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Journal of Computer Assisted Tomography

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https://www.readbyqxmd.com/read/27893493/improving-detection-of-iron-deposition-in-cirrhotic-liver-using-susceptibility-weighted-imaging-with-emphasis-on-histopathological-correlation
#1
Ruo-Kun Li, Meng-Su Zeng, Fu-Hua Yan, 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...
November 23, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27879529/morphometric-study-of-the-vestibular-aqueduct-in-patients-with-enlarged-vestibular-aqueduct
#2
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...
November 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
#3
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...
November 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
#4
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...
November 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
#5
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...
November 23, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27861200/imaging-of-hereditary-tumors-of-the-female-genital-system
#6
Sarah M Rothan, Christine O Menias, Yehia M ElGuindy, Corey T Jensen, Akram Shaaban, Priya Bhosale, Michelle V Lee, Venkata S Katabathina, Khaled M Elsayes
Cancers of the female genital system, particularly endometrial and ovarian cancers, can be associated with hereditary cancer syndromes such as hereditary breast and ovarian cancer and Lynch syndrome. Cancers that are found in the setting of a hereditary cancer syndrome are often unique in presentation, clinical features, and pathologic profiles when compared with sporadic tumors. This article reviews the hereditary cancer syndromes associated with gynecological malignancies, as well as the imaging findings and staging system of endometrial and ovarian cancers...
November 17, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27861199/heart-rate-reduction-with-adjusted-dose-ivabradine-in-patients-undergoing-coronary-computed-tomographic-angiography-a-randomized-trial
#7
Blaž Kacijan, Zala Novak, Borut Jug, Maja Dolenc Novak, Matjaž Vrtovec, Barbara Gužič Salobir
OBJECTIVE: Our prospective, randomized, open-label study assessed the efficacy of a heart rate-lowering, adjusted-dose protocol with ivabradine prior to coronary computed tomographic angiography (CCTA). METHODS: Patients undergoing CCTA were randomized to 7 days of adjusted-dose ivabradine or standard care (ie, no additional medication). Heart rate and β-blocker and antianxiety medication use on the day of the CCTA were recorded. RESULTS: One hundred one patients were randomized (mean age, 60 [SD, 13] years; 66% women)...
November 17, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27861198/digital-subtraction-of-magnetic-resonance-images-improves-detection-and-characterization-of-pancreatic-neuroendocrine-neoplasms
#8
Riccardo De Robertis, Paolo Tinazzi Martini, Sara Cingarlini, Silvia Ortolani, Giovanni Butturini, Paolo Regi, Luca Landoni, Giampaolo Tortora, Paolo Pederzoli, Mirko D'Onofrio
OBJECTIVE: The aim of this study was to evaluate the usefulness of digital image subtraction of contrast-enhanced magnetic resonance (MR) images for detection and characterization of pancreatic neuroendocrine neoplasms (PanNENs). METHODS: Magnetic resonance examinations of 50 histologically verified PanNENs were retrospectively evaluated by 2 radiologists; 50 ductal adenocarcinomas were included as a control group. Late arterial phase images and correspondent subtracted images were analyzed...
November 17, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27841774/white-paper-of-the-society-of-computed-body-tomography-and-magnetic-resonance-on-dual-energy-ct-part-1-technology-and-terminology
#9
Marilyn J Siegel, Ravi K Kaza, David N Bolus, Daniel T Boll, Neil M Rofsky, Carlo N De Cecco, W Dennis Foley, Desiree E Morgan, U Joseph Schoepf, Dushyant V Sahani, William P Shuman, Terri J Vrtiska, Benjamin M Yeh, Lincoln L Berland
This is the first 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 (DECT). This article, part 1, describes the fundamentals of the physical basis for DECT and the technology of DECT and proposes uniform nomenclature to account for differences in proprietary terms among manufacturers.
