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Journal of Computer Assisted Tomography

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https://www.readbyqxmd.com/read/28107213/computed-tomography-in-the-management-of-adrenal-tumors-does-size-still-matter
#1
Saïd C Azoury, Neeraja Nagarajan, Allen Young, Aarti Mathur, Jason D Prescott, Elliot K Fishman, Martha A Zeiger
OBJECTIVE: We sought to evaluate computed tomography (CT) imaging as a predictor of adrenal tumor pathology. METHODS: A retrospective review was conducted of patients who underwent unilateral adrenalectomy for an adrenal mass between January 2005 and July 2015. Tumors were classified as benign, indeterminate, or malignant based on preoperative CT findings. RESULTS: Of 697 patients who underwent unilateral adrenalectomy, 216 met the inclusion criteria...
January 20, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28099226/computed-tomography-in-cystic-fibrosis-combining-low-dose-techniques-and-iterative-reconstruction
#2
Johannes Kahn, David Kaul, Ulrich Grupp, Georg Böning, Diane Renz, Doris Staab, Vera Schreiter, Florian Streitparth
OBJECTIVE: The aim of the study was to evaluate the impact of iterative reconstruction (IR) and low-kilovolt technique on dose reduction and image quality of chest computed tomography scans obtained in patients with cystic fibrosis (CF). METHODS: A total of 124 CF patients were examined; group A (n = 63) was examined with a dose reduction protocol using IR and group B (n = 61) with a standard protocol using filtered back projection. Further subgroups with tube voltage modulations were established...
January 18, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28099225/the-performance-of-noncontrast-magnetic-resonance-angiography-in-detecting-renal-artery-stenosis-as-compared-with-contrast-enhanced-magnetic-resonance-angiography-using-conventional-angiography-as-a-reference
#3
Keng-Wei Liang, Jhih-Wei Chen, Hsin-Hui Huang, Chun-Hung Su, Yeu-Sheng Tyan, Teng-Fu Tsao
OBJECTIVE: The aims of this study were to evaluate the performance of noncontrast magnetic resonance angiography (NC MRA) for detecting renal artery stenosis (RAS) as compared with contrast-enhanced magnetic resonance angiography (CE MRA) and to evaluate the clinical feasibility, technical success rate, and performance of NC MRA for detecting RAS as compared with CE MRA. METHODS: Thirty-six subjects who underwent NC MRA and/or CE MRA were enrolled. Feasibility, technical success rate, and image quality scores were compared...
January 18, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28099224/comparison-of-model-based-iterative-reconstruction-adaptive-statistical-iterative-reconstruction-and-filtered-back-projection-for-detecting-hepatic-metastases-on-submillisievert-low-dose-computed-tomography
#4
Jung Hee Son, Seung Ho Kim, Jung-Hee Yoon, Yedaun Lee, Yun-Jung Lim, Seon-Jeong Kim
OBJECTIVE: The aim of the study was to compare the diagnostic performance of model-based iterative reconstruction (MBIR), adaptive statistical iterative reconstruction (ASIR), and filtered back projection (FBP) on submillisievert low-dose computed tomography (LDCT) for detecting hepatic metastases. METHODS: Thirty-eight patients having hepatic metastases underwent abdomen CT. Computed tomography protocol consisted of routine standard-dose portal venous phase scan (120 kVp) and 90-second delayed low-dose scan (80 kVp)...
January 18, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28099223/median-lingual-lymph-nodes-prevalence-on-imaging-and-potential-implications-for-oral-cavity-cancer-staging
#5
Courtney M Tomblinson, Thomas H Nagel, Leland S Hu, Matthew A Zarka, Joseph M Hoxworth
OBJECTIVE: This study sought to estimate the prevalence of median lingual lymph node (MLLN) metastases from oral cavity squamous cell carcinoma (OCSCC) and determine the frequency with which MLLNs can be identified with magnetic resonance imaging (MRI) in control subjects. METHODS: Pathology reports were used to identify patients with surgically treated OCSCC who underwent preoperative positron emission tomography-computed tomography to define the prevalence of MLLN metastases...
