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Journal of Computer Assisted Tomography

Mark M Hammer, Jacob C Mandell
Standard computed tomography windows are limited in the thorax because they can only display 1 tissue at a time. Computed tomography window blending allows for simultaneous viewing of all 3 tissues in a single image, which may improve evaluation of diseases that contiguously affect multiple compartments. In this article, we use examples to illustrate the utility of window blending in aggressive infections, metastatic cancer, and penetrating trauma.
September 10, 2018: Journal of Computer Assisted Tomography
Shui-Hua Zhang, Jia-Yun Zhang, Jing Zhang, Wen-Li Chen, Quan Zhou
OBJECTIVE: To study the potential application of magnetic resonance imaging (MRI) for classification of retained placental tissue (RPT) in the uterus postnatally. METHODS: Twenty-two patients with clinically or pathologically proven RPT were studied. RESULTS: The thickness ratio (D1/D2) of invaded (D1) to normal (D2) myometrium could be categorized into 3 groups (>0.6, 0.1-0.6, and <0.1) correlating with the 3 types of RPT: accreta vera (RPA), increta (RPI), and percreta (RPP) (r = -0...
September 10, 2018: Journal of Computer Assisted Tomography
Corey T Jensen, Katherine J Blair, Nicolaus A Wagner-Bartak, Lan N Vu, Brett W Carter, Jia Sun, Tharakeswara K Bathala, Shiva Gupta
OBJECTIVE: This study aimed to evaluate the quality of enhancement and solid-organ lesion depiction using weight-based intravenous (IV) contrast dosing calculated by injector software versus fixed IV contrast dose in oncologic abdominal computed tomographic (CT) examinations. METHODS: This institutional review board-exempt retrospective cohort study included 134 patients who underwent single-phase abdominal CT before and after implementation of weight-based IV contrast injector software...
September 10, 2018: Journal of Computer Assisted Tomography
Dhakshinamoorthy Ganeshan, Behrang Amini, Paul Nikolaidis, Matthew Assing, Raghunandan Vikram
OBJECTIVE: The purpose of this article is to review the etiopathogenesis, molecular cytogenetics, histopathology, clinical features, and multimodality imaging features of desmoid fibromatosis. Recent advances in the management of desmoid fibromatosis will also be discussed. CONCLUSIONS: Desmoid fibromatosis is a rare soft tissue neoplasm with a high incidence of local recurrence. Imaging plays an important role in the diagnosis and management of this disease.
September 10, 2018: Journal of Computer Assisted Tomography
D Anitha, Karupppasamy Subburaj, Felix K Kopp, Kai Mei, Peter Foehr, Rainer Burgkart, Nico Sollmann, Christian Maegerlein, Jan S Kirschke, Peter B Noel, Thomas Baum
Statistical iterative reconstruction (SIR) using multidetector computed tomography (MDCT) is a promising alternative to standard filtered back projection (FBP), because of lower noise generation while maintaining image quality. Hence, we investigated the feasibility of SIR in predicting MDCT-based bone mineral density (BMD) and vertebral bone strength from finite element (FE) analysis. The BMD and FE-predicted bone strength derived from MDCT images reconstructed using standard FBP (FFBP) and SIR with (FSIR) and without regularization (FSIRB0) were validated against experimental failure loads (Fexp)...
September 10, 2018: Journal of Computer Assisted Tomography
James M Debnam, Tzehping L Chi, Leena Ketonen, Wei Wei, Nandita Guha-Thakurta
OBJECTIVE: The objective of this study was to compare multidetector computed tomography (MDCT) images with volume-rendered translucent display (VRTLD) series to plain radiographs for evaluating spinal surgical instrumentation after resection and reconstruction for spinal malignancies. METHODS: In 44 patients with tumor resection and spinal reconstruction, 17 with complications, 3 neuroradiologists evaluated plain radiographs, MDCT images alone, VRTLD images alone, and MDCT images with VRTLD images for identifying complications in 3 categories: subsidence/migration, construct fracture, and screw loosening...
September 10, 2018: Journal of Computer Assisted Tomography
Biqiu Tang, Jiaxin Zeng, Lu Liu, Yuan Xiao, Zhenlin Li, Kai Zhang, Shah Chandan, Youjin Zhao, Zheng Ye, Wenhao Wang, Li He, Su Lui
PURPOSE: The aim of this study was to evaluate the potential value of low-dose multimodal computed tomography (CT) in predicting prognosis of acute ischemic stroke (AIS) within 6 hours. METHODS: The admission "one-stop-shop" multimodal CT examination, including noncontrast CT (NCCT), low-dose CT perfusion, and CT angiography (CTA), was performed in patients with symptoms of stroke within 6 hours. Noncontrast CT, CTA source image (CTA-SI), cerebral blood flow (CBF), cerebral blood volume (CBV), time to peak (TTP), and mean transit time (MTT) maps were studied using Alberta Stroke Program Early CT Score (ASPECTS)...
