- Email: [email protected]
RADIATION DOSE REDUCTION IN PEDIATRIC CARDIAC COMPUTED TOMOGRAPHY: EXPERIENCE FROM A TERTIARY MEDICAL CENTER
E1356 JACC March 27, 2012 Volume 59, Issue 13
Imaging RADIATION DOSE REDUCTION IN PEDIATRIC CARDIAC COMPUTED TOMOGRAPHY: EXPERIENCE FROM A TERTIARY MEDICAL CENTER ACC Moderated Poster Contributions McCormick Place South, Hall A Saturday, March 24, 2012, 11:00 a.m.-Noon
Session Title: Imaging: CT - Radiation, Perfusion, Safety Abstract Category: 24. Imaging: CT Presentation Number: 1114-638 Authors: Leif-Christopher Engel, Manavjot Sidhu, Ashley Lee, Suhny Abbara, Manudeep Kalra, Thomas J. Brady, Udo Hoffmann, Brian Ghoshhajra, Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA Background: Cardiac CT angiography (cCTA) has become an established method for assessment of congenital heart disease. However, the potential harmful effects of ionizing radiation must be considered, particularly in younger, more radiosensitive patients. We sought to assess the temporal change in radiation doses from pediatric cCTA during an 8-year period at a tertiary medical center. Methods: This retrospective study consists of all patients between 6 months and 16 years who were referred to cCTA for assessment of congenital heart disease or Kawasaki disease from October 2003 to November 2011. During the study period 63 patients were scanned using 4 different scanner types: 16-slice MDCT, 64-slice MDCT, 64-slice DSCT, 128-slice DSCT. Radiation dose (mGy x cm) was stratified by age groups (0-6 years, 7-12 years, and 13-16 years) as well as scan mode (retrospective ECG gating [RGT] vs. high-pitch helical prospective ECG-triggering [HPPGT]). Results: With 128-DSCT (DLP 44.5 mGy x cm [16.5-79.0], median doses decreased by 36.9 %, 72 % and 3.3 % when compared to 16-slice MDCT (70.5 mGy x cm), 64-MDCT (159 mGy x cm) and 64-DSCT (46.0 mGy x cm) respectively (Figure 1 A). HPPGT (40.0 mGy x cm [16.0-73.0] was associated with significant lower radiation dose when compared to RGT (91.0 mGy x cm [45.3-228.5] (Figure 1B) Conclusions: cCTA can now be obtained at very low radiation doses in pediatric patients using the latest dual-source CT technology in combination with prospective ECG triggered high pitch helical acquisition.
Imaging RADIATION DOSE REDUCTION IN PEDIATRIC CARDIAC COMPUTED TOMOGRAPHY: EXPERIENCE FROM A TERTIARY MEDICAL CENTER ACC Moderated Poster Contributions McCormick Place South, Hall A Saturday, March 24, 2012, 11:00 a.m.-Noon
Session Title: Imaging: CT - Radiation, Perfusion, Safety Abstract Category: 24. Imaging: CT Presentation Number: 1114-638 Authors: Leif-Christopher Engel, Manavjot Sidhu, Ashley Lee, Suhny Abbara, Manudeep Kalra, Thomas J. Brady, Udo Hoffmann, Brian Ghoshhajra, Cardiac MR PET CT Program, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA Background: Cardiac CT angiography (cCTA) has become an established method for assessment of congenital heart disease. However, the potential harmful effects of ionizing radiation must be considered, particularly in younger, more radiosensitive patients. We sought to assess the temporal change in radiation doses from pediatric cCTA during an 8-year period at a tertiary medical center. Methods: This retrospective study consists of all patients between 6 months and 16 years who were referred to cCTA for assessment of congenital heart disease or Kawasaki disease from October 2003 to November 2011. During the study period 63 patients were scanned using 4 different scanner types: 16-slice MDCT, 64-slice MDCT, 64-slice DSCT, 128-slice DSCT. Radiation dose (mGy x cm) was stratified by age groups (0-6 years, 7-12 years, and 13-16 years) as well as scan mode (retrospective ECG gating [RGT] vs. high-pitch helical prospective ECG-triggering [HPPGT]). Results: With 128-DSCT (DLP 44.5 mGy x cm [16.5-79.0], median doses decreased by 36.9 %, 72 % and 3.3 % when compared to 16-slice MDCT (70.5 mGy x cm), 64-MDCT (159 mGy x cm) and 64-DSCT (46.0 mGy x cm) respectively (Figure 1 A). HPPGT (40.0 mGy x cm [16.0-73.0] was associated with significant lower radiation dose when compared to RGT (91.0 mGy x cm [45.3-228.5] (Figure 1B) Conclusions: cCTA can now be obtained at very low radiation doses in pediatric patients using the latest dual-source CT technology in combination with prospective ECG triggered high pitch helical acquisition.