keyword
MENU ▼
Read by QxMD icon Read
search

Ct calcium score

keyword
https://www.readbyqxmd.com/read/28741065/coronary-calcium-scoring-of-ct-attenuation-correction-scans-automatic-manual-or-visual
#1
EDITORIAL
Shifali Dumeer, Andrew J Einstein
No abstract text is available yet for this article.
July 24, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28740456/carotid-artery-stiffness-digital-endothelial-function-and-coronary-calcium-in-patients-with-essential-thrombocytosis-free-of-overt-atherosclerotic-disease
#2
Matjaz Vrtovec, Ajda Anzic, Irena Preloznik Zupan, Katja Zaletel, Ales Blinc
BACKGROUND: Patients with myeloproliferative neoplasms (MPNs) are at increased risk for atherothrombotic events. Our aim was to determine if patients with essential thrombocytosis (ET), a subtype of MPNs, free of symptomatic atherosclerosis, have greater carotid artery stiffness, worse endothelial function, greater coronary calcium and carotid plaque burden than control subjects. PATIENTS AND METHODS: 40 ET patients without overt vascular disease, and 42 apparently healthy, age and sex-matched control subjects with comparable classical risk factors for atherosclerosis and Framingham risk of coronary disease were enrolled...
June 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/28729297/association-between-intracranial-atherosclerotic-calcium-burden-and-angiographic-luminal-stenosis-measurements
#3
H Baradaran, P Patel, G Gialdini, A Giambrone, M P Lerario, B B Navi, J K Min, C Iadecola, H Kamel, A Gupta
BACKGROUND AND PURPOSE: Calcification of the intracranial vasculature is an independent risk factor for stroke. The relationship between luminal stenosis and calcium burden in the intracranial circulation is incompletely understood. We evaluated the relationship between atherosclerotic calcification and luminal stenosis in the intracranial ICAs. MATERIALS AND METHODS: Using a prospective stroke registry, we identified patients who had both NCCT and CTA or MRA examinations as part of a diagnostic evaluation for ischemic stroke...
July 20, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28710871/detection-and-quantification-of-coronary-calcium-from-dual-energy-chest-x-rays-phantom-feasibility-study
#4
Bo Zhou, Di Wen, Katelyn Nye, Robert C Gilkeson, Brendan Eck, David Jordan, David L Wilson
PURPOSE: We have demonstrated the ability to identify coronary calcium, a reliable biomarker of coronary artery disease, using non-gated, 2-shot, dual energy (DE) chest x-ray imaging. Here we will use digital simulations, backed up by measurements, to characterize DE calcium signals and the role of potential confounds such as beam hardening, x-ray scatter, cardiac motion, and pulmonary artery pulsation. For the DE calcium signal, we will consider quantification, as compared to CT calcium score, and visualization...
July 15, 2017: Medical Physics
https://www.readbyqxmd.com/read/28674321/incremental-prognostic-value-of-coronary-computed-tomography-angiography-high-risk-plaque-characteristics-in-asymptomatic-patients
#5
Kazuhisa Takamura, Shinichiro Fujimoto, Takeshi Kondo, Makoto Hiki, Yuko Kawaguchi, Etsuro Kato, Hiroyuki Daida
AIM: Coronary computed tomography angiography (CCTA) findings of positive remodeling (index >1.1) and low-attenuation plaque (<30 Hounsfield units) are recognized as CT-verified high-risk plaque (CT-HRP). Therefore, we investigated the incremental prognostic value of evaluation of plaque characteristics using CCTA in asymptomatic patients. METHODS: Overall, 495 consecutive patients without any known coronary artery disease who underwent CCTA were included in this study...
July 1, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28668419/dose-reduction-techniques-in-coronary-calcium-scoring-the-effect-of-iterative-reconstruction-combined-with-low-tube-voltage-on-calcium-scores-in-a-thoracic-phantom
#6
Marleen Vonder, Gert Jan Pelgrim, Mathias Meyer, Thomas Henzler, Matthijs Oudkerk, Rozemarijn Vliegenthart
OBJECTIVES: To define a dose-reduced coronary calcium CT protocol that provides similar calcium score values as a conventional 120kVp protocol. METHODS: A thorax phantom containing 100 calcifications was scanned with the reference protocol (120kVp, 90 ref mAs, FBP) and 30 dose-reduced protocols (70-110kVp, 90 ref mAs, FBP and iterative reconstruction (IR) levels 1-5) with 3rd generation dual-source CT. For protocols that yielded similar detectability and calcium scores as the reference protocol, additional scans were acquired at reduced ref mAs...
