PT  - JOURNAL ARTICLE
AU  - Paul Madaj
AU  - Dong Li
AU  - Rine Nakanishi
AU  - Daniele Andreini
AU  - Gianluca Pontone
AU  - Edoardo Conte
AU  - Rachael O’Rourke Franzcr
AU  - Christian Hamilton-Craig
AU  - Manojna Nimmagadda
AU  - Nicholas Kim
AU  - Badiha Fatima
AU  - Christopher Dailing
AU  - Matthew J. Budoff
TI  - Lower Radiation Dosing in Cardiac CT Angiography: The CONVERGE Registry
AID  - 10.2967/jnmt.119.229500
DP  - 2020 Mar 01
TA  - Journal of Nuclear Medicine Technology
PG  - 58--62
VI  - 48
IP  - 1
4099  - http://tech.snmjournals.org/content/48/1/58.short
4100  - http://tech.snmjournals.org/content/48/1/58.full
SO  - J. Nucl. Med. Technol.2020 Mar 01; 48
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.