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Tytuł pozycji:

Usefulness of model-based iterative reconstruction in low-dose lumbar spine CT after spine surgery with metal implant: a phantom study.

Tytuł:
Usefulness of model-based iterative reconstruction in low-dose lumbar spine CT after spine surgery with metal implant: a phantom study.
Autorzy:
Fukushima Y; Division of Clinical Radiology Service, Kyoto University Hospital, Kyoto, Japan.
Matsuda A; Division of Clinical Radiology Service, Kyoto University Hospital, Kyoto, Japan.
Koizumi K; Division of Clinical Radiology Service, Kyoto University Hospital, Kyoto, Japan.
Honda M; Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Masamoto K; Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Fujibayashi S; Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Źródło:
Acta radiologica (Stockholm, Sweden : 1987) [Acta Radiol] 2021 Oct; Vol. 62 (10), pp. 1333-1340. Date of Electronic Publication: 2020 Oct 05.
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Publication: Dec. 2012- : London : Sage
Original Publication: Stockholm, Sweden : Acta Radiologica, [1987-
MeSH Terms:
Prostheses and Implants*
Image Processing, Computer-Assisted/*methods
Spine/*diagnostic imaging
Spine/*surgery
Tomography, X-Ray Computed/*methods
Humans ; Lumbar Vertebrae/diagnostic imaging ; Metals ; Phantoms, Imaging
Contributed Indexing:
Keywords: X-ray computed tomography; image reconstruction; lumbar vertebrae; metal artifact; radiation dose; spine
Substance Nomenclature:
0 (Metals)
Entry Date(s):
Date Created: 20201006 Date Completed: 20211018 Latest Revision: 20211018
Update Code:
20240105
DOI:
10.1177/0284185120961424
PMID:
33019801
Czasopismo naukowe
Background: The major problems of computed tomography (CT) imaging include radiation exposure and severe artifacts caused by operative implants.
Purpose: To evaluate the usefulness of the metal artifact reduction algorithm and model-based iterative reconstruction (MBIR) in postoperative low-dose (LD) spine CT.
Material and Methods: A CT torso phantom was scanned at standard-dose (SD) and LD settings. The CT images were reconstructed by three methods: hybrid iterative reconstruction (HIR); metal artifact reduction; and MBIR. The radiation dose of the phantom imaging was evaluated by volume CT dose index (mGy), dose length product (DLP, mGy × cm), and effective dose (mSv). The image quality of the six images was visually evaluated and analyzed using Scheffe's paired comparison method. The average preference of each method was calculated based on the comparative scores. The task transfer function (TTF) and noise power spectrum for HIR and MBIR were also measured.
Results: The respective radiation-dose-related parameters of the SD and LD conditions were: volume CT dose index = 10.2 and 1.2 mGy; DLP = 277.9 and 33.9 mGy × cm; and effective dose = 4.2 and 0.5 mSv. The average preference for diagnostic acceptability of MBIR at LD was not significantly different from the other reconstructions of SD data. MBIR successfully reduced metal artifacts in the LD condition. The 10% TTF was higher for HIR at SD and higher for MBIR at LD.
Conclusion: MBIR is useful for LD spine CT after spine surgery with metal implant.

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