CAJ | 학술논문

目的探讨同步匹配蒙片去骨(MMBE)技术显示脑血管的可行性并比较其与容积CT数字减影血管造影(VCTDSA)的减影图像质量.方法应用64层螺旋CT扫描血管模型:①未注射对比剂同步和非同步扫描各10次;②注射对比剂后同步和非同步扫描各5次.用MMBE减影后行3D VR、最大密度投影(MIP)图像重组评价减影图像质量;测量减影全幅图像CT值(无对比剂);前后提取两组骨蒙片相减评价图像质量(无对比剂);比较同步MMBE与VCTDSA的减影图像质量.结果采用MMBE减影同步与非同步扫描图像质量均为Ⅱ级13次、Ⅲ级2次;同步与非同步扫描减影图像CT值均数差异亦无统计学意义(P>0.05);10次同步扫描骨蒙片相减图像质量均为Ⅰ级,而非同步扫描骨蒙片相减图像质量Ⅱ级8次、Ⅲ级1次、Ⅰ级1次;同步MMBE减影图像质量Ⅱ级13次、Ⅲ级2次,15次VCTDSA减影图像质量均为Ⅰ级.结论同步MMBE技术是显示脑血管的可行方法,可提高MMBE减影后的图像质量;VCTDSA减影图像质量优于同步MMBE.
목적 탐토동보필배몽편거골(MMBE)기술현시뇌혈관적가행성병비교기여용적CT수자감영혈관조영(VCTDSA)적감영도상질량.방법 응용64층라선CT소묘혈관모형:①미주사대비제동보화비동보소묘각10차;②주사대비제후동보화비동보소묘각5차.용MMBE감영후행3D VR、최대밀도투영(MIP)도상중조평개감영도상질량;측량감영전폭도상CT치(무대비제);전후제취량조골몽편상감평개도상질량(무대비제);비교동보MMBE여VCTDSA적감영도상질량.결과 채용MMBE감영동보여비동보소묘도상질량균위Ⅱ급13차、Ⅲ급2차;동보여비동보소묘감영도상CT치균수차이역무통계학의의(P>0.05);10차동보소묘골몽편상감도상질량균위Ⅰ급,이비동보소묘골몽편상감도상질량Ⅱ급8차、Ⅲ급1차、Ⅰ급1차;동보MMBE감영도상질량Ⅱ급13차、Ⅲ급2차,15차VCTDSA감영도상질량균위Ⅰ급.결론 동보MMBE기술시현시뇌혈관적가행방법,가제고MMBE감영후적도상질량;VCTDSA감영도상질량우우동보MMBE.
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.