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CT coronary angiography

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https://www.readbyqxmd.com/read/29768380/tradeoff-between-noise-reduction-and-inartificial-visualization-in-a-model-based-iterative-reconstruction-algorithm-on-coronary-computed-tomography-angiography
#1
Kenichiro Hirata, Daisuke Utsunomiya, Masafumi Kidoh, Yoshinori Funama, Seitaro Oda, Hideaki Yuki, Yasunori Nagayama, Yuji Iyama, Takeshi Nakaura, Daisuke Sakabe, Kenichi Tsujita, Yasuyuki Yamashita
We aimed to evaluate the image quality performance of coronary CT angiography (CTA) under the different settings of forward-projected model-based iterative reconstruction solutions (FIRST).Thirty patients undergoing coronary CTA were included. Each image was reconstructed using filtered back projection (FBP), adaptive iterative dose reduction 3D (AIDR-3D), and 2 model-based iterative reconstructions including FIRST-body and FIRST-cardiac sharp (CS). CT number and noise were measured in the coronary vessels and plaque...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29764968/how-to-prevent-and-manage-radiation-induced-coronary-artery-disease
#2
REVIEW
Jason R Cuomo, Sean P Javaheri, Gyanendra K Sharma, Deepak Kapoor, Adam E Berman, Neal L Weintraub
Radiation-induced coronary heart disease (RICHD) is the second most common cause of morbidity and mortality in patients treated with radiotherapy for breast cancer, Hodgkin's lymphoma and other prevalent mediastinal malignancies. The risk of RICHD increases with radiation dose. Exposed patients may present decades after treatment with manifestations ranging from asymptomatic myocardial perfusion defects to ostial, triple-vessel disease and sudden cardiac death. RICHD is insidious, with a long latency and a tendency to remain silent late into the disease course...
May 15, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29754806/machine-learning-in-cardiac-ct-basic-concepts-and-contemporary-data
#3
REVIEW
Gurpreet Singh, Subhi J Al'Aref, Marly Van Assen, Timothy Suyong Kim, Alexander van Rosendael, Kranthi K Kolli, Aeshita Dwivedi, Gabriel Maliakal, Mohit Pandey, Jing Wang, Virginie Do, Manasa Gummalla, Carlo N De Cecco, James K Min
Propelled by the synergy of the groundbreaking advancements in the ability to analyze high-dimensional datasets and the increasing availability of imaging and clinical data, machine learning (ML) is poised to transform the practice of cardiovascular medicine. Owing to the growing body of literature validating both the diagnostic performance as well as the prognostic implications of anatomic and physiologic findings, coronary computed tomography angiography (CCTA) is now a well-established non-invasive modality for the assessment of cardiovascular disease...
April 30, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29752224/prevalence-and-impact-of-scan-related-anxiety-during-coronary-ct-angiography-a-prospective-cohort-study-of-366-patients
#4
Mickaël Ohana, Stephanie L Sellers, John Mooney, Shaw-Hua Kueh, Rominder Grover, Chesnal D Arepalli, Kapilan Selvakumar, Ung Kim, Philipp Blanke, Jonathon A Leipsic
BACKGROUND: Scanxiety, the anxiety/stress associated with an imaging test, has never been evaluated in relation to coronary CT angiography (Coronary CTA). As it could impact heart rate and thereby affect image quality of Coronary CTA, we aimed to evaluate the prevalence, severity, and impact of scanxiety on quality and interpretability of Coronary CTA. METHODS: 366 consecutive patients were prospectively presented with a clinical questionnaire comprising two tests to evaluate their scan-related anxiety: the Impact of Event IES-6 (6 questions, final score 0-24) and a visual stress-scale (1 question, score 1-10)...
May 4, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29743388/ultra-high-resolution-computed-tomography-angiography-for-assessment-of-coronary-artery-stenosis
#5
Sadako Motoyama, Hajime Ito, Masayoshi Sarai, Yasuomi Nagahara, Keiichi Miyajima, Ryota Matsumoto, Yujiro Doi, Yumi Kataoka, Hiroshi Takahashi, Yukio Ozaki, Hiroshi Toyama, Kazuhiro Katada
BACKGROUND: Limitations of coronary computed tomography (CTA) include false-positive stenosis at calcified lesions and assessment of in-stent patency. A prototype of ultra-high resolution computed tomography (U-HRCT: 1,792 channels and 0.25-mm slice thickness×128 rows) with improved spatial resolution was developed. We assessed the diagnostic accuracy of coronary artery stenosis using U-HRCT.Methods and Results:Seventy-nine consecutive patients who underwent CTA using U-HRCT were prospectively included...
