DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yoo, Boyeol | ko |
dc.contributor.author | Son, Kihong | ko |
dc.contributor.author | Pua, Rizza | ko |
dc.contributor.author | Kim, Jinsung | ko |
dc.contributor.author | Solodov, Alexander | ko |
dc.contributor.author | Cho, Seungryong | ko |
dc.date.accessioned | 2017-01-13T05:05:11Z | - |
dc.date.available | 2022-06-02T21:00:51Z | - |
dc.date.created | 2016-12-28 | - |
dc.date.created | 2016-12-28 | - |
dc.date.issued | 2016-10 | - |
dc.identifier.citation | HEALTHCARE INFORMATICS RESEARCH, v.22, no.4, pp.316 - 325 | - |
dc.identifier.issn | 2093-3681 | - |
dc.identifier.uri | http://hdl.handle.net/10203/218754 | - |
dc.description.abstract | Objectives: With the increased use of computed tomography (CT) in clinics, dose reduction is the most important feature people seek when considering new CT techniques or applications. We developed an intensity-weighted region-of-interest (IWROI) imaging method in an exact half-fan geometry to reduce the imaging radiation dose to patients in cone-beam CT (CBCT) for image-guided radiation therapy (IGRT). While dose reduction is highly desirable, preserving the high-quality images of the ROI is also important for target localization in IGRT. Methods: An intensity-weighting (IW) filter made of copper was mounted in place of a bowtie filter on the X-ray tube unit of an on-board imager (OBI) system such that the filter can substantially reduce radiation exposure to the outer ROI. In addition to mounting the IW filter, the lead-blade collimation of the OBI was adjusted to produce an exact half-fan scanning geometry for a further reduction of the radiation dose. The chord-based rebinned backprojection-filtration (BPF) algorithm in circular CBCT was implemented for image reconstruction, and a humanoid pelvis phantom was used for the IWROI imaging experiment. Results: The IWROI image of the phantom was successfully reconstructed after beam-quality correction, and it was registered to the reference image within an acceptable level of tolerance. Dosimetric measurements revealed that the dose is reduced by approximately 61% in the inner ROI and by 73% in the outer ROI compared to the conventional bowtie filter-based half-fan scan. Conclusions: The IWROI method substantially reduces the imaging radiation dose and provides reconstructed images with an acceptable level of quality for patient setup and target localization. The proposed half-fan-based IWROI imaging technique can add a valuable option to CBCT in IGRT applications. | - |
dc.language | English | - |
dc.publisher | KOREAN SOC MEDICAL INFORMATICS | - |
dc.title | Half-fan-based intensity-weighted region-of-interest imaging for low-dose cone-beam CT in image-guided radiation therapy | - |
dc.type | Article | - |
dc.identifier.scopusid | 2-s2.0-84994480611 | - |
dc.type.rims | ART | - |
dc.citation.volume | 22 | - |
dc.citation.issue | 4 | - |
dc.citation.beginningpage | 316 | - |
dc.citation.endingpage | 325 | - |
dc.citation.publicationname | HEALTHCARE INFORMATICS RESEARCH | - |
dc.identifier.doi | 10.4258/hir.2016.22.4.316 | - |
dc.embargo.terms | 2017-04-02 | - |
dc.identifier.kciid | ART002163466 | - |
dc.contributor.localauthor | Cho, Seungryong | - |
dc.contributor.nonIdAuthor | Yoo, Boyeol | - |
dc.contributor.nonIdAuthor | Kim, Jinsung | - |
dc.contributor.nonIdAuthor | Solodov, Alexander | - |
dc.description.isOpenAccess | Y | - |
dc.type.journalArticle | Article | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.