Read by QxMD icon Read

320 slice cta

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
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
Fuminari Tatsugami, Toru Higaki, Hiroaki Sakane, Yuko Nakamura, Makoto Iida, Yasutaka Baba, Chikako Fujioka, Atsuhiro Senoo, Toshiro Kitagawa, Hideya Yamamoto, Yasuki Kihara, Kazuo Awai
OBJECTIVE: The purpose of our study was to compare the diagnostic performance of coronary CT angiography (CTA) subjected to model-based iterative reconstruction (IR) or hybrid IR to rule out coronary in-stent restenosis. METHODS: We enrolled 16 patients who harboured 22 coronary stents. They underwent coronary CTA on a 320-slice CT scanner. The images were reconstructed with hybrid IR (AIDR 3D) and model-based IR (FIRST) algorithms. We calculated the stent lumen attenuation increase ratio and measured the visible stent lumen diameter...
February 2018: British Journal of Radiology
Bo Zhang, Guo-Jun Gu, Hong Jiang, Yi Guo, Xing Shen, Bo Li, Wei Zhang
OBJECTIVES: To validate the value of whole-brain computed tomography perfusion (CTP) and CT angiography (CTA) in the diagnosis of mild cognitive impairment (MCI) and Alzheimer's disease (AD). METHODS: Whole-brain CTP and four-dimensional CT angiography (4D-CTA) images were acquired in 30 MCI, 35 mild AD patients, 35 moderate AD patients, 30 severe AD patients and 50 normal controls (NC). Cerebral blood flow (CBF), cerebral blood volume (CBV), mean transit time (MTT), time to peak (TTP), and correlation between CTP and 4D-CTA were analysed...
November 2017: European Radiology
Samuel Kiil Sørensen, Jørgen Tobias Kühl, Andreas Fuchs, Jakob Boesgaard Norsk, Lars Valeur Køber, Børge Grønne Nordestgaard, Klaus Fuglsang Kofoed
BACKGROUND: The objective of this study was to determine normal values for coronary artery volume (CAV) and individual vasculature and segment dimensions. METHODS: We examined 200 healthy volunteers with an Agatston score of 0 and a normal, high quality coronary CTA. Using 320 slice multidetector row CT and designated vessel tracing software with border detection algorithm, the main coronary arteries and branches were delineated and total and segmental dimensions calculated...
July 2017: Journal of Cardiovascular Computed Tomography
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
L Hubbard, B Ziemer, J Lipinski, S Malkasian, B Sadeghi, H Javan, B Dertli, E M Groves, S Molloi
PURPOSE: To evaluate the accuracy of a low-dose, first-pass-analysis (FPA) dynamic computed tomography angiography and perfusion (CTAP) technique, for whole-organ anatomical and functional assessment of coronary artery disease (CAD). METHODS: An angioplasty balloon was advanced into the left anterior descending (LAD) coronary artery of five swine (35-45 kg) to induce several levels of stenosis at maximal hyperemia (intracoronary adenosine, 240 µg/min). Reference fluorescence microspheres and intravenous contrast (370 mg/mL iodine, 25 mL, 7 mL/s) were injected centrally and dynamic imaging was performed using a 320-slice CT scanner at 100 kVp and 200 mA...
June 2016: Medical Physics
Futoshi Yamanaka, Koki Shishido, Tomoki Ochiai, Noriaki Moriyama, Kazuki Tobita, Tomoyuki Tani, Kyosuke Furuhashi, Kazuya Sugitatsu, Daisuke Hachinohe, Tadashi Wada, Shingo Mizuno, Hidetaka Suenaga, Yutaka Tanaka, Masato Murakami, Junya Matsumi, Saeko Takahashi, Takeshi Akasaka, Shinji Tanaka, Shigeru Saito
OBJECTIVE: Multi-slice computed tomography (MSCT) coronary angiography has been reported as an effective alternative to invasive conventional coronary angiography (CCA) for the diagnosis of coronary artery disease (CAD). However, in previous reports, the diagnostic accuracy of MSCT has not been significant enough to be of benefit in symptomatic patients. The aim of this study was to identify the usefulness of 320-slice computed tomography coronary angiography (320-CTA) for symptomatic patients in terms of the diagnostic accuracy of 320-CTA and the prevalence of vasospastic angina pectoris (VSAP) within the study cohort...
