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https://www.readbyqxmd.com/read/28528881/impact-of-calcium-score-on-agreement-between-multidetector-computed-tomography-and-invasive-coronary-angiography
#1
José Alberto de Agustín, José Juan Gómez de Diego, Pedro Marcos-Alberca, Patricia Mahía, José Luis Rodrigo, María Luaces, Iván Javier Núñez-Gil, Joaquín Ferreiros, Ana Bustos, Beatriz Cabeza, Miguel Ángel García-Fernández, Carlos Macaya, Leopoldo Pérez de Isla
INTRODUCTION AND OBJECTIVES: Multidetector computed tomography (MDCT) has been demonstrated as a feasible alternative to invasive coronary angiography (ICA). However, contradictory results have been reported regarding the effect of coronary artery calcium score (CS) on the diagnostic accuracy of MDCT. Our aim was to assess the agreement of MDCT and ICA and to evaluate the influence of CS on this agreement. METHODS: We enrolled 266 consecutive patients who underwent evaluation with 64-slice MDCT and ICA...
May 18, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28528853/sarcomatoid-renal-cell-carcinoma-and-collecting-duct-carcinoma-discrimination-from-common-renal-cell-carcinoma-subtypes-and-benign-rcc-mimics-on-multiphasic-mdct
#2
Jonathan R Young, Jocelyn A Young, Daniel J A Margolis, Steven Sauk, James Sayre, Allan J Pantuck, Steven S Raman
RATIONALE AND OBJECTIVES: To investigate whether imaging features on multiphasic multidetector computed tomography (MDCT) can help discriminate sarcomatoid renal cell carcinoma (RCC) and collecting duct carcinoma (CDC) from other solid renal masses. MATERIALS AND METHODS: With institutional review board approval for this HIPAA-compliant study, we derived a cohort of 7 sarcomatoid RCCs, 4 CDCs, 165 clear cell RCCs, 56 papillary RCCs, 22 chromophobe RCCs, 49 oncocytomas, and 16 lipid-poor angiomyolipomas with preoperative multiphasic MDCT with up to four phases (unenhanced, corticomedullary, nephrographic, and excretory)...
May 18, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28523594/the-relationship-between-coronary-artery-calcium-scores-and-left-atrium-size-in-hemodialysis-patients
#3
Ismail Baloglu, Kultigin Turkmen, H Zeki Tonbul, N Yılmaz Selcuk
PURPOSE: Hemodialysis patients have extremely increased cardiovascular mortality. The coronary artery calcification score (CACS) in uremic patients receiving hemodialysis reflects the severity of atherosclerotic vascular disease and predicts the cardiovascular events. In cardiac conditions, left atrial (LA) size has a prognostic importance. In this study, relationship between coronary artery calcification and left atrial size was investigated. METHODS: This was a cross-sectional study involving 32 hemodialysis patients (16 females, 16 males; mean age, 52...
May 18, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28520560/assessing-age-related-change-in-japanese-mental-foramen-opening-direction-using-multidetector-computed-tomography
#4
N Ishii, Y Makino, M Fujita, A Sakuma, S Torimitsu, F Chiba, D Yajima, G Inokuchi, A Motomura, N H Iwase, H Saitoh
OBJECTIVE: The purpose of this study was to investigate how the opening direction of the mental foramen (MF) changes with age in a Japanese population using multi-detector computed tomography (MDCT). METHODS: Post-mortem MDCT scans of 121 Japanese subjects (66 males and 55 females) were carried out where all subjects possessed at least twenty teeth, including molar teeth, in the upper and lower jaws. Two angles of the mental foramen opening were measured, namely the superior-inferior angle in the coronal plane and anterior-posterior angle in the transverse plane, on the CT reconstructed images...
December 1, 2016: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/28512773/natural-history-of-intraductal-papillary-mucinous-neoplasm-and-non-neoplastic-cyst-long-term-imaging-follow-up-study
#5
Yuya Hisada, Naoyoshi Nagata, Koh Imbe, Yusuke Takasaki, Katsunori Sekine, Tsuyoshi Tajima, Mikio Yanase, Kazuma Fujimoto, Junichi Akiyama, Naomi Uemura
Pancreatic cyst is being detected with increasing frequency because of widespread use of sensitive abdominal imaging tests such as multidetector computed tomography (MDCT) and magnetic resonance imaging (MRI) [1, 2]. One study reported an incidental detection rate of 1% on MDCT studies performed for any reason [3]. Not only gastroenterologists, but also other physicians and surgeons, frequently encounter incidental pancreatic cyst. However, it is unclear how often and how long we should follow up patients with pancreatic cyst...
