| Autor: |
Osama A. Smettei, Sawsan Sayed, Abdullah M Al Habib, Fahad Alharbi, Rami M. Abazid |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Journal of the Saudi Heart Association, Vol 30, Iss 3, Pp 165-171 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
1016-7315 |
| DOI: |
10.1016/j.jsha.2017.11.001 |
| Popis: |
Background: Coronary computed tomography angiography (CCTA) is increasingly being used for the evaluation of coronary artery disease; however, radiation exposure remains a major limitation of its use. Objective: To compare image quality and radiation exposure in two groups of patients undergoing CCTA using a 256-slice dual-source helical computed tomography scanner with high-pitch (FLASH) or prospective [step-and-shoot (SAS)] gating protocols. Methods: A prospective, single-center study was performed in our cardiac center. In total, 162 patients underwent CCTA with either FLASH or SAS scanning protocols. Subjective image quality was graded on the basis of a four-point grading system (1, non-diagnostic; 2, adequate; 3, good; 4, excellent). Objective image quality was assessed using image signal, noise, and signal-to-noise ratio (SNR). The effective radiation dose was also estimated. Results: The clinical and demographic characteristics of the patients in both groups were similar. The median age of the patients in both groups was 48.43 years, and males accounted for 63% and 68.7% of the FLASH and SAS groups, respectively. We found that the subjective image quality obtained with the FLASH protocol was superior to that obtained with the SAS protocol (3.35 ± 0.6 mSv vs. 2.82 ± 0.61 mSv; p 0.001) and (21.6 ± 8.7 mSv vs. 16.6 ± 7.7 mSv; p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
