Brain Computed Tomographic Angiography에서 Locator변화에 따른 조영증강에 대한 연구

A Study for Optimal Enhancement According to Change of the Locator in Brain Computed Tomographic Angiography

Purpose In contrast enhanced imaging, a contrast agent is introduced into the anatomy of a patient, typically by way of an intravenous or intra-arterial injection. Following a delay which allows the contrast agent to reach a region of interest(ROI) of the patient’s anatomy, a scan of the region is initiated. A bolus tracking scan is coordinated to coincide with the presence of the contrast agent at the ROI, as scanning either too early or too late can result in less dian optimal enhancement, and possibly require that the patient be rescanned. To achieve standard contrast enhancement appropriately throughout the location of the target vessels, this study was undertaken the locator placed in the descending aorta for the brain computed tomographic angiography(CTA). Materials and methods The study was conducted using brain CTA for patients who presented at our hospital from November 2009 to February 2010. Optimization of bolus timing was used at a place of the locator in the descending aorta via a 64-detector row CT brain angiography. Results When compared place descending aorta in the locator with internal carotid artery and random locator around avoiding the neck vessels, descending aorta in the locator more contrast enhancement. So the cases reduce probability protect missing the enhancement time and the target regions and increasing three-dimensional processing time. Conclusion This study is reduced that more insufficient arterial contrast or excessive venous enhancement, which can be placed of a locator in the descending artery. And that is good arterial contrast with little venous contamination. Our investigation provides to the optimal enhance time product by merging the three-dimensional representations of circle of willis portion and common carotid artery bifurcation more than valuable diagnostic images for helpful diagnosis and therapy using optimal enhancement according to change of locator in brain CTA.