201Tl定量门控心肌灌注体层显像与99mTc-红细胞门控心血池显像测定左心室射血分数的对比研究

目的 探讨201Tl定量门控心肌灌注体层显像与99mTc-红细胞门控心血池显像测量左心室射血分数(LVEF)的相关性.方法 72例受检者接受201Tl静息门控心肌灌注体层显像,用AUTOQUANT 4.21软件测量LVEF,并与24 h内的静息99mTc-红细胞平衡法门控心血池显像结果进行比较.结果 ①门控心肌灌注体层显像与门控心血池显像测量LVEF值的结果呈明显正相关(r=0.554,P=-0.000),两种方法无统计学差别(t=1.194,P＞0.05).②不同疾病组之间两种测量方法无统计学差异(P值均大于0.05).③门控心肌灌注体层显像及门控心血池显像测量的LVEF值分别为(64.68±10.77)%和(62.46±8.99)%,门控心肌灌注体层显像测量的LVEF值要比门控心血池显像高出3.55%.结论 201Tl门控心肌灌注体层显像与99mTc-红细胞门控心血池显像测量LVEF值的相关性好且结果准确,但门控心肌灌注体层显像的LVEF测量值要稍高于门控心血池显像.

Comparison study of left ventricular ejection fraction measured by 201Tl gated myocardial imaging and 99mTc-red blood cell gated blood-pool imaging

Objective To explore the correlation of automatic quantification of left ventricular ejection fraction (LVEF) from gated myocardial perfusion SPECT with 201Tl and rest equilibrium gated bloodpool imaging with 99mTc-red blood cell.Methods Rest gated myocardial perfusion SPECT with 201Tlwas performed on 72 cases.AUTOQUANT 4.21 software was used to measure LVEF.Rest equilibrium gated blood-pool imaging was also performed within 24 h.The values of LVEF measured by two methods were gated myocardial perfusion SPECT and rest equilibrium gated blood-pool imaging(r=0.554,P=0.000).There methods were(64.68±10.77)%and(62.46±8.99)%.The values of LVEF measured by gated myocardial perfusion SPECT was higher 3.55%than rest equilibrium gated blood-pool imaging.Conclusion There was good correlation between the LVEF measured with gated myocardial perfusion SPECT by AUTOQUANT 4.21 software and gated blood-pool imaging.The LVEF can be accurately evaluated using gated myocardial perfusion SPECT with 201Tl.The value of LVEF measured by gated myocardial perfusion SPECT was higher than rest equilibrium gated blood-pool imaging.