Factors affecting computed tomography image quality for assessment of mechanical aortic valves

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Evaluating mechanical valves with computed tomography (CT) can be problematic because artifacts from the metallic components of valves can hamper image quality. The purpose of this study was to determine factors affecting the image quality of cardiac CT to improve assessment of mechanical aortic valves. A total of 144 patients who underwent aortic valve replacement with mechanical valves (ten different types) and who underwent cardiac CT were included. Using a four-point grading system, the image quality of the CT scans was assessed for visibility of the valve leaflets and the subvalvular regions. Data regarding the type of mechanical valve, tube voltage, average heart rate (HR), and HR variability during CT scanning were compared between the non-diagnostic (overall image quality score ≤2) and diagnostic (overall image quality score >2) image quality groups. Logistic regression analyses were performed to identify predictors of non-diagnostic image quality. The percentage of valve types that incorporated a cobalt-chrome component (two types in total) and HR variability were significantly higher in the non-diagnostic image group than in the diagnostic group (P < 0.001 and P = 0.013, respectively). The average HR and tube voltage were not significantly different between the two groups (P > 0.05). Valve type was the only independent predictor of non-diagnostic quality. The CT image quality for patients with mechanical aortic valves differed significantly depending on the type of mechanical valve used and on the degree of HR variability.

Original languageEnglish
Pages (from-to)63-71
Number of pages9
JournalInternational Journal of Cardiovascular Imaging
Volume32
DOIs
Publication statusPublished - 2016 Jun 1

Fingerprint

Aortic Valve
Tomography
Heart Rate
Cobalt
Artifacts
Logistic Models
Regression Analysis

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Cite this

Suh, Young Joo ; Kim, Youngjin ; Hong, Yoo Jin ; Lee, Hye Jeong ; Hur, Jin ; Hong, Sae Rom ; Im, Dong Jin ; Kim, Yun Jung ; Choi, Byoung Wook. / Factors affecting computed tomography image quality for assessment of mechanical aortic valves. In: International Journal of Cardiovascular Imaging. 2016 ; Vol. 32. pp. 63-71.
@article{a26ba4d81a65475a8e82f6f74c3034da,
title = "Factors affecting computed tomography image quality for assessment of mechanical aortic valves",
abstract = "Evaluating mechanical valves with computed tomography (CT) can be problematic because artifacts from the metallic components of valves can hamper image quality. The purpose of this study was to determine factors affecting the image quality of cardiac CT to improve assessment of mechanical aortic valves. A total of 144 patients who underwent aortic valve replacement with mechanical valves (ten different types) and who underwent cardiac CT were included. Using a four-point grading system, the image quality of the CT scans was assessed for visibility of the valve leaflets and the subvalvular regions. Data regarding the type of mechanical valve, tube voltage, average heart rate (HR), and HR variability during CT scanning were compared between the non-diagnostic (overall image quality score ≤2) and diagnostic (overall image quality score >2) image quality groups. Logistic regression analyses were performed to identify predictors of non-diagnostic image quality. The percentage of valve types that incorporated a cobalt-chrome component (two types in total) and HR variability were significantly higher in the non-diagnostic image group than in the diagnostic group (P < 0.001 and P = 0.013, respectively). The average HR and tube voltage were not significantly different between the two groups (P > 0.05). Valve type was the only independent predictor of non-diagnostic quality. The CT image quality for patients with mechanical aortic valves differed significantly depending on the type of mechanical valve used and on the degree of HR variability.",
author = "Suh, {Young Joo} and Youngjin Kim and Hong, {Yoo Jin} and Lee, {Hye Jeong} and Jin Hur and Hong, {Sae Rom} and Im, {Dong Jin} and Kim, {Yun Jung} and Choi, {Byoung Wook}",
year = "2016",
month = "6",
day = "1",
doi = "10.1007/s10554-015-0817-5",
language = "English",
volume = "32",
pages = "63--71",
journal = "International Journal of Cardiovascular Imaging",
issn = "1569-5794",
publisher = "Springer Netherlands",

}

Factors affecting computed tomography image quality for assessment of mechanical aortic valves. / Suh, Young Joo; Kim, Youngjin; Hong, Yoo Jin; Lee, Hye Jeong; Hur, Jin; Hong, Sae Rom; Im, Dong Jin; Kim, Yun Jung; Choi, Byoung Wook.

