MDCT를 이용한 Neck Angiography검사 시 조영제량 감소에 따른 화질 향상에 관한 연구

Evaluation of image quality as reduction of contrast volume in Neck angiography by MDCT

Purpose This study is to evaluate the effect on quality of angiographic image, when the contrast media volume is reduced in Neck angiography by MDCT. Materials and methods Tortal one hundred patients have been examined angiography by MDCT. Fifty patient(A group) of one hundred patients have been examined with 100ml contrast media, the other fifty patients (B group) have been examined with 60ml contrast media and 40ml normal saline. The speed of injection was 4-5cc per second by auto injector. Dual source CT (Definition, Siemens, Erlangen, Germany) and dual auto injector (Optivantage, TYCO) were used for this study. Patients that performed Neck angiography reconstructed 3D image and a radiologist used to 5 scales evaluated visually at the subclavian vein artifact. Results A group-50 person that 100ml contrast media by single auto injection which it uses 1point 0people (0%) and 2 points 2 people (4%) and 3 points 18 people (36%) and 4 points 21 people(42%) and 5 points with 9people(18%) seemed, B group-50 person that 60ml contrast media +Normal saline 40 ml by dual auto injection which they use 1 point 2 people(4%) and 2 points 1 people(2%), 3 points 5 people(10%) 4 points 17 people (34%) 5 points 25 people(50%) seemed. At the result, image quality improved at reduced contrast media. Conclusion The Neck angiography diagnos the carotid artery obstruction or stenosis. When examined 40% it will diminish the contrast media, it will be able to minimize the artifact due to a contrast media abundance in subclavian vein and the possibility of bringing an image quality improvement it was. The CT equipment is developed and rapidity it controls the contrast media quantity which recent existing where also the scan time is coming to be quick gradually it uses well and if it inspects, only image quality improvement it knows, until the side effect which it follows in contrast media decrease it gets and the possibility of putting out it will it thinks.