Coronary CT Angiography에서 Cardio ImageXact

Research about reconstruction method that use Cardio ImageXact software in Coronary CT Angiography

Purpose This research is that evaluate quality of reconstruction by Heart rate change in coronary arteries building CT examination about coronary artery disease patient who is being on the increase gradually and improve quality of reconstruction by searching for Cardiac reconstruction phase of most suitable in Heart rate that do using Cardio ImageXact that is TOSHIBA company’ s software. Materials and Methods From May, 2006 to July, 2007, Coronary CT Angiography did to 43 outpatients who examine and patient who undergo Coronary Artery Bypass Graft(CABG) surgical operation excepted. Patient does NPO during before examination and vital(BP, Heart rate) check and do 1/2T and carry on the head Metoprolol in case Heart rate more than 65, and in case is more than 75, effect conducted examination after 1 hour that is time that become maximum efficiency after did to take 1T(100mg). Reconstructed data using Cardio ImageXact that is TOSHIBA raw data reconstruction software by Auto(Best)phase, % method, ms(milli-second) method cardiac reconstruction raw data. Analysis method use Cardio ImageXact software acquires data as much as 0~99% to 1% space and 10ms space and R-R interval space to 10ms space in section of 2 level(aortic valve, mitral valve level)in raw data after examination and quality selects the best cardiac phase and acquire volume data in 3 method. Corona1y artery’ s quality in 3 cardiac recon mode analyzed comparison. Results Compared point through vessel analysis of target patient total 43 people on above 3 mode to use TOSHIBA company’ s cardiac phase recon software. 1. When Heart rate is 50~59 Average point becomes difference in segment No.2 and No.3, No.6, No.7 in 3 recon mode and difference did not become in other segment. 2. When Heart rate is 60~69 Could know that could acquire good image seeing that ms method acquires near point in 1 point in segment excepting segment No.10. 3. When Heart rate is 70~79 It is seldom difference of m.5 mode with % mode in each segment different 3 recon mode, showed near differentia in 1 point more with Auto(Best)phase mode, and % mode and ms mode could know that difference of average point is not great quality difference of image after recon in 0.1 point interior and exterior. 4. When Heart rate is over 80 Each segment different 3 recon mode could know in segment excepting segment No.9 that ms mode could get better image showing near point 1 point than Auto(Best) mode with % mode. Each segment different acquired point could make image that ms mode is better receiving near point in head of a family 1 point in Auto(Best) mode and % mode, ms mode to be 3 recon mode in each heart rate different each segment and % mode was some difference than ms mode, but did not show large difference. However, Auto(Best)recon mode to acquire good image missing near point in 1 point than above 2 mode difficulty know can. Also, Heart rate 3 recon mode did not show difference greatly in 50~59 but Heart rate is higher more than 60~69, 70~79, 80 difference of point that acquire could appear greatly and know qualitative difference of image. Conclusion By Auto(Best) and % mode or ms mode strongly in Heart rate that do stable very cardiac phase image that may not do reconstruction get. But, 75% and 45% cardiac phase are thought that this research is value more to supplement this to could not have gotten good image, and could not have good image in Auto(Best)phase usually in heart rate’ s case that do unstable. Reduce patient’ s re-procedure having gotten good image through this research, and expect to give large help diagnostic and treatment of heart vessel disease by supplying correct diagnostic information.