November 10, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27841773/the-role-of-computed-tomography-colonography-in-detecting-bowel-involvement-in-women-with-deep-infiltrating-endometriosis-comparison-with-clinical-history-serum-ca125-and-transvaginal-sonography
#10
Silvia Baggio, Alessandro Zecchin, Paola Pomini, Giovanni Zanconato, Michele Genna, Massimiliano Motton, Stefania Montemezzi, Massimo Franchi
OBJECTIVE: We wanted to assess the diagnostic value of computed tomographic colonography (CTC) in recognizing bowel endometriosis in comparison with serum Ca125, transvaginal sonography (TVS), and presence of intestinal symptoms. METHODS: We included in this study 92 women undergoing surgery for symptomatic DIE. Preoperative evaluation included clinical history, Ca125 serum value, and TVS. CTC was performed in 37/92 patients (40.2%), and the results were compared to the other preoperative tools and to surgical exploration, considered the clinical reference standard...
November 10, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27841772/jog-technique-versus-nonspiral-axial-scan-in-pancreatic-perfusion-computed-tomography-imaging-and-their-preliminary-application
#11
Yunjuan Yin, Jianwei Jiang
OBJECTIVE: The aim of this study was to investigate the advantages and disadvantages of JOG technique in pancreatic perfusion computed tomography (CT) imaging. METHODS: First, 40 male patients with nonpancreatic diseases, aged 40 to 60 years, were averagely assigned into 2 groups (A and B). Patients in group A and B underwent nonspiral axial perfusion and JOG technique CT scans of the pancreas, respectively. Second, 23 patients with pancreatic masses were randomly assigned into nonspiral axial scan and JOG groups...
November 10, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824676/the-effect-of-patient-diameter-on-the-dual-energy-ratio-of-selected-contrast-producing-elements
#12
Jack W Lambert, Paul F FitzGerald, Peter M Edic, Yuxin Sun, Peter J Bonitatibus, Robert E Colborn, Benjamin M Yeh
OBJECTIVES: The aim of this study was to assess whether the low- to high-kVp computed tomography (CT) number ratio at dual-energy CT is affected by changes in patient diameter. METHODS: Seven contrast-producing elements were housed sequentially within an abdomen phantom. Fat rings enlarged the phantom diameter from 26 to 44 cm. The phantom was scanned using single-energy CT at tube potentials of 80 and 140 kVp and rapid-kVp-switching dual-energy CT. RESULTS: CT numbers decreased proportionally (~20% CT number reduction for smallest to largest phantom diameters) for low- and high-energy acquisitions but resulted in consistent dual-energy ratios for each contrast element...
November 7, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824675/-fat-brook-in-the-popliteal-fossa-cadaveric-and-clinical-investigation-with-magnetic-resonance-imaging
#13
Yoonah Song, Seunghun Lee, Doo-Jin Paik, Jiyoon Bae
OBJECTIVE: This study aimed to describe the "fat brook" (FB) in the popliteal fossa of a cadaver and to evaluate its clinical significance. METHODS: Ten fresh cadaveric knees underwent magnetic resonance imaging and histologic analyses. In addition, magnetic resonance imaging images from 321 patients (108 men, 213 women; mean age, 49.8 years; age range, 5-92 years) were retrospectively reviewed. Two radiologists independently determined the presence/absence of the FB and internal derangement of the knee...
November 7, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824674/small-bowel-gastrointestinal-stromal-tumors-multidetector-computed-tomography-enhancement-pattern-and-risk-of-progression
#14
Franco Verde, Ralph H Hruban, Elliot K Fishman
OBJECTIVE: Small bowel gastrointestinal stromal tumors (SB-GISTs) are rare lesions with a variable appearance on computed tomography (CT). This case series analyzes the CT enhancement pattern with the histologic risk assessment of tumor progression. METHODS: Local institutional pathology database was searched for SB-GISTs from 2000 to 2015. Pathology reports and clinical notes were reviewed. Imaging was qualitatively reviewed for pattern of enhancement categorized into homogeneous or heterogeneous groups...
