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CT coronary angiography

Jin Gu, He-Shui Shi, Ping Han, Jie Yu, Gui-Na Ma, Sheng Wu
This study sought to compare the image quality and radiation dose of coronary computed tomography angiography (CCTA) from prospectively triggered 128-slice CT (128-MSCT) versus dual-source 64-slice CT (DSCT). The study was approved by the Medical Ethics Committee at Tongji Medical College of Huazhong University of Science and Technology. Eighty consecutive patients with stable heart rates lower than 70 bpm were enrolled. Forty patients were scanned with 128-MSCT, and the other 40 patients were scanned with DSCT...
October 18, 2016: Scientific Reports
Mohit D Gupta, M P Girish, Sudhansu Sekhar Parida, Sanjay Tyagi
Intercoronary communications (ICC) or open-ended coronary circulation is rare. We describe intercoronary communication in a case of chronic total occlusion, and discuss the pathophysiological and clinical significance of these rare entities. The present case also demonstrates the anatomical presence of ICC despite angiographic absence for the first time using CT coronary angiography.
September 2016: Indian Heart Journal
Sara Gaur, Charles A Taylor, Jesper M Jensen, Hans Erik Bøtker, Evald H Christiansen, Anne K Kaltoft, Niels R Holm, Jonathon Leipsic, Christopher K Zarins, Stephan Achenbach, Sophie Khem, Alan Wilk, Hiram G Bezerra, Jens F Lassen, Bjarne L Nørgaard
OBJECTIVES: This study sought to determine the diagnostic performance of noninvasive fractional flow reserve (FFR) derived from coronary computed tomography angiography (CTA) (FFRCT) for the diagnosis of lesion-specific ischemia in nonculprit vessels of patients with recent in ST-segment elevation myocardial infarction (STEMI). BACKGROUND: In patients with stable angina, FFRCT has high diagnostic performance in identification of ischemia-causing lesions. The potential value of FFRCT for assessment of multivessel disease in patients with recent STEMI has not been evaluated...
October 6, 2016: JACC. Cardiovascular Imaging
Michinobu Nagao, Yuzo Yamasaki, Takeshi Kamitani, Satoshi Kawanami, Masatoshi Kondo, Hiromichi Sonoda, Taisuke Fujioka, Hiroshi Honda
The purpose of this study is to analyze the geometrical characteristics of aortic root and left ventricular (LV) function in aortic stenosis (AS) using 256-slice coronary-computed tomography angiography (CCTA). Retrospective ECG-gated 256-slice CCTA data from 32 patients with tricuspid AS scheduled for aortic valve replacement, and 11 controls were analyzed. Aortic root geometry was measured using multiplanar reconstruction CT images. CCTA data set was transformed into 100 phases/cycle using motion coherence image processing...
October 13, 2016: Heart and Vessels
Lubomir Hadjiiski, Jordan Liu, Heang-Ping Chan, Chuan Zhou, Jun Wei, Aamer Chughtai, Jean Kuriakose, Prachi Agarwal, Ella Kazerooni
The detection of stenotic plaques strongly depends on the quality of the coronary arterial tree imaged with coronary CT angiography (cCTA). However, it is time consuming for the radiologist to select the best-quality vessels from the multiple-phase cCTA for interpretation in clinical practice. We are developing an automated method for selection of the best-quality vessels from coronary arterial trees in multiple-phase cCTA to facilitate radiologist's reading or computerized analysis. Our automated method consists of vessel segmentation, vessel registration, corresponding vessel branch matching, vessel quality measure (VQM) estimation, and automatic selection of best branches based on VQM...
2016: Computational and Mathematical Methods in Medicine
P Laborda-Vidal, B Pedro, M Baker, A R Gelzer, J Dukes-McEwan, T W Maddox
Pulmonic stenosis (PS) is the most common congenital cardiac disease in dogs. Boxers and English bulldogs are among the most commonly affected breeds and also commonly associated with an aberrant coronary artery (CA). If an aberrant CA is suspected and balloon valvuloplasty indicated, an intra-operative angiography is recommended prior to the procedure. ECG-gated computed tomography (CT) can be used to screen for CA anomalies in a quick and minimally-invasive way (preventing side effects associated with selective catheter angiography) and allowing early planning of the procedure...
September 29, 2016: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
Richard A P Takx, Radko Krissak, Christian Fink, Valentin Bachmann, Thomas Henzler, Mathias Meyer, John W Nance, Stefan O Schoenberg, Paul Apfaltrer
OBJECTIVES: To investigate the relationship between image quality and patient size at 100 kilovoltage (kV) compared to 120 kV ECG-gated Triple-Rule-Out CT angiography (TRO-CTA). METHODS: We retrospectively included 73 patients (age 64 ± 14 years) who underwent retrospective ECG-gated chest CTA. 40 patients were scanned with 100 kV while 33 patients with 120 kV. Body mass index (BMI), patients' chest circumference (PC) and thoracic surface area (TSA) were recorded...
