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Dual-energy computed tomography arthrography of the shoulder joint using virtual monochromatic spectral imaging: optimal dose of contrast agent and monochromatic energy level.

Authors
 Chansik An  ;  Yong Min Chun  ;  Sungjun Kim  ;  Young Han Lee  ;  Min Jeong Yun  ;  Jin Suck Suh  ;  Ho Taek Song 
Citation
 KOREAN JOURNAL OF RADIOLOGY, Vol.15(6) : 746-756, 2014 
Journal Title
 KOREAN JOURNAL OF RADIOLOGY 
ISSN
 1229-6929 
Issue Date
2014
MeSH
Analysis of Variance ; Artifacts ; Contrast Media* ; Female ; Humans ; Male ; Middle Aged ; Phantoms, Imaging ; Shoulder Joint/diagnostic imaging* ; Shoulder Joint/pathology ; Signal-To-Noise Ratio ; Tomography, X-Ray Computed*
Keywords
Dual energy computed tomography ; Gemstone spectral imaging ; Shoulder arthrography
Abstract
OBJECTIVE: To optimize the dose of contrast agent and the level of energy for dual-energy computed tomography (DECT) arthrography of the shoulder joint and to evaluate the benefits of the optimized imaging protocol. MATERIALS AND METHODS: Dual-energy scans with monochromatic spectral imaging mode and conventional single energy scans were performed on a shoulder phantom with 10 concentrations from 0 to 210 mg/mL of iodinated contrast medium at intervals of 15 or 30 mg/mL. Image noise, tissue contrast, and beam hardening artifacts were assessed to determine the optimum dose of contrast agent and the level of monochromatic energy for DECT shoulder arthrography in terms of the lowest image noise and the least beam hardening artifacts while good tissue contrast was maintained. Material decomposition (MD) imaging for bone-iodine differentiation was qualitatively assessed. The optimized protocol was applied and evaluated in 23 patients. RESULTS: The optimal contrast dose and energy level were determined by the phantom study at 60 mg/mL and 72 keV, respectively. This optimized protocol for human study reduced the image noise and the beam-hardening artifacts by 35.9% and 44.5%, respectively. Bone-iodine differentiation by MD imaging was not affected by the iodine concentration or level of energy. CONCLUSION: Dual-energy scan with monochromatic spectral imaging mode results in reduced image noise and beam hardening artifacts.
Files in This Item:
T201405071.pdf Download
DOI
10.3348/kjr.2014.15.6.746
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Sungjun(김성준) ORCID logo https://orcid.org/0000-0002-7876-7901
Suh, Jin Suck(서진석) ORCID logo https://orcid.org/0000-0001-9455-9240
Song, Ho Taek(송호택) ORCID logo https://orcid.org/0000-0002-6655-2575
An, Chansik(안찬식) ORCID logo https://orcid.org/0000-0002-0484-6658
Lee, Young Han(이영한) ORCID logo https://orcid.org/0000-0002-5602-391X
Chun, Yong Min(천용민) ORCID logo https://orcid.org/0000-0002-8147-6136
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/138609
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