August 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28663384/ct-angiography-images-of-coronary-artery-stenosis-provide-a-better-prediction-of-risk-than-traditional-risk-factors-in-asymptomatic-individuals-with-type-2-diabetes-a-long-term-study-of-clinical-outcomes
#7
Kwan Yong Lee, Byung-Hee Hwang, Tae-Hoon Kim, Chan Jun Kim, Jin-Jin Kim, Eun-Ho Choo, Ik Jun Choi, Young Choi, Ha-Wook Park, Yoon-Seok Koh, Pum-Joon Kim, Jong Min Lee, Mi-Jeong Kim, Doo Soo Jeon, Jae-Hyoung Cho, Jung Im Jung, Ki-Bae Seung, Kiyuk Chang
OBJECTIVE: We investigated the efficacy of coronary computed tomography angiography (CCTA) in predicting the long-term risks in asymptomatic patients with type 2 diabetes and compared it with traditional risk factors. RESEARCH DESIGN AND METHODS: We analyzed 933 patients with asymptomatic type 2 diabetes who underwent CCTA. Stenosis was considered obstructive (≥50%) in each coronary artery segment using CCTA. The extent and severity scores for coronary artery disease (CAD) were evaluated...
June 29, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28662835/ct-angiography-to-evaluate-coronary-artery-disease-and-revascularization-requirement-before-trans-catheter-aortic-valve-replacement
#8
Alexia Rossi, Carlo N De Cecco, Simon R O Kennon, Lu Zou, Felix G Meinel, William Toscano, Sabrina Segreto, Stephan Achenbach, Jörg Hausleiter, U Joseph Schoepf, Francesca Pugliese
BACKGROUND: Coronary artery disease (CAD) and aortic stenosis share pathophysiological mechanisms and risk factors. We evaluated the clinical utility of coronary computed tomography angiography (CTA) to identify CAD and revascularization requirement in patients with severe aortic stenosis considered for transcatheter aortic valve replacement (TAVR). METHODS: Consecutive patients without known CAD underwent calcium scoring, CTA and invasive coronary angiography (ICA)...
June 22, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28637586/soluble-lr11-associates-with-aortic-root-calcification-in-asymptomatic-treated-male-patients-with-familial-hypercholesterolemia
#9
Ranitha Vongpromek, Sven Bos, Gert-Jan R Ten Kate, Hideaki Bujo, Meizi Jiang, Koen Nieman, Wolfgang Schneider, Jeanine E Roeters van Lennep, Adrie J M Verhoeven, Eric J G Sijbrands, Monique T Mulder
BACKGROUND AND AIMS: Despite statin treatment, a high prevalence of severe vascular calcification is found in patients with familial hypercholesterolemia (FH). We assessed the relation between the circulating soluble form of low-density lipoprotein receptor relative with 11 ligand-binding repeats (sLR11), a risk factor for cardiovascular disease, and vascular calcification in asymptomatic statin-treated heterozygous FH patients. METHODS: In 123 asymptomatic heterozygous FH patients (age 40-69 years), aortic root (ARC), aortic valve (AVC) and coronary artery calcification (CAC) were determined with CT-based calcium scoring expressed in Agatston units...
June 9, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28630603/elevated-il-37-levels-in-the-plasma-of-patients-with-severe-coronary-artery-calcification
#10
Meng Chai, Hai-Tao Zhang, Yu-Jie Zhou, Qing-Wei Ji, Qing Yang, Yu-Yang Liu, Ying-Xin Zhao, Dong-Mei Shi, Wei Liu, Li-Xia Yang, Lin-Lin Zhang, Jing Liang
BACKGROUND: Coronary artery calcification (CAC) is a predictor of cardiovascular events and plaque burden and is closely associated with chronic inflammation. Interleukin (IL)-37 is a newly discovered member of the IL-1 family and is considered an anti-inflammatory cytokine. Our recent study on mice indicated that IL-37 could attenuate atherosclerosis and vascular calcification, which suggests that IL-37 could be associated with the development of atherosclerosis and related diseases...
