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Journal of Computer Assisted Tomography

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https://www.readbyqxmd.com/read/28394873/effects-of-percutaneous-coronary-intervention-on-viable-myocardium-and-heart-function-of-diabetic-patients-with-chronic-total-occlusion
#1
Guowei Zhou, Wenyi Yang, Liang Li
OBJECTIVE: The aim of this study was to compare the effects of percutaneous coronary intervention (PCI) on coronary chronic total occlusion patients with (DM) or without (NDM) diabetes mellitus. METHODS: A total of 78 patients were divided into DM group and NDM group according to whether the patient has DM. The results of PCI were analyzed using quantitative coronary analysis. In addition, all the patients underwent Tc-MIBI (methoxyisobutylisonitrile) single-photon emission computed tomography (SPECT) and ultrasonic cardiogram in the first week and the sixth month after PCI to evaluate PCI results...
April 7, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28296686/sternal-development-and-variations-and-anomalies-in-patients-with-microtia-evaluation-using-3-dimensional-computed-tomography
#2
MeiRong Yang, Haiyue Jiang, Xiaobo Yu, Weiwei Chen, Qingsong Li, Ye Zhang, Bo Pan
OBJECTIVE: The objectives of this study were to evaluate sternal development and variations in patients with microtia and to identify the incidence of congenital sternal anomalies and then to investigate the interaction between microtia and sternal anomalies. METHODS: A total of 212 consecutive patients received a preoperative 3-dimensional chest computed tomography. A retrospective study was performed with the clinical and imaging data from November 2014 to July 2015...
March 15, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28296685/computed-tomography-perfusion-following-transarterial-chemoembolization-of-hepatocellular-carcinoma-a-feasibility-study-in-the-early-period
#3
Thomas Wimmer, Juergen Steiner, Emina Talakic, Rudolf Stauber, Franz Quehenberger, Rupert Horst Portugaller, Helmut Schoellnast
OBJECTIVES: The aim of this study was to assess the feasibility of computed tomography (CT) perfusion in early follow-up after transarterial chemoembolization (TACE) of hepatocellular carcinoma (HCC). METHODS: Fifteen patients with a total of 16 HCC who were referred to our institution for TACE were included in the study. Computed tomography perfusion was performed within 1 to 3 days before and 4 to 7 days after TACE. Multiphase contrast-enhanced CT was performed 35 (SD, 20) days after TACE...
March 15, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28296684/improved-discrimination-of-myocardial-perfusion-defects-at-low-energy-levels-using-virtual-monochromatic-imaging
#4
Patricia Carrascosa, Alejandro Deviggiano, Macarena de Zan, Carlos Capunay, Roxana Campisi, Gaston A Rodriguez-Granillo
OBJECTIVES: The aim of this study was to explore the diagnostic performance of dual-energy computed tomography perfusion (DE-CTP) at different energy levels. METHODS: Patients with known or suspected coronary artery disease underwent stress and rest DE-CTP and single-photon emission computed tomography. Images were evaluated using monochromatic data, and perfusion defects were initially identified in a qualitative manner and subsequently confirmed using attenuation levels...
March 15, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28296683/preoperative-computed-tomography-assessment-for-perinephric-fat-invasion-comparison-with-pathological-staging
#5
Jaime Landman, Jae Young Park, Chenhui Zhao, Molly Baker, Martin Hofmann, Mohammad Helmy, Chandana Lall, Mari Bozoghlanian, Zhamshid Okhunov
OBJECTIVE: The aim of this study was to assess the accuracy of computed tomography (CT) imaging in diagnosing perinephric fat (PNF) invasion in patients with renal cell carcinoma. METHODS: We retrospectively reviewed the medical records and preoperative CT images of 161 patients (105 men and 56 women) for pT1-pT3a renal cell carcinoma. We analyzed the predictive accuracy of CT criteria for PNF invasion stratified by tumor size. We determined the predictive value of CT findings in diagnosing PNF invasion using logistic regression analysis...
March 15, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28240640/comparison-of-270-versus-320-mg-i-ml-of-iodixanol-in-1-image-assessment-of-both-renal-arteries-and-veins-with-dual-energy-spectral-ct-imaging-in-late-arterial-phase-and-their-influence-on-renal-function
#6
Kefeng Zhou, Jian He, Feng Qu, Haijian Fan, Yi Ma, Tingting Shi, Zhengyang Zhou, Bin Zhu
OBJECTIVE: The objective of this study was to compare the image quality of renal arteries and veins with dual-energy spectral computed tomography (CT) imaging in late arterial phase using 270 and 320 mg I/mL of iodixanol and their influence on renal function. METHODS: A total of 1062 patients underwent renal CT angiography with 270 or 320 mg I/mL of iodixanol with dual-energy spectral CT imaging in late arterial phase. Image quality and their influence on renal function were compared...
