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Journal of Computer Assisted Tomography

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https://www.readbyqxmd.com/read/28481810/application-and-indication-of-carcinoembryonic-antigen-triggered-18f-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-scanning-in-the-detection-of-relapse-of-colorectal-cancer-patients-after-curative-therapy
#1
Xiaozhou Yu, Lei Zhu, Dong Dai, Xiuyu Song, Wei Chen, Yanjia Zhu, Xiaofeng Li, Wengui Xu
OBJECTIVE: This study aimed to explore the characteristics of patients with colorectal cancer (CRC) following curative therapy that may benefit from fluorine-18-2-uoro-2-deoxy-D-glucose positron emission tomography/computed tomography (F-FDG PET/CT) scanning, evaluate the application of carcinoembryonic antigen (CEA)-triggered F-FDG PET/CT scanning, and provide referential indicators. METHODS: This retrospective study included 56 CRC patients who received a PET/CT scan as a primary examination because of rising CEA levels after curative therapy and who had not received any other radiological examinations previously...
May 6, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28481809/vessel-masked-perfusion-magnetic-resonance-imaging-with-histogram-analysis-improves-diagnostic-accuracy-for-the-grading-of-glioma
#2
Atsuko Arisawa, Yoshiyuki Watanabe, Hisashi Tanaka, Hiroto Takahashi, Chisato Matsuo, Takuya Fujiwara, Yasunori Fujimoto, Kouji Yamamoto, Noriyuki Tomiyama
OBJECTIVE: Dynamic susceptibility contrast magnetic resonance imaging is widely used to assess glioma grade; histogram analyses are used for precise tumor perfusion evaluations. We evaluated the effect of vessel contamination in normalized cerebral blood volume (nCBV) to differentiate high- and low-grade gliomas. METHODS: Thirty-four patients with gliomas underwent dynamic susceptibility contrast magnetic resonance imaging. Both traditional and vessel-masked nCBV maps were constructed...
May 6, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28481808/intraluminal-uterine-hypodensity-in-ct-scans-of-postmenopausal-women-recommendations-for-interpretation
#3
Michal Marianne Amitai, Mohamad Yassin, Nayrouz Kanana, Sara Apter, Noa Rozendorn, Eli Konen, Eyal Klang
OBJECTIVE: This study aims to investigate the association between intraluminal uterine hypodensity and uterine malignancy and establish thresholds that would minimize routine gynecological evaluation. METHODS: Two groups were recruited retrospectively: cancer group, which comprised 32 sequential endometrial cancer patients, and postmenopausal group, which comprised 63 women, with no known gynecologic malignancy.Two radiologists independently measured hypodensity, transversely in the axial plane and anterioposteriorly in the sagittal plane...
May 6, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28481807/maximum-arterial-contrast-concentrations-with-computed-tomography-and-left-ventriculography-implications-for-contrast-nephrotoxicity-risk
#4
Nicholas M Gutierrez, Jeffrey H Newhouse
PURPOSE: Contrast nephropathy occurs more frequently after cardiac angiography, which usually includes left ventriculography via direct left ventricular injection, than after contrast-enhanced computed tomography (CT), despite the usually higher intravenous contrast dose used for CT. To determine whether maximum renal arterial contrast concentration is higher after left ventriculography, we assessed this parameter for both procedures. MATERIALS AND METHODS: Contrast concentration in abdominal aortic blood during contrast-enhanced CT was measured by performing CT densitometry of aortic blood before contrast, and in the arterial phase, in 100 adults undergoing abdominal CT...
May 6, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28481806/the-association-of-intracranial-vascular-calcification-and-stenosis-with-acute-ischemic-cerebrovascular-events
#5
Brendan Quiney, Stephen M Ying, Daniel S Hippe, Niranjan Balu, Alfonso R Urdaneta-Moncada, Mahmud Mosa-Basha
OBJECTIVE: The aim of this article was to evaluate the association of intracranial artery calcification (IAC) with acute downstream ischemic stroke (dAIS)/transient ischemic attack while considering stenosis. METHODS: Consecutive stroke computed tomography angiography head/neck examinations from January 2010 to April 2010 were reviewed. Per-vessel IAC and stenosis of greater than or equal to 30% were documented by 2 neuroradiologists. Associations between calcification and dAIS were assessed using multivariate logistic regression, controlling for traditional risk factors and stenosis...
