석회화된 관상동맥 질환에서 16 Slice MDCT의 Kernel 값이 관상동맥 내경협착에 미치는 영향평가에 대한 연구

Assessment of the Effect of Kernel Factors for Coronary Artery Stenosis Caused by Calcified Plaque Using 16 Slice MDCT

Purpose The purposes of this study were to evaluate the effect to change of kernel factors using 16 slice multi-dectector computed tomography. Materials and Methods Twenty patients were evaluated for subsistence calcification of coronary artery. Twenty asymptomatic subject(8 womwn, 12 men; age range, 54~83; mean age 65 years) underwent 16 slice multi-detector computed tomography. MDCT was performed on a 16 slice multi-dectector computed tomography with a standard coronary protocol(detector collimation 12×0.75mm, table feed 6.8mm/rotation, rotation time 420 ms, tube current time 150mAs, tube voltage 120kVp). Agaston scores and maximun intensity projection were performed with a workstation. MIP image evaluation was performed by two radiologists in a consensus decision on a eight-point scale: 1=severe blooming artifact, 8=small blooming artifact. For evaluation of images window width 900 and windoq center 400 were used. Results The point of reading that the B40f kernel were very higher than other kernel the score 7.5. And blooming artifact is the lowest at the kernel of B50f. Conclusion We recommended high resolution kernel(B40f) for evaluation of coronary artery lumen with cacification.