January 18, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28045756/influence-of-age-on-healing-capacity-of-acute-tears-of-the-anterior-cruciate-ligament-based-on-magnetic-resonance-imaging-assessment
#6
Hidetoshi Ihara, Tsutomu Kawano
OBJECTIVE: The purpose of this study was to evaluate the influence of patient age on the effects of conservative treatment of the anterior cruciate ligament (ACL). METHODS: A total of 102 consecutive patients with acute ACL injury were allowed to heal without surgery. Final magnetic resonance imaging images of the ACL were classified from grade I, indicating good morphological recovery, to grade IV, indicating poor recovery. Chi-square analysis was used to determine significant differences in the incidence of grades I and II among those less than 20 versus those 20 years or more of age...
December 29, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27879529/morphometric-study-of-the-vestibular-aqueduct-in-patients-with-enlarged-vestibular-aqueduct
#7
Huiying Lyu, Keguang Chen, Youzhou Xie, Lin Yang, Tianyu Zhang, Peidong Dai
OBJECTIVE: To test whether there are significant differences in the morphologic features of the enlarged vestibular aqueduct (EVA) and its anatomic relationships with adjacent structures between EVA patients with and without other inner ear malformations. METHODS: The morphology of vestibular aqueduct, volume of vestibule, and anatomic location of facial nerve (FN) were compared among 3 groups. Group A, 18 control subjects; group B, 32 EVA patients without other inner ear malformations; group C, 14 EVA patients with other inner ear malformations...
December 23, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27879528/low-tube-voltage-computed-tomography-during-hepatic-arterial-phase-the-effect-of-body-habitus-on-image-quality
#8
Yang Shin Park, Chang Hee Lee, Jongmee Lee, Jae Woong Choi, Kyeong Ah Kim, Cheol Min Park
PURPOSE: This study aimed to evaluate the impact of body habitus factors on image quality of low-tube voltage computed tomography (CT) during the hepatic arterial phase. MATERIALS AND METHODS: Ninety-seven patients (66 men, 31 women; age range, 26-78 years) who underwent clinically indicated liver dynamic CT examination were enrolled in the study. Analysis with 80-kVp CT and intermediate tube current (277-337 mA) was performed in the late hepatic arterial phase using a 320-detector row scanner with adaptive iterative dose reduction 3-dimensional reconstruction...
December 23, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27879527/support-vector-machines-model-of-computed-tomography-for-assessing-lymph-node-metastasis-in-esophageal-cancer-with-neoadjuvant-chemotherapy
#9
Zhi-Long Wang, Zhi-Guo Zhou, Ying Chen, Xiao-Ting Li, Ying-Shi Sun
OBJECTIVE: The aim of this study was to diagnose lymph node metastasis of esophageal cancer by support vector machines model based on computed tomography. MATERIALS AND METHODS: A total of 131 esophageal cancer patients with preoperative chemotherapy and radical surgery were included. Various indicators (tumor thickness, tumor length, tumor CT value, total number of lymph nodes, and long axis and short axis sizes of largest lymph node) on CT images before and after neoadjuvant chemotherapy were recorded...
December 23, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27879526/diagnostic-computed-tomography-coregistration-with-in-111-dtpa-octreotide-single-photon-emission-tomography-low-dose-computed-tomography
#10
Sagi Tshori, Moshe Bocher, Bella Yuzefovich, Rina Rubinstein, David J Gross, Merav Fraenkel, Yodphat Krausz
OBJECTIVES: In-111-DTPA-octreotide (OctreoScan) is still pivotal for neuroendocrine tumor imaging, despite the introduction of Ga-68-octreotide tracers. Low-dose computed tomography (LDCT) assists in the localization of SPECT findings but often results in uncertain interpretation. This retrospective study evaluates the impact of coregistration of In-111-DTPA-octreotide SPECT/LDCT with diagnostic CT on interpretation. METHODS: Thirty-five consecutive studies, in which coregistration was performed because of uncertain interpretation, were evaluated...
