Bouchra Habib Geryes1, Raphael Calmon2,3, Diala Khraiche4,3, Nathalie Boddaert2,3, Damien Bonnet4,3, Francesca Raimondi5,6,7. 1. Direction de la qualité et de la gestion des risques, Hôpital Universitaire Necker Enfants Malades, 149, rue de Sèvres, 75743, Paris Cedex 15, France. 2. Service de Radiologie pédiatrique, Hôpital Universitaire Necker Enfants Malades, 149, rue de Sèvres, 75743, Paris Cedex 15, France. 3. Sorbonne Paris Cité, Université Paris Descartes, Paris, France. 4. Unité Médico-Chirurgicale de Cardiologie Congénitale et Pédiatrique, Centre de référence Malformations Cardiaques Congénitales Complexes - M3C, 149, rue de Sèvres, 75743, Paris Cedex 15, France. 5. Service de Radiologie pédiatrique, Hôpital Universitaire Necker Enfants Malades, 149, rue de Sèvres, 75743, Paris Cedex 15, France. francesca.raimondi@nck.aphp.fr. 6. Unité Médico-Chirurgicale de Cardiologie Congénitale et Pédiatrique, Centre de référence Malformations Cardiaques Congénitales Complexes - M3C, 149, rue de Sèvres, 75743, Paris Cedex 15, France. francesca.raimondi@nck.aphp.fr. 7. Sorbonne Paris Cité, Université Paris Descartes, Paris, France. francesca.raimondi@nck.aphp.fr.
Abstract
OBJECTIVES: To assess the impact of different protocols on radiation dose and image quality for paediatric coronary computed tomography (cCT). MATERIALS AND METHODS: From January-2012 to June-2014, 140 children who underwent cCT on a 64-slice scanner were included. Two consecutive changes in imaging protocols were performed: 1) the use of adaptive statistical iterative reconstruction (ASIR); 2) the optimization of acquisition parameters. Effective dose (ED) was calculated by conversion of the dose-length product. Image quality was assessed as excellent, good or with significant artefacts. RESULTS: Patients were divided in three age groups: 0-4, 5-7 and 8-18 years. The use of ASIR combined to the adjustment of scan settings allowed a reduction in the median ED of 58 %, 82 % and 85 % in 0-4, 5-7 and 8-18 years group, respectively (7.3 ± 1.4 vs 3.1 ± 0.7 mSv, 5.5 ± 1.6 vs 1 ± 1.9 mSv and 5.3 ± 5.0 vs 0.8 ± 2.0 mSv, all p < 0,05). Prospective protocol was used in 51 % of children. The reduction in radiation dose was not associated with reduction in diagnostic image quality as assessed by the frequency of coronary segments with excellent or good image quality (88 %). CONCLUSIONS: cCT can be obtained at very low radiation doses in children using ASIR, and prospective acquisition with optimized imaging parameters. KEY POINTS: • Using ASIR allows 25 % to 41 % reduction in the ED. • Prospective protocol is used up to 51 % of children after premedication. • Low dose is possible using ASIR and optimized prospective paediatric cCT.
OBJECTIVES: To assess the impact of different protocols on radiation dose and image quality for paediatric coronary computed tomography (cCT). MATERIALS AND METHODS: From January-2012 to June-2014, 140 children who underwent cCT on a 64-slice scanner were included. Two consecutive changes in imaging protocols were performed: 1) the use of adaptive statistical iterative reconstruction (ASIR); 2) the optimization of acquisition parameters. Effective dose (ED) was calculated by conversion of the dose-length product. Image quality was assessed as excellent, good or with significant artefacts. RESULTS:Patients were divided in three age groups: 0-4, 5-7 and 8-18 years. The use of ASIR combined to the adjustment of scan settings allowed a reduction in the median ED of 58 %, 82 % and 85 % in 0-4, 5-7 and 8-18 years group, respectively (7.3 ± 1.4 vs 3.1 ± 0.7 mSv, 5.5 ± 1.6 vs 1 ± 1.9 mSv and 5.3 ± 5.0 vs 0.8 ± 2.0 mSv, all p < 0,05). Prospective protocol was used in 51 % of children. The reduction in radiation dose was not associated with reduction in diagnostic image quality as assessed by the frequency of coronary segments with excellent or good image quality (88 %). CONCLUSIONS: cCT can be obtained at very low radiation doses in children using ASIR, and prospective acquisition with optimized imaging parameters. KEY POINTS: • Using ASIR allows 25 % to 41 % reduction in the ED. • Prospective protocol is used up to 51 % of children after premedication. • Low dose is possible using ASIR and optimized prospective paediatric cCT.
Authors: Christopher Herzog; Denise M Mulvihill; Shaun A Nguyen; Giancarlo Savino; Bernhard Schmidt; Philip Costello; Thomas J Vogl; U Joseph Schoepf Journal: AJR Am J Roentgenol Date: 2008-05 Impact factor: 3.959
Authors: Annemarie M den Harder; Dominika Suchá; Pieter J van Doormaal; Ricardo P J Budde; Pim A de Jong; Arnold M R Schilham; Johannes M P J Breur; Tim Leiner Journal: PLoS One Date: 2017-04-14 Impact factor: 3.240
Authors: Jacinta E Browne; Michael R Bruesewitz; Vrieze Thomas; Kristen B Thomas; Nathan C Hull; Cynthia H McCollough; Lifeng Yu Journal: J Appl Clin Med Phys Date: 2020-12-18 Impact factor: 2.102
Authors: Theodor Adla; Martin Kočí; Vojtěch Suchánek; Zuzana Šalagovičová; Michal Polovinčák; Lukáš Mikšík; Jan Janoušek; Miloslav Roček Journal: Children (Basel) Date: 2022-08-05