In: International Journal of Cardiovascular Imaging, Vol. 32, 01.06.2016, p. 63-71.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Factors affecting computed tomography image quality for assessment of mechanical aortic valves

AU - Suh, Young Joo

AU - Kim, Youngjin

AU - Hong, Yoo Jin

AU - Lee, Hye Jeong

AU - Hur, Jin

AU - Hong, Sae Rom

AU - Im, Dong Jin

AU - Kim, Yun Jung

AU - Choi, Byoung Wook

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Evaluating mechanical valves with computed tomography (CT) can be problematic because artifacts from the metallic components of valves can hamper image quality. The purpose of this study was to determine factors affecting the image quality of cardiac CT to improve assessment of mechanical aortic valves. A total of 144 patients who underwent aortic valve replacement with mechanical valves (ten different types) and who underwent cardiac CT were included. Using a four-point grading system, the image quality of the CT scans was assessed for visibility of the valve leaflets and the subvalvular regions. Data regarding the type of mechanical valve, tube voltage, average heart rate (HR), and HR variability during CT scanning were compared between the non-diagnostic (overall image quality score ≤2) and diagnostic (overall image quality score >2) image quality groups. Logistic regression analyses were performed to identify predictors of non-diagnostic image quality. The percentage of valve types that incorporated a cobalt-chrome component (two types in total) and HR variability were significantly higher in the non-diagnostic image group than in the diagnostic group (P < 0.001 and P = 0.013, respectively). The average HR and tube voltage were not significantly different between the two groups (P > 0.05). Valve type was the only independent predictor of non-diagnostic quality. The CT image quality for patients with mechanical aortic valves differed significantly depending on the type of mechanical valve used and on the degree of HR variability.

AB - Evaluating mechanical valves with computed tomography (CT) can be problematic because artifacts from the metallic components of valves can hamper image quality. The purpose of this study was to determine factors affecting the image quality of cardiac CT to improve assessment of mechanical aortic valves. A total of 144 patients who underwent aortic valve replacement with mechanical valves (ten different types) and who underwent cardiac CT were included. Using a four-point grading system, the image quality of the CT scans was assessed for visibility of the valve leaflets and the subvalvular regions. Data regarding the type of mechanical valve, tube voltage, average heart rate (HR), and HR variability during CT scanning were compared between the non-diagnostic (overall image quality score ≤2) and diagnostic (overall image quality score >2) image quality groups. Logistic regression analyses were performed to identify predictors of non-diagnostic image quality. The percentage of valve types that incorporated a cobalt-chrome component (two types in total) and HR variability were significantly higher in the non-diagnostic image group than in the diagnostic group (P < 0.001 and P = 0.013, respectively). The average HR and tube voltage were not significantly different between the two groups (P > 0.05). Valve type was the only independent predictor of non-diagnostic quality. The CT image quality for patients with mechanical aortic valves differed significantly depending on the type of mechanical valve used and on the degree of HR variability.

UR - http://www.scopus.com/inward/record.url?scp=84949493118&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84949493118&partnerID=8YFLogxK

U2 - 10.1007/s10554-015-0817-5

DO - 10.1007/s10554-015-0817-5

M3 - Article

C2 - 26626457

AN - SCOPUS:84949493118

VL - 32

SP - 63

EP - 71

JO - International Journal of Cardiovascular Imaging

JF - International Journal of Cardiovascular Imaging

SN - 1569-5794

ER -