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Journal of Computer Assisted Tomography

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https://www.readbyqxmd.com/read/29727309/differences-between-subtalar-instability-and-lateral-ankle-instability-focusing-on-subtalar-ligaments-based-on-three-dimensional-isotropic-magnetic-resonance-imaging
#1
Deuk Young Yoon, Sung Gyu Moon, Hong-Geun Jung, Na Ra Kim
OBJECTIVE: The purpose of this study was to assess the differences between subtalar instability (STI) and lateral ankle instability (LAI) focusing on subtalar ligaments using 3-dimensional (3D) isotropic magnetic resonance imaging (MRI). METHODS: Preoperative MRIs of 10 patients with STI who failed nonoperative treatment and consequently underwent arthroscopic subtalar reconstruction were compared with preoperative MRIs of 23 patients with LAI who underwent ligament repair or reconstruction...
April 28, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29659431/preliminary-study-on-molecular-subtypes-of-breast-cancer-based-on-magnetic-resonance-imaging-texture-analysis
#2
Xinru Sun, Bing He, Xin Luo, Yuhua Li, Jinfeng Cao, Jinlan Wang, Jun Dong, Xiaoyu Sun, Guangxia Zhang
OBJECTIVE: The aim of the study was to investigate the molecular subtypes of breast cancer based on the texture features derived from magnetic resonance images (MRIs). METHODS: One hundred seven patients with preoperative confirmed breast cancer were recruited. One hundred eight breast lesions were divided into 4 subtypes according to the status of estrogen receptor, progesterone receptor, human epidermal growth factor receptor type 2, and Ki67. Fisher discriminant analysis was performed on the texture features that extracted from the enhanced high-resolution T1-weighted images and diffusion weighted images to establish the classification model of molecular subtypes...
April 13, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29659430/risk-factors-associated-with-incomplete-colonoscopy-based-on-the-analysis-of-computed-tomographic-colonography-findings
#3
Eun Sun Lee, Byung Chang Kim, Bo Yun Hur, Min Ju Kim, Hyun Jeong Park, Sung Bin Park, Jong Beum Lee, Dae Kyung Sohn, Kyung Su Han, Chang Won Hong
OBJECTIVE: This study aimed to identify the computed tomographic colonography (CTC) findings of incomplete colonoscopy compared with those of complete colonoscopy. METHODS: The clinical data and CTC imaging data from January 2004 to December 2012 were retrospectively obtained at 2 different institutions and reviewed by the central review system. A total of 71 patients who underwent both videocolonoscopy and CTC were included in this study. The CTC findings and clinical data were evaluated for the completeness of colonoscopy...
April 13, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29659429/spectral-detector-computed-tomography-pulmonary-angiography-improved-diagnostic-assessment-and-automated-estimation-of-window-settings-angiography-of-pulmonary-arteries-from-novel-spectral-detector-computed-tomography-provides-improved-image-quality-if-settings
#4
Nils Große Hokamp, Rivka Kessner, Steven Van Hedent, Frank Philipp Graner, Amit Gupta, Robert Gilkeson
OBJECTIVE: This study aimed to evaluate image quality (IQ) of virtual monoenergetic images (VMIs) from novel spectral detector computed tomography angiography of the pulmonary arteries and to identify appropriate window settings for each kiloelectron volt level. MATERIALS: Forty consecutive patients were included in this institutional review board-approved, Health Insurance Portability and Accountability Act-compliant study.Signal- and contrast-to-noise ratios were calculated within the pulmonary trunk, and pulmonary/lobar/segmental arteries were calculated...
April 13, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29659428/rotator-cuff-tear-morphologic-parameters-at-magnetic-resonance-imaging-relationship-with-muscle-atrophy-and-fatty-infiltration-and-patient-reported-function-and-health-related-quality-of-life
#5
Nathalie J Bureau, Maguy Deslauriers, Marianne Lepage-Saucier, Dominique M Rouleau, André Roy, Patrice Tétreault, Nicola Hagemeister
OBJECTIVE: The aim of this study was to determine the relationship between rotator cuff tear (RCT) morphologic parameters and muscle atrophy and fatty infiltration, and patient-reported outcome measures, in patients with symptomatic full-thickness RCT. METHODS: Rotator cuff tear location, length, width, thickness, and musculotendinous junction position were assessed in 57 magnetic resonance imaging scans and correlated to the outcome measures using multivariate regression analysis...
