Absolute-delay multiphase reconstruction reduces prosthetic valve-related and atrial fibrillation-related artifacts at cardiac CT

Young Joo Suh, Dong Jin Im, Yoo Jin Hong, Hye Jeong Lee, Jin Hur, Byoung Wook Choi, Youngjin Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

OBJECTIVE. The objective of our study was to compare the image quality of cardiac CT images of mechanical valves in patients with irregular heart rates (HRs) using absolute-delay multiphase reconstruction versus relative-delay multiphase reconstruction. MATERIALS AND METHODS. A total of 26 patients with 40 mechanical valves who had atrial fibrillation during CT were included. The image quality of the CT scans was assessed for the subvalvular and valvular regions on a 4-point scale. The paired t test or Wilcoxon signed rank test was used to compare image quality scores between the relative-delay and absolute-delay reconstruction techniques. The overall image quality score was determined as the mean of the valvular and subvalvular region scores. RESULTS. For valvular regions, the image quality scores were 2.93 ± 0.73 (mean ± SD) for the relative-delay reconstruction technique and 3.55 ± 0.60 for the absolute-delay reconstruction technique (p < 0.0001). For subvalvular regions, the image quality scores were 2.8 ± 2.80 ± 0.79 and 3.35 ± 0.66 for the relative-and absolute-delay reconstructions (p < 0.0001), respectively. The nondiagnostic image quality group consisted of relative-delay reconstruction images of three valves (7.5%); the image quality scores for the absolute-delay reconstruction images of all three valves were improved, and the absolute-delay reconstruction images of the three valves were of diagnostic quality (p < 0.0001). CONCLUSION. Absolute-delay multiphase reconstruction can impGrant: rove CT image quality of mechanical valves in patients with an irregular HR compared with relative-delay reconstruction.

Original languageEnglish
Pages (from-to)W160-W167
JournalAmerican Journal of Roentgenology
Volume208
Issue number5
DOIs
Publication statusPublished - 2017 May 1

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Computer-Assisted Image Processing
Artifacts
Atrial Fibrillation
Heart Rate
Nonparametric Statistics

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

Cite this

Suh, Young Joo ; Im, Dong Jin ; Hong, Yoo Jin ; Lee, Hye Jeong ; Hur, Jin ; Choi, Byoung Wook ; Kim, Youngjin. / Absolute-delay multiphase reconstruction reduces prosthetic valve-related and atrial fibrillation-related artifacts at cardiac CT. In: American Journal of Roentgenology. 2017 ; Vol. 208, No. 5. pp. W160-W167.
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abstract = "OBJECTIVE. The objective of our study was to compare the image quality of cardiac CT images of mechanical valves in patients with irregular heart rates (HRs) using absolute-delay multiphase reconstruction versus relative-delay multiphase reconstruction. MATERIALS AND METHODS. A total of 26 patients with 40 mechanical valves who had atrial fibrillation during CT were included. The image quality of the CT scans was assessed for the subvalvular and valvular regions on a 4-point scale. The paired t test or Wilcoxon signed rank test was used to compare image quality scores between the relative-delay and absolute-delay reconstruction techniques. The overall image quality score was determined as the mean of the valvular and subvalvular region scores. RESULTS. For valvular regions, the image quality scores were 2.93 ± 0.73 (mean ± SD) for the relative-delay reconstruction technique and 3.55 ± 0.60 for the absolute-delay reconstruction technique (p < 0.0001). For subvalvular regions, the image quality scores were 2.8 ± 2.80 ± 0.79 and 3.35 ± 0.66 for the relative-and absolute-delay reconstructions (p < 0.0001), respectively. The nondiagnostic image quality group consisted of relative-delay reconstruction images of three valves (7.5{\%}); the image quality scores for the absolute-delay reconstruction images of all three valves were improved, and the absolute-delay reconstruction images of the three valves were of diagnostic quality (p < 0.0001). CONCLUSION. Absolute-delay multiphase reconstruction can impGrant: rove CT image quality of mechanical valves in patients with an irregular HR compared with relative-delay reconstruction.",
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Absolute-delay multiphase reconstruction reduces prosthetic valve-related and atrial fibrillation-related artifacts at cardiac CT. / Suh, Young Joo; Im, Dong Jin; Hong, Yoo Jin; Lee, Hye Jeong; Hur, Jin; Choi, Byoung Wook; Kim, Youngjin.

