DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cho, Sanghoon | ko |
dc.contributor.author | Lee, Seoyoung | ko |
dc.contributor.author | Lee, Jongha | ko |
dc.contributor.author | Lee, Donghyeon | ko |
dc.contributor.author | Kim, Hyoyi | ko |
dc.contributor.author | Ryu, Jong-Hyun | ko |
dc.contributor.author | Jeong, Kilhwan | ko |
dc.contributor.author | Kim, Kyu-Gyum | ko |
dc.contributor.author | Yoon, Kwon-Ha | ko |
dc.contributor.author | Cho, Seungryong | ko |
dc.date.accessioned | 2021-03-18T02:50:06Z | - |
dc.date.available | 2021-03-18T02:50:06Z | - |
dc.date.created | 2021-01-25 | - |
dc.date.created | 2021-01-25 | - |
dc.date.created | 2021-01-25 | - |
dc.date.created | 2021-01-25 | - |
dc.date.created | 2021-01-25 | - |
dc.date.issued | 2021-03 | - |
dc.identifier.citation | IEEE TRANSACTIONS ON MEDICAL IMAGING, v.40, no.3, pp.1007 - 1020 | - |
dc.identifier.issn | 0278-0062 | - |
dc.identifier.uri | http://hdl.handle.net/10203/281672 | - |
dc.description.abstract | CT scan by use of a beam-filter placed between the x-ray source and the patient allows a single-scan low-dose dual-energy imaging with a minimal hardware modification to the existing CT systems. We have earlier demonstrated the feasibility of such imaging method with a multi-slit beam-filter reciprocating along the direction perpendicular to the CT rotation axis in a cone-beam CT system. However, such method would face mechanical challenges when the beam-filter is supposed to cooperate with a fast-rotating gantry in a diagnostic CT system. In this work, we propose a new scanning method and associated image reconstruction algorithm that can overcome these challenges. We propose to slide a beam-filter that has multi-slit structure with its slits being at a slanted angle with the CT gantry rotation axis during a scan. A streaky pattern would show up in the sinogram domain as a result. Using a notch filter in the Fourier domain of the sinogram, we removed the streaks and reconstructed an image by use of the filtered-backprojection algorithm. The remaining image artifacts were suppressed by applying l0 norm based smoothing. Using this image as a prior, we have reconstructed low- and high-energy CT images in the iterative reconstruction framework. An image-based material decomposition then followed. We conducted a simulation study to test its feasibility using the XCAT phantom and also an experimental study using the Catphan phantom, a head phantom, an iodine-solution phantom, and a monkey in anesthesia, and showed its successful performance in image reconstruction and in material decomposition. | - |
dc.language | English | - |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | - |
dc.title | A novel low-dose dual-energy imaging method for a fast-rotating gantry-type CT scanner | - |
dc.type | Article | - |
dc.identifier.wosid | 000626332400020 | - |
dc.identifier.scopusid | 2-s2.0-85098778515 | - |
dc.type.rims | ART | - |
dc.citation.volume | 40 | - |
dc.citation.issue | 3 | - |
dc.citation.beginningpage | 1007 | - |
dc.citation.endingpage | 1020 | - |
dc.citation.publicationname | IEEE TRANSACTIONS ON MEDICAL IMAGING | - |
dc.identifier.doi | 10.1109/TMI.2020.3044357 | - |
dc.contributor.localauthor | Cho, Seungryong | - |
dc.contributor.nonIdAuthor | Lee, Jongha | - |
dc.contributor.nonIdAuthor | Lee, Donghyeon | - |
dc.contributor.nonIdAuthor | Kim, Hyoyi | - |
dc.contributor.nonIdAuthor | Ryu, Jong-Hyun | - |
dc.contributor.nonIdAuthor | Jeong, Kilhwan | - |
dc.contributor.nonIdAuthor | Kim, Kyu-Gyum | - |
dc.contributor.nonIdAuthor | Yoon, Kwon-Ha | - |
dc.description.isOpenAccess | Y | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Low-dose CT | - |
dc.subject.keywordAuthor | dual-energy CT | - |
dc.subject.keywordAuthor | CT image Reconstruction | - |
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