Dual-energy computed tomography arthrography of the shoulder joint using virtual monochromatic spectral imaging

Optimal dose of contrast agent and monochromatic energy level

Chansik An, Yong Min Chun, Sungjun Kim, Young Han Lee, Min Jeong Yun, Jinsuck Suh, Ho Taek Song

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)746-756
Number of pages11
JournalKorean journal of radiology
Volume15
Issue number6
DOIs
Publication statusPublished - 2014 Nov 1

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Arthrography
Shoulder Joint
Artifacts
Contrast Media
Tomography
Iodine
Bone and Bones

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

Cite this

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title = "Dual-energy computed tomography arthrography of the shoulder joint using virtual monochromatic spectral imaging: Optimal dose of contrast agent and monochromatic energy level",
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.",
author = "Chansik An and Chun, {Yong Min} and Sungjun Kim and Lee, {Young Han} and Yun, {Min Jeong} and Jinsuck Suh and Song, {Ho Taek}",
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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. / An, Chansik; Chun, Yong Min; Kim, Sungjun; Lee, Young Han; Yun, Min Jeong; Suh, Jinsuck; Song, Ho Taek.

In: Korean journal of radiology, Vol. 15, No. 6, 01.11.2014, p. 746-756.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dual-energy computed tomography arthrography of the shoulder joint using virtual monochromatic spectral imaging

T2 - Optimal dose of contrast agent and monochromatic energy level

AU - An, Chansik

AU - Chun, Yong Min

AU - Kim, Sungjun

AU - Lee, Young Han

AU - Yun, Min Jeong

AU - Suh, Jinsuck

AU - Song, Ho Taek

PY - 2014/11/1

Y1 - 2014/11/1

N2 - 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.

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