April 2017: European Journal of Internal Medicine
Olivier Ghekiere, Alain Nchimi, Julien Djekic, Mounia El Hachemi, Isabelle Mancini, Dominique Hansen, Piet Vanhoenacker, Albert de Roos, Paul Dendale
PURPOSE: To investigate the diagnostic confidence of Coronary Computed Tomography Angiography (CCTA) and the effect of patient-related factors on CCTA image quality using a second-generation 320-slice scanner. METHODS AND RESULTS: 200 consecutive patients (mean age 60±12years; 109 men) prospectively underwent CCTA. The mean body mass index (BMI) was 27.1±4.9kg/m(2); the median heart rate (HR) was 60.0 (interquartile range (IQR), 53.9-66.1) beats per minute (bpm)...
October 15, 2016: International Journal of Cardiology
Todd C Pulerwitz, Omar K Khalique, Tamim N Nazif, Anna Rozenshtein, Gregory D N Pearson, Rebecca T Hahn, Torsten P Vahl, Susheel K Kodali, Isaac George, Martin B Leon, Belinda D'Souza, Ming Jack Po, Andrew J Einstein
BACKGROUND: Transcatheter aortic valve replacement (TAVR) is a lifesaving procedure for many patients high risk for surgical aortic valve replacement. The prevalence of chronic kidney disease (CKD) is high in this population, and thus a very low contrast volume (VLCV) computed tomography angiography (CTA) protocol providing comprehensive cardiac and vascular imaging would be valuable. METHODS: 52 patients with severe, symptomatic aortic valve disease, undergoing pre-TAVR CTA assessment from 2013-4 at Columbia University Medical Center were studied, including all 26 patients with CKD (eGFR<30 mL/min) who underwent a novel VLCV protocol (20 mL of iohexol at 2...
July 2016: Journal of Cardiovascular Computed Tomography
Joseph Gabriel, Stefan Klimach, Peter Lang, David Hildick-Smith
Invasive coronary angiography (ICA) has long been the established gold standard in assessing graft patency following coronary artery bypass graft (CABG). Over the past decade or so however, improvements in computed tomography angiography (CTA) technology have allowed its emergence as a useful clinical tool in graft assessment. The recent introduction of 64-slice and now 128-slice scanners into widespread distribution, and the development of 320-detector row technology allowing volumetric imaging of the entire heart at single points in time within one cardiac cycle, has increased the potential of CTA to supersede ICA in this capacity...
August 2015: Interactive Cardiovascular and Thoracic Surgery
D Ippolito, C Talei Franzesi, D Fior, P A Bonaffini, O Minutolo, S Sironi
OBJECTIVE: To assess the diagnostic quality of low dose (100 kV) CT angiography (CTA), by using ultra-low contrast medium volume (30 ml), for thoracic and abdominal aorta evaluation. METHODS: 67 patients with thoracic or abdominal vascular disease underwent multidetector CT study using a 256 slice scanner, with low dose radiation protocol (automated tube current modulation, 100 kV) and low contrast medium volume (30 ml; 4 ml s(-1)). Density measurements were performed on ascending, arch, descending thoracic aorta, anonymous branch, abdominal aorta, and renal and common iliac arteries...
May 2015: British Journal of Radiology
Ricardo C Cury, Therese M Kitt, Kathleen Feaheny, Ron Blankstein, Brian B Ghoshhajra, Matthew J Budoff, Jonathon Leipsic, James K Min, Jamie Akin, Richard T George
BACKGROUND: Myocardial CT perfusion (CTP) is a promising tool for the detection of myocardial ischemia. We hypothesize that regadenoson CTP is noninferior to regadenoson single photon emission CT (SPECT) for detecting or excluding myocardial ischemia. METHODS: Patients (men ≥ 45 years; women ≥ 50 years) with known or suspected coronary artery disease (n = 124) were randomized to 1 of 2 diagnostic sequences: rest and regadenoson SPECT on day 1, then regadenoson CTP and rest CTP (and coronary CT angiography [CTA]) (CTA; same acquisition) on day 2 or regadenoson CTP and rest CTP (and CTA) on Day 1, then rest and regadenoson SPECT on day 2...
March 2015: Journal of Cardiovascular Computed Tomography
Suhua Li, Jinlai Liu, Long Peng, Ruimin Dong, Huilan Wu, Chenlin Wang, Qiongqiong Ni, Yanting Luo, Jieming Zhu, Lin Chen
OBJECTIVE: To investigate qualitatively and quantitatively the diagnostic performance of 320-slice CT for detection of coronary artery disease with respect to different atherosclerotic plaque characteristics. METHODS: A retrospective search was performed for inpatients underwent both coronary CT and further coronary angiography (CAG) from December 1, 2008 to December 31, 2012. The diagnostic performance of 320-slice CTA for detecting significant stenosis ( ≥ 50% diameter) with respect to atherosclerotic plaque characteristics were analyzed by calculating sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), accuracy, kappa index (κ), and area under the receiver operating characteristic curve (AUC)...