May 9, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29739328/a-novel-ultrafast-low-dose-computed-tomography-protocol-allows-concomitant-coronary-artery-evaluation-and-lung-cancer-screening
#6
Carlo Gaudio, Gennaro Petriello, Francesco Pelliccia, Alessandra Tanzilli, Alberto Bandiera, Gaetano Tanzilli, Francesco Barillà, Vincenzo Paravati, Massimo Pellegrini, Enrico Mangieri, Paolo Barillari
BACKGROUND: Cardiac computed tomography (CT) is often performed in patients who are at high risk for lung cancer in whom screening is currently recommended. We tested diagnostic ability and radiation exposure of a novel ultra-low-dose CT protocol that allows concomitant coronary artery evaluation and lung screening. METHODS: We studied 30 current or former heavy smoker subjects with suspected or known coronary artery disease who underwent CT assessment of both coronary arteries and thoracic area (Revolution CT, General Electric)...
May 8, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29736853/is-mri-equivalent-to-ct-in-the-guidance-of-tavr-a-pilot-study
#7
Agnes Mayr, Gert Klug, Sebastian J Reinstadler, Hans-Josef Feistritzer, Martin Reindl, Christian Kremser, Christof Kranewitter, Nikolaos Bonaros, Guy Friedrich, Gudrun Feuchtner, Bernhard Metzler
OBJECTIVES: To compare a comprehensive cardiovascular magnetic resonance imaging (MRI) protocol with contrast-enhanced computed tomography angiography (CTA) for guidance in transcatheter aortic valve replacement (TAVR) evaluation. METHODS AND RESULTS: Non-contrast three-dimensional (3D) 'whole heart' MRI imaging for aortic annulus sizing and measurements of coronary ostia heights, contrast-enhanced MRI angiography (MRA) for evaluation of transfemoral routes as well as aortoiliofemoral-CTA were performed in 16 patients referred for evaluation of TAVR...
May 7, 2018: European Radiology
https://www.readbyqxmd.com/read/29730724/patient-related-factors-influencing-detectability-of-coronary-arteries-in-320-row-ct-angiography-in-infants-with-complex-congenital-heart-disease
#8
Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Seitaro Shin, Takuya Hino, Hazumu Nagata, Hidetake Yabuuchi, Michinobu Nagao, Hiroshi Honda
To investigate the performance of second-generation 320-row computed tomographic (CT) angiography (CTA) in detecting coronary arteries and identify factors influencing visibility of the coronary arteries in infants with complex congenital heart disease (CHD). Data of 60 infants (aged 0-2 years, median 2 months) with complex CHD who underwent examination using 320-row CTA with low-dose prospective electrocardiogram-triggered volume target scanning were reviewed. The coronary arteries of each infant were assessed using a 0-4-point scoring system based on the number of coronary segments with a visible course...
May 5, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29730016/diagnostic-accuracy-of-semi-automatic-quantitative-metrics-as-an-alternative-to-expert-reading-of-ct-myocardial-perfusion-in-the-core320-study
#9
Mohammad R Ostovaneh, Andrea L Vavere, Vishal C Mehra, Klaus F Kofoed, Matthew B Matheson, Armin Arbab-Zadeh, Yasuko Fujisawa, Joanne D Schuijf, Carlos E Rochitte, Arthur J Scholte, Kakuya Kitagawa, Marc Dewey, Christopher Cox, Marcelo F DiCarli, Richard T George, Joao A C Lima
AIMS: To determine the diagnostic accuracy of semi-automatic quantitative metrics compared to expert reading for interpretation of computed tomography perfusion (CTP) imaging. METHODS: The CORE320 multicenter diagnostic accuracy clinical study enrolled patients between 45 and 85 years of age who were clinically referred for invasive coronary angiography (ICA). Computed tomography angiography (CTA), CTP, single photon emission computed tomography (SPECT), and ICA images were interpreted manually in blinded core laboratories by two experienced readers...
April 3, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29722491/-routine-preoperative-testing-in-adults-undergoing-elective-non-cardiothoracic-surgery
#10
REVIEW
N Benahmed, G Briat, K Rondia, J Vlayen
INTRODUCTION: The Belgian Health Care Knowledge Center (KCE) developed a guideline about routine preoperative testing in adults undergoing elective non-cardiothoracic surgery. The guideline is intended for all care providers involved in the preoperative and perioperative management (incl. anesthesiologists, surgeons, cardiologists, lung specialists, radiologists, clinical biologists, general practitioners, etc). METHOD: A recent English guideline published by NICE (National Institute for Health and Care Excellence) was used as a starting point and adapted to the Belgian context...