December 23, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27997443/automated-infarct-core-volumetry-within-the-hypoperfused-tissue-technical-implementation-and-evaluation
#11
Elias Kellner, Marco Reisert, Valerij G Kiselev, Christoph J Maurer, Lena-Alexandra Beume, Horst Urbach, Karl Egger
OBJECTIVE: The aim of this study was to develop a rapid and fully automatic infarct core and tissue at risk volumetry approach in acute ischemic stroke. METHODS: We evaluated an algorithm in which segmentation was restricted to 1 hemisphere and the potential lesion characterized on the basis of the perfusion parameter Tmax with a region-wise comparison of local histograms to its mirrored counterpart. RESULTS: We applied the "Tmax inside" method to 30 cases of a public data set with ground-truth segmentations for diffusion-weighted and perfusion magnetic resonance imaging...
December 15, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27997442/intrasession-and-intersession-repeatability-of-diffusion-tensor-imaging-in-healthy-human-liver
#12
Oi Lei Wong, Thomas Wai Tong Leung, Gladys Goh Lo, Jing Yuan, Wing Wa Li, Michael D Noseworthy
OBJECTIVE: The aim of this study was to evaluate the effect of signal to noise ratio (SNR) and number of gradient directions (NGD) on intra- and intersession repeatability of liver diffusion tensor imaging (DTI) metrics. METHODS: At each of 3 liver DTI scan sessions, liver diffusion was assessed in 5 healthy volunteers using a 6-direction DTI scan performed 9 separate times (ie, number of signal averages [NSA]). In addition, 4 combinations of NSA and NGD were acquired (NSA/NGD = 1/30, 3/10, 3/12, and 5/6) to determine the combined effect to DTI metrics, which was based on intersubject variability and intrasession (Vintra) and intersession (Vinter) repeatability...
December 15, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27997441/fatal-congenital-retroperitoneal-neuroblastoma-diagnosed-by-fetal-magnetic-resonance-imaging
#13
Elizabeth Snyder, Angie C Jelin, Thierry A G M Huisman, Jody E Hooper, Aylin Tekes
Congenital extra-adrenal neuroblastoma is a rare condition, which typically has a favorable prognosis. We present a unique case of extra-adrenal retroperitoneal neuroblastoma diagnosed by fetal magnetic resonance imaging, which ultimately leads to fetal hydrops and neonatal death.
December 15, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27997440/intravoxel-incoherent-motion-diffusion-weighted-magnetic-resonance-imaging-of-cervical-cancer-with-different-b-values
#14
Qingxia Wu, Yan Wang, Ligang Shi, Li Dong, Mingbo Liu, Shewei Dou, Shaocheng Zhu, Meiyun Wang, Dapeng Shi
OBJECTIVE: The aims of this study were to evaluate the dependence of diffusion parameters on the b values adopted for intravoxel incoherent motion diffusion-weighted magnetic resonance imaging and to investigate the application value of multiple diffusion parameters obtained from monoexponential and biexponential models in subjects with a normal cervix and in cervical cancer patients. METHODS: A total of 120 female patients with cervical cancer and 21 female control subjects with a normal cervix underwent diffusion-weighted magnetic resonance imaging with 13 b values (0-2000 s/mm) at 3 T...
December 15, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27997439/structural-and-functional-correlates-of-myocardial-t1-mapping-in-321-patients-with-hypertrophic-cardiomyopathy
#15
Linda C Chu, Celia P Corona-Villalobos, Marc K Halushka, Yan Zhang, Chiara Pozzessere, Ihab R Kamel, Iraklis Pozios, Rob J Van Der Geest, Neville Gai, Roselle M Abraham, Theodore P Abraham, David A Bluemke, Stefan L Zimmerman
OBJECTIVE: The aim of this study was to evaluate the structural and functional correlates of T1 mapping in 321 patients with hypertrophic cardiomyopathy (HCM). METHODS: Three hundred twenty-one patients with HCM who underwent cardiac magnetic resonance from 2003 to 2013 were retrospectively identified from our institution's HCM registry. Left ventricular volume, function, late gadolinium enhancement (LGE), and Look-Locker T1 time were quantified. T1 time was normalized to blood pool to calculate T1 ratio...
