数字减影造影测量左室容积及射血分数的研究-放射学实践.PDF

放射科实践 1999, 14(4) B231-233 2 1 = : 通过心室定量模拟实验, 比较长度-面积法和视频密度法测量心室不同收缩及显影状态室 容积和射血 分数(EF) 的准确性: 对室壁不同运动状态及室 显影不均的单双向造影像, 分别以长度-面积法和视频密度法测量室 容积和EF 并与实际值比较: 双向造影的长度-面积法EF 测量值与实际值无显著性差异( P 0.05) ; 单向造影的测量 值在局部室壁运动减弱时差异显著( P 0.01) ; 视频密度测量法在室 内造影剂混合不均时测量值有显著差异( P 0.01) :室壁运动正常的左室DSA, 单向造影的长度-面积法可替代双向造影测量心室EF;局部室壁运动异常时, 双向造影测量 的正确性较高; 视频密度测量法可用于中心静脉法DSA 测量左室EF 而不宜用于选择性左室造影 = 数字减影血管造影 长度-面积法 视频密度测量法 左室射血分数 Study on measurement of left ventricular volume and ejection fraction in digital subtraction angiography Ye Jianding, Lin Mei-l ing, Li Z iming, et al. Department of Radiology , S ang ai C est Hospital, S ang ai 200030 = Abstract Objective:T e area-lengt and videodensitometry met ods were employed to calculate left ventricular ( LV) volume and ejection fraction (EF) quantitatively in analog-experiments in DSA.T e measurement values were compared wit real values so as to c oose t e best measuring met od in order to improve t e accuracy of quantitative diagnosis in clinical use.Methods:On single-plane and biplane DSA images ( including caseswit normal ventricular wall motion, ypokinesia and insufficient mixing of contrast medium in ven- tricular cavity) t e area-lengt met od and videodensitometry met od were used to calculate t e volume and EF respectively. Results:T e result of biplane area-lengt met odwas found to be more accurate t an t ose obtainedwit ot er two met ods in abnormal wall motion and insufficient mixing of contrast medium, t e error of EF was nonsignificant ( P 0. 05) ; but in t e calculation of LV volume and EF by sin- gle-plane area-lengt met od, t e error of EF was significant (P 0.01) w en t ere was ypokinesia of local wall motion. T e error of EF obtained wit videodensitometry met od also was significant ( P 0.01) w en t er