May 2017: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/28629567/ct-coronary-calcium-scoring-with-tin-filtration-using-iterative-beam-hardening-calcium-correction-reconstruction
#11
Christian Tesche, Carlo N De Cecco, U Joseph Schoepf, Taylor M Duguay, Moritz H Albrecht, Domenico De Santis, Akos Varga-Szemes, Virginia W Lesslie, Ullrich Ebersberger, Richard R Bayer, Christian Canstein, Ellen Hoffmann, Thomas Allmendinger, John W Nance
OBJECTIVES: To investigate the diagnostic accuracy of CT coronary artery calcium scoring (CACS) with tin pre-filtration (Sn100kVp) using iterative beam-hardening correction (IBHC) calcium material reconstruction compared to the standard 120kVp acquisition. BACKGROUND: Third generation dual-source CT (DSCT) CACS with Sn100kVp acquisition allows significant dose reduction. However, the Sn100kVp spectrum is harder with lower contrast compared to 120kVp, resulting in lower calcium score values...
June 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28607763/in%C3%A2-vitro-evaluation-of-a-new-iterative-reconstruction-algorithm-for-dose-reduction-in-coronary-artery-calcium-scoring
#12
Tobias Gassenmaier, Thomas Allmendinger, Andreas S Kunz, Maike Veyhl-Wichmann, Süleyman Ergün, Thorsten A Bley, Bernhard Petritsch
BACKGROUND: Coronary artery calcium (CAC) scoring is a widespread tool for cardiac risk assessment in asymptomatic patients and accompanying possible adverse effects, i.e. radiation exposure, should be as low as reasonably achievable. PURPOSE: To evaluate a new iterative reconstruction (IR) algorithm for dose reduction of in vitro coronary artery calcium scoring at different tube currents. MATERIAL AND METHODS: An anthropomorphic calcium scoring phantom was scanned in different configurations simulating slim, average-sized, and large patients...
May 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28605936/vascular-disease-and-kidney-stones-abdominal-aortic-calcifications-are-associated-with-low-urine-ph-and-hypocitraturia
#13
Nishant D Patel, Ryan D Ward, Juan Calle, Erick M Remer, Manoj Monga
OBJECTIVE: Vascular calcifications are associated with nephrolithiasis. Although studies have demonstrated correlations with vascular disease and calcium stones in kidney stone formers (KSF), an etiologic link has remained elusive. As a noncontrast CT (NCCT) scan is typically part of a stone evaluation, our objective was to evaluate the association of NCCT-based assessment of abdominal aortic calcifications (AACs) with 24-hour urine parameters and stone composition. MATERIALS AND METHODS: Ninety-seven KSF were included with CT imaging and 24-hour urine studies...
July 7, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28600674/-value-of-cardiac-ct-in-the-diagnostic-work-up-of-coronary-artery-disease-update-2017
#14
M Meyer, T Henzler
The quantification of coronary calcifications using noncontrast-enhanced computed tomography (CT) as well as coronary CT angiography (cCTA) have rapidly evolved in the recent years. Nowadays, both techniques are increasingly clinically accepted regarding risk stratification and accurate exclusion of significant coronary artery disease (CAD). The higher acceptance of cCTA is mainly based on the higher robustness, lower radiation exposure through continuous technical innovations as well as by the growing scientific evidence...
June 9, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28597124/relative-atherosclerotic-plaque-volume-by-ct-coronary-angiography-trumps-conventional-stenosis-assessment-for-identifying-flow-limiting-lesions
#15
Nahoko Kato, Satoru Kishi, Armin Arbab-Zadeh, Frank J Rybicki, Shuzou Tanimoto, Jiro Aoki, Mika Watanabe, Yu Horiuchi, Koichi Furui, Kazuhiro Hara, Kenji Ibukuro, Joao A C Lima, Kengo Tanabe
The new methods for diagnosing the ischemia with coronary computed tomographic angiography (CTA) as a noninvasive test have been investigated. To compare the relative plaque volume to quantitative CTA and quantitative coronary angiography (QCA) for detecting flow-limiting coronary artery stenoses. We studied 49 patients with 55 intermediate lesions (30-69% diameter stenosis) who underwent CTA, coronary angiography (CAG), and FFR. CTA and QCA measures included lesion length, percent diameter stenosis (%DS), minimal lumen diameter (MLD), target main vessel percent plaque volume (%PV), lesion %PV, target main vessel percent lumen volume (%LV), and lesion %LV...
June 8, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28574346/generative-adversarial-networks-for-noise-reduction-in-low-dose-ct
#16
Jelmer M Wolterink, Tim Leiner, Max A Viergever, Ivana Isgum
Noise is inherent to low-dose CT acquisition. We propose to train a convolutional neural network (CNN) jointly with an adversarial CNN to estimate routine-dose CT images from low-dose CT images and hence reduce noise. A generator CNN was trained to transform low-dose CT images into routine-dose CT images using voxel-wise loss minimization. An adversarial discriminator CNN was simultaneously trained to distinguish the output of the generator from routinedose CT images. The performance of this discriminator was used as an adversarial loss for the generator...
