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Coronary CTA

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https://www.readbyqxmd.com/read/28089233/epicardial-adipose-tissue-and-myocardial-ischemia-assessed-by-computed-tomography-perfusion-imaging-and-invasive-fractional-flow-reserve
#1
Rahul G Muthalaly, Nitesh Nerlekar, Dennis T L Wong, James D Cameron, Sujith K Seneviratne, Brian S Ko
BACKGROUND: Epicardial adipose tissue (EAT) is a metabolically active fat depot that is associated with incident coronary artery disease (CAD) and major adverse cardiovascular events. The relationship between EAT and myocardial ischemia remains unclear. This study investigated the relationship between EAT volume and the presence of perfusion defects on myocardial computed tomographic perfusion imaging (CTP) and functional stenoses on invasive fractional flow-reserve (FFR). METHODS: Data were obtained from a previous prospective cross-sectional study in patients with suspected CAD...
December 30, 2016: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28065380/iterative-model-reconstruction-reduces-calcified-plaque-volume-in-coronary-ct-angiography
#2
Mihály Károlyi, Bálint Szilveszter, Márton Kolossváry, Richard A P Takx, Csilla Celeng, Andrea Bartykowszki, Ádám L Jermendy, Alexisz Panajotu, Júlia Karády, Rolf Raaijmakers, Walter Giepmans, Béla Merkely, Pál Maurovich-Horvat
OBJECTIVE: To assess the impact of iterative model reconstruction (IMR) on calcified plaque quantification as compared to filtered back projection reconstruction (FBP) and hybrid iterative reconstruction (HIR) in coronary computed tomography angiography (CTA). METHODS: Raw image data of 52 patients who underwent 256-slice CTA were reconstructed with IMR, HIR and FBP. We evaluated qualitative, quantitative image quality parameters and quantified calcified and partially calcified plaque volumes using automated software...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28048867/mo-ab-bra-10-super-high-temporal-resolution-cardiac-ct-imaging-using-smart-recon
#3
Y Li, X Cao, Z Xing, X Sun, J Hsieh, G Chen
PURPOSE: Coronary CT angiography is a challenging task currently limited by the achievable temporal resolution of modern MDCT scanners. In this work, a highly innovative method has been developed and validated to improve temporal resolution of the MDCT by a factor of four with the newly developed SMART-RECON method to enable high quality coronary CTA exams. The primary purpose of this paper is to investigate the relationships between: (1) SMART-RECON and the motion pattern; (2) SMART-RECON and the average speed of moving vessels; (3) SMART-RECON and the position and direction of moving vessels...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048492/th-cd-206-07-determination-of-patient-specific-myocardial-mass-at-risk-using-computed-tomography-angiography
#4
L Hubbard, B Ziemer, S Malkasian, J Lipinski, B Sadeghi, H Javan, B Dertli, E Groves, S Molloi
PURPOSE: To evaluate the accuracy of a patient-specific coronary perfusion territory assignment algorithm that uses CT angiography (CTA) and a minimum-cost-path approach to assign coronary perfusion territories on a voxel-by-voxel basis for determination of myocardial mass at risk. METHODS: Intravenous (IV) contrast (370 mg/mL iodine, 25 mL, 7 mL/s) was injected centrally into five swine (35-45 kg) and CTA was performed using a 320-slice CT scanner at 100 kVp and 200 mA...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047154/su-f-t-405-development-of-a-rapid-cardiac-contouring-tool-using-landmark-driven-modeling
#5
C Pelletier, E Mosher, C Lee, C Lee, J Jung
PURPOSE: This study aims to develop a tool to rapidly delineate cardiac substructures for use in dosimetry for large-scale clinical trial or epidemiological investigations. The goal is to produce a system that can semi-automatically delineate nine cardiac structures to a reasonable accuracy within a couple of minutes. METHODS: The cardiac contouring tool employs a Most Similar Atlas method, where a selection criterion is used to pre-select the most similar model to the patient from a library of pre-defined atlases...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28027760/ct-angiography-for-planning-transcatheter-aortic-valve-replacement-using-automated-tube-voltage-selection-image-quality-and-radiation-exposure
#6
Stefanie Mangold, Carlo N De Cecco, U Joseph Schoepf, Taylor S Kuhlman, Akos Varga-Szemes, Damiano Caruso, Taylor M Duguay, Christian Tesche, Thomas J Vogl, Konstantin Nikolaou, Daniel H Steinberg, Julian L Wichmann
