Coronary artery abnormalities in Kawasaki disease: Comparison between CT and MR coronary angiography

Abstract

Although CTCA and MRCA show comparable assessibility in per-patient analysis, CTCA shows higher diagnostic performance than MRCA for evaluating coronary artery abnormalities in patients with Kawasaki disease.

Third-generation dual-source 70-kVp chest CT angiography with advanced iterative reconstruction in young children: image quality and radiation dose reduction

“…We achieved a reasonably low effective radiation dose of 0.36 mSv and the mean CTDI vol of 0.31 mGy using a high-pitch 70-kVp mode. These values are distinctively lower than those in some studies and similar to those in other studies [20,23,24,46,47]. We found no other study that compared [43].…”

“…Additionally, general image quality of cardiac structures and the great vessels was determined using the same scale b P < .05 was considered to be statistically significant 70-kVp third-generation and 80-kVp second-generation dual-source CT angiography in young children. However, several authors have published experiences with different CT scanners and protocols: Kim et al [47] described the potential to reduce mean effective dose for pediatric CT angiography from 6.1 mSv to 2.6 mSv and 2.1 mSv using 16-, 64-, and 128-slice CT scanners, performing retrospectively gated and prospectively triggered examinations. Ghoshhajra et al [23] evaluated 95 children and described a decline in median effective dose from 6.8 mSv to 1.0 mSv using a 128-slice dual-source CT scanner in comparison with a 64-slice scanner.…”

ECG-Synchronized CT Angiography in 324 Consecutive Pediatric Patients: Spectrum of Indications and Trends in Radiation Dose

“…Volume CT dose index was 24 mGy, dose-length product was 583 mGy*cm, and age-specific effective dose was 11 mSv Pediatr Cardiol (2015) 36:569-578 573 protection strategies in the adult population [2,4,9,10,20], which have univocally demonstrated drastic reductions in radiation dose from cardiac CT by the systematic and stringent implementation of quality measures and technical improvements, as they emerge. Our investigation is preceded by several published experiences in smaller cohorts: Kim and colleagues previously described a reduction in average ED for pediatric CTA from 6.1 to 2.6 and 2.1 mSv for 16-slice, 64-slice, and 128-slice CT systems, respectively, averaged over retrospectively gated and prospectively triggered examinations [13]. More recently, Ghoshhajra and colleagues analyzed a population of 95 pediatric patients and found a decline in median ED from 6.8 mSv with 64-slice CT to 1.0 mSv with 128-slice dual-source CT [7].…”

Role of imaging studies in Kawasaki disease

“…4 Radiation hazard with CTCA (and consequent risk of radiation-associated malignancy) remains a concern still even though it is much less than in the older generation scanners. Dose-saving strategies in CTCA include child-size bowtie filter, 5 body size-adapted protocol including low tube voltage techniques, 6 highpitch scanning (more overlap of scanned data), 7 electrocardiogram (ECG)-controlled and attenuation-based tube current modulations (CT exposure modifications with phase of ECG), 8 and prospective ECG-triggered sequential scanning (in which CT data are acquired only during a particular cardiac phase through synchronization of the X-ray tube and the ECG signal 9 ) and iterative image reconstruction methods. 10 Using the dose-saving strategies discussed above, radiation doses of CTCA have been brought to levels below 1 mSv.…”

“…Diagnostic performance of MRCA over CTCA is a matter of debate as some studies report lower diagnostic value, 6,16,17 while others report good correlation between MRCA and CTCA for detection of small aneurysms. 18,19 This has been attributed to lower spatial and temporal resolution, long scanning times and poorer image quality of MRCA compared to CTCA.…”