国际生物医学工程杂志
國際生物醫學工程雜誌
국제생물의학공정잡지
INTERNATIONAL JOURNAL OF BIOMEDICAL ENGINEERING
2010年
5期
270-275,后插3
,共7页
李伟%龙晚生%兰勇%李锦蓉%罗学毛%何义改
李偉%龍晚生%蘭勇%李錦蓉%囉學毛%何義改
리위%룡만생%란용%리금용%라학모%하의개
图像质量%影响因素%64排螺旋CT%颅脑动脉成像%高场强磁共振血管成像
圖像質量%影響因素%64排螺鏇CT%顱腦動脈成像%高場彊磁共振血管成像
도상질량%영향인소%64배라선CT%로뇌동맥성상%고장강자공진혈관성상
Image quality%Influence factors%64-slice spiral CT%Brain artery imaging%High field magnetic resonance angiography
目的 探讨64排螺旋CT颅脑计算机断层血管成像(CTA)和高场强磁共振成像血管(MRA)的效果及影响图像质量的因素.方法 对1 128例脑CTA患者中的138例和1 558例脑MRA患者中的208例1周内行数字减影血管造影(DSA)检查.CTA与MRA图像分为5级,得分1～5分.颅内动脉瘤按瘤体长径分为:小型(＜5 mm),中型(5～10 mm),大型(10～25 mm),巨大型(＞25 mm);动脉狭窄按直径分:轻度(＜50%),中度(50%～74%),严重(75%～99%),闭塞(100%).结果 以DSA为标准,CTA、MRA评估小型、中型、大型、巨大型动脉瘤的灵敏度分别为:(72%、60.9%),(83.7%、78.3%),(92.6%、87.5%),(100%、100%);评估动脉狭窄轻度、中度、严重、闭塞的灵敏度分别为(50%、44.8%),(80%、78.9%),(88.9%、84.6%),(100%、100%).影响CTA的因素有成像技术、延迟时间、旋转时间/螺距、造影剂单位剂量与注射速度、血管钙化、重建技术等;影响MRA的因素有饱和带、磁化传递、TR/TE/FA、激励次数/采集矩阵、成像技术、动脉钙化等.结论 颅脑CTA检出动脉瘤和动脉狭窄的灵敏度高于MRA而低于DSA.CTA、MRA能满足临床检出动脉瘤和血管狭窄的要求.
目的 探討64排螺鏇CT顱腦計算機斷層血管成像(CTA)和高場彊磁共振成像血管(MRA)的效果及影響圖像質量的因素.方法 對1 128例腦CTA患者中的138例和1 558例腦MRA患者中的208例1週內行數字減影血管造影(DSA)檢查.CTA與MRA圖像分為5級,得分1～5分.顱內動脈瘤按瘤體長徑分為:小型(＜5 mm),中型(5～10 mm),大型(10～25 mm),巨大型(＞25 mm);動脈狹窄按直徑分:輕度(＜50%),中度(50%～74%),嚴重(75%～99%),閉塞(100%).結果 以DSA為標準,CTA、MRA評估小型、中型、大型、巨大型動脈瘤的靈敏度分彆為:(72%、60.9%),(83.7%、78.3%),(92.6%、87.5%),(100%、100%);評估動脈狹窄輕度、中度、嚴重、閉塞的靈敏度分彆為(50%、44.8%),(80%、78.9%),(88.9%、84.6%),(100%、100%).影響CTA的因素有成像技術、延遲時間、鏇轉時間/螺距、造影劑單位劑量與註射速度、血管鈣化、重建技術等;影響MRA的因素有飽和帶、磁化傳遞、TR/TE/FA、激勵次數/採集矩陣、成像技術、動脈鈣化等.結論 顱腦CTA檢齣動脈瘤和動脈狹窄的靈敏度高于MRA而低于DSA.CTA、MRA能滿足臨床檢齣動脈瘤和血管狹窄的要求.
목적 탐토64배라선CT로뇌계산궤단층혈관성상(CTA)화고장강자공진성상혈관(MRA)적효과급영향도상질량적인소.방법 대1 128례뇌CTA환자중적138례화1 558례뇌MRA환자중적208례1주내행수자감영혈관조영(DSA)검사.CTA여MRA도상분위5급,득분1～5분.로내동맥류안류체장경분위:소형(＜5 mm),중형(5～10 mm),대형(10～25 mm),거대형(＞25 mm);동맥협착안직경분:경도(＜50%),중도(50%～74%),엄중(75%～99%),폐새(100%).결과 이DSA위표준,CTA、MRA평고소형、중형、대형、거대형동맥류적령민도분별위:(72%、60.9%),(83.7%、78.3%),(92.6%、87.5%),(100%、100%);평고동맥협착경도、중도、엄중、폐새적령민도분별위(50%、44.8%),(80%、78.9%),(88.9%、84.6%),(100%、100%).영향CTA적인소유성상기술、연지시간、선전시간/라거、조영제단위제량여주사속도、혈관개화、중건기술등;영향MRA적인소유포화대、자화전체、TR/TE/FA、격려차수/채집구진、성상기술、동맥개화등.결론 로뇌CTA검출동맥류화동맥협착적령민도고우MRA이저우DSA.CTA、MRA능만족림상검출동맥류화혈관협착적요구.
Objective To study the effect of brain artery imaging with 64-slice spiral CT and high field MR and influence factors of the image quality.Methods 138 cases of 1128 patients with brain CTA and 208 cases of 1558 patients with brain MRA were examined with brain DSA within a week.The image qualities of CTA and MRA were divided into five degree,scoring 1 to 5.Intracranial aneurysms were divided into four degree according to the tumor length:small(＜5 mm),medium(5～10 mm),large(10～25 mm),giant(＞ 25 mm).Artery stenosis was divided into four degrees according to the diameters:mild (＜50%),moderate(50%～74%),serious (75%～99%) and occlusion (100%).Results Using DSA as comparison standard,the sensitivities of CTA/MRA in small,medium,large and giant aneurysms were (72%,60.9%),(83.7%,78.3%),(92.6%,87.5%),( 100%,100% ),respectively.The sensitivity of artery stenosis in mild,moderate,severe,occlusion were (50%,44.8%),(80%,78.9% ),(88.9%,84.6%),(100%,100%),respectively.The influence factors of CTA image quality include imaging technique,the delay time,rotation time/pitch,the unit dose of contrast medium and injection speed,vascular calcification,reconstruction,and so on.The influence factors of MRA image quality include unsaturated zone settings,magnetization transfer,TR/TE/FA,NEX/Matrix,imaging technology,arterial calcification,and so on.Conclusion The sensitivity of brain CTA to detect aneurysms and arterial stenosis is higher than that of MRA,but lower than DSA.CTA and MRA,however it can meet the clinical requirements of vascular stenosis and aneurysms detection.