2018: Revue Médicale de Bruxelles
https://www.readbyqxmd.com/read/29720611/blooming-artifact-reduction-in-coronary-artery-calcification-by-a-new-de-blooming-algorithm-initial-study
#11
Ping Li, Lei Xu, Lin Yang, Rui Wang, Jiang Hsieh, Zhonghua Sun, Zhanming Fan, Jonathon A Leipsic
The aim of this study was to investigate the use of de-blooming algorithm in coronary CT angiography (CCTA) for optimal evaluation of calcified plaques. Calcified plaques were simulated on a coronary vessel phantom and a cardiac motion phantom. Two convolution kernels, standard (STND) and high-definition standard (HD STND), were used for imaging reconstruction. A dedicated de-blooming algorithm was used for imaging processing. We found a smaller bias towards measurement of stenosis using the de-blooming algorithm (STND: bias 24...
May 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29713929/coronary-computed-tomography-angiography-in-the-evaluation-of-intermediate-risk-asymptomatic-individuals
#12
Ernesto Di Cesare, Lucia Patriarca, Luca Panebianco, Federico Bruno, Pierpaolo Palumbo, Ester Cannizzaro, Alessandra Splendiani, Antonio Barile, Carlo Masciocchi
Cardiovascular disease is still one of the main causes of death and an early identification of coronary artery disease (CAD) remains the primary step in clinical management of patients with cardiovascular risk factor. Coronary computed tomography angiography (CCTA) has shown high sensitivity in CAD detection and could be helpful as screening method. The purpose of this study was to assess the prevalence of coronary artery disease detected by CCTA in asymptomatic patients with an intermediate risk of CAD. MATERIALS AND METHODS: We retrospectively selected 185 asymptomatic patients with an intermediate Framingan Risk Score (mean age was 62...
April 30, 2018: La Radiologia Medica
https://www.readbyqxmd.com/read/29713770/comprehensive-morphologic-and-functional-imaging-of-heart-transplant-patients-first-experience-with-dynamic-perfusion-ct
#13
S Oebel, S Hamada, K Higashigaito, J von Spiczak, E Klotz, F Enseleit, R Hinzpeter, F Ruschitzka, R Manka, H Alkadhi
OBJECTIVES: We aimed to assess the diagnostic performance of a combined protocol with coronary computed tomography angiography (CCTA) and stress CT perfusion imaging (CTP) in heart transplant patients for comprehensive morphological and functional imaging. METHODS: In this prospective study, 13 patients undergoing routine follow-up 8±6 years after heart transplantation underwent CCTA and dynamic adenosine stress CTP using a third-generation dual-source CT scanner, cardiac magnetic resonance (MR) adenosine stress perfusion imaging at 1...
April 30, 2018: European Radiology
https://www.readbyqxmd.com/read/29706286/practice-standards-developed-and-quality-improvement-for-use-of-coronary-ct-angiography-in-taiwan
#14
Shee Yen Tay, Wilson T Lao, Ming-Yen Ng, Ying Chin Lin, Yi-Han Chung, Wing P Chan
No abstract text is available yet for this article.
April 26, 2018: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29703635/differences-in-the-association-of-total-versus-local-coronary-artery-calcium-with-acute-coronary-syndrome-and-culprit-lesions-in-patients-with-acute-chest-pain-the-coronary-calcium-paradox
#15
Stefan B Puchner, Thomas Mayrhofer, Jakob Park, Michael T Lu, Ting Liu, Pal Maurovich-Horvat, Khristine Ghemigian, Daniel O Bittner, Jerome L Fleg, James E Udelson, Quynh A Truong, Udo Hoffmann, Maros Ferencik
BACKGROUND AND AIMS: Total coronary artery calcium (CAC) burden is associated with an increased cardiovascular risk, while local CAC may represent stable plaques. We determined differences in relationship of total CAC with acute coronary syndrome (ACS) and local CAC with culprit lesions in patients with suspected ACS. METHODS: We performed computed tomography (CT) for CAC and CT angiography to assess the presence of significant stenosis and high-risk plaque (positive remodeling, low CT attenuation, napkin-ring sign, spotty calcium) in 37 patients with ACS and 223 controls...