May 17, 2017: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/28510540/diagnosis-of-congenital-coarctation-of-the-aorta-and-accompany-malformations-in-infants-by-multi-detector-computed-tomography-angiography-and-transthoracic-echocardiography-a-chinese-clinical-study
#6
Fang Huang, Qiang Chen, Wen-Han Huang, Hong Wu, Wei-Cheng Li, Qing-Quan Lai
BACKGROUND The purpose of this study was to evaluate the utility of multi-detector computed tomography (MDCT) angiography and transthoracic echocardiography (TTE) in the diagnosis of congenital coarctation of the aorta (CoA) and accompanying malformations in infants. MATERIAL AND METHODS From January 2012 and December 2015, we enrolled 68 infants with clinically suspected CoA who underwent MDCT angiography and TTE in our hospital. Surgical correction was conducted to confirm the diagnostic accuracy of both examinations in all patients...
May 16, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28506939/printed-mdct-3d-models-for-prediction-of-left-atrial-appendage-laa-occluder-device-size-a-feasibility-study
#7
Orly Goitein, Noam Fink, Victor Guetta, Roy Beinart, Yafim Brodov, Eli Konen, David Goitein, Elio Di Segni, Avishay Grupper, Michael Glikson
AIMS: Trans-esophageal echocardiography (TEE) and MDCT currently serve as imaging modalities for left atrial appendage (LAA) occlusion pre-procedural planning. We assessed the feasibility of multi-detector CT (MDCT) based models to predict the correct size of device for LAA occlusion procedures. METHODS AND RESULTS: Patients planned for LAA occlusion underwent MDCT before implantation, which was used for creating and printing 3D LAA models. Three cardiologists evaluated the 3D models and predicted the correct size of the device by manual manipulation, these predictions were compared with the actual device implanted during the procedure...
May 16, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28504543/clear-cell-renal-cell-carcinoma-identifying-the-loss-of-the-y-chromosome-on-multiphasic-mdct
#8
Jonathan R Young, Heidi Coy, Michael Douek, Pechin Lo, James Sayre, Allan J Pantuck, Steven S Raman
OBJECTIVE: The objective of our study was to investigate whether multiphasic MDCT enhancement can help identify clear cell renal cell carcinomas (RCCs) with the loss of the Y chromosome. MATERIALS AND METHODS: We derived a cohort of 43 clear cell RCCs in men who underwent preoperative four-phase renal mass MDCT from October 2000 to August 2013. Each lesion was segmented in its entirety on axial images. A computer-assisted detection algorithm selected a 0.5-cm-diameter region of maximal attenuation within each lesion in each phase...
May 15, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28501911/analysis-of-circumflex-artery-anatomy-by-real-time-3d-transesophageal-echocardiography-compared-to-cardiac-computed-tomography
#9
Carmine Bevilacqua, Sarah Eibel, Borek Foldyna, Thomas Knoefler, Lukas Lehmkuhl, Matthias Gutberlet, Chirojit Mukherjee, Joerg Seeburger, Piroze Davierwala, Joerg Ender
Iatrogenic injury to the circumflex artery (Cx) due to its close proximity to the mitral annulus is a rare but dreadful complication that can occur during mitral valve repair. The aim of our study was to compare multiple measurements of the Cx datasets, obtained by real time three-dimensional transesophageal echocardiography (RT3D TEE) and corresponding measurements assessed in multi-planar three-dimensional images acquired by multidetector computed tomography (MDCT). Preoperative RT3D TEE and MDCT datasets of 25 patients who had previously undergone minimally invasive mitral valve surgery were retrospectively analyzed...
May 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28501271/virtual-cystoscopy-computed-tomography-urography-and-optical-cystoscopy-for-the-detection-and-follow-up-for-bladder-cancer
#10
D Ibáñez Muñoz, I Quintana Martínez, A Fernández Militino, D Sánchez Zalabardo, L Sarria Octavio de Toledo, R Cozcolluela Cabrejas
OBJECTIVES: To evaluate the utility of virtual cystoscopy (VC) performed with CT urography in patients being studied under gross hematuria or patients being followed-up after a previous bladder cancer and compare the results with those obtained with gold standard technique (optical cystoscopy). METHODS: Retrospective study of 117 patients who were referred for VC by the Urology Department between May 2014 and May 2015. Those patients presented with gross hematuria or they were previously treated patients from bladder cancer being followed up...