May 6, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28481805/interreader-reliability-and-clinical-validity-of-a-magnetic-resonance-imaging-grading-system-for-cervical-foraminal-stenosis
#6
Jung Eun Lee, Hee Jin Park, So Yeon Lee, Yong Taek Lee, Yong Bum Kim, Kyu Hong Lee, Hyunchul Shin, Young Joon Kwon
OBJECTIVE: Park system is a magnetic resonance imaging (MRI) grading system for cervical neural foraminal stenosis (CNFS) and consists of 4 grades (0-3) based on the foraminal shape of 45-degree T2-weighted oblique sagittal images. The objective of this study was to evaluate the interreader reliability of the Park system among radiologists, residents, and clinicians. This study also assessed the correlations between radiologic and clinical findings. MATERIAL AND METHODS: A total of 289 patients (men:women = 155:134, mean age = 50 years) who underwent oblique sagittal MRI of the cervical spine at our hospital were included...
May 6, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28481804/computed-tomography-in-the-diagnosis-of-classical-trigeminal-neuralgia
#7
Victor A Baliazin, Elena V Baliazina, Daniil P Aksenov
OBJECTIVE: This study aims to characterize the pathogenesis of neurovascular conflict in trigeminal neuralgia (TN) with the goal of producing a reliable diagnostic method. METHODS: Data were obtained during microvascular decompression surgery. The normal relationship between the superior cerebellar artery (SCA) and the trigeminal nerve root also was characterized in postmortem cases. Furthermore, SCA was imaged with high-resolution computed tomography angiography...
May 6, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28471869/low-energy-virtual-monochromatic-dual-energy-computed-tomography-images-for-the-evaluation-of-head-and-neck-squamous-cell-carcinoma-a-study-of-tumor-visibility-compared-with-single-energy-computed-tomography-and-user-acceptance
#8
Reza Forghani, Hillary Kelly, Eugene Yu, Manon Belair, Laurent Létourneau-Guillon, Huy Le, Francesca Proulx, Thomas Ong, Xianming Tan, Hugh D Curtin, Mark Levental
OBJECTIVE: Dual-energy computed tomography (CT) 40-keV virtual monochromatic images (VMIs) have been reported to improve visualization of head and neck squamous cell carcinoma, but a direct comparison to single-energy CT (SECT) is lacking, and there is debate regarding subjective user preference. We compared 40-keV VMIs with SECT and performed a subjective evaluation of their utility and acceptability for clinical use. METHODS: A total of 60 dual-energy CT and 60 SECT scans from 2 different institutions were evaluated...
May 2, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448423/dual-energy-ct-balance-between-iodine-attenuation-and-artifact-reduction-for-the-evaluation-of-head-and-neck-cancer
#9
Jaykumar R Nair, François DeBlois, Thomas Ong, Slobodan Devic, Nada Tomic, Hamed Bekerat, Lorne Rosenbloom, Khalil Sultanem, Reza Forghani
OBJECTIVE: Dual-energy computed tomography high energy virtual monochromatic images (VMIs) can reduce artifact but suppress iodine attenuation in enhancing tumor. We investigated this trade-off to identify VMI(s) that strike the best balance between iodine detection and artifact reduction. METHODS: The study was performed using an Alderson radiation therapy phantom. Different iodine solutions (based on estimated tumor iodine content in situ using dual-energy computed tomography material decomposition) and different dental fillings were investigated...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448422/iterative-reconstruction-designed-for-brain-ct-a-correlative-study-with-filtered-back-projection-for-the-diagnosis-of-acute-ischemic-stroke
#10
Yuji Iyama, Takeshi Nakaura, Seitaro Oda, Masafumi Kidoh, Daisuke Utsunomiya, Morikatsu Yoshida, Hideaki Yuki, Kenichiro Hirata, Yoshinori Funama, Kazunori Harada, Kazuo Awai, Toshinori Hirai, Yasuyuki Yamashita
OBJECTIVES: The objective of this study is to evaluate the usefulness of iterative model reconstruction designed for brain computed tomography (CT) (IMR-Neuro) for the diagnosis of acute ischemic stroke. METHODS: This retrospective study included 20 patients with acute middle cerebral artery infarction who have undergone brain CT and 20 nonstroke patients (control). We reconstructed axial images with filtered back projection (FBP) and IMR-Neuro (slice thickness, 1 and 5 mm)...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448421/multislice-computed-tomography-assessment-of-tracheobronchial-patterns-in-partial-anomalous-left-pulmonary-artery