April 13, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29659427/opportunistic-bone-density-measurement-on-abdomen-and-pelvis-computed-tomography-to-predict-fracture-risk-in-women-aged-50-to-64-years-without-osteoporosis-risk-factors
#6
Jieming Fang, Andrea Franconeri, Johannes Boos, Jennifer Nimhuircheartaigh, Zheng Zhang, Alexander Brook, Olga R Brook
OBJECTIVE: The aim of this study is to evaluate opportunistic vertebral bone density measurement in abdominal and pelvic computed tomography (CT) to predict future osteoporotic fracture in women aged 50 to 64 years without known osteoporosis risk factors. METHODS: Consecutive female patients 50 to 64 years old without osteoporosis risk factors with 2 CT examinations more than 10 years apart were included. Vertebral height and bone density in each vertebra from T10 to L5 were measured...
April 13, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29659426/evaluation-of-virtual-monoenergetic-images-on-pulmonary-vasculature-using-the-dual-layer-detector-based-spectral-computed-tomography
#7
Abed Ghandour, Andrew Sher, Negin Rassouli, Amar Dhanantwari, Prabhakar Rajiah
OBJECTIVE: To evaluate the ability of retrospectively generated virtual monoenergetic images (VMIs) from the detector-based spectral computed tomography (SDCT) to augment pulmonary artery enhancement in CT and if iodine map can predict the optimal monoenergetic level. METHODS: The study included 79 patients with contrast-enhanced chest CT scans on an SDCT scanner. Conventional 120-kVp images and VMI from 40 to 80 keV were generated. Attenuation, noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were measured at 7 different locations in the pulmonary arterial system...
April 13, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29659425/dual-energy-computed-tomography-in-patients-with-small-hepatocellular-carcinoma-utility-of-noise-reduced-monoenergetic-images-for-the-evaluation-of-washout-and-image-quality-in-the-equilibrium-phase
#8
Megumi Matsuda, Takaharu Tsuda, Teruhito Kido, Hiroaki Tanaka, Hikaru Nishiyama, Toshihide Itoh, Kenichi Nakao, Masashi Hirooka, Teruhito Mochizuki
PURPOSE: This study aimed to evaluate the utility of virtual monoenergetic images for detecting washout of small (≤2 cm) hepatocellular carcinoma (HCC) in the equilibrium phase. METHODS: We performed 120-kVp-equivalent linear-blended (M120) and monoenergetic reconstructions from 40 to 90 keV by standard (40, 50, 60, 70, 80, 90) and novel noise-reduced (nMERA: 40+, 50+, 60+, 70+, 80+, 90+) monoenergetic reconstruction algorithms. Image quality and tumor visibility of delayed washout of HCCs in the equilibrium phase were compared between standard monoenergetic reconstruction algorithm and nMERA by objective and subjective analyses...
April 13, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29659424/utility-of-magnetic-resonance-imaging-for-predicting-severity-of-sciatic-nerve-injury
#9
Shivani Ahlawat, Allan J Belzberg, Laura M Fayad
OBJECTIVE: This study aimed to investigate the diagnostic accuracy of magnetic resonance (MR) imaging for categorizing sciatic peripheral nerve injury (PNI) as high-grade (Sunderland grades IV-V) or low-grade (Sunderland grades I-III) PNI. METHODS: In this institutional review board-approved, Health Insurance Portability and Accountability Act-compliant retrospective study, consecutive MR imaging of the pelvis and thighs, performed for the evaluation of traumatic sciatic neuropathy, was reviewed for sciatic nerve signal intensity, size, architectural distortion, bulbous enlargement, perineural fibrosis, discontinuity, and muscle denervation changes...
April 13, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613995/perforation-of-a-peptic-ulcer-in-a-hiatal-hernia-into-the-left-ventricle-with-systemic-air-and-food-embolism
#10
Ikumi Igarashi, Keishi Suzuki, Fumi Hosono, Azusa Ichinose, Shoko Abe, Akira Sugiyama, Yasutomo Sekido
Perforation of a peptic ulcer into the ventricle is uncommon, and the definitive diagnosis is difficult in living patients. We herein report a case of perforation of a peptic ulcer in a hiatal hernia into the left ventricle with systemic air and food embolism. This is the first case report of the perforation diagnosed by computed tomography and confirmed by autopsy. Computed tomography was useful for the diagnosis of perforation into the ventricle.
