RT Journal Article
SR Electronic
T1 Lower Radiation Dosing in Cardiac CT Angiography: The CONVERGE Registry
JF Journal of Nuclear Medicine Technology
JO J. Nucl. Med. Technol.
FD Society of Nuclear Medicine
SP 58
OP 62
DO 10.2967/jnmt.119.229500
VO 48
IS 1
A1 Madaj, Paul
A1 Li, Dong
A1 Nakanishi, Rine
A1 Andreini, Daniele
A1 Pontone, Gianluca
A1 Conte, Edoardo
A1 O’Rourke Franzcr, Rachael
A1 Hamilton-Craig, Christian
A1 Nimmagadda, Manojna
A1 Kim, Nicholas
A1 Fatima, Badiha
A1 Dailing, Christopher
A1 Budoff, Matthew J.
YR 2020
UL http://tech.snmjournals.org/content/48/1/58.abstract
AB Coronary artery disease is the leading cause of morbidity and mortality. Tools have been developed to accurately diagnose and evaluate coronary artery disease. Coronary CT angiography (CCTA) provides detailed imaging to deliver precise analysis and prognostic information. We sought to compare the radiation dose from a 256-detector-row CT scanner with that from a 64-detector-row CT scanner across a similar profile of patients. Methods: Consecutive patients were screened for the Converge Registry study and, after consenting to be included, were enrolled in accordance with an Institutional Review Board–approved protocol. A control group who underwent 64-row CCTA were matched by age, sex, and body mass index (BMI) with a group who underwent 256-row CCTA. Results: We compared 110 patients in each group. We found that mean dose–length product (DLP) was significantly lower in the 256-row group than in the 64-row group (P < 0.05). The radiation dose was reduced by 32% with use of the 256-row scanner for BMIs of 18.5–24.9 (DLP, 111.2 vs. 76.1 mGy-cm [1.56 vs. 1.07 mSv]; P < 0.05). For each BMI subgroup, there was a significant decrease in dose. Regression analysis found that with increasing BMIs, DLP significantly increased for both scanners. Conclusion: The 256-row scanner provided CCTA scans at significantly lower radiation doses than the 64-row scanner in different BMI groups, with all other variables accounted for. Lower radiation exposure along with lower contrast requirements can provide images with high diagnostic accuracy and less risk to the patient.