#11
Shi-Yu Wang, Wei Gao, Yu-Min Zhong, Ai-Min Sun, Qian Wang, Li-Wei Hu, Hai-Sheng Qiu, Jian-Ying Li, Richard B Jaffe
OBJECTIVE: The aim of this study was to present relationship between partial anomalous left pulmonary artery (PALPA) and the tracheobronchial tree and patterns of the tracheobronchial tree assessed by multislice computed tomography (MSCT). METHODS: Nine patients were assessed by MSCT. The relationships between the tracheobronchial tree and PALPA and different tracheobronchial patterns, location of tracheobronchial stenosis, severity of stenosis, and associated cardiac defects were evaluated...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448420/inflow-angle-of-small-paraophthalmic-aneurysms-is-a-determinant-of-adjacent-sphenoid-bone-remodeling
#12
Gianni Giancaspro, Thierry Gagné, Donatella Tampieri, Maria DelPilar Cortes
OBJECTIVE: Large internal carotid artery aneurysms can cause remodeling of the sphenoid bone with subsequent hemorrhage into the sinus. No reports have demonstrated small unruptured lesions causing similar bone remodeling. The purpose of this study was to demonstrate our experience with small unruptured paraophthalmic aneurysms causing sphenoid bone remodeling, specifically when the optimal aneurysm inflow angle is present. METHODS: We searched our database for computed tomography angiography studies of small paraophthalmic aneurysms and assessed adjacent sphenoid bone remodeling and inflow angle...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448419/venous-sinus-thrombosis-in-blunt-trauma-incidence-and-risk-factors
#13
Shira E Slasky, Yayone Rivaud, Matthew Suberlak, Oluwole Tairu, Adam D Fox, Pamela Ohman-Strickland, Esther Bilinisky
PURPOSE: The aim of our study was to determine the incidence and risk factors of dural venous sinus thrombosis and epidural hemorrhage in the setting of a blunt trauma causing a calvarial fracture crossing a dural venous sinus. METHODS: A retrospective review of 472 blunt trauma patients with calvarial fracture crossing a dural venous sinus was performed. Two hundred ten patients who underwent computed tomography venography were identified and evaluated for the presence of dural venous sinus thrombosis and/or epidural hemorrhage...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448418/effects-of-b-value-on-quantification-of-rapid-diffusion-kurtosis-imaging-in-normal-and-acute-ischemic-brain-tissues
#14
Ming-Chung Chou, Cheng-Wen Ko, Yu-Hsien Chiu, Hsiao-Wen Chung, Ping-Hong Lai
PURPOSE: Diffusion kurtosis imaging (DKI) has been widely used to characterize brain tissue alterations. Diffusion-weighting factor or b value plays an important role in the measurement of rapid DKI and may have influential effects on them. The purpose of this study was to investigate the effects of b value on rapid DKI indices in normal and acute ischemic brain tissues. MATERIALS AND METHODS: This study enrolled 10 healthy subjects and 4 acute ischemic stroke patients...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448417/electrocardiography-gated-computed-tomography-of-the-bronchial-arteries-with-iterative-image-reconstruction-clinical-evaluation-and-image-quality
#15
Qiangqiang Gang, Jun Xu, Junling Wang, Peng Hao, Yikai Xu
BACKGROUND: The aim of this study was to apply electrocardiography (ECG)-gated prospective-triggered multidetector row computed tomography angiography with iterative model reconstruction (IMR) to optimize imaging of the bronchial arteries in patients with the chief complaint of hemoptysis. METHODS: This was a prospective observational study. Between August 2015 and June 2016, we enrolled 31 consecutive patients with the chief complaint of hemoptysis who were scheduled to undergo computed tomography of the bronchial artery...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448416/analysis-of-a-steerable-needle-for-fine-needle-aspiration-and-biopsy-efficiency-and-radiation-dose-compared-with-a-conventional-straight-needle
