Estimation of Diastolic Filling Pressure with Cardiac CT in Comparison with Echocardiography Using Tissue Doppler Imaging: Determination of Optimal CT Reconstruction Parameters
- Abstract
- Objective
To determine the optimal CT image reconstruction parameters for the measurement of early transmitral peak velocity (E), early peak mitral septal tissue velocity (E′), and E / E′.
Materials and Methods
Forty-six patients underwent simultaneous cardiac CT and echocardiography on the same day. Four CT datasets were reconstructed with a slice thickness/interval of 0.9/0.9 mm or 3/3 mm at 10 (10% RR-interval) or 20 (5% RR-interval) RR-intervals. The E was calculated by dividing the peak transmitral flow (mL/s) by the corresponding mitral valve area (cm2). E′ was calculated from the changes in the left ventricular length per cardiac phase. E / E′ was then estimated and compared with that from echocardiography.
Results
For assessment of E / E′, CT and echocardiography were more strongly correlated (p < 0.05) with a slice thickness of 0.9 mm and 5% RR-interval (r = 0.77) than with 3 mm or 10% RR-interval. The diagnostic accuracy of predicting elevated filling pressure (E / E′ ≥ 13, n = 14) was better with a slice thickness of 0.9 mm and 5% RR-interval (87.0%) than with 0.9 mm and 10% RR-interval (71.7%) (p = 0.123) and significantly higher than that with a slice thickness of 3 mm with 5% (67.4%) and 10% RR-interval (63.0%), (p < 0.05), respectively.
Conclusion
Data reconstruction with a slice thickness of 0.9 mm at 5% RR-interval is superior to that with a slice thickness of 3 mm or 10% RR-interval in terms of the correlation of E / E′ between CT and echocardiography. Thin slices and frequent sampling also allow for more accurate prediction of elevated filling pressure.
- All Author(s)
- J. S. Hwang
; H. Lee
; B. Lee
; S. J. Lee
; S. S. Jou
; H. K. Lim
; J. Suh
- Issued Date
- 2017
- Type
- Article
- Keyword
- Cardiac CT; Echocardiography; Tissue Doppler; Ventricular function; Diastolic function; Left ventricle
- Publisher
- 대한영상의학회
The Korean Society of Radiology
- ISSN
- 1229-6929
; 2005-8330
- Citation Title
- Korean journal of radiology
- Citation Volume
- 18
- Citation Number
- 4
- Citation Start Page
- 632
- Citation End Page
- 642
- Language(ISO)
- eng
- DOI
- 10.3348/kjr.2017.18.4.632
- URI
- http://schca-ir.schmc.ac.kr/handle/2022.oak/2685
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