October 28, 2014: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Xiao-Yan Li, Guo-Ming Zhang, Hong-Ming Zhang, Gang Sun, Shu-Fang Han, Hong Tan, Yu-Qi Gao, Qun Jin, Yan-Min Li, Jie Fang
UNLABELLED: The global coronary calcium score has been widely used in the evaluation of coronary plaque burden and cardiovascular disease events. In this study, we investigated the value of segmental coronary calcium score (SCCS) on the diagnosis and interventional treatment. We studied 87 patients with coronary angiography (CAG) and coronary CT angiography (CTA) by 320-slice dynamic volume CT (DVCT). SCCS was determined for each segmental separately. All lesions which SCCS was greater than 0 were enrolled, and were divided into three groups, mild calcification group (SCCS were less than 80), Moderate calcification group (SCCS were more than 80 and less than 200) and Severe calcification group (SCCS were more than 200)...
2014: International Journal of Clinical and Experimental Medicine
Elyas Ghariq, Adriënne M Mendrik, Peter W A Willems, Raoul M S Joemai, Eidrees Ghariq, Evert-jan Vonken, Matthias J P van Osch, Marianne A A van Walderveen
Background and Purposes. The 320-detector row CT scanner enables visualization of whole-brain hemodynamic information (dynamic CT angiography (CTA) derived from CT perfusion scans). However, arterial image quality in dynamic CTA (dCTA) is inferior to arterial image quality in standard CTA. This study evaluates whether the arterial image quality can be improved by using a total bolus extraction (ToBE) method. Materials and Methods. DCTAs of 15 patients, who presented with signs of acute cerebral ischemia, were derived from 320-slice CT perfusion scans using both the standard subtraction method and the proposed ToBE method...
2014: BioMed Research International
Ashkan A Malayeri, Stefan L Zimmerman, Spencer T Lake, Elliot K Fishman, Pamela T Johnson
This study aims to correlate coronary artery enhancement levels with quality of vessel visualization and calcified plaque visualization using a 128-slice dual-source CT (DSCT) scanner. Coronary CT angiography exams from 52 patients, mean age of 55 years (range, 22-90) and mean weight of 184 lbs (range, 120-320 lbs), were reviewed retrospectively. Contrast infusion rates ranged from 4.5 to 7 mL/s (mean, 5.8 mL/s). Postcontrast density of the largest calcified plaque and postcontrast density of the left main (LM) and right coronary arteries (RCA) were recorded...
October 2014: Emergency Radiology
Xiao-yan Li, Guo-ming Zhang, Gang Sun, Juan Liu, Qing Sun, Li Li, Min Li, Qi-meng Wang
OBJECTIVE: To compare the characteristics of lesions with consistent and inconsistent judgments of coronary stenosis on 320-slice dynamic volume computed tomography (DVCT) versus coronary angiography (CAG). METHODS: Ninety-two patients (265 lesions) with CAG and DVCT within 2 weeks from January 2011 to May 2012 were enrolled. According to the matching degree of stenotic judgment, all lesions were divided into consistent and inconsistent groups. The position of lesions, degree of bending, plaque morphology and calcification proportion were analyzed...
August 20, 2013: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Matthias Rief, Elke Zimmermann, Fabian Stenzel, Peter Martus, Karl Stangl, Johannes Greupner, Fabian Knebel, Anisha Kranz, Peter Schlattmann, Michael Laule, Marc Dewey
OBJECTIVES: This study sought to determine whether adding myocardial computed tomography perfusion (CTP) to computed tomography angiography (CTA) improves diagnostic performance for coronary stents. BACKGROUND: CTA of coronary stents has been limited by nondiagnostic studies caused by metallic stent material and coronary motion. METHODS: CTA and CTP were performed in 91 consecutive patients with stents before quantitative coronary angiography, the reference standard for obstructive stenosis (≥50%)...
October 15, 2013: Journal of the American College of Cardiology
Yukihiro Nagatani, Masashi Takahashi, Hiroshi Sakai, Norihisa Nitta, Hiromitsu Noda, Yasutaka Nakano, Hideji Otani, Akinaga Sonoda, Kiyoshi Murata
SESSION TYPE: COPD: Severity and Risk PredictorsPRESENTED ON: Monday, October 22, 2012 at 11:15 AM - 12:30 PMPURPOSE: To assess the relationship between the total cross-sectional area (CSA) of small pulmonary vessels on computed tomography (CT) images and both coronary arterial calcification index and extent of significant stenotic coronary segments in COPD patientsMETHODS: Study group consisted of 46 COPD patients and 25 emphysema patients without airflow limitation who underwent both coronary CT angiography (CTA) and low-dose chest CT by 320-row scanner...
October 1, 2012: Chest
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"