PURPOSE: To assess image quality and accuracy of CT angiography (CTA) for transcatheter aortic valve replacement (TAVR) planning performed with 3rd generation dual-source CT (DSCT). MATERIAL AND METHODS: We evaluated 125 patients who underwent TAVR-planning CTA on 3rd generation DSCT. A two-part protocol was performed including retrospectively ECG-gated coronary CTA (CCTA) and prospectively ECG-triggered aortoiliac CTA using 60mL of contrast medium. Automated tube voltage selection and advanced iterative reconstruction were applied...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28027746/image-quality-of-ct-angiography-using-model-based-iterative-reconstruction-in-infants-with-congenital-heart-disease-comparison-with-filtered-back-projection-and-hybrid-iterative-reconstruction
#7
Qianjun Jia, Jian Zhuang, Jun Jiang, Jiahua Li, Meiping Huang, Changhong Liang
PURPOSE: To compare the image quality, rate of coronary artery visualization and diagnostic accuracy of 256-slice multi-detector computed tomography angiography (CTA) with prospective electrocardiographic (ECG) triggering at a tube voltage of 80kVp between 3 reconstruction algorithms (filtered back projection (FBP), hybrid iterative reconstruction (iDose(4)) and iterative model reconstruction (IMR)) in infants with congenital heart disease (CHD). METHODS: Fifty-one infants with CHD who underwent cardiac CTA in our institution between December 2014 and March 2015 were included...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28024655/prevalence-by-computed-tomographic-angiography-of-coronary-plaques-in-south-asian-and-white-patients-with-type-2-diabetes-mellitus-at-low-and-high-risk-using-four-cardiovascular-risk-scores-ukpds-frs-ascvd-and-jbs3
#8
Sanjay N Gobardhan, Aukelien C Dimitriu-Leen, Alexander R van Rosendael, Erik W van Zwet, Cornelis J Roos, Pranobe V Oemrawsingh, Aan V Kharagjitsingh, J Wouter Jukema, Victoria Delgado, Martin J Schalij, Jeroen J Bax, Arthur J H A Scholte
The aim of this study was to explore the association between various cardiovascular (CV) risk scores and coronary atherosclerotic burden on coronary computed tomography angiography (CTA) in South Asians with type 2 diabetes mellitus and matched whites. Asymptomatic type 2 diabetic South Asians and whites were matched for age, gender, body mass index, hypertension, and hypercholesterolemia. Ten-year CV risk was estimated using different risk scores (United Kingdom Prospective Diabetes Study [UKPDS], Framingham Risk Score [FRS], AtheroSclerotic CardioVascular Disease [ASCVD], and Joint British Societies for the prevention of CVD [JBS3]) and categorized into low- and high-risk groups...
December 2, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/28017291/rationale-design-and-goals-of-the-heartflow-assessing-diagnostic-value-of-non-invasive-ffrct-in-coronary-care-advance-registry
#9
Kavitha M Chinnaiyan, Takashi Akasaka, Tetsuya Amano, Jeroen J Bax, Philipp Blanke, Bernard De Bruyne, Tomohiro Kawasaki, Jonathon Leipsic, Hitoshi Matsuo, Yoshihiro Morino, Koen Nieman, Bjarne L Norgaard, Manesh R Patel, Gianluca Pontone, Mark Rabbat, Campbell Rogers, Neils Peter Sand, Gilbert Raff
BACKGROUND: Coronary CT angiography (CTA) is a reliable tool for the detection of coronary artery disease (CAD) that conveys significant prognostic information. It does not provide data on the hemodynamic significance of a given lesion, particularly in intermediate-grade stenosis. Fractional flow reserve by CT (FFRCT) can accurately predict the hemodynamic significance of coronary lesions. The primary objective of this registry is to determine whether the integration of FFRCT as an adjunct to coronary CTA will lead to a significant change in the management of CAD in patients with stable angina...
December 14, 2016: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28010914/reconstructions-using-rif-in-motion-mapping-technique-have-substantially-less-arrhythmogenic-artifacts-in-dual-source-coronary-cta
#10
Sebastian Daniel Reinartz, Markus Winkler, Sascha B Diefenbach, Thomas Allmendinger, Tobias Penzkofer, Christiane K Kuhl, Andreas H Mahnken
RATIONALE AND OBJECTIVES: Particularly for patients with heart arrhythmias, conventional BestSystole (BS) and BestDiastole (BD) reconstruction techniques in computed tomography (CT) frequently show artifacts that hinder the readability of the coronary tree. To address this problem, this paper presents an alternative reconstruction method that combines the technique "reconstructions with identical filling" (RIF) with motion mapping: This new technique is called "RIF in motion mapping" (RIMM)...
