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A comparison of Sinogram Affirmed Iterative Reconstruction and filtered back projection on image quality and dose reduction in paediatric head CT: a phantom study

2015Book part Open access
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dc.contributor.authorAhmed, Abdulfatah
dc.contributor.authorGarcia, André
dc.contributor.authorBakker, Astrid
dc.contributor.authorTomkinson, David
dc.contributor.authorSalamin, Julie
dc.contributor.authorde Lange, René
dc.contributor.authorBuyvidovich, Serguey A.
dc.contributor.authorSohrabi, Tina
dc.contributor.authorDominguez, Alexandre
dc.contributor.authorCampeanu, Cosmin
dc.contributor.authorPlasman, Paul
dc.date.accessioned2015-08-27T14:15:08Z
dc.date.available2015-08-27T14:15:08Z
dc.date.issued2015
dc.description.abstractBackground: Computed tomography (CT) is one of the most used modalities for diagnostics in paediatric populations, which is a concern as it also delivers a high patient dose. Research has focused on developing computer algorithms that provide better image quality at lower dose. The iterative reconstruction algorithm Sinogram-Affirmed Iterative Reconstruction (SAFIRE) was introduced as a new technique that reduces noise to increase image quality. Purpose: The aim of this study is to compare SAFIRE with the current gold standard, Filtered Back Projection (FBP), and assess whether SAFIRE alone permits a reduction in dose while maintaining image quality in paediatric head CT. Methods: Images were collected using a paediatric head phantom using a SIEMENS SOMATOM PERSPECTIVE 128 modulated acquisition. 54 images were reconstructed using FBP and 5 different strengths of SAFIRE. Objective measures of image quality were determined by measuring SNR and CNR. Visual measures of image quality were determined by 17 observers with different radiographic experiences. Images were randomized and displayed using 2AFC; observers scored the images answering 5 questions using a Likert scale. Results: At different dose levels, SAFIRE significantly increased SNR (up to 54%) in the acquired images compared to FBP at 80kVp (5.2-8.4), 110kVp (8.2-12.3), 130kVp (8.8-13.1). Visual image quality was higher with increasing SAFIRE strength. The highest image quality was scored with SAFIRE level 3 and higher. Conclusion: The SAFIRE algorithm is suitable for image noise reduction in paediatric head CT. Our data demonstrates that SAFIRE enhances SNR while reducing noise with a possible reduction of dose of 68%.por
dc.identifier.citationAhmed A, Garcia A, Bakker A, Tomkinson D, Salamin J, Lange R, et al. A comparison of sinogram affirmed iterative reconstruction and filtered back projection on image quality and dose reduction in paediatric head CT: a phantom study. 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. 27-36.por
dc.identifier.isbn9781907842603
dc.identifier.urihttp://hdl.handle.net/10400.21/5024
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherOpen Source, University of Salfordpor
dc.relation.publisherversionhttp://usir.salford.ac.uk/34439/por
dc.subjectSinogram-affirmed iterative reconstructionpor
dc.subjectFiltered back projectionpor
dc.subjectDose reductionpor
dc.subjectPaediatric patientspor
dc.subjectComputed tomographypor
dc.subjectImage qualitypor
dc.titleA comparison of Sinogram Affirmed Iterative Reconstruction and filtered back projection on image quality and dose reduction in paediatric head CT: a phantom studypor
dc.typebook part
dspace.entity.typePublication
oaire.citation.endPage36por
oaire.citation.startPage27por
rcaap.rightsopenAccesspor
rcaap.typebookPartpor

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