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Tytuł:
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3D cone-beam CT of the ankle using a novel twin robotic X-ray system: Assessment of image quality and radiation dose.
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Autorzy:
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Grunz JP; Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany. Electronic address: Grunz_.
Kunz AS; Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany.
Gietzen CH; Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany.
Weng AM; Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany.
Veyhl-Wichmann M; Institute of Anatomy and Cell Biology, University of Würzburg, Würzburg, Germany.
Ergün S; Institute of Anatomy and Cell Biology, University of Würzburg, Würzburg, Germany.
Schmitt R; Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany; Department of Diagnostic and Interventional Radiology, Cardiovascular Center Bad Neustadt an der Saale, Bad Neustadt an der Saale, Germany.
Bley TA; Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany.
Gassenmaier T; Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany.
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Źródło:
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European journal of radiology [Eur J Radiol] 2019 Oct; Vol. 119, pp. 108659. Date of Electronic Publication: 2019 Sep 07.
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Typ publikacji:
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Comparative Study; Journal Article; Randomized Controlled Trial
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Język:
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English
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Imprint Name(s):
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Publication: Limerick : Elsevier Science Ireland Ltd
Original Publication: Stuttgart ; New York : Thieme, [c1981-
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MeSH Terms:
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Radiation Dosage*
Ankle Joint/*diagnostic imaging
Cone-Beam Computed Tomography/*standards
Robotics/*standards
Artifacts ; Cadaver ; Cone-Beam Computed Tomography/instrumentation ; Cone-Beam Computed Tomography/methods ; Equipment Design ; Humans ; Phantoms, Imaging ; Robotics/methods ; Signal-To-Noise Ratio ; Tomography Scanners, X-Ray Computed/standards ; X-Rays
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Contributed Indexing:
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Keywords: Ankle; Computed tomography; Cone-beam computed tomography; Radiation dosage; Twin robotic X-ray system
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Entry Date(s):
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Date Created: 20190915 Date Completed: 20191230 Latest Revision: 20191230
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Update Code:
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20240105
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DOI:
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10.1016/j.ejrad.2019.108659
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PMID:
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31520930
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Purpose: To evaluate image quality (IQ) and radiation dose in cone-beam computed tomography (CBCT) of the ankle using a novel twin robotic X-ray system.
Method: We examined 16 cadaveric ankles with standard-dose (FD) and low-dose (LD) protocols using the new system's CBCT mode. For comparison, we performed multi-slice CT imaging (MSCT) with a clinical protocol. Three radiologists assessed IQ, noise and artifacts in bone and soft tissue on a five-point Likert scale (1= poor IQ; strong noise or artifacts; 5= excellent IQ; minimal noise or artifacts). Volume CT dose indices (CTDI vol ) were calculated for radiation dose comparison between CBCT and MSCT.
Results: Overall IQ was described as very good or excellent by reader 1/2/3 in 62.5/87.5/56.3% of LD, 87.5/87.5/81.3% of FD and 100/87.5/87.5% of MSCT studies. Readers agreed that IQ was better in MSCT than LD (R1/R2/R3; p ≤ 0.008), two also found advantages of MSCT over FD (R1/R3; p ≤ 0.034). Soft tissue noise and artifacts were stronger in FD (all p ≤ 0.002) and LD (all p ≤ 0.001). In bone, artifacts and noise were also more severe in LD (all p < 0.001) and FD (all p ≤ 0.003). CTDI vol for clinical MSCT scans without dose modulation (15.0 ± 0.0 mGy) were higher than for FD (5.3 ± 1.0 mGy) and LD studies (2.9 ± 0.6 mGy; both p < 0.001).
Conclusions: Despite MSCT providing better overall IQ than the twin robotic X-ray system's CBCT mode, both cone-beam protocols offer very good IQ in most studies and are suitable for clinical ankle imaging. Standard-dose and especially low-dose CBCT studies deliver up to five times less radiation dose than MSCT imaging.
(Copyright © 2019 Elsevier B.V. All rights reserved.)