In: American Journal of Roentgenology, Vol. 208, No. 5, 01.05.2017, p. W160-W167.

Research output: Contribution to journalArticle

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T1 - Absolute-delay multiphase reconstruction reduces prosthetic valve-related and atrial fibrillation-related artifacts at cardiac CT

AU - Suh, Young Joo

AU - Im, Dong Jin

AU - Hong, Yoo Jin

AU - Lee, Hye Jeong

AU - Hur, Jin

AU - Choi, Byoung Wook

AU - Kim, Youngjin

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N2 - OBJECTIVE. The objective of our study was to compare the image quality of cardiac CT images of mechanical valves in patients with irregular heart rates (HRs) using absolute-delay multiphase reconstruction versus relative-delay multiphase reconstruction. MATERIALS AND METHODS. A total of 26 patients with 40 mechanical valves who had atrial fibrillation during CT were included. The image quality of the CT scans was assessed for the subvalvular and valvular regions on a 4-point scale. The paired t test or Wilcoxon signed rank test was used to compare image quality scores between the relative-delay and absolute-delay reconstruction techniques. The overall image quality score was determined as the mean of the valvular and subvalvular region scores. RESULTS. For valvular regions, the image quality scores were 2.93 ± 0.73 (mean ± SD) for the relative-delay reconstruction technique and 3.55 ± 0.60 for the absolute-delay reconstruction technique (p < 0.0001). For subvalvular regions, the image quality scores were 2.8 ± 2.80 ± 0.79 and 3.35 ± 0.66 for the relative-and absolute-delay reconstructions (p < 0.0001), respectively. The nondiagnostic image quality group consisted of relative-delay reconstruction images of three valves (7.5%); the image quality scores for the absolute-delay reconstruction images of all three valves were improved, and the absolute-delay reconstruction images of the three valves were of diagnostic quality (p < 0.0001). CONCLUSION. Absolute-delay multiphase reconstruction can impGrant: rove CT image quality of mechanical valves in patients with an irregular HR compared with relative-delay reconstruction.

AB - OBJECTIVE. The objective of our study was to compare the image quality of cardiac CT images of mechanical valves in patients with irregular heart rates (HRs) using absolute-delay multiphase reconstruction versus relative-delay multiphase reconstruction. MATERIALS AND METHODS. A total of 26 patients with 40 mechanical valves who had atrial fibrillation during CT were included. The image quality of the CT scans was assessed for the subvalvular and valvular regions on a 4-point scale. The paired t test or Wilcoxon signed rank test was used to compare image quality scores between the relative-delay and absolute-delay reconstruction techniques. The overall image quality score was determined as the mean of the valvular and subvalvular region scores. RESULTS. For valvular regions, the image quality scores were 2.93 ± 0.73 (mean ± SD) for the relative-delay reconstruction technique and 3.55 ± 0.60 for the absolute-delay reconstruction technique (p < 0.0001). For subvalvular regions, the image quality scores were 2.8 ± 2.80 ± 0.79 and 3.35 ± 0.66 for the relative-and absolute-delay reconstructions (p < 0.0001), respectively. The nondiagnostic image quality group consisted of relative-delay reconstruction images of three valves (7.5%); the image quality scores for the absolute-delay reconstruction images of all three valves were improved, and the absolute-delay reconstruction images of the three valves were of diagnostic quality (p < 0.0001). CONCLUSION. Absolute-delay multiphase reconstruction can impGrant: rove CT image quality of mechanical valves in patients with an irregular HR compared with relative-delay reconstruction.

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