November 7, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824673/prognostic-value-of-computed-tomography-detected-extramural-venous-invasion-to-predict-disease-free-survival-in-patients-with-gastric-cancer
#15
Tae Un Kim, Suk Kim, Nam Kyung Lee, Hak Jin Kim, Ga Jin Han, Jun Woo Lee, Hyun Jung Baek, Tae Yong Jeon, Hyun Sung Kim, Do Yoon Park
OBJECTIVE: This study aimed to investigate whether there is a correlation between the computed tomography-detected extramural venous invasion (ctEMVI) and disease-free survival (DFS) in patients with gastric cancer using pathologic lymphovascular invasion as a reference standard. METHODS: We retrospectively reviewed 153 patients with gastric cancer who underwent computed tomography during 1 year. Differences in pathological findings between the ctEMVI-positive and ctEMVI-negative groups were analyzed...
November 7, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824672/the-feasibility-of-dual-energy-computed-tomography-in-cardiac-contusion-imaging-for-mildest-blunt-cardiac-injury
#16
Recep Sade, Mecit Kantarci, Hayri Ogul, Ummugulsum Bayraktutan, Mustafa Uzkeser, Sahin Aslan, Enbiya Aksakal, Necip Becit
PURPOSE: The purpose of this study was to evaluate the efficiency and feasibility of dual-energy computed tomography (DECT) used in the diagnosis of cardiac contusion with the mildest blunt cardiac injury. MATERIAL AND METHODS: This study was performed between February 2014 and September 2015; a total of 17 consecutive patients (10 men and 7 women; median age, 51 years [range: 20-78]) were enrolled in the study. The DECT was performed within 48 hours of the trauma and a subsequent follow-up DECT was performed a little less than 1 year after the first examination...
November 7, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824671/early-changes-of-irradiated-parotid-glands-evaluated-by-t1rho-weighted-imaging-a-pilot-study
#17
Nan Zhou, Chen Chu, Xin Dou, Ming Li, Song Liu, Tingting Guo, Lijing Zhu, Baorui Liu, Weibo Chen, Jian He, Jing Yan, Zhengyang Zhou, Xiaofeng Yang
OBJECTIVE: The aim of the study was to confirm the feasibility of T1rho-weighted imaging to evaluate the dynamic changes of parotid glands in patients with nasopharyngeal carcinoma (NPC) undergoing intensity-modulated radiation therapy. METHODS: Twenty-six NPC patients (19 men; 7 women; mean [SD] age, 48.9 [13.4] years) underwent the following 3 serial T1rho-weighted imaging: within 2 weeks before radiotherapy (RT, pre-RT), 5 weeks after the beginning of RT (mid-RT), and 4 weeks after RT (post-RT)...
November 7, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824670/white-paper-of-the-society-of-computed-body-tomography-and-magnetic-resonance-on-dual-energy-ct-part-4-abdominal-and-pelvic-applications
#18
Carlo N De Cecco, Daniel T Boll, David N Bolus, W Dennis Foley, Ravi K Kaza, Desiree E Morgan, Neil M Rofsky, Dushyant V Sahani, U Joseph Schoepf, William P Shuman, Marilyn J Siegel, Terri J Vrtiska, Benjamin M Yeh, Lincoln L Berland
This is the fourth 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 article, part 4, discusses DECT for abdominal and pelvic applications and, at the end of each, will offer our consensus opinions on the current clinical utility of the application and opportunities for further research.
November 7, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824669/predicting-and-early-monitoring-treatment-efficiency-of-cervical-cancer-under-concurrent-chemoradiotherapy-by-intravoxel-incoherent-motion-magnetic-resonance-imaging
#19
Li Zhu, Lijing Zhu, Huanhuan Wang, Jing Yan, Baorui Liu, Weibo Chen, Jian He, Zhengyang Zhou, Xiaofeng Yang
OBJECTIVE: The aim of this study was to explore the potential of intravoxel incoherent motion magnetic resonance (MR) imaging in predicting and measuring responses to concurrent chemoradiotherapy (CCRT) in advanced cervical cancers. METHODS: Thirty-seven patients with advanced cervical cancers scheduled for CCRT underwent MR examinations including intravoxel incoherent motion sequence with 9 b values (0-800 s/mm) before CCRT, 2 and 4 weeks after the initiation of CCRT, and immediately after CCRT...
November 7, 2016: 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...
November 7, 2016: Journal of Computer Assisted Tomography
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