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Impact of iterative...
Impact of iterative reconstruction on image quality of low-dose CT of the lumbar spine
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- Alshamari, Muhammed, 1975- (author)
- Örebro University,Örebro universitet,Institutionen för medicinska vetenskaper,Region Örebro län,Department of Radiology, Örebro University Hospital, Örebro, Sweden
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- Geijer, Mats, 1957- (author)
- Örebro University,Lund University,Lunds universitet,Örebro universitet,Institutionen för medicinska vetenskaper,Region Örebro län,Department of Radiology, Örebro University Hospital, Örebro, Sweden; Department of Medical Imaging and Physiology, Skåne University Hospital, Lund University, Lund, Sweden,Diagnostisk radiologi, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Diagnostic Radiology, (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine
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- Norrman, Eva, 1966- (author)
- Örebro University,Örebro universitet,Institutionen för medicinska vetenskaper,Region Örebro län,Department of Medical Physics, Örebro University Hospital, Örebro, Sweden
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- Lidén, Mats, 1976- (author)
- Örebro University,Örebro universitet,Institutionen för medicinska vetenskaper,Region Örebro län,Department of Radiology, Örebro University Hospital, Örebro, Sweden
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- Krauss, Wolfgang, 1973- (author)
- Örebro University,Örebro universitet,Institutionen för medicinska vetenskaper,Region Örebro län,Department of Radiology, Örebro University Hospital, Örebro, Sweden
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- Jendeberg, Johan, 1972- (author)
- Örebro University,Örebro universitet,Institutionen för medicinska vetenskaper,Region Örebro län,Department of Radiology, Örebro University Hospital, Örebro, Sweden
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- Magnuson, Anders (author)
- Örebro University
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- Geijer, Håkan, 1961- (author)
- Örebro University,Örebro universitet,Institutionen för medicinska vetenskaper,Region Örebro län,Department of Radiology, Örebro University Hospital, Örebro, Sweden
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(creator_code:org_t)
- 2016-11-14
- 2017
- English.
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In: Acta Radiologica. - London : Sage Publications. - 0284-1851 .- 1600-0455. ; 58:6, s. 702-709
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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Abstract
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- Background: Iterative reconstruction (IR) is a recent reconstruction algorithm for computed tomography (CT) that can be used instead of the standard algorithm, filtered back projection (FBP), to reduce radiation dose and/or improve image quality.Purpose: To evaluate and compare the image quality of low-dose CT of the lumbar spine reconstructed with IR to conventional FBP, without further reduction of radiation dose.Material and Methods: Low-dose CT on 55 patients was performed on a Siemens scanner using 120 kV tube voltage, 30 reference mAs, and automatic dose modulation. From raw CT data, lumbar spine CT images were reconstructed with a medium filter (B41f) using FBP and four levels of IR (levels 2-5). Five reviewers scored all images on seven image quality criteria according to the European guidelines on quality criteria for CT, using a five-grade scale. A side-by-side comparison was also performed.Results: There was significant improvement in image quality for IR (levels 2-4) compared to FBP. According to visual grading regression, odds ratios of all criteria with 95% confidence intervals for IR2, IR3, IR4, and IR5 were: 1.59 (1.39-1.83), 1.74 (1.51-1.99), 1.68 (1.46-1.93), and 1.08 (0.94-1.23), respectively. In the side-by-side comparison of all reconstructions, images with IR (levels 2-4) received the highest scores. The mean overall CTDIvol was 1.70 mGy (SD 0.46; range, 1.01-3.83 mGy). Image noise decreased in a linear fashion with increased strength of IR.Conclusion: Iterative reconstruction at levels 2, 3, and 4 improves image quality of low-dose CT of the lumbar spine compared to FPB.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk bildbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Image Processing (hsv//eng)
Keyword
- X-ray computed tomography (CT)
- image manipulation/reconstruction
- lumbar vertebrae
- radiation dosage
- spine
- Journal Article
Publication and Content Type
- ref (subject category)
- art (subject category)
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Alshamari, Muham ...
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Geijer, Mats, 19 ...
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Norrman, Eva, 19 ...
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Lidén, Mats, 197 ...
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Krauss, Wolfgang ...
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Jendeberg, Johan ...
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Magnuson, Anders
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Geijer, Håkan, 1 ...
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Clinical Medicin ...
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and Radiology Nuclea ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Medical Engineer ...
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and Medical Image Pr ...
- Articles in the publication
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Acta Radiologica
- By the university
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Örebro University
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Lund University