December 20, 2016: Academic Radiology
https://www.readbyqxmd.com/read/27993385/association-of-tobacco-use-and-cessation-with-coronary-atherosclerosis
#11
Michael K Cheezum, Alexander Kim, Marcio S Bittencourt, David Kassop, Alexander Nissen, Dustin M Thomas, Binh Nguyen, Robert J Glynn, Nishant R Shah, Todd C Villines
BACKGROUND AND AIMS: The impact of tobacco use and cessation on atherogenesis remains unclear. We aimed to study the association of tobacco use and prior cessation with the presence, extent and severity of atherosclerosis on coronary computed tomographic angiography (CTA). METHODS: We examined 1798 consecutive symptomatic patients without known coronary artery disease (CAD) referred for CTA, stratified by smoking status (never, current [within 30 days], or former [>30 days before CTA])...
November 16, 2016: Atherosclerosis
https://www.readbyqxmd.com/read/27958693/ct-myocardial-perfusion-state-of-the-science
#12
Damiano Caruso, Domenico DE Santis, U Joseph Schoepf, Marta Zerunian, Marwen Eid, Akos Varga-Szemes, Christian Tesche, Taylor M Duguay, Andrea Laghi, Carlo N DE Cecco
Non-invasive cardiac imaging has rapidly evolved during the last decade due to advancements in CT technologies. Coronary CT angiography (CCTA) has been shown to reliably assess the coronary anatomy and has established itself as the non-invasive imaging technique with the highest sensitivity and specificity in the evaluation of patients with suspected coronary artery disease (CAD). However, this technique has previously been limited to a pure anatomical assessment. CT myocardial perfusion imaging (CT-MPI) is an increasingly rediscovered CT technique able to provide functional assessment of the myocardium and, when combined with CTA, allows for a comprehensive assessment of the coronary arteries, all done within a single modality...
December 13, 2016: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/27922808/vascular-assessment-for-transcatheter-aortic-valve-replacement-intravascular-ultrasound-compared-with-computed-tomography
#13
Essa Essa, Nader Makki, Peter Bittenbender, Quinn Capers, Barry George, Gregory Rushing, Juan Crestanello, Konstantinos Dean Boudoulas, Scott M Lilly
BACKGROUND: Assessment of the femoral and iliac arteries is essential prior to transcatheter aortic valve replacement (TAVR). It is critical for establishing candidacy for a femoral approach, and can help predict vascular complications. Although computed tomography angiography (CTA) is the standard imaging modality, it has limitations. OBJECTIVE: This study compared CTA with intravascular ultrasound (IVUS) in patients undergoing TAVR evaluation. METHODS: Fifteen patients undergoing pre-TAVR coronary angiography and hemodynamic assessment were recruited...
December 2016: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/27909273/-minimally-invasive-coronary-artery-bypass-grafting-using-bilateral-in-situ-internal-thoracic-arteries
#14
Akihiko Yamauchi, Masaki Tabuchi, Shinya Terada, Keita Kikuchi
A 73-year-old male with diabetes mellitius was referred to our hospital for coronary artery bypass grafting (CABG). Preoperative coronary angiography revealed three-vessel coronary disease. Minimally invasive coronary artery grafting (MICS CABG) via left thoracotomy was selected to decrease surgical site infection due to severe diabetes. In situ bilateral internal thoracic arteries (BITA) were harvested using a long type Harmonic scalpel. In situ right internal thorac artery( RITA)-left anterior descending artery (LAD), in situ left internal thorac artery( LITA)-high lateral branch (HL), and aorta-saphenous vein graft (SVG)-#4 posterior descending artery were performed...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27896495/accuracy-of-coronary-computed-tomography-angiography-for-bioresorbable-scaffold-luminal-investigation-a-comparison-with-optical-coherence-tomography
#15
Carlos Collet, Yohei Sotomi, Rafael Cavalcante, Taku Asano, Yosuke Miyazaki, Erhan Tenekecioglu, Pieter Kistlaar, Yaping Zeng, Pannipa Suwanasson, Robbert J de Winter, Koen Nieman, Patrick W Serruys, Yoshinobu Onuma
To establish the accuracy of coronary computed tomography angiography (CTA) for in-scaffold quantitative evaluation with optical coherence tomography (OCT) as a reference. The translucent backbone of the bioresorbable scaffold allow us to evaluate non-invasively the coronary lumen with coronary CTA. In the ABSORB first-in-man studies, coronary CTA was shown to be feasible for quantitative luminal assessment. Nevertheless, a comparison with an intravascular modality with higher resolution has never been performed...