September 29, 2016: European Radiology
Chong-Fu Jia, Yi-Nong Jiang, Zhi-Qiang Yang, Xi-Xia Sun, Yang Yu, Hao Wang, Yan Lu, Ai-Jun Chen, Zhao-Qian Wang
BACKGROUND: A new feature of coronary computed tomography angiography (CTA) is to estimate ascending aortic elasticity without additional cost, but its applicable benefit for prehypertension patients is still unclear. The aim of this study is to discuss the characteristic of ascending aortic elasticity for specific prehypertension patients and its risk factors. METHODS: Coronary CTA examinations of 398 participants were performed using a 128 slicer CT scanner. The differences of 3 ascending aortic elasticity related indices, including aortic distensibility (AD), aortic compliance (AC), and aortic stiffness (ASI), and anatomical measurements were analyzed among the normal, prehypertension, and primary hypertension groups...
September 29, 2016: American Journal of Hypertension
Milan Hromádka, Jitka Seidlerová, Jan Baxa, David Suchý, Daniel Rajdl, Jakub Šedivý, Richard Rokyta
BACKGROUND: Rheumatoid arthritis (RA) is a condition associated with accelerated progression of atherosclerosis in affected individuals. Myocardial assessment using exercise testing in such patients, however, is often difficult to perform. Our objective was to determine the factors associated with severe coronary stenosis using computed tomography (CT) angiography of the coronary arteries in asymptomatic patients with RA. METHODS: Forty-four women with RA were examined using CT angiography to detect atherosclerotic involvement and significant coronary stenosis (>50 %)...
September 29, 2016: BMC Cardiovascular Disorders
Stefanie Mangold, Julian L Wichmann, U Joseph Schoepf, Damiano Caruso, Christian Tesche, Daniel H Steinberg, Akos Varga-Szemes, Andrew C Stubenrauch, Richard R Bayer, Matthew Biancalana, Konstantin Nikolaou, Carlo N De Cecco
PURPOSE: To investigate diagnostic accuracy of 3(rd)-generation dual-source CT (DSCT) coronary angiography in obese and non-obese patients. METHODS: We retrospectively analyzed 76 patients who underwent coronary CT angiography (CCTA) and invasive coronary angiography. Prospectively ECG-triggered acquisition was performed with automated tube voltage selection (ATVS). Patients were dichotomized based on body mass index in groups A (<30 kg/m(2), n = 37) and B (≥30 kg/m(2), n = 39) and based on tube voltage in groups C (<120 kV, n = 46) and D (120 kV, n = 30)...
September 28, 2016: European Radiology
Sang-Hong Lee, Jae-Hwan Cho, Hee-Eun Kim, Sung-Chul Kim
OBJECTIVE: This study examined the effect of coronary artery calcification score by lifestyle and correlation with coronary artery stenosis in persons who underwent coronary artery computed tomography (CT) angiography among health examinees for heart diseases in Korea. METHODS AND MATERIALS: The study included 506 subjects (256 men and 250 women) who underwent coronary artery CT angiography among health examines for heart diseases at the Incheon Branch of the Korea Association of Health Promotion between January 2, 2014, and December 31, 2014...
September 27, 2016: Journal of Computer Assisted Tomography
Reza Hanifehpour, Marzieh Motevalli, Hossein Ghanaati, Mona Shahriari, Mounes Aliyari Ghasabeh
BACKGROUND: Coronary artery calcium score (CACS) is a quantitative assessment of calcifications and an established predictor of cardiovascular events. OBJECTIVES: In this study, we evaluated the diagnostic accuracy, negative predictive value (NPV), positive predictive value (PPV), specificity and sensitivity of CACS less than 100 in predicting significant coronary artery stenosis in patients with risk of coronary artery disease (CAD) in a vessel-based analysis. PATIENTS AND METHODS: A cross sectional study was carried out on a study population of 2527 consecutive stable patients with symptoms suggestive of CAD who were referred for coronary computed tomographic angiography (CCTA)...
April 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
R K Funk, M J Blanchard, E E Williamson, P M Young, C H McCollough, A M Tasson, S Leng, N N Laack
No abstract text is available yet for this article.
October 1, 2016: International Journal of Radiation Oncology, Biology, Physics
Ravi T Mathai, Dalia M Fahmy, Hanaa L Sadek, Waleed M Renno
BACKGROUND: Congenital anomalies of the coronary arteries(CAs) are rare and are often diagnosed incidentally during a conventional coronaryangiography. Recently, the incidence of these congenital defects is on the rise particularly after the introduction of the electrocardiography (ECG) gated coronary computed tomographic angiography (CCTA). This innovative radiological screening modality has led to the most precise mapping of the course of the CAs on Computed Tomographic Scan. The aim of the study is to determine the prevalence and describe theCAscongenital anomalies and their variations in Kuwaiti population at a single institution experience...
