Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/5022
Título: Maintaining image quality for paediatric chest CTs while lowering dose: FBP versus SAFIRE
Autor: Borge, Synnøve
Campbell, Nina
Gomes, Ana
Raszkowski, Aysha M.
Rook, Jan Willem
Sanderud, Audun
Vallinga, Anique
Vouillamoz, Audrey
Buissink, Carst
Palavras-chave: Filtered back projection
Computed tomography
Paediatric patients
Image quality
Dose reduction
Data: 2015
Editora: Open Source, University of Salford
Citação: Borge S, Campbell N, Gomes A, Raszkowski AM, Rook JW, Sanderud A, et al. Maintaining image quality for paediatric chest CTs while lowering dose: FBP versus SAFIRE. In Hogg P, Lança L, editors. OPTIMAX 2014 – Radiation dose and image quality optimisation in medical imaging. Salford, UK: Open Source, University of Salford; 2015. p. 15-20.
Resumo: Objectives: Children have a greater risk from radiation, per unit dose, due to increased radiosensitivity and longer life expectancies. It is of paramount importance to reduce the radiation dose received by children. This research concerns chest CT examinations on paediatric patients. The purpose of this study was to compare the image quality and the dose received from imaging with images reconstructed with filtered back projection (FBP) and five strengths of Sinogram-Affirmed Iterative Reconstruction (SAFIRE). Methods: Using a multi-slice CT scanner, six series of images were taken of a paediatric phantom. Two kVp values (80 and 110), 3 mAs values (25, 50 and 100) and 2 slice thicknesses (1 mm and 3 mm) were used. All images were reconstructed with FBP and five strengths of SAFIRE. Ten observers evaluated visual image quality. Dose was measured using CT-Expo. Results: FBP required a higher dose than all SAFIRE strengths to obtain the same image quality for sharpness and noise. For sharpness and contrast image quality ratings of 4, FBP required doses of 6.4 and 6.8 mSv respectively. SAFIRE 5 required doses of 3.4 and 4.3 mSv respectively. Clinical acceptance rate was improved by the higher voltage (110 kV) for all images in comparison to 80 kV, which required a higher dose for acceptable image quality. 3 mm images were typically better quality than 1 mm images. Conclusion: SAFIRE 5 was optimal for dose reduction and image quality.
Peer review: yes
URI: http://hdl.handle.net/10400.21/5022
ISBN: 9781907842603
Versão do Editor: http://usir.salford.ac.uk/34439/
Aparece nas colecções:ESTeSL - Capítulos ou partes de livros

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