#16
Sandra Rutigliano, John A Abraham, Barry E Kenneally, Adam C Zoga, Mika Nevalainen, Johannes B Roedl
PURPOSE: Percutaneous computed tomography (CT)-guided needle biopsy has proven to be an efficacious method for sampling of many soft tissue lesions, especially deep-seated masses in the abdomen and pelvis. This study sought to test the potential for a novel steerable needle to improve localization and to reduce procedure duration and radiation dose compared with a conventional straight needle. MATERIAL AND METHODS: A fresh, raw meat sample (lean bovine flank) was imbedded with cylindrical radiopaque and radiolucent obstacles designed to simulate vessels (radiolucent objects) and bones (radiopaque objects) on CT...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448415/investigation-on-computed-tomography-features-of-primary-thymic-atypical-carcinoid-tumors
#17
Xiaojing Kan, Pengming Wang, Zhiquan Gong, Feifei Gao, Yuxia Zhang, Yinghui Ge
OBJECTIVES: The thymic atypical carcinoid tumors (aTCs) are rare. The computed tomography (CT) features of aTC were poorly studied, and researches under this topic with large samples are in a small quantity in the literature. Our aim was to investigate the CT features of aTC. METHODS: Eleven cases of aTC (7 men and 4 women; mean age, 56 ± 16 years) proved by pathology were retrospectively analyzed. All the patients underwent contrast-enhanced CT scans with dual phase (25-30 and 60-70 seconds) after contrast agent injection...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448414/computed-tomography-features-of-benign-and-malignant-calcified-thyroid-nodules-a-single-center-study
#18
Donghyun Kim, Dong Wook Kim, Young Jin Heo, Jin Wook Baek, Yoo Jin Lee, Young Mi Park, Hye Jin Baek, Soo Jin Jung
OBJECTIVE: No previous studies have investigated thyroid calcification on computed tomography (CT) quantitatively by using Hounsfield unit (HU) values. This study aimed to analyze quantitative HU values of thyroid calcification on preoperative neck CT and to assess the characteristics of benign and malignant calcified thyroid nodules (CTNs). MATERIALS AND METHODS: Two hundred twenty patients who underwent neck CT before thyroid surgery from January 2015 to June 2016 were included...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448413/the-application-of-iodine-quantitative-information-obtained-by-dual-source-dual-energy-computed-tomography-on-chemoradiotherapy-effect-monitoring-for-cervical-cancer-a-preliminary-study
#19
Changqin Jiang, Pin Yang, Junqiang Lei, Jinkui Li, Kun Yan, Feilong Li, Ruifeng Yan, Lichao Xia
OBJECTIVE: The aim of the study is to investigate the potential contribution of the iodine quantitative parameters of dual-phase dual-energy computed tomography (DECT) scanning for chemoradiotherapy (CRT) response monitoring for cervical cancer. METHODS: Patients who were pathologically certified having cervical cancer and intended for concurrent radiotherapy and chemotherapy were prospectively included in our study. Contrast-enhanced DECT scanning was performed before CRT, which was repeated after 1 month of therapy, using a dual-source CT scanner onset...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448412/optimizing-contrast-media-injection-protocols-in-computed-tomography-angiography-at-different-tube-voltages-evaluation-in-a-circulation-phantom
#20
Damiano Caruso, Marwen Eid, U Joseph Schoepf, Domenico De Santis, Akos Varga-Szemes, Stefanie Mangold, Christian Canstein, Virginia W Lesslie, Stephen R Fuller, B Devon Ball, Andrea Laghi, Carlo N De Cecco
OBJECTIVES: The aim of this study was to investigate the minimum iodine delivery rate (IDR) and contrast media (CM) volume required for diagnostic contrast enhancement of 350 HU (Hounsfield units) in the ascending aorta at different kV settings. METHODS: Dynamic computed tomography acquisitions from 70 to 150 kV were performed in a circulation phantom. First, injections with IDR ranging from 0.1 to 2.0 g I/s were tested for each kV. In the second part, the IDR was held constant, whereas the CM volume was reduced from 50 to 10 mL...
April 26, 2017: Journal of Computer Assisted Tomography
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