May 10, 2017: Radiología
https://www.readbyqxmd.com/read/28493071/nontraumatic-large-bowel-perforation-spectrum-of-etiologies-and-ct-findings
#11
REVIEW
Kunal Kothari, Barak Friedman, Gregory M Grimaldi, John J Hines
Large bowel perforation is an abdominal emergency that results from a wide range of etiologies. Computed tomography is the most reliable modality in detecting the site of large bowel perforation. The diagnosis is made by identifying direct CT findings such as extraluminal gas or contrast and discontinuity along the bowel wall. Indirect CT findings can help support the diagnosis, and include bowel wall thickening, pericolic fat stranding, abnormal bowel wall enhancement, abscess, and a feculent collection adjacent to the bowel...
May 10, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28488239/automatic-classification-of-lung-nodules-on-mdct-images-with-the-temporal-subtraction-technique
#12
Yuriko Yoshino, Takahiro Miyajima, Huimin Lu, Jookooi Tan, Hyoungseop Kim, Seiichi Murakami, Takatoshi Aoki, Rie Tachibana, Yasushi Hirano, Shoji Kido
PURPOSE: A temporal subtraction (TS) image is obtained by subtracting a previous image, which is warped to match the structures of the previous image and the related current image. The TS technique removes normal structures and enhances interval changes such as new lesions and substitutes in existing abnormalities from a medical image. However, many artifacts remaining on the TS image can be detected as false positives. METHOD: This paper presents a novel automatic segmentation of lung nodules using the Watershed method, multiscale gradient vector flow snakes and a detection method using the extracted features and classifiers for small lung nodules (20 mm or less)...
May 9, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28488114/a-simple-morphological-classification-to-estimate-the-malignant-potential-of-pancreatic-neuroendocrine-tumors
#13
Atsushi Oba, Atsushi Kudo, Keiichi Akahoshi, Mitsuhiro Kishino, Takumi Akashi, Eriko Katsuta, Yasuhito Iwao, Hiroaki Ono, Yusuke Mitsunori, Daisuke Ban, Shinji Tanaka, Yoshinobu Eishi, Ukihide Tateishi, Minoru Tanabe
BACKGROUND: A novel morphological classification using resected specimens predicted malignant potential and prognosis in patients with pancreatic neuroendocrine tumors (P-NETs). The aim of this study was to examine the predictive ability of morphological diagnoses made using non-invasive multi-detector computed tomography (MDCT) in P-NETs. METHODS: Between 2002 and 2015, 154 patients were diagnosed with P-NETs at the Tokyo Medical and Dental University, and 82 patients who underwent surgical treatment were enrolled...
May 9, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/28487320/aortic-valve-annular-sizing-intraoperative-assessment-versus-preoperative-multidetector-computed-tomography
#14
Isaac George, Laura C Guglielmetti, Nicolas Bettinger, Andrew Moss, Catherine Wang, Nathan Kheysin, Rebecca Hahn, Susheel Kodali, Martin Leon, Vinayak Bapat, Michael A Borger, Mathew Williams, Craig Smith, Omar K Khalique
BACKGROUND: Appropriate valve sizing is critical in aortic valve replacement. We hypothesized that direct intraoperative valve sizing results in smaller aortic annular diameters compared with sizing based on systolic-phase multidetector computerized tomographic (MDCT) imaging. METHODS AND RESULTS: We retrospectively analyzed 78 patients undergoing surgical aortic valve replacement for severe aortic stenosis between 2012 and 2014 at our institution. Preoperative MDCT measurements of the aortic annulus served as basis for assignment to a theoretical surgical valve size, which was then (1) compared to the implanted valve size and (2) to a theoretical transcatheter aortic valve replacement valve size...
May 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28484713/quantitative-aortic-distensibility-measurement-using-ct-in-patients-with-abdominal-aortic-aneurysm-reproducibility-and-clinical-relevance
#15
Yunfei Zha, Gongling Peng, Liang Li, Chunying Yang, Xuesong Lu, Zhoufeng Peng
Purpose. To investigate the reproducibility of aortic distensibility (D) measurement using CT and assess its clinical relevance in patients with infrarenal abdominal aortic aneurysm (AAA). Methods. 54 patients with infrarenal abdominal aortic aneurysm were studied to determine their distensibility by using 64-MDCT. Aortic cross-sectional area changes were determined at two positions of the aorta, immediately below the lowest renal artery (level 1.) and at the level of its maximal diameter (level 2.) by semiautomatic segmentation...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28483640/characterization-of-constitutive-and-acid-induced-outwardly-rectifying-chloride-currents-in-immortalized-mouse-distal-tubular-cells
#16
William C Valinsky, Rhian M Touyz, Alvin Shrier
Thiazides block Na(+) reabsorption while enhancing Ca(2+) reabsorption in the kidney. As previously demonstrated in immortalized mouse DCT (MDCT) cells, chlorothiazide application induced a robust plasma membrane hyperpolarization, which increased Ca(2+) uptake. This essential thiazide-induced hyperpolarization was prevented by the Cl(-) channel inhibitor 5-Nitro-2-(3-phenylpropylamino) benzoic acid (NPPB), implicating NPPB-sensitive Cl(-) channels, however the nature of these Cl(-) channels has been rarely described in the literature...
