scholarly journals The optimal monoenergetic spectral image level of coronary computed tomography (CT) angiography on a dual-layer spectral detector CT with half-dose contrast media

2020 ◽  
Vol 10 (3) ◽  
pp. 592-603
Author(s):  
Xin Huang ◽  
Sizhe Gao ◽  
Yue Ma ◽  
Xiaomei Lu ◽  
Zheng Jia ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Contrast Media ◽  
Ct Angiography ◽  
Spectral Image ◽  
Coronary Computed Tomography ◽  
Half Dose ◽  
Spectral Detector Ct

P6169Ultra-low radiation 70kv-coronary computed tomography angiography with low-dose contrast media using dual source computed tomography

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
S Komatsu ◽  
S Takahashi ◽  
C Yutani ◽  
M Takewa ◽  
T Ohara ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Body Weight ◽  
Contrast Media ◽  
Computed Tomography Angiography ◽  
Low Dose ◽  
Coronary Computed Tomography Angiography ◽  
Agatston Score ◽  
Coronary Computed Tomography ◽  
Dual Source ◽  
Dual Source Computed Tomography

Abstract Background The major concerns with coronary computed tomography angiography (CCTA) is the amount of contrast media (CM) injected and the radiation dose. Purpose To establish low radiation CCTA with low amount of contrast media. Methods Consecutive 60 patients (body weight ≤70mg or less and Agatston score ≤400) who were scheduled coronary computed tomography angiography were enrolled. Dual-source scanner (SOMATOM Force, Siemens, Germany) was used and CM used was Iopamidol 370mg/I (Bayer, Germany). Coronary CT angiography was performed with Turbo Flash Spiral and Sinogram Affirmed Iterative Reconstruction was done. The dose of contrast media was decided according to our original predicting system for 300HU. This study was approved by the local ethics committee and all patients gave written, informed consent. Exclusion criteria for CCTA were low Agatston score (<50), atrial fibrillation, allergy to CM, renal insufficiency (glomerular filtration rate <60 mL/min/1.73 mm2), pregnancy, congenital heart disease, low left ventricular function, and coronary artery bypass graft. All segments were evaluated using a 5-point scale: 5, excellent and easily assessable,; 4, good, mild artifacts at 1 segment and assessable; 3, evaluable, moderate artifacts on a few segments; 2, evaluable, diagnostic combined with axial images; and 1, not assessable. Results All patients successfully performed CCTA. Age averaged 46±15 yo (mean±S.D.) and body mass index averaged 22.5±3.0. Used CM was 12±7ml and intracoronary CT number 329±28HU. Dose-length product averaged 21.7±15.0 mGy cm and effective dose averaged 0.30±0.21mSv. Image quality averaged 4.8±0.7. CCTA with the lowest effective dose was 0.04mSv and CCTA with the lowest CM was 4ml. Conclusions Ultra-low dose 70kV-CCTA with low dose of contrast media can be performed using dual source computed tomography in patients with body weight ≤70mg or less and Agatston score ≤400.

scholarly journals FFRCT for Complex Coronary Artery Disease Treatment Planning: New Opportunities

2018 ◽  
Vol 13 (3) ◽  
pp. 126 ◽  
Author(s):  
Jonathon Leipsic ◽  
Jonathan Weir-McCall ◽  
Philipp Blanke ◽  
◽  
◽  
...  
Keyword(s):  
Computed Tomography ◽  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Ct Angiography ◽  
Treatment Decision ◽  
Fractional Flow ◽  
Coronary Computed Tomography ◽  
Coronary Ct ◽  
Flow Reserve ◽  
Artery Disease

Coronary computed tomography (CT) is well established for the assessment of symptomatic patients with suspected but not yet confirmed coronary artery disease with high diagnostic accuracy and risk prediction. Until recently, coronary computed tomography angiography (CTA) has played a limited role in the management of complex coronary artery disease (CAD) and in planning revascularisation strategies. With the advent of FFRCT, enabling anatomy and physiology with a single study and the ability to adjudicate lesion specific pressure loss, the potential of combined coronary CT angiography (CCTA) and fractional flow reserve (FFR) computed from non-invasive CT angiography (FFRCT) to inform treatment decision-making and help guide revascularisation has been recognised. In this review, we highlight the evolving role of FFRCT in the management of complex CAD; the opportunities, the data and the unanswered questions.

Sign in / Sign up

Export Citation Format

Share Document