scholarly journals Minimum Average-Cost Path for Real Time 3D Coronary Artery Segmentation of CT Images

2011 ◽  
pp. 436-444 ◽  
Author(s):  
Ning Zhu ◽  
Albert C. S. Chung
Keyword(s):  
Coronary Artery ◽  
Real Time ◽  
Average Cost ◽  
Ct Images ◽  
Coronary Artery Segmentation

Effect of CT digital image compression on detection of coronary artery calcification

2000 ◽  
Vol 41 (2) ◽  
pp. 116-121 ◽  
Author(s):  
L.-M. Zheng ◽  
S. Sone ◽  
Y. Itani ◽  
Q. Wang ◽  
K. Hanamura ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Coronary Artery Calcification ◽  
Image Data ◽  
Spiral Ct ◽  
Diagnostic Value ◽  
Ct Images ◽  
Detection Accuracy ◽  
Characteristic Analysis ◽  
High Attenuation ◽  
Significant Difference

Purpose: To test the effect of digital compression of CT images on the detection of small linear or spotted high attenuation lesions such as coronary artery calcification (CAC). Material and Methods: Fifty cases with and 50 without CAC were randomly selected from a population that had undergone spiral CT of the thorax for screening lung cancer. CT image data were compressed using JPEG (Joint Photographic Experts Group) or wavelet algorithms at ratios of 10:1, 20:1 or 40:1. Five radiologists reviewed the uncompressed and compressed images on a cathode-ray-tube. Observer performance was evaluated with receiver operating characteristic analysis. Results: CT images compressed at a ratio as high as 20:1 were acceptable for primary diagnosis of CAC. There was no significant difference in the detection accuracy for CAC between JPEG and wavelet algorithms at the compression ratios up to 20:1. CT images were more vulnerable to image blurring on the wavelet compression at relatively lower ratios, and "blocking" artifacts occurred on the JPEG compression at relatively higher ratios. Conclusion: JPEG and wavelet algorithms allow compression of CT images without compromising their diagnostic value at ratios up to 20:1 in detecting small linear or spotted high attenuation lesions such as CAC, and there was no difference between the two algorithms in diagnostic accuracy.

scholarly journals Real-time graft flow assessment using epigraftic ultrasonography during coronary artery bypass grafting

2014 ◽  
Vol 46 (4) ◽  
pp. 706-712 ◽  
Author(s):  
S. Takahashi ◽  
M. Kuroda ◽  
K. Orihashi ◽  
T. Takasaki ◽  
K. Imai ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Coronary Artery Bypass Grafting ◽  
Real Time ◽  
Coronary Artery Bypass ◽  
Artery Bypass ◽  
Bypass Grafting ◽  
Artery Bypass Grafting ◽  
Graft Flow
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