April 17, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29696452/computer-aided-analysis-of-64-and-320-slice-coronary-computed-tomography-angiography-a-comparison-with-expert-human-interpretation
#16
Moshrik Abd Alamir, Pamela Noack, Kristine H Jang, Jhanna A Moore, Roman Goldberg, Michael Poon
Routine use of CCTA to triage Emergency Department (ED) chest pain can reduce ED length of stay while providing accurate diagnoses. We evaluated the effectiveness of using Computer Aided Diagnosis in the triage of low to intermediate risk emergency chest pain patients with Coronary Computed Tomographic Angiography (CCTA). Using 64 and 320 slice CT scanners, we compared the diagnostic capability of computer aided diagnosis to human readers in 923 ED patients with chest pain. We calculated sensitivity, specificity, Positive Predictive Value and Negative Predictive Value for cases performed on each scanner...
April 25, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29696430/subtraction-ct-angiography-improves-evaluation-of-significant-coronary-artery-disease-in-patients-with-severe-calcifications-or-stents-the-c-sub-320-multicenter-trial
#17
Andreas Fuchs, J Tobias Kühl, Marcus Y Chen, David Viladés Medel, Xavier Alomar, Sujata M Shanbhag, Steffen Helqvist, Klaus F Kofoed
OBJECTIVES: Diagnostic accuracy of conventional coronary CT angiography (CCTAconv ) may be compromised by blooming artifacts from calcifications or stents. Blooming artifacts may be reduced by subtraction coronary CT angiography (CCTAsub ) in which non-contrast and contrast CT data sets are subtracted digitally. We tested whether CCTAsub in patients with severe coronary calcification or stents reduces the number of false-positive stenosis evaluations compared with CCTAconv . METHODS: In this study, 180 symptomatic patients scheduled for invasive coronary angiography (ICA) were prospectively enrolled and CT scanned (2013-2016) at three international centers...
April 25, 2018: European Radiology
https://www.readbyqxmd.com/read/29691271/unusual-congenital-coronary-artery-anomaly-in-a-young-adult-presenting-as-sudden-cardiac-arrest
#18
Manuel Cortes, Carlos A Roldan, Stacey Clegg
A previously asymptomatic young female with no previous medical or cardiac history collapsed during indoor exercise. A portable automatic external defibrillator showed a shockable rhythm. She received multiple electrical shocks with return to normal sinus rhythm without ischaemic ECG changes. Her troponin level was mildly elevated. A transthoracic echocardiogram revealed moderately reduced left ventricular ejection fraction with global hypokinesis. During emergent coronary angiography, the left main coronary artery could not be found...
April 24, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29688745/evaluation-of-dual-energy-computed-tomography-iodine-mapping-within-the-myocardial-blood-pool-for-detection-of-acute-myocardial-infarction-correlation-with-histopathological-findings-in-a-porcine-model
#19
Kai Sun, Ruijuan Han, Ruiping Zhao, Shuancheng Bai, Junyan Wang, Jiang Hu, Bin Lu
OBJECTIVE: We assessed the diagnostic value of "one-step" dual energy CT (DECT) in combination with coronary CT angiography and iodine mapping within the myocardial blood pool in detecting acute myocardial infarction (AMI). METHODS: Five minipigs were subjected to transcatheter embolization of coronary artery with a gelatin sponge to induce AMI. Arterial-phase myocardial DECT imaging was carried out 1 h before and 24 h after embolism of the coronary...
May 11, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29688734/assessing-the-relation-of-epicardial-fat-thickness-and-volume-quantified-by-256-slice-computed-tomography-scan-with-coronary-artery-disease-and-cardiovascular-risk-factors
#20
Maryam Mohammadzadeh, Vahid Mohammadzadeh, Madjid Shakiba, Marzieh Motevalli, Azadeh Abedini, Sakineh Kadivar, Pouya Entezari, Ali Mohammadzadeh
BACKGROUND: This study aimed to investigate the association between epicardial adipose tissue (EAT) and coronary artery disease (CAD) as well as cardiovascular risk factors. METHODS: Complete medical records of subjects were reviewed and cardiovascular risk factors were recorded. Epicardial fat volume (EFV) and epicardial fat thickness (EFT) were measured using digital volumetry of acquired images using a 256-slice CT-scanner. Calcium score was measured using Agatston method in non-contrast images...
March 1, 2018: Archives of Iranian Medicine
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