December 15, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27997438/diffusion-weighted-imaging-for-differentiating-uterine-leiomyosarcoma-from-degenerated-leiomyoma
#16
Hai Ming Li, Jia Liu, Jin Wei Qiang, Hao Zhang, Guo Fu Zhang, FengHua Ma
PURPOSE: The study aimed to investigate magnetic resonance diffusion-weighted imaging (DWI) in the differentiation of uterine leiomyosarcoma (ULMS) from degenerated leiomyoma (DLM). METHODS: Sixteen patients with ULMSs and 26 patients with DLMs confirmed by surgery and pathology underwent conventional magnetic resonance imaging and DWI. The mean apparent diffusion coefficient (ADC) values of the 2 groups' tumors were measured and compared using an independent-sample t test (b = 0...
December 15, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28081051/procedure-oriented-torsional-anatomy-of-the-forearm-for-spasticity-injection-erratum
#17
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28081050/white-paper-of-the-society-of-computed-body-tomography-and-magnetic-resonance-on-dual-energy-ct-part-3-vascular-cardiac-pulmonary-and-musculoskeletal-applications
#18
Carlo N De Cecco, U Joseph Schoepf, Lynne Steinbach, Daniel T Boll, W Dennis Foley, Ravi K Kaza, David N Bolus, Desiree E Morgan, Dushyant V Sahani, William P Shuman, Marilyn J Siegel, Terri J Vrtiska, Benjamin M Yeh, Lincoln L Berland
This is the third of a series of 4 white papers that represent Expert Consensus Documents developed by the Society of Computed Body Tomography and Magnetic Resonance through its Task Force on dual-energy computed tomography. This paper, part 3, describes computed tomography angiography and thoracic, cardiac, vascular, and musculoskeletal clinical applications. At the end of the discussion of each application category (vascular, cardiac, pulmonary, and musculoskeletal), we present our consensus opinions on the current clinical utility of the application and opportunities for further research...
January 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28045757/left-colonic-bleeding-secondary-to-inferior-mesenteric-vein-stenosis
#19
Thang Q Le, Donald Romanelli
Lower gastrointestinal bleeding is most commonly associated with diverticulosis, ischemic colitis, vascular ectasia, and anorectal disease and less commonly associated with colonic malignancy. Infrequently, it is associated with mesenteric varices, a rare etiology that is not well documented in the radiology literature. We present a case of a 50-year-old man diagnosed as having intermittent left colonic bleeding from mesenteric varices due to a critical stenosis at the portal vein-inferior mesenteric vein confluence...
January 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27893493/improving-detection-of-iron-deposition-in-cirrhotic-liver-using-susceptibility-weighted-imaging-with-emphasis-on-histopathological-correlation
#20
COMPARATIVE STUDY
Ruo-Kun Li, Meng-Su Zeng, Jin-Wei Qiang, Suzanne L Palmer, Frank Chen, Sheng-Xiang Rao, Ling-Li Chen, Yong-Ming Dai
OBJECTIVE: The aim of this study was to investigate the value of susceptibility-weighted imaging (SWI) for detection and quantification of iron deposition in cirrhotic liver. METHODS: Fifty-five cirrhotic patients underwent hepatic magnetic resonance imaging examination including SWI and multiecho T2*-weighted imaging (T2*WI). Detection of iron deposition and number of siderotic nodules were compared between SWI and T2*WI. Correlation among SWI phase value, T2* value, and hepatic iron concentration were determined...
January 2017: Journal of Computer Assisted Tomography
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