February 24, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28240639/diaphragmatic-hernia-after-living-donor-right-hepatectomy-an-important-late-donor-complication
#7
Ji-Won Oh, Soon Nam Oh, Seung Eun Jung, Jae Young Byun
OBJECTIVE: This study was performed to evaluate the incidence and clinical outcome of diaphragmatic hernia after living-donor right hepatectomy. METHODS: Three hundred thirty-six patients (202 men, 134 women; mean age, 37.6 years) who underwent abdominal computed tomography (CT) after right donor hepatectomy were enrolled in this study. The CT images and the electronic medical records were reviewed. We evaluated the associations between diaphragmatic hernia and patient characteristics...
February 24, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28240638/measurement-of-myocardial-extracellular-volume-fraction-from-iodine-density-images-using-single-source-dual-energy-computed-tomography-a-feasibility-study
#8
Yasutoshi Ohta, Shinichiro Kitao, Tomomi Watanabe, Natsuko Mukai, Junichi Kishimoto, Kazuhiro Yamamoto, Toshihide Ogawa
OBJECTIVE: The aims of this study were to develop and validate an iodine density method for the quantification of myocardial extracellular volume (ECV) fraction using single-source, dual-energy computed tomography. METHODS: Extracellular volume measurements were carried out in 40 subjects (20 patients with heart failure, 20 control subjects) using single-source, dual-energy computed tomography. Subtraction-derived ECVs (subECVs) were computed by subtracting precontrast from delayed images...
February 24, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28240637/correlation-between-bile-reflux-gastritis-and-biliary-excreted-contrast-media-in-the-stomach
#9
Jong Jin Hyun, Suk Keu Yeom, Euddeum Shim, Jaehyung Cha, Inyoung Choi, Seung Hwa Lee, Hwan Hoon Chung, Sang Hoon Cha, Chang Hee Lee
OBJECTIVE: This study aimed to evaluate the relationship between biliary excreted contrast media in the stomach and the presence of bile reflux gastritis. METHODS: Consecutive 111 patients who underwent both gadoxetic acid-enhanced magnetic resonance cholangiography (gadoxetic MRC) and gastric endoscopy were included in this study. We performed a review of the gadoxetic-MRC image sets acquired 60 minutes after intravenous injection of contrast media and endoscopic images...
February 24, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28240636/computed-tomography-pulmonary-angiogram-dynamic-parameter-correlation-with-pulmonary-pressure-and-pulmonary-hypertension-etiologies
#10
Yoel Siegel, Drew Bleicher, Michael Kurt Gordon, Debra Fertel
OBJECTIVE: Pulmonary hypertension (PH) is caused by etiologies that differ in pathophysiology. Patients with undiagnosed PH may have a computed tomography pulmonary angiography (CTPA) scan during workup. Static measurements on computed tomography correlate with PH; however, dynamic parameters have received less attention. We studied the correlation between CTPA dynamic parameters and PH and assessed whether these parameters differ among PH etiologies. We also propose a method for PH screening...
February 24, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28240635/comparison-of-the-timing-of-hepatic-arterial-phase-and-image-quality-using-test-bolus-and-bolus-tracking-techniques-in-gadolinium-ethoxybenzyl-diethylenetriamine-pentaacetic-acid-enhanced-hepatic-dynamic-magnetic-resonance-imaging
#11
Yuji Iyama, Takeshi Nakaura, Koichi Yokoyama, Masafumi Kidoh, Daisuke Utsunomiya, Seitaro Oda, Tomohiro Namimoto, Yasuyuki Yamashita
OBJECTIVES: The aim of this study was to compare the image quality, the degree of artifacts and the percentage of timing of the optimal hepatic arterial phase (HAP) between test-bolus and bolus-tracking methods on gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI). METHODS: In this prospective study, 60 patients who underwent 3-dimensional dynamic Gd-EOB-DTPA-enhanced hepatic 3-T MRI were enrolled in this study...
February 24, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28240634/torsed-and-nontorsed-inguinal-undescended-testis-comparison-of-computed-tomography-findings
#12
Eyal Klang, Nadin Kanaan, Michalle Soudack, Yeruham Kleinbaum, Zehava Heiman, Steve Raskin, Marianne Michal Amitai
OBJECTIVE: The aim of this study was to compare the computed tomography imaging features of a torsed inguinal testis with nontorsed inguinal testes. METHODS: Computed tomography scans of patients with undescended testes were retrospectively collected (2011-2016). Imaging features of nontorsed undescended testis were compared with a case of an inguinal torsed testis. Observations included location of the undescended testis, size (length × width) and texture of each testis, peritesticular findings, position of testicular vessels, and enhancement patterns...
