Article

[Improving coronary artery imaging quality in the high heart rate region and on MDCT using a pulsating cardiac phantom].

GE Yokogawa Medical Systems.
Nippon Hoshasen Gijutsu Gakkai zasshi 05/2005; 61(4):506-13. pp.506-13
Source: PubMed

ABSTRACT The multi-sector reconstruction (MSR) algorithm and cardiac half-reconstruction (CHR) algorithm are the main algorithms used in cardiac reconstruction. Analysis of effective temporal resolution (TR) confirmed that optimal rotation speed depends on different heart rates when using MSR. During visualization (3D/MPR image) and quantitative (EF: ejection fraction) evaluations, it was found that image quality and measurement accuracy are well correlated with effective temporal resolution (TR) by the different algorithms. The CHR algorithm resulted in less desirable image quality at TR 250 ms than that from MSR at high heart rates (>75 bpm) in the phantom experiment. We determined that the combination of the MSR algorithm and the optimal selection of gantry rotation speed is important for obtaining high-quality cardiac imaging in the high heart rate region.

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Keywords

3D/MPR image
 
CHR
 
CHR algorithm
 
desirable image quality
 
different algorithms
 
different heart rates
 
effective temporal resolution
 
ejection fraction
 
gantry rotation speed
 
heart rate region
 
heart rates
 
high-quality cardiac imaging
 
image quality
 
main algorithms
 
measurement accuracy
 
MSR algorithm
 
multi-sector reconstruction
 
optimal rotation speed
 
optimal selection
 
phantom experiment
 

Yun Shen