Feasibility of a Modified Cone-Beam CT Rotation Trajectory to Improve Liver Periphery Visualization during Transarterial Chemoembolization.

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Serval ID
serval:BIB_BE518700159D
Type
Article: article from journal or magazin.
Collection
Publications
Title
Feasibility of a Modified Cone-Beam CT Rotation Trajectory to Improve Liver Periphery Visualization during Transarterial Chemoembolization.
Journal
Radiology
Author(s)
Schernthaner R.E., Chapiro J., Sahu S., Withagen P., Duran R., Sohn J.H., Radaelli A., van der Bom I.M., Geschwind J.F., Lin M.
ISSN
1527-1315 (Electronic)
ISSN-L
0033-8419
Publication state
Published
Issued date
2015
Peer-reviewed
Oui
Volume
277
Number
3
Pages
833-841
Language
english
Notes
Publication types: Journal Article ; Research Support, N.I.H., ExtramuralPublication Status: ppublish
Abstract
PURPOSE: To compare liver coverage and tumor detectability by using preprocedural magnetic resonance (MR) images as a reference, as well as radiation exposure of cone-beam computed tomography (CT) with different rotational trajectories.
MATERIALS AND METHODS: Fifteen patients (nine men and six women; mean age ± standard deviation, 65 years ± 5) with primary or secondary liver cancer were retrospectively included in this institutional review board-approved study. A modified cone-beam CT protocol was used in which the C-arm rotates from +55° to -185° (open arc cone-beam CT) instead of -120° to +120° (closed arc cone-beam CT). Each patient underwent two sessions of transarterial chemoembolization between February 2013 and March 2014 with closed arc and open arc cone-beam CT (during the first and second transarterial chemoembolization sessions, respectively, as part of the institutional transarterial chemoembolization protocol). For each cone-beam CT examination, liver volume and tumor detectability were assessed by using MR images as the reference. Radiation exposure was compared by means of a phantom study. For statistical analysis, paired t tests and a Wilcoxon signed rank test were performed.
RESULTS: Mean liver volume imaged was 1695 cm(3) ± 542 and 1857 cm(3) ± 571 at closed arc and open arc cone-beam CT, respectively. The coverage of open arc cone-beam CT was significantly higher compared with closed arc cone-beam CT (97% vs 86% of the MR imaging liver volume, P = .002). In eight patients (53%), tumors were partially or completely outside the closed arc cone-beam CT field of view. All tumors were within the open arc cone-beam CT field of view. The open arc cone-beam CT radiation exposure by means of weighted CT index was slightly lower compared with that of closed arc cone-beam CT (-5.1%).
CONCLUSION: Open arc cone-beam CT allowed for a significantly improved intraprocedural depiction of peripheral hepatic tumors while achieving a slight radiation exposure reduction.
Keywords
Aged, Chemoembolization, Therapeutic/methods, Cone-Beam Computed Tomography/methods, Feasibility Studies, Female, Humans, Liver/radiography, Liver Neoplasms/therapy, Magnetic Resonance Imaging, Male, Radiation Exposure, Retrospective Studies, Rotation
Pubmed
Open Access
Yes
Create date
03/09/2015 10:18
Last modification date
20/08/2019 15:32
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