September 4, 2018: Journal of Computer Assisted Tomography
Mitsuhiro Tsuritani, Yoshiaki Morita, Takekazu Miyoshi, Kenichi Kurosaki, Jun Yoshimatsu
OBJECTIVE: We attempted to evaluate fetal cardiac activity of congenital heart disease (CHD) and normal heart fetuses by magnetic resonance imaging (MRI). METHODS: We evaluated the fetal cardiac functional assessment and the blood flow of descending aorta at 34 weeks' gestation or more by MRI and compared the results with ultrasonography findings. We measured 6 normal heart fetuses and 14 CHD fetuses. RESULTS: The ejection fraction (EF) and descending aorta blood flow in the CHD group were 76...
August 16, 2018: Journal of Computer Assisted Tomography
Lorenzo Mannelli, Serena Monti, Giuseppe Corrias, Maggie M Fung, Charles Nyman, Jennifer S Golia Pernicka, Richard K G Do
RATIONALE AND OBJECTIVES: The purpose of this study is to compare image quality, presence and grade of artifacts, signal-to-noise ratio, and apparent diffusion coefficient (ADC) values in pancreatic tissue between high-resolution navigator-triggered (NT) restricted field of view (rFOV) FOCUS single-shot (SS) echo-planar imaging (EPI) diffusion-weighted imaging (DWI) and NT large FOV SS-EPI DWI. MATERIALS AND METHODS: Magnetic resonance imaging examinations were performed with GE 3-T systems using a 32-channel body array coil...
August 16, 2018: Journal of Computer Assisted Tomography
Christian Booz, Julian L Wichmann, Sabine Boettger, Ahmed Al Kamali, Simon S Martin, Lukas Lenga, Doris Leithner, Moritz H Albrecht, Hanns Ackermann, Thomas J Vogl, Boris Bodelle, Benjamin Kaltenbach
OBJECTIVE: The aim of this study was to investigate a novel version of a computer-aided diagnosis (CAD) system developed for automated bone age (BA) assessment in comparison to the Greulich and Pyle method, regarding its accuracy and the influence of carpal bones on BA assessment. METHODS: Total BA, BA of the left distal radius, and BA of carpal bones in 305 patients were determined independently by 3 blinded radiologists and assessed by the CAD system. Pearson product-moment correlation, Bland-Altman plot, root-mean-square deviation, and further agreement analyses were computed...
August 16, 2018: Journal of Computer Assisted Tomography
Yuhuan Chen, Donghong Wei, Dou Li, Zhentang Liu, Zhijun Hu, Michelle Li, Yongjun Jia, Yong Yu, Dong Han, Ranzhi Ren, Nan Yu, Taiping He
OBJECTIVE: The aim of this study was to investigate radiation dose and image quality of coronary computed tomography (CT) angiography (CCTA) for patients with high heart rate variability (HRv) using 16-cm wide-detector CT scanner. METHODS: One hundred sixty-six patients with uncontrolled heart rate underwent CCTA on a 16-cm wide-detector CT system and were divided into 2 groups based on their HRv for analysis: group A (n = 95, HRv ≤10 beats/min [bpm]) and group B (n = 71, HRv >10 bpm)...
August 16, 2018: Journal of Computer Assisted Tomography
Weibing Wang, Jinbai Huang, Ai Wang, Yun Li, Jie Peng, Xinjie Hu, Yingjun Liu, Haiyan Zhang, Xiaohu Li
OBJECTIVE: The aim of the study was to investigate whether spectral computed tomography (CT) plus adaptive statistical iterative reconstruction (ASIR) could improve imaging quality of computed tomography portal venography (CTPV). METHODS: Sixty-four patients underwent CTPV, with CT number of portal vein (PV) less than 150 HU in portal phase, were divided into 2 groups A (n = 31), using standard 120-kVp protocol. group B (n = 33), using spectral CT protocol. Standard 120-kVp images were reconstructed with 40% ASIR, and monochromatic images at 60 keV were reconstructed with the following 4 ASIR percentages: 0%, 20%, 40%, and 60%...
August 16, 2018: Journal of Computer Assisted Tomography
Temphon Kruamak, Rachael Edwards, Stephanie Cheng, Daniel S Hippe, Ganesh Raghu, Sudhakar N J Pipavath
PURPOSE: The aim of the study was to assess the ability of chest digital tomosynthesis (DTS) for detection of interstitial lung disease (ILD) compared with conventional chest radiography. MATERIALS AND METHODS: We retrospectively reviewed 78 patients (60 males, 18 females, mean age = 53.05 years, range, 19-83 years) who underwent chest DTS for a 5-year interval (January 1, 2009-December 31, 2014). Of the 78 patients, 33 (42.3%) carried a diagnosis of ILD and 45 (57...
