Experimental study of CT subtraction angiography with synchronous matched mask bone elimination
- VernacularTitle:同步匹配蒙片去骨技术CT减影血管造影的实验研究
- Author:
Lijuan ZHANG
;
Fajin LV
;
Hui XIE
;
Xiaoxian JIANG
- Publication Type:Journal Article
- Keywords:
Matched mask bone elimination;
Tomography,X-ray computed;
CT Angiography;
Angiography,digital subtraction
- From:Chinese Journal of Medical Imaging Technology
2010;26(2):201-204
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the feasibility of CT subtraction angiography of the cerebral vessels with synchronous matched mask bone elimination (MMBE) technique, and to compare the imaging quality of MMBE with that of volume computed tomographic digital subtraction angiography (VCTDSA). Methods Vascular Vascular model was scanned with 64-slice spiral CT. Synchronous and asynchronous scans were independently performed for 10 times without contrast medium injection. ②Then with contrast medium injection, the same scans mentioned above were repeatedly performed each for 5 times. The imaging quality of MMBE was analyzed, which were reformatted and displayed with 3D volume rendering (VR) and maximum intensity projection (MIP). CT value of the overall view was measured on subtracted images (without contrast medium). Two sets of bone masks were extracted for subtraction and the imaging quality was evaluated (without contrast medium). Also the imaging quality of VCTDSA was compared with that of synchronous MMBE. Results With synchronous and asynchronous scan,imaging quality of MMBE was rated grade Ⅱ in 13 and grade Ⅲ in 2 times. There was no significant difference in the average CT value of subtracted images between the two methods(P>0.05). With synchronous scan, imaging quality of subtracted bone mask was rated gradeⅠ in 10 times. While with asynchronous scan, 1 time was grade Ⅰ, 8 were grade Ⅱ and 1 time was grade Ⅲ. The imaging quality of synchronous MMBE was rated grade Ⅱ in 13 times, grade Ⅲ in 2 times. For VCTDSA, the imaging quality was rated grade Ⅰ in 15 times. Conclusion Synchronous MMBE is a feasible imaging method for evaluation of cerebral vessels. The subtracted image quality is significantly improved with this technique. Imaging quality of VCTDSA is still superior to that of synchronous MMBE.