May 26, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28547671/is-coronary-calcium-scoring-too-late-total-body-arterial-calcium-burden-in-patients-without-known-cad-and-normal-mpi
#17
Adel H A Allam, Randall C Thompson, Michael A Eskander, Mohamed A Mandour Ali, Ayman Sadek, Chris J Rowan, M Linda Sutherland, James D Sutherland, Bruno Frohlich, David E Michalik, Caleb E Finch, Jagat Narula, Gregory S Thomas, L Samuel Wann
BACKGROUND: Patients with normal myocardial perfusion imaging (MPI) have a good prognosis. However, pre-clinical coronary and extracoronary atherosclerosis may exist in the absence of myocardial ischemia. METHODS: 154 Egyptian patients (mean age 53 years) underwent whole-body non-contrast CT following normal MPI. RESULTS: Atherosclerosis in the form of calcification was observed in ≥1 vascular bed in 115 of 154 (75%) patients. This included the iliofemoral (62%), abdominal aorta (53%), thoracic aorta (47%), coronary (47%), and carotid (25%) vascular beds...
May 25, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28543093/relationship-between-carotid-atherosclerosis-and-coronary-artery-calcification-in-asymptomatic-diabetic-patients-a-prospective-multicenter-study
#18
Anand Jeevarethinam, Shreenidhi Venuraju, Alain Dumo, Sherezade Ruano, Vishal S Mehta, Miranda Rosenthal, Devaki Nair, Mark Cohen, Daniel Darko, Avijit Lahiri, Roby Rakhit
BACKGROUND: The value of screening sub-clinical atherosclerosis in asymptomatic patients with type 2 diabetes mellitus (T2DM) remains controversial. HYPOTHESIS: An integrated model incorporating carotid intima-media thickness (CIMT) and carotid plaque with traditional risk factors can be used to predict prevalence and severity of coronary artery calcification in asymptomatic T2DM patients. METHODS: A cohort of 262 asymptomatic T2DM patients were prospectively studied with carotid ultrasound to evaluate CIMT and carotid plaque and also a computed tomography coronary artery calcium (CT-CAC) scan...
May 25, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28528743/-18-f-sodium-fluoride-positron-emission-tomography-for-molecular-imaging-of-coronary-atherosclerosis-based-on-computed-tomography-analysis
#19
Toshiro Kitagawa, Hideya Yamamoto, Shinya Toshimitsu, Ko Sasaki, Atsuhiro Senoo, Yumiko Kubo, Fuminari Tatsugami, Kazuo Awai, Yutaka Hirokawa, Yasuki Kihara
BACKGROUND AND AIMS: We aimed at evaluating the relation of (18)F-sodium fluoride ((18)F-NaF) uptake on positron emission tomography (PET) to coronary atherosclerosis detected and assessed by computed tomography (CT). METHODS: Thirty-two patients with one or more coronary atherosclerotic lesions detected on cardiac CT underwent (18)F-NaF PET/CT. Each coronary atherosclerotic lesion was evaluated on CT angiography for plaque types (calcified plaque [CP], non-calcified plaque [NCP], partially calcified plaque [PCP]), and the presence of CT-based high-risk features (minimum CT density <30 Hounsfield units and vascular remodeling index >1...
April 29, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28500370/long-term-prognostic-performance-of-low-dose-coronary-computed-tomography-angiography-with-prospective-electrocardiogram-triggering
#20
Olivier F Clerc, Basil P Kaufmann, Mathias Possner, Riccardo Liga, Jan Vontobel, Fran Mikulicic, Christoph Gräni, Dominik C Benz, Tobias A Fuchs, Julia Stehli, Aju P Pazhenkottil, Oliver Gaemperli, Philipp A Kaufmann, Ronny R Buechel
OBJECTIVES: To assess long-term prognosis after low-dose 64-slice coronary computed tomography angiography (CCTA) using prospective electrocardiogram-triggering. METHODS: We included 434 consecutive patients with suspected or known coronary artery disease referred for low-dose CCTA. Patients were classified as normal, with non-obstructive or obstructive lesions, or previously revascularized. Coronary artery calcium score (CACS) was assessed in 223 patients. Follow-up was obtained regarding major adverse cardiac events (MACE): cardiac death, myocardial infarction and elective revascularization...
May 12, 2017: European Radiology
keyword
keyword
59715
1
2
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"