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Journal of Computer Assisted Tomography

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https://www.readbyqxmd.com/read/30589721/imaging-of-moyamoya-disease-and-moyamoya-syndrome-current-status
#1
Jincheng Li, Meiyu Jin, Xiaoyan Sun, Jingying Li, Yumei Liu, Yanli Xi, Qiang Wang, Wenzhuo Zhao, Yanzhi Huang
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. Some imaging modalities could be used for diagnosis and nonquantitative evaluation of MMD and MMS, such as conventional computed tomography (CT) and magnetic resonance imaging (MRI), digital subtraction angiography, CT angiography (CTA), and magnetic resonance angiography...
December 26, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30540620/in-vivo-analysis-of-urinary-stones-with-dual-energy-computed-tomography
#2
Hasan Erdogan, Osman Temizoz, Mustafa Koplay, Bahadir Ozturk
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. In this study, we aimed to evaluate the diagnostic efficacy of dual-energy CT (DECT) and compare its results with in vitro analysis, which is accepted as a gold standard for analysis of urinary stones...
December 12, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30531229/bleeding-meckel-diverticulum-a-retrospective-analysis-of-computed-tomography-enterography-findings
#3
Ying Chen, Yonghua Tang, Chunhong Hu, Shuangqing Chen
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)...
December 10, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30531547/ultralow-dose-dynamic-expiratory-computed-tomography-for-evaluation-of-tracheomalacia
#4
Stuart L Cohen, Eran Ben-Levi, Jason B Karp, Richard S Lazzaro, Amar Shah, Navid Rahmani, Rakesh D Shah
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...
December 7, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30531546/diagnostic-value-of-contrast-enhanced-spectral-mammography-in-comparison-to-magnetic-resonance-imaging-in-breast-lesions
#5
Dong Xing, Yongbin Lv, Bolin Sun, Haizhu Xie, Jianjun Dong, Cuijuan Hao, Qianqian Chen, Xiaoxiao Chi
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...
December 7, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30475249/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
#6
Zhi-Hua Lu, Li-Biao Ji, Wen-Lu Zhao, Yong-Sheng Zhang, Jiang-Fen Wu, Xin Li, Jun-Kang Shen
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...
November 20, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30475248/impact-analysis-of-the-routine-use-of-dual-energy-computed-tomography-for-characterization-of-incidental-renal-lesions
#7
Jeremy R Wortman, Jeffrey Y Shyu, Urvi P Fulwadhva, Aaron D Sodickson
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...
November 20, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30475247/preoperative-parathyroid-imaging-trends-in-utilization-and-comparative-accuracy-of-sonography-scintigraphy-and-4-dimensional-computed-tomography
#8
Manisha Bahl
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. RESULTS: The study population was composed of 604 patients with 850 adenomas or hyperplastic glands...
November 20, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30422836/dynamic-volume-change-rate-and-aspect-ratio-are-correlated-to-the-formation-of-an-irregular-morphology-of-unruptured-intracranial-aneurysm
#9
Yan Gu, Yonggang Zhang, Meng Luo, Hongwei Zhang, Xiguang Liu, Chongchang Miao
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...
November 12, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30407247/transmural-myocardial-scar-assessed-by-cardiac-computed-tomography-predictor-of-echocardiographic-versus-clinical-response-to-cardiac-resynchronization-therapy
#10
Daniel Benjamin Fyenbo, Anders Sommer, J Tobias Kühl, Klaus F Kofoed, Bjarne L Nørgaard, Mads B Kronborg, Kirsten Bouchelouche, Jens C Nielsen
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. We assessed transmural scar, defined as hypoperfusion involving more than one-half of the myocardial wall in each LV segment using a 17-segment model...
November 6, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30407246/phase-contrast-magnetic-resonance-quantification-of-aortic-regurgitation-in-patients-with-turbulent-aortic-flow
#11
Elizabeth Lee, Blair Richards, Jimmy C Lu, Maryam Ghadimi Mahani, Adam L Dorfman, Sowmya Balasubramanian, Prachi P Agarwal
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...
November 6, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30407244/assessment-of-liver-and-spleen-in-children-with-gaucher-disease-type-1-with-chemical-shift-imaging
#12
Ahmed Abdel Khalek Abdel Razek, Tarik Barakat, Khadiga Ali
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. The Pediatric Gaucher Severity Scoring System, hematologic parameters, and enzyme assay of the disease were calculated and correlated with hepatic and splenic fat fraction...
November 6, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30407243/updated-imaging-features-of-dysplastic-cerebellar-gangliocytoma
#13
Radhika Dhamija, Christopher P Wood, Alyx B Porter, Leland S Hu, Steven M Weindling, Joseph M Hoxworth
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). RESULTS: In addition to revisiting many well-established imaging features of DCG, enhancement was much more common (64...
November 6, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30407242/assessment-of-mass-effect-sign-at-high-resolution-computed-tomography-in-prediction-of-cholesteatoma
#14
Omneya A Gamaleldin, Nermine A Elsebaie, Mohamed Hossameldin Khalifa, Ahmed Abdel Khalek Abdel Razek, Ahmed Mohamed Mehanna, Gihan Mohamed Shehata
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. Image analysis was done both qualitatively and quantitatively. In the qualitative analysis, mass effect was evaluated visually by comparing both ears together in 4 certain anatomical sites...
November 6, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30407241/diagnostic-value-of-quantitative-perfusion-computed-tomography-technique-in-the-assessment-of-tumor-response-to-sorafenib-in-patients-with-advanced-hepatocellular-carcinoma
#15
Davide Ippolito, Giulia Querques, Anna Pecorelli, Cammillo Talei Franzesi, Stefano Okolicsanyi, Mario Strazzabosco, Sandro Sironi
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...
November 6, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30371624/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
#16
Yue Zhou, Ping Hou, Kaiji Zha, Dan Liu, Feng Wang, Kun Zhou, Jianbo Gao
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...
October 26, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30371623/conventional-magnetic-resonance-features-for-predicting-1p19q-codeletion-status-of-world-health-organization-grade-ii-and-iii-diffuse-gliomas
#17
Xiaorong Peng, Chen Yishuang, Zhan Kaizhou, Liqun Xiao, Chunnong Ma
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...
October 26, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30371622/assessment-of-dural-ectasia-using-computed-tomodensitometry-as-a-criterion-in-marfan-syndrome
#18
Quentin Chuzel, Sophie Dupuis-Girod, Matthieu Rousset, Charlotte Decharry, Evelyne Decullier, Jean-Baptiste Pialat
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. Mann-Whitney-Wilcoxon tests compared the patient and control groups...
October 26, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30371621/pancreatic-lymphangioma-a-case-report-and-literature-review
#19
Jay Karajgikar, Sandeep Deshmukh
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. Although imaging findings are characteristic and can point to the diagnosis, confirmation with fine needle aspiration and histopathologic correlation is necessary...
October 26, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/30371618/iron-containing-abdominal-pathologies-exploiting-magnetic-susceptibility-artifact-on-dual-echo-gradient-echo-magnetic-resonance-imaging
#20
Aaron J Thomas, Ajaykumar C Morani, Peter S Liu, William J Weadock, Hero K Hussain, Khaled M Elsayes
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. In this article, the spectrum of iron-containing abdominal pathologies is illustrated, with their characteristic distributions. Included is a brief discussion of the physics of magnetic resonance imaging of iron-containing lesions...
October 26, 2018: Journal of Computer Assisted Tomography
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