February 24, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28240633/efficacy-and-clinical-utility-of-a-high-attenuation-object-artifact-reduction-algorithm-in-flat-detector-image-reconstruction-compared-with-standard-image-reconstruction
#13
Claas P Naehle, Lukas Hechelhammer, Heiko Richter, Fabian Ryffel, Simon Wildermuth, Johannes Weber
OBJECTIVE: To evaluate the effectiveness and clinical utility of a metal artifact reduction (MAR) image reconstruction algorithm for the reduction of high-attenuation object (HAO)-related image artifacts. METHODS: Images were quantitatively evaluated for image noise (noiseSD and noiserange) and qualitatively for artifact severity, gray-white-matter delineation, and diagnostic confidence with conventional reconstruction and after applying a MAR algorithm. RESULTS: Metal artifact reduction reduces noiseSD and noiserange (median [interquartile range]) at the level of HAO in 1-cm distance compared with conventional reconstruction (noiseSD: 60...
February 24, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28288481/pleural-metastasis-in-head-and-neck-cancer-imaging-findings-and-clinical-impact
#14
Bing Wang, Sonia Betancourt Cuellar, Lawrence E Ginsberg
OBJECTIVE: The aim of this study was to present the imaging findings of pleural metastases from head and neck cancer and correlate them with prognosis for overall survival, which to our knowledge have not received much attention in radiology literature. METHODS: We reviewed 23 cases of head and neck cancer with pleural metastases that were seen on head and neck imaging. Computed tomography (CT), magnetic resonance imaging, and positron emission tomography/CT imaging findings were reviewed...
March 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28288480/the-effect-of-heart-rate-on-exposure-window-and-best-phase-for-stress-perfusion-computed-tomography-lessons-from-the-core320-study
#15
MULTICENTER STUDY
Chloe Steveson, Joanne D Schuijf, Andrea L Vavere, Richard T Mather, Teresa Caton, Vishal Mehra, Aisha Betoko, Christopher Cox, Joao Ac Lima, Richard T George
OBJECTIVES: The aim of this study is to evaluate the effect of heart rate on exposure window, best phase, and image quality for stress computed tomography perfusion (CTP) in the CORE320 study. METHODS: The CTP data sets were analyzed to determine the best phase for perfusion analysis. A predefined exposure window covering 75% to 95% of the R-R cycle was used. RESULTS: Of the 368 patients included in the analysis, 93% received oral β blockade before the rest scan...
March 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28230569/procedure-oriented-torsional-anatomy-of-the-hand-for-spasticity-injection
#16
Joslyn John, John Cianca, Faye Chiou-Tan, Sindhu Pandit, Erin Furr-Stimming, Katherine H Taber
OBJECTIVES: To provide musculoskeletal ultrasound (MSKUS) images of hand anatomy in the position of hemiparetic flexion as a reference for spasticity injections. After a stroke, spasticity can result in anatomic distortion of the hand. Spasticity may require treatment with botulinum toxin or phenol injections. Anatomic distortion may decrease the accuracy of injections. Standard anatomic references are of limited utility because they are not in this spastic hemiparetic position. There presently is no anatomic reference in the literature for these spastic postures...
March 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28230568/obesity-hepatic-steatosis-and-their-impact-on-fat-infiltration-of-the-trunk-musculature-using-unenhanced-computed-tomography
#17
Ronnie Sebro
OBJECTIVES: The aim of the study was to assess whether hepatic steatosis predicts muscle fat content independent of body mass index (BMI). METHODS: Regions of interest were drawn over several trunk muscles and over the right lobe of the liver to obtain the computed tomography (CT) density in 100 subjects with unenhanced CT studies of the abdomen and pelvis. Univariate and multivariate linear regression were used to examine the associations between BMI and hepatic steatosis and between BMI and trunk muscle density...
March 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28230567/magnetic-resonance-imaging-features-of-solitary-hypothalamitis
#18
Hua Zhang, Jing Wang, Yue Wu, Ying Tang, Ran Tao, Hongying Ye, Zhenwei Yao
OBJECTIVE: The study aimed to characterize magnetic resonance imaging (MRI) findings of solitary hypothalamitis and evaluate their clinical value in diagnosis. METHODS: Magnetic resonance imaging scans, including T1-weighted imaging (T1WI), T2-weighted imaging (T2WI), and contrast-enhanced T1-weighted sequences, of 8 biopsy-proven hypothalamitis lesions were retrospectively analyzed along with MRI features including size, shape, signal intensity, enhancement pattern, correlation with adjacent tissues, and changes in infundibular stalk and sella turcica...
March 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
#19
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...
March 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824668/computed-tomography-guided-tumor-ablation-analysis-and-optimization-of-computed-tomography-technique-with-various-ablation-devices
#20
Adam E M Eltorai, Grayson L Baird, Nicholas Monu, Darren Bialo, Scott Collins, Jeom Soon Kim, Damian E Dupuy
PURPOSE: Ablation device-associated computed tomography beam hardening artifacts can make tumor margin visualization and its relationship to the ablation applicator tip challenging. Determine optimal scanning conditions for currently-used applicators. MATERIALS AND METHODS: Eleven applicators were placed in ex vivo cow livers with implanted mock tumors, surrounded by bolus gel. Various computed tomography scans were performed at 440 mA with 5 mm thickness changing kVp (80, 100, 120, 140), scan time (0...
March 2017: Journal of Computer Assisted Tomography
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