August 16, 2018: Journal of Computer Assisted Tomography
Mark M Hammer, Nityanand Miskin, Rachna Madan, Andetta R Hunsaker
OBJECTIVE: We set out to evaluate a set of demographic and computed tomography imaging features for diagnosing anterior mediastinal masses. METHODS: We identified 223 patients with anterior mediastinal masses, which we divided into training and validation sets. One radiologist evaluated computed tomography imaging features on the training set. Then, predictive features were identified, and 3 radiologists evaluated these on the validation set. A naive Bayesian classifier based on the features was compared with the radiologists' first-choice diagnosis...
July 27, 2018: Journal of Computer Assisted Tomography
Jin Woo Han, Kyeong Ah Kim, Hye Yoon Chang, Jeong Woo Kim, Yang Shin Park, Jongmee Lee, Jae Woong Choi, Chang Hee Lee, Cheol Min Park
OBJECTIVE: The aim of this study was to describe magnetic resonance imaging findings of newly categorized ovarian seromucinous tumors. METHODS: We retrospectively reviewed the images of 29 patients with seromucinous tumor for the following factors: size, configuration, signal intensity (SI), and accompanying ovarian endometriosis. RESULTS: Thirty-two tumors (17 benign, 7 borderline, 8 carcinoma) were found on computed tomography or magnetic resonance imaging...
July 27, 2018: Journal of Computer Assisted Tomography
Diana L Lam, Daniel S Hippe, Averi E Kitsch, Savannah C Partridge, Habib Rahbar
OBJECTIVES: The aims of this study were to identify optimal quantitative breast magnetic resonance imaging background parenchymal enhancement (BPE) parameters associated with breast cancer risk and compare performance to qualitative assessments. METHODS: Using a matched case-control cohort of 46 high-risk women who underwent screening magnetic resonance imaging (23 who developed breast cancer matched to 23 who did not), fibroglandular tissue area, BPE area, and intensity metrics (mean, SD, quartiles, skewness, and kurtosis) were quantitatively measured at varying enhancement thresholds...
July 27, 2018: Journal of Computer Assisted Tomography
Dylan N Wolman, Bhavik P Patel, Max Wintermark, Jeremy J Heit
Dual-energy computed tomography (CT) combines the high spatial resolution of standard CT with the ability to improve contrast resolution, reduce artifact, and separate materials of different atomic weights and energy-based attenuation through postprocessing. We review the underlying physical principles and applications of dual-energy CT within the context of patients undergoing preprocedural and postprocedural evaluation for neurointerventional therapies. The broad imaging categories of cerebral ischemia and hemorrhage, head and neck angiography, and the spine are reviewed...
July 27, 2018: Journal of Computer Assisted Tomography
Octavio Arevalo, Roy Riascos, Pejman Rabiei, Arash Kamali, Flavia Nelson
The advent of magnetic resonance imaging has improved our understanding of the pathophysiology and natural course of multiple sclerosis (MS). The ability of magnetic resonance imaging to show the evolution of MS lesions on sequential scans has brought it to be one of the endpoints in clinical trials for disease-modifying therapies. Based on the most updated consensus guidelines from the American (Consortium of MS Centers) and European (Magnetic Resonance Imaging in MS) boards of experts in MS, this document shows the most relevant landmarks related to imaging findings, diagnostic criteria, indications to obtain a magnetic resonance, scan protocols and sequence options for patients with MS...
July 14, 2018: Journal of Computer Assisted Tomography
Haruto Sugawara, Shigeru Suzuki, Yoshiaki Katada, Takuya Ishikawa, Rika Fukui, Yuzo Yamamoto, Osamu Abe
OBJECTIVES: The aim of this study was to compare accuracy of measurement between virtual monochromatic imaging (VMI) in dual-energy computed tomography and conventional polychromatic 120-kVp computed tomographic scan in vascular models containing various densities of contrast material. METHODS: We evaluated measured diameters of 12 models of vessels of 4 inner diameters containing high, intermediate, and low densities of contrast material using software automation...
July 14, 2018: Journal of Computer Assisted Tomography
Dejun She, Zhen Xing, Dairong Cao
OBJECTIVE: The purpose of our study was to evaluate the efficacy of the relative cerebral blood volume (rCBV) gradient in the peritumoral brain zone (PBZ)-the difference in the rCBV values from the area closest to the enhancing lesion to the area closest to the healthy white matter-in differentiating glioblastoma (GB) from solitary brain metastasis (MET). METHODS: A 3.0-T magnetic resonance imaging (MRI) machine was used to perform dynamic susceptibility contrast perfusion MRI (DSC-MRI) on 43 patients with a solitary brain tumor (24 GB, 19 MET)...
July 14, 2018: Journal of Computer Assisted Tomography
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