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Maintaining image quality for paediatric chest CTs while lowering dose: FBP versus SAFIRE

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dc.contributor.authorBorge, Synnøve
dc.contributor.authorCampbell, Nina
dc.contributor.authorGomes, Ana
dc.contributor.authorRaszkowski, Aysha M.
dc.contributor.authorRook, Jan Willem
dc.contributor.authorSanderud, Audun
dc.contributor.authorVallinga, Anique
dc.contributor.authorVouillamoz, Audrey
dc.contributor.authorBuissink, Carst
dc.date.accessioned2015-08-27T13:44:48Z
dc.date.available2015-08-27T13:44:48Z
dc.date.issued2015
dc.description.abstractObjectives: 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.por
dc.identifier.citationBorge 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.por
dc.identifier.isbn9781907842603
dc.identifier.urihttp://hdl.handle.net/10400.21/5022
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherOpen Source, University of Salfordpor
dc.relation.publisherversionhttp://usir.salford.ac.uk/34439/por
dc.subjectFiltered back projectionpor
dc.subjectComputed tomographypor
dc.subjectPaediatric patientspor
dc.subjectChestpor
dc.subjectImage qualitypor
dc.subjectDose reductionpor
dc.subjectSAFIREpor
dc.titleMaintaining image quality for paediatric chest CTs while lowering dose: FBP versus SAFIREpor
dc.typebook part
dspace.entity.typePublication
oaire.citation.endPage20por
oaire.citation.startPage15por
rcaap.rightsopenAccesspor
rcaap.typebookPartpor

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