November 28, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/27885414/clinical-implementation-of-an-emergency-department-coronary-computed-tomographic-angiography-protocol-for-triage-of-patients-with-suspected-acute-coronary-syndrome
#16
Brian B Ghoshhajra, Richard A P Takx, Pedro V Staziaki, Harshna Vadvala, Phillip Kim, Tomas G Neilan, Nandini M Meyersohn, Daniel Bittner, Sumbal A Janjua, Thomas Mayrhofer, Jeffrey L Greenwald, Quyhn A Truong, Suhny Abbara, David F M Brown, James L Januzzi, Sanjeev Francis, John T Nagurney, Udo Hoffmann
OBJECTIVES: To evaluate the efficiency and safety of emergency department (ED) coronary computed tomography angiography (CTA) during a 3-year clinical experience. METHODS: Single-center registry of coronary CTA in consecutive ED patients with suspicion of acute coronary syndrome (ACS). The primary outcome was efficiency of coronary CTA defined as the length of hospitalization. Secondary endpoints of safety were defined as the rate of downstream testing, normalcy rates of invasive coronary angiography (ICA), absence of missed ACS, and major adverse cardiac events (MACE) during follow-up, and index radiation exposure...
November 24, 2016: European Radiology
https://www.readbyqxmd.com/read/27872849/automated-segmentation-of-coronary-arteries-based-on-statistical-region-growing-and-heuristic-decision-method
#17
Yun Tian, Yutong Pan, Fuqing Duan, Shifeng Zhao, Qingjun Wang, Wei Wang
The segmentation of coronary arteries is a vital process that helps cardiovascular radiologists detect and quantify stenosis. In this paper, we propose a fully automated coronary artery segmentation from cardiac data volume. The method is built on a statistics region growing together with a heuristic decision. First, the heart region is extracted using a multi-atlas-based approach. Second, the vessel structures are enhanced via a 3D multiscale line filter. Next, seed points are detected automatically through a threshold preprocessing and a subsequent morphological operation...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27866279/high-risk-carotid-plaques-identified-by-ct-angiogram-can-predict-acute-myocardial-infarction
#18
Wassim Mosleh, Keenan Adib, Punnanithinont Natdanai, Andres Carmona-Rubio, Roshan Karki, Jacienta Paily, Mohamed Abdel-Aal Ahmed, Sujit Vakkalanka, Narasa Madam, Gregory D Gudleski, Charles Chung, Umesh C Sharma
Prior studies identified the incremental value of non-invasive imaging by CT-angiogram (CTA) to detect high-risk coronary atherosclerotic plaques. Due to their superficial locations, larger calibers and motion-free imaging, the carotid arteries provide the best anatomic access for the non-invasive characterization of atherosclerotic plaques. We aim to assess the ability of predicting obstructive coronary artery disease (CAD) or acute myocardial infarction (MI) based on high-risk carotid plaque features identified by CTA...
November 19, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/27861382/single-injection-protocol-for-coronary-and-lower-extremity-ct-angiographies-in-patients-suspected-for-peripheral-arterial-disease
#19
Ashish Khandelwal, Takeshi Kondo, Makoto Amanuma, Akitsugu Oida, Tomonari Sano, Saboo S Sachin, Shinichi Takase, Frank J Rybicki, Kanako K Kumamaru
To evaluate the feasibility of a single injection protocol for coronary CT angiography (CTA) and lower extremity CTA in patients suspected for peripheral arterial disease (PAD).This prospective observational study included a total of 103 patients who showed an ankle brachial index ≤0.9 and underwent the single injection protocol for coronary and lower extremity CTA. All CTAs used iodinated contrast (weight × 0.06 mL/s × 20 seconds). A prospective Electrocardiogram (ECG)-gated coronary CTA was performed, followed by helical lower extremity CTA beginning 9 seconds after coronary CTA...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27858923/echocardiographic-diagnosis-of-anomalous-pulmonary-venous-connections-experience-of-84-cases-from-1-medical-center
#20
Ziming Zhang, Li Zhang, Feng Xie, Bing Wang, Zhengxing Sun, Shuangshuang Kong, Xinfang Wang, Nianguo Dong, Guohua Wang, Qing Lv, Yuman Li, Ling Li, Mingxing Xie
We sought to evaluate the value of echocardiography in the diagnosis of different types of anomalous pulmonary venous connections (APVCs) and summarize the diagnostic experience. A total of 84 patients with APVC were confirmed by surgery (n = 82) or computerized tomography angiography (CTA) (n = 2) in the last 6 years (2008-2014) at the Wuhan Union Hospital. The total anomalous pulmonary venous connection (TAPVC) cases account for 60.7%, and partial anomalous pulmonary venous connection (PAPVC) cases account for 39...
November 2016: Medicine (Baltimore)
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