May 5, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28480123/large-bowel-obstruction-in-the-emergency-department-imaging-spectrum-of-common-and-uncommon-causes
#17
REVIEW
Subramaniyan Ramanathan, Vijayanadh Ojili, Ravi Vassa, Arpit Nagar
Although large bowel obstruction (LBO) is less common than small bowel obstruction, it is associated with high morbidity and mortality due to delayed diagnosis and/or treatment. Plain radiographs are sufficient to diagnose LBO in a majority of patients. However, further evaluation with multidetector computed tomography (MDCT) has become the standard of care to identify the site, severity, and etiology of obstruction. In this comprehensive review, we illustrate the various causes of LBO emphasizing the role of MDCT in the initial diagnosis and detection of complications along with the tips to differentiate from disease which can mimic LBO...
2017: Journal of Clinical Imaging Science
https://www.readbyqxmd.com/read/28479464/embo-evar-a-technique-to-prevent-type-ii-endoleak-a-single-centre-experience
#18
Massimiliano Natrella, Federico Navarretta, Alessandro Rapellino, Gianluca Job, Massimo Cristoferi, Matteo Castagnola, Gianmarco Lunardi, Luca Duc, Gianluca Fanelli, Andrea Peruzzo Cornetto, Teodoro Meloni, Flavio Peinetti
OBJECTIVES: To evaluate the role of intraprocedural aneurysm sac embolisation (embo-EVAR) during endovascular abdominal aneurysm repair (EVAR) using coils and fibrin glue for preventing type II endoleak (EII). MATERIALS AND METHODS: A retrospective clinical case analysis of 72 patients who underwent EVAR during the period 2011-2014. Two groups were compared at 6 and 12 months follow-up with MDCT scan and Contrast-enhanced ultrasound (CEUS) imaging: consecutively, 36 patients (group A) treated with classic EVAR and 36 patients (group B) treated with embo-EVAR...
May 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28471092/anatomical-risk-models-for-paravalvular-leak-and-landing-zone-complications-for-balloon-expandable-transcatheter-aortic-valve-replacement
#19
Jose F Condado, Frank E Corrigan, Stamatios Lerakis, Ioannis Parastatidis, Arthur E Stillman, Jose N Binongo, James Stewart, Kreton Mavromatis, Chandan Devireddy, Bradley Leshnower, Robert Guyton, Jessica Forcillo, Ateet Patel, Vinod H Thourani, Peter C Block, Vasilis Babaliaros
BACKGROUND: Though several anatomical characteristics have been reported separately as risk factors for paravalvular leak (PVL) and landing zone (LZ) complications after transcatheter aortic valve replacement (TAVR), multivariate risk models are needed. METHODS: Patients that underwent balloon-expandable TAVR with multidetector cardiac computed tomography (MDCT) sizing were studied. MDCT images were analyzed and the association between anatomical factors and ≥mild PVL, ≥moderate PVL, and LZ complications (annular rupture, requirement of new permanent pacemaker, and coronary obstruction) was determined, and subsequently competing predictive models were developed and validated...
May 4, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28465718/major-and-ancillary-magnetic-resonance-features-of-li-rads-to-assess-hcc-an-overview-and-update
#20
REVIEW
Vincenza Granata, Roberta Fusco, Antonio Avallone, Orlando Catalano, Francesco Filice, Maddalena Leongito, Raffaele Palaia, Francesco Izzo, Antonella Petrillo
Liver Imaging Reporting and Data System (LI-RADS) is a system for interpreting and reporting of imaging features on multidetector computed tomography (MDCT) and magnetic resonance (MR) studies in patients at risk for hepatocellular carcinoma (HCC). American College of Radiology (ACR) sustained the spread of LI-RADS to homogenizing the interpreting and reporting data of HCC patients. Diagnosis of HCC is due to the presence of major imaging features. Major features are imaging data used to categorize LI-RADS-3, LI-RADS-4, and LI-RADS-5 and include arterial-phase hyperenhancement, tumor diameter, washout appearance, capsule appearance and threshold growth...
2017: Infectious Agents and Cancer
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