October 6, 2016: Folia Morphologica (Warsz)
Yuji Iyama, Takeshi Nakaura, Masafumi Kidoh, Seitaro Oda, Daisuke Utsunomiya, Naritsugu Sakaino, Shinichi Tokuyasu, Hirokazu Osakabe, Kazunori Harada, Yasuyuki Yamashita
RATIONALE AND OBJECTIVES: The purpose of this study was to evaluate the noise and image quality of images reconstructed with a knowledge-based iterative model reconstruction (knowledge-based IMR) in ultra-low dose cardiac computed tomography (CT). MATERIALS AND METHODS: We performed submillisievert radiation dose coronary CT angiography on 43 patients. We also performed a phantom study to evaluate the influence of object size with the automatic exposure control phantom...
September 21, 2016: Academic Radiology
Brian B Ghoshhajra, Richard A P Takx, Luke L Stone, Erin E Girard, Emmanouil S Brilakis, William L Lombardi, Robert W Yeh, Farouc A Jaffer
OBJECTIVES: The purpose of this study was to demonstrate the feasibility of real-time fusion of coronary computed tomography angiography (CTA) centreline and arterial wall calcification with x-ray fluoroscopy during chronic total occlusion (CTO) percutaneous coronary intervention (PCI). METHODS: Patients undergoing CTO PCI were prospectively enrolled. Pre-procedural CT scans were integrated with conventional coronary fluoroscopy using prototype software. We enrolled 24 patients who underwent CTO PCI using the prototype CT fusion software, and 24 consecutive CTO PCI patients without CT guidance served as a control group...
September 23, 2016: European Radiology
Aryeh Shalev, Ryo Nakazato, Reza Arsanjani, Rine Nakanishi, Hyung-Bok Park, Yuka Otaki, Victor Y Cheng, Heidi Gransar, Troy M LaBounty, Sean W Hayes, Daniel S Berman, James K Min
RATIONALE AND OBJECTIVES: SYNTAX score is a useful metric determined at the time of invasive coronary angiography (ICA) to assess the complexity of coronary artery disease, and improves prediction of complications at the time of percutaneous complex intervention (PCI). We aimed to determine whether SYNTAX score can be reliably determined from coronary computed tomography angiography (CCTA) and whether a CCTA-derived SYNTAX score can predict complex PCI. MATERIALS AND METHODS: SYNTAX scores were calculated on per-patient, per-vessel, and per-segment basis in 154 consecutive patients who underwent CCTA and ICA...
September 19, 2016: Academic Radiology
L T Burgers, W K Redekop, M J Al, S K Lhachimi, N Armstrong, S Walker, C Rothery, M Westwood, J L Severens
AIMS: New generation dual-source coronary CT (NGCCT) scanners with more than 64 slices were evaluated for patients with (known) or suspected of coronary artery disease (CAD) who are difficult to image: obese, coronary calcium score > 400, arrhythmias, previous revascularization, heart rate > 65 beats per minute, and intolerance of betablocker. A cost-effectiveness analysis of NGCCT compared with invasive coronary angiography (ICA) was performed for these difficult-to-image patients for England and Wales...
September 20, 2016: European Journal of Health Economics: HEPAC: Health Economics in Prevention and Care
Zhongyi Chen, Irina Boldeanu, Simon Nepveu, Madeleine Durand, Anne S Chin, Claude Kauffmann, Samer Mansour, Gilles Soulez, Cécile Tremblay, Carl Chartrand-Lefebvre
BACKGROUND: Coronary computed tomography angiography (CTA) allows the evaluation of coronary plaque volume and low attenuation (lipid-rich) component, for plaque vulnerability assessment. PURPOSE: To determine the effect of iterative reconstruction (IR) on coronary plaque volume and composition. MATERIAL AND METHODS: Consecutive patients without coronary artery disease were prospectively enrolled for 256-slice CT. Images were reconstructed with both filtered back projection (FBP) and a hybrid IR algorithm (iDose(4), Philips) levels 1, 3, 5, and 7...
September 19, 2016: Acta Radiologica
Hatice Kaplanoglu, Osman Beton
AIM: To evaluate the abnormalities and variations of the arterial system of upper extremities and superficial palmar arch with computed tomography angiography and to guide the clinician during this procedure. METHODS: A total of 156 upper extremities of 78 cases were retrospectively analyzed using computed tomography angiography. The study was approved by the local ethics committee of the hospital. From the analysis of the computed tomography angiography images, the following information was recorded; the diameters and abnormalities of radial, ulnar and brachial arteries in both upper extremities, the presence of atherosclerotic changes or stenosis in these arteries, whether the superficial palmar arch was complete or incomplete, and arterial dominance...
September 19, 2016: Surgical and Radiologic Anatomy: SRA
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