H J Brisse1, B Aubert. 1. Département d'Imagerie, Institut Curie, 26, rue d'Ulm, 75005 Paris. herve.brisse@curie.net
Abstract
PURPOSE: To evaluate current exposure levels from pediatric MDCT examinations in order to issue recommendations for the routine clinical practice that may be used for establishing future diagnostic reference levels (DRL). Materials and methods. A survey was conducted at hospital sites affiliated with the SFIPP (Société Francophone d'Imagerie Pédiatrique et Prénatale). Tube potential and volume computed tomography dose index (CTDI) vol. values were obtained for three age groups (1, 5 and 10 years) for typical scanning indications of eight anatomical regions. RESULTS: Twenty of 29 sites provided us with a copy of their protocols. All ages groups combined, 97% of protocols used a tension level < or =120 kVp. For age groups 1, 5 and 10 years respectively, the 75th percentiles of dose distributions were: 31, 39.5 and 49.5 mGy for the "head" protocol; 24, 22 and 24 mGy for "head and neck"; 11, 11, and 11 mGy for "paranasal sinuses"; 46, 71 and 87 mGy for "petrous bone"; 3, 3.5 and 5.5 mGy for "chest"; 2, 3 and 4 mGy for "low dose lung"; 4, 4.5 and 7 mGy for "abdomen-pelvis"; 7, 11 and 12 mGy for "bone". The inter-center discrepancy for doses were still high. CONCLUSION: This study provided an evaluation of current practices in reference centers for pediatric imaging and allowed readjustment of MDCT dose recommendations. It could help in the development of DRLS for pediatric MDCT.
PURPOSE: To evaluate current exposure levels from pediatric MDCT examinations in order to issue recommendations for the routine clinical practice that may be used for establishing future diagnostic reference levels (DRL). Materials and methods. A survey was conducted at hospital sites affiliated with the SFIPP (Société Francophone d'Imagerie Pédiatrique et Prénatale). Tube potential and volume computed tomography dose index (CTDI) vol. values were obtained for three age groups (1, 5 and 10 years) for typical scanning indications of eight anatomical regions. RESULTS: Twenty of 29 sites provided us with a copy of their protocols. All ages groups combined, 97% of protocols used a tension level < or =120 kVp. For age groups 1, 5 and 10 years respectively, the 75th percentiles of dose distributions were: 31, 39.5 and 49.5 mGy for the "head" protocol; 24, 22 and 24 mGy for "head and neck"; 11, 11, and 11 mGy for "paranasal sinuses"; 46, 71 and 87 mGy for "petrous bone"; 3, 3.5 and 5.5 mGy for "chest"; 2, 3 and 4 mGy for "low dose lung"; 4, 4.5 and 7 mGy for "abdomen-pelvis"; 7, 11 and 12 mGy for "bone". The inter-center discrepancy for doses were still high. CONCLUSION: This study provided an evaluation of current practices in reference centers for pediatric imaging and allowed readjustment of MDCT dose recommendations. It could help in the development of DRLS for pediatric MDCT.
Authors: Rebecca Smith-Bindman; Michelle Moghadassi; Nicole Wilson; Thomas R Nelson; John M Boone; Christopher H Cagnon; Robert Gould; David J Hall; Mayil Krishnam; Ramit Lamba; Michael McNitt-Gray; Anthony Seibert; Diana L Miglioretti Journal: Radiology Date: 2015-05-19 Impact factor: 11.105
Authors: D Jackson; K Atkin; F Bettenay; J Clark; M R Ditchfield; J E Grimm; R Linke; G Long; E Onikul; J Pereira; M Phillips; F Wilson; E Paul; S K Goergen Journal: Eur Radiol Date: 2015-06-03 Impact factor: 5.315