longer echo time due to T2* effect. Dual-echo gradient-echo sequences demonstrate increased susceptibility artifact with longer echo sequences. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000808DOI Listing
October 2018

How to Incorporate Dual-Energy Computed Tomography Into Your Neuroradiology Practice: Questions and Answers.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):824-830

From the Department of Radiology, Wake Forest School of Medicine, Wake Forest Baptist Health, Winston-Salem, NC.

Dual-energy computed tomography (DECT) has many current and evolving applications in neuroradiology including material decomposition, improving conspicuity of iodinated contrast enhancement, and artifact reduction. However, there are multiple challenges in incorporating DECT into practice including hardware selection, postprocessing software requirements, technologist and physician training, and numerous workflow issues. This article reviews in a question-and-answer format common issues that arise when incorporating DECT into a busy neuroradiology practice. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000810DOI Listing
November 2018
8 Reads

Efficacy of the Rotational Traction Method in the Assessment of Glenohumeral Cartilage Surface Area in Computed Tomography Arthrography.

J Comput Assist Tomogr 2018 Oct 26. Epub 2018 Oct 26.

Department of Orthopedics and Traumatology, Medical Faculty, Ataturk University, Erzurum, Turkey.

Objective: We aimed to investigate the efficacy of the rotational traction method in expanding the joint space and enabling the assessment of an extended surface area.

Methods: Sixty patients who underwent computed tomography arthrography were evaluated in the study: 30 with and 30 without the help of rotational traction. The subgroups consisted of patients with adhesive capsulitis, habitual luxation, or labral tears. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000809DOI Listing
October 2018
4 Reads

Incidentally Detected Focal Fundal Gallbladder Wall Thickening at Contrast-Enhanced Computed Tomography: Prevalence and Computed Tomography Features of Malignancy.

J Comput Assist Tomogr 2019 Jan/Feb;43(1):149-154

Department of Public Health Sciences, University of California, Davis, Davis, CA.

Objective: The aim of this study was to determine the prevalence and computed tomography (CT) features of malignancy in incidental focal fundal gallbladder wall thickening.

Methods: Patients with incidental focal fundal gallbladder wall thickening on CT were included if they had an ultrasound or magnetic resonance imaging diagnostic of the etiology (n = 19), stability on CT for 1 year (n = 84), or pathological correlation (n = 13). Morphologies were classified as type 1 (nodular/pinched intramural low attenuation), type 2 (intramural low attenuation), type 3 (homogeneous enhancement), type 4 (nodular/pinched homogeneous enhancement), type 5 (intramural cystic spaces), or type 6 (hyperenhancing/heterogeneous enhancement). Read More

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http://dx.doi.org/10.1097/RCT.0000000000000802DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6331261PMC
January 2019
12 Reads

The Liver Fat Fraction and Abdominal Subcutaneous and Visceral Fat Volume Distribution in Normal-Weight, Overweight, and Obese Children Using a New Magnetic Resonance Imaging Technique.

J Comput Assist Tomogr 2018 Oct 26. Epub 2018 Oct 26.

From the Departments of Radiology and.

Objectives: The purpose of this study was to evaluate liver fat fraction and subcutaneous and visceral fat volumes using new magnetic resonance imaging in normal-weight, overweight, and obese children.

Methods: Patients at below the 85th percentile of body mass index (BMI) z score (5/25 patients) were assigned to the normal-weight group; patients between 85th and 95th percentile of BMI z score (9/25 patients) were assigned to the overweight group, and patients above the 95th percentile of BMI z score (11/25 patients) were assigned to the obese group. Liver fat fraction and subcutaneous and visceral fat volumes were measured on 3-dimensional volume measurement workstation. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000803DOI Listing
October 2018

Heterogeneous Pulmonary Perfusion on Dual-Energy Computed Tomography: Faulty Postprocessing or New Artifact?

J Comput Assist Tomogr 2018 Nov/Dec;42(6):885-886

From the Department of Imaging, Massachusetts General Hospital, Boston, MA.

Iodine uptake in the lungs and intrathoracic lesions on postcontrast dual-energy computed tomography is used for evaluation of pulmonary embolism-related perfusion defects and pulmonary infarctions. It has been applied in characterization and treatment response assessment of lung and mediastinal abnormalities. We report a new imaging artifact or faulty image postprocessing in a commercially available rapid kV switching technique of dual-energy computed tomography, which can confound its clinical utility for evaluation of iodine uptake. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000797DOI Listing
November 2018
2 Reads

Navigating the Pulmonary Perfusion Map: Dual-Energy Computed Tomography in Acute Pulmonary Embolism.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):840-849

From the Departments of Radiology and.

Pulmonary embolism is the third most common acute cardiovascular disease. Dual-energy computed tomography perfusion imaging is a promising adjunct in the detection of acute PE providing simultaneous functional assessment of pulmonary perfusion alongside the high-resolution morphological information from computed tomography pulmonary angiography. We review the evidence to date and common causes of perfusion defects including artifacts, parenchymal, and vascular causes, and discuss its potential in furthering our understanding of physiology and pathophysiology in acute pulmonary embolism. Read More

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http://Insights.ovid.com/crossref?an=00004728-900000000-9918
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http://dx.doi.org/10.1097/RCT.0000000000000801DOI Listing
November 2018
1 Read

Torsional Anatomy of the Lower Limb: The Appearance of Anatomy in Hemispastic Position.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):982-985

Objective: The aim of the study was to determine whether there are relevant anatomical variations to the typical injection sites for antispasticity procedures in the lower limb.

Methods: Sonographic images were obtained at traditional injection locations for spasticity in the lower limb. Images were recorded in neutral and contracted postures. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000795DOI Listing
November 2018
10 Reads

Virtual Monoenergetic Images for Diagnostic Assessment of Hypodense Lesions Within the Liver: Semiautomatic Estimation of Window Settings Using Linear Models.

J Comput Assist Tomogr 2018 Nov/Dec;42(6):925-931

Institute for Diagnostic and Interventional Radiology, University Hospital Cologne, Cologne, Germany.

Objective: The aim of the study was to establish the reference window settings for display of virtual monoenergetic images (VMIs) from spectral detector computed tomography when assessing hypodense liver lesions.

Methods: In patients with cysts (n = 24) or metastases (n = 26), objective (HU, signal-to-noise ratio [SNR]) and subjective (overall image quality, lesion conspicuity and noise) were assessed. Furthermore, 2 readers determined optimal window center/width (C/W) for conventional images (CIs) and VMIs of 40 to 120 keV. Read More

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http://dx.doi.org/10.1097/RCT.0000000000000794DOI Listing
November 2018
7 Reads

Computerized Image Analysis to Differentiate Benign and Malignant Breast Tumors on Magnetic Resonance Diffusion Weighted Image: A Preliminary Study.

J Comput Assist Tomogr 2019 Jan/Feb;43(1):93-97

GE Healthcare, China, Shanghai, PR China.

Purpose: This work aims to determine the feasibility of using a computer-aided diagnosis system to differentiate benign and malignant breast tumors on magnetic resonance diffusion-weighted image (DWI).

Materials And Methods: Institutional review board approval was obtained. This retrospective study included 76 patients who underwent breast magnetic resonance imaging before neoadjuvant chemotherapy from March 10, 2017, to October 12, 2017, with a total of 80 breast tumors including 40 cases of breast cancers and 40 cases of benign breast tumors. Read More

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http://Insights.ovid.com/crossref?an=00004728-900000000-9918
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http://dx.doi.org/10.1097/RCT.0000000000000793DOI Listing
January 2019
3 Reads