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613994/evaluation-of-modified-look-locker-inversion-recovery-and-arrhythmia-insensitive-rapid-cardiac-t1-mapping-pulse-sequences-in-cardiomyopathy-patients
#11
Sean Robison, KyungPyo Hong, Daniel Kim, Rachel Lloyd, Jay Ramchand, Emma Hornsey, Piyush Srivastava, Gerard Smith, Leighton Kearney, Ruth Lim
OBJECTIVE: The aim of this study was to compare the performance of arrhythmia-insensitive rapid (AIR) and modified Look-Locker inversion recovery (MOLLI) T1 mapping in patients with cardiomyopathies. METHODS: In 58 patients referred for clinical cardiac magnetic resonance imaging at 1.5 T, we compared MOLLI and AIR native and postcontrast T1 measurements. Two readers independently analyzed myocardial and blood T1 values. Agreement between techniques, interreader agreement per technique, and intrascan agreement per technique were evaluated...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613993/solid-papillary-carcinoma-of-the-breast-magnetic-resonance-mammography-digital-mammography-and-ultrasound-findings
#12
Chao You, Weijun Peng, Xuxia Shen, Wenxiang Zhi, Wentao Yang, Yajia Gu
BACKGROUND: The aim of this study was to investigate the MR mammography (MRM), digital mammography (DM), and ultrasound (US) findings of solid papillary carcinoma (SPC) of breast and to raise awareness of this rare breast tumor. MATERIAL AND METHODS: Thirty patients diagnosed with breast SPC (age range, 21-72; mean age, 60.27 years) from January 2013 to August 2015 were enrolled. Their clinical presentation and MRM, DM, and US findings were retrospectively reviewed...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613992/whole-lesion-apparent-diffusion-coefficient-first-and-second-order-texture-features-for-the-characterization-of-rectal-cancer-pathological-factors
#13
Weifeng Li, Zhuoran Jiang, Yue Guan, Ying Chen, Xiaolin Huang, Song Liu, Jian He, Zhengyang Zhou, Yun Ge
OBJECTIVE: The objective of this study was to explore the value of whole-volume apparent diffusion coefficient (ADC) features in characterizing pathologic features of rectal cancer. METHODS: A total of 50 patients who were diagnosed with rectal cancer via biopsy underwent 3-T pretreatment diffusion-weighted imaging. Apparent diffusion coefficient features, including mean, 10th-90th percentile, Entropy and Entropy(H), derived from whole-lesion volumes were compared between pathologic T1-2 and T3 stages, perineural invasion (PNI) present and absent, lymphangiovascular invasion present and absent, and pathological N0 and N+ stage groups...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613991/imaging-findings-in-papillary-breast-lesions-an-analysis-of-ductal-findings-on-magnetic-resonance-imaging-and-ultrasound
#14
Ozgur Sarica, Murat Dokdok
PURPOSE: This study aims to analyze the imaging features of dilated ducts or ductal extension/relation of masses detected by ultrasound (US) and magnetic resonance imaging (MRI) and to correlate the results obtained through these 2 different imaging methods. Furthermore, the ability of the ductal relation pattern in differentiating benign and malignant lesions was explored. METHODS AND MATERIALS: Magnetic resonance imaging and US findings of 56 patients who had a pathologic diagnosis of papillary lesion were examined...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613990/motion-artifact-reduction-from-high-pitch-dual-source-computed-tomography-pulmonary-angiography
#15
Paul M Bunch, Urvi P Fulwadhva, Jeremy R Wortman, Andrew N Primak, Rachna Madan, Michael L Steigner, Aaron D Sodickson
PURPOSE: The purpose of this study was to compare quantitative and qualitative measures of aortic, cardiac, and respiratory motion artifact between high-pitch dual-source (DS) and single-source (SS) computed tomography pulmonary angiography (CTPA) protocols. METHODS: This institutional review board-approved, Health Insurance Portability and Accountability Act-compliant study retrospectively reviewed 80 non-electrocardiogram-gated CTPA examinations acquired with a second-generation DS system at 100 kVp following 50 mL iodinated contrast injection - 40 consecutive SS and 40 consecutive DS studies...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613989/how-well-does-dual-energy-computed-tomography-with-metal-artifact-reduction-software-improve-image-quality-and-quantify-computed-tomography-number-and-iodine-concentration
#16
