Radiation dose reduction in pediatric cardiac computed tomography

Experience from a tertiary medical center

Brian B. Ghoshhajra, Ashley M. Lee, Leif Christopher Engel, Csilla Celeng, Mannudeep K. Kalra, Thomas J. Brady, Udo Hoffmann, Sjirk J. Westra, Suhny Abbara

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Cardiac CT angiography (cCTA) has become an established method for the assessment of congenital heart disease. However, the potential harmful effects of ionizing radiation must be considered, particularly in younger, more radiosensitive patients. In this study, we sought to assess the temporal change in radiation doses from pediatric cCTA during an 8-year period at a tertiary medical center. This retrospective study included all patients ≤18 years old who were referred to electrocardiography (ECG)-gated cCTA for the assessment of congenital heart disease or inflammatory disease (Kawasaki disease) from November 2004 to September 2012. During the study period, 95 patients were scanned using 3 different scanner models - 64-slice multidetector CT (64-MDCT) and first- (64-DSCT) and second-generation (128-DSCT) dual-source CT - and 3 scan protocols - retrospective ECG-gated helical scanning (RG), prospective ECG-triggered axial scanning (PT), or prospective ECG-triggered high-pitch helical scanning (HPH). Effective dose (ED) was calculated with the dose length product method with a conversion factor (k) adjusted for age. ED was then compared among scan protocols. Image quality was extracted from clinical cCTA reports when available. Overall, 94 % of scans were diagnostic (80 % for 64-slice MDCT, 93 % for 64-slice DSCT, and 97 % for 128-slice DSCT).With 128-DSCT, median ED (1.0 [range 0.6-2.0] mSv) decreased by 85.8 % and 66.8 % compared with 64-MDCT (6.8 [range 2.9-13.6] mSv) and 64-DSCT (2.9 [range 0.9-4.1] mSv), respectively. With HPH, median ED (0.9 [range 0.6-1.8] mSv) decreased by 59.4 % and 85.4 % compared with PT (2.2 [range 0.9-3.4] mSv) and RG (6.1 [range 2.5-10.6] mSv). 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 HPH acquisition.

Original languageEnglish (US)
Pages (from-to)171-179
Number of pages9
JournalPediatric Cardiology
Volume35
Issue number1
DOIs
StatePublished - Jan 2014

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Electrocardiography
Tomography
Radiation
Pediatrics
Heart Diseases
Mucocutaneous Lymph Node Syndrome
Ionizing Radiation
Retrospective Studies
Computed Tomography Angiography
Technology

Keywords

  • Cardiac computed tomography angiography
  • Children
  • Low dose
  • Pediatrics
  • Radiation

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Pediatrics, Perinatology, and Child Health

Cite this

Radiation dose reduction in pediatric cardiac computed tomography : Experience from a tertiary medical center. / Ghoshhajra, Brian B.; Lee, Ashley M.; Engel, Leif Christopher; Celeng, Csilla; Kalra, Mannudeep K.; Brady, Thomas J.; Hoffmann, Udo; Westra, Sjirk J.; Abbara, Suhny.

In: Pediatric Cardiology, Vol. 35, No. 1, 01.2014, p. 171-179.

Research output: Contribution to journalArticle

Ghoshhajra, BB, Lee, AM, Engel, LC, Celeng, C, Kalra, MK, Brady, TJ, Hoffmann, U, Westra, SJ & Abbara, S 2014, 'Radiation dose reduction in pediatric cardiac computed tomography: Experience from a tertiary medical center', Pediatric Cardiology, vol. 35, no. 1, pp. 171-179. https://doi.org/10.1007/s00246-013-0758-5
Ghoshhajra, Brian B. ; Lee, Ashley M. ; Engel, Leif Christopher ; Celeng, Csilla ; Kalra, Mannudeep K. ; Brady, Thomas J. ; Hoffmann, Udo ; Westra, Sjirk J. ; Abbara, Suhny. / Radiation dose reduction in pediatric cardiac computed tomography : Experience from a tertiary medical center. In: Pediatric Cardiology. 2014 ; Vol. 35, No. 1. pp. 171-179.
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