Petrovic O, Feigenbaum H, Armstrong W F, Ryan T, West S R, Green-Hess D, Stewart J, Friedmeyer J L, Fineberg N S
J Clin Ultrasound. 1986 Jun;14(5):367-72. doi: 10.1002/jcu.1870140507.
A problem in quantitative two-dimensional echocardiography is myocardial dropout of still frame images. This study was designed to evaluate the ability of digital averaging to overcome myocardial dropout without distorting quantitative measurements. Forty-one percent of 80 digitally averaged images were thought to be improved by five independent observers, whereas 7% showed some deterioration. Measurements obtained from processed images were statistically identical (r greater than or equal to 0.9) to those from three arithmetically averaged, unprocessed images in 60 patients. Digital averaging can improve image quality without measurement distortion and should facilitate two-dimensional echocardiographic quantitation.
定量二维超声心动图中的一个问题是静态帧图像中的心肌缺失。本研究旨在评估数字平均技术在不扭曲定量测量结果的情况下克服心肌缺失的能力。80幅数字平均图像中有41%被5名独立观察者认为有所改善，而7%显示出一些恶化。在60名患者中，从处理后的图像获得的测量结果与从三张算术平均的未处理图像获得的测量结果在统计学上是相同的（r大于或等于0.9）。数字平均技术可以在不影响测量的情况下提高图像质量，并且应有助于二维超声心动图的定量分析。