Shingo Ohira, Naoyuki Kanayama, Kentaro Wada, Tsukasa Karino, Yuya Nitta, Yoshihiro Ueda, Masayoshi Miyazaki, Masahiko Koizumi, Teruki Teshima
OBJECTIVE: The objective of this study was to assess the accuracy of the quantitative measurements obtained using dual-energy computed tomography with metal artifact reduction software (MARS). METHODS: Dual-energy computed tomography scans (fast kV-switching) are performed on a phantom, by varying the number of metal rods (Ti and Pb) and reference iodine materials. Objective and subjective image analyses are performed on retroreconstructed virtual monochromatic images (VMIs) (VMI at 70 keV)...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613988/dual-energy-computed-tomography-based-iodine-quantitation-for-response-evaluation-of-lung-cancers-to-chemoradiotherapy-radiotherapy-a-comparison-with-fluorine-18-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-based-positron-emission-tomography
#17
Yanping Ren, Yuxin Jiao, Weiqiang Ge, Libo Zhang, Yanqing Hua, Cheng Li, Weihao Zhai, Xi Tang, Wei He, Min Fang, Xiangpeng Zheng
OBJECTIVE: The objective of this study was to investigate the correlation between dual-energy computed tomography (DECT)-based iodine quantitation and fluorine-18 fluorodeoxyglucose (F-FDG) positron emission tomography (PET)/computed tomography (CT) imaging for response evaluation of lung cancers to treatment. METHODS: In this prospective study, a total of 32 pairs of DECT and F-FDG PET/CT imaging acquired consecutively from 13 patients with primary or metastatic lung cancers receiving either radiotherapy alone or chemoradiotherapy were analyzed...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613987/focal-myocardial-damage-in-cardiac-sarcoidosis-characterized-by-strain-analysis-on-magnetic-resonance-tagged-imaging-in-comparison-with-fluorodeoxyglucose-positron-emission-tomography-accumulation-and-magnetic-resonance-late-gadolinium-enhancement
#18
Yoshiaki Watanabe, Tatsuya Nishii, Shinsuke Shimoyama, Tatsuro Ito, Shumpei Mori, Atsushi K Kono, Satoru Takahashi, Ken-Ichi Hirata, Kazuro Sugimura
OBJECTIVE: The aims of this study were to characterize focal myocardial damage of cardiac sarcoidosis by strain analysis and to compare it with late gadolinium enhancement (LGE) and fluorodeoxyglucose (FDG) positron emission tomography. METHODS: We reviewed 208 segments from 13 cardiac sarcoidosis patients and measured the circumferential strain (Ecc) and the strain change per second (Ecc rate). The mean Ecc and Ecc rate values were compared between the FDG(+) and FDG(-), and the LGE(+) and LGE(-) segments using Welch's t test...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613986/malignant-pleural-mesothelioma-are-there-imaging-characteristics-associated-with-different-histologic-subtypes-on-computed-tomography
#19
Joanna G Escalon, Kate A Harrington, Andrew J Plodkowski, Junting Zheng, Marinela Capanu, Marjorie G Zauderer, Valerie W Rusch, Michelle S Ginsberg
OBJECTIVES: Determine imaging characteristics specific to epithelioid (eMPM), sarcomatoid (sMPM), and biphasic (bMPM) subtypes of malignant pleural mesothelioma (MPM) on computed tomography. METHODS: Preoperative computed tomography scans of patients with MPM were retrospectively assessed for numerous features including primary affected side, volume loss, pleural thickness, pleural calcifications, pleural effusion, and lymphadenopathy. RESULTS: One hundred twenty-five patients with MPM were included...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29613985/11c-methionine-positron-emission-tomography-computed-tomography-versus-18f-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-in-evaluation-of-residual-or-recurrent-world-health-organization-grades-ii-and-iii-meningioma-after-treatment
#20
Noriaki Tomura, Toshiyuki Saginoya, Hiromi Goto
OBJECTIVE: The aim of this study was to determine the assessment of positron emission tomography-computed tomography using C-methionine (MET PET/CT) for World Health Organization (WHO) grades II and III meningiomas; MET PET/CT was compared with PET/CT using F-fluorodeoxy glucose (FDG PET/CT). METHODS: This study was performed in 17 cases with residual and/or recurrent WHO grades II and III meningiomas. Two neuroradiologists reviewed both PET/CT scans. For agreement, the κ coefficient was measured...
April 2, 2018: Journal of Computer Assisted Tomography
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