Effect of Flow Rate and Delayed Time on Intracranial Vascular SCTA Imaging
- VernacularTitle:流速与延迟时间对脑血管SCTA成像的影响
- Author:
Haizhou HU
;
Jun LIU
;
Enhua XIAO
- Publication Type:Journal Article
- Keywords:
Intracranial,vascular;
Angiography,Tomography;
X-ray computed
- From:
Journal of Chinese Physician
2001;0(08):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of contrast material flow rate and delayed time on intracranial vascular spiral computed tomographic angiography(SCTA) imaging.Methods 30 patients were selected randomly who planed to do brain contrast enhanced CT examination.In all 30 patients a plane dynamic test scanning at suprasellar cistern level was preformed with 20ml contrast material at a flow rate of 2ml/s,3ml/s and 4ml/s respectively.A time-densty cure was originated from data collected with the software of Time-Lapse.Results The summit time of most intense enhancement of arteriovena was significantly shortened when the flow rate was increased from 2ml/s to 3ml/s or 4ml/s,and the summit time was shortened without satistically difference when the flow rate was increased from 3ml/s to 4ml/s.Conclusions The circulation time test with a little volume contrast material can become a routine procedure of SCTA examination to determine the best delayed time.The suitable flow rate of intracranial vascular SCTA is 3ml/s.
