Possibilities of Reducing Radiation Dose in Computed Tomography Examinations in Various Age Groups Using an Iterative Model-Based Reconstruction Technique

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dc.contributor.authorČervinková, Ivanacs
dc.contributor.authorWalek, Petrcs
dc.contributor.authorJíra, Igorcs
dc.contributor.authorSkotáková, Jarmilacs
dc.contributor.authorŠenkyřík, Jancs
dc.contributor.authorOuředníček, Petrcs
dc.contributor.authorJan, Jiřícs
dc.coverage.issue4cs
dc.coverage.volume6cs
dc.date.accessioned2022-05-18T14:54:43Z
dc.date.available2022-05-18T14:54:43Z
dc.date.issued2016-11-04cs
dc.description.abstractAim: To determine whether iterative model-based reconstruction (IMR) technique can preserve computed tomography (CT) image quality when the radiation dose is reduced to 20% of the original value. Methods: CT examination of the neck, mediastinum, or stomach was performed using standard protocols with a Philips Healthcare MDCT 64. Fifty imaging studies were evaluated. The patient’s set was divided into three groups: Young, Preadolescent, and Adult. Four experienced evaluators assessed the CT scans reconstructed using filtered back projection (FBP) and IMR technique (using the L1BR, L2BR, and L2BSP levels) at a 100% dose and at a dose reduced by 80%. The dose was reduced by a decrease in milliampere seconds (mAs). Image noise, artifacts, anatomical details, sharpness, low-contrast resolution, general impression of the reconstructed image, possibility of influencing the description, and possibility of influencing the examination’s conclusion were assessed. FBP at 100% of mAs was always used as the basis for comparison. Decrease in a parameter meant a negative point score while an improvement was marked as positive. Subsequently, objective measurement of image quality was also performed. Results: The greatest improvement in image quality (relative to the quality of images reconstructed using FBP with 100% dose) was achieved using IMR L2BR reconstruction, which can be recommended as optimal. The IMR L2BR reconstruction method was statistically demonstrated to have the best performance among the tested methods in suppressing noise and artifacts. In relation to the selected indications, this method allows a reduction in dose by as much as 80%. The effect of IMR was less marked among the youngest patients than in the remaining two patient groups. Conclusion: The study demonstrated that use of the IMR technique preserves diagnostic indications even with a markedly reduced dose in CT examinations of the neck, thorax, and abdomen in various age groups.en
dc.formattextcs
dc.format.extent1-7cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPediatrics & Therapeutics. 2016, vol. 6, issue 4, p. 1-7.en
dc.identifier.doi10.4172/2161-0665.1000302cs
dc.identifier.issn2161-0665cs
dc.identifier.other131625cs
dc.identifier.urihttp://hdl.handle.net/11012/204288
dc.language.isoencs
dc.publisherOMICS Internationalcs
dc.relation.ispartofPediatrics & Therapeuticscs
dc.relation.urihttps://www.omicsonline.org/open-access/possibilities-of-reducing-radiation-dose-in-computed-tomography-examinations-in-various-age-groups-using-an-iterative-modelbased-r-2161-0665-1000302.php?aid=82592cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2161-0665/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectCT examinationen
dc.subjectFiltered back projectionen
dc.subjectIterative reconstruction techniqueen
dc.subjectNoiseen
dc.subjectRadiation dose reductionen
dc.titlePossibilities of Reducing Radiation Dose in Computed Tomography Examinations in Various Age Groups Using an Iterative Model-Based Reconstruction Techniqueen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-131625en
sync.item.dbtypeVAVen
sync.item.insts2022.05.18 16:54:43en
sync.item.modts2022.05.18 16:14:21en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav biomedicínského inženýrstvícs
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