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首页> 外文会议>MEDINFO >Clinical Validation of Different Echocardiographic Motion Pictures Expert Group-4 Algorythms and Compression Levels for Telemedicine
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Clinical Validation of Different Echocardiographic Motion Pictures Expert Group-4 Algorythms and Compression Levels for Telemedicine

机译：不同超声心动图的临床验证专家组-4次射出的临床 - 远程医疗

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Tele-echocardiography is not widely used because of lengthy transmission times when using standard Motion Pictures Expert Groups (MPEG)-2 lossy compression algorythms, unless expensive high bandwidth lines are used. We sought to validate the newer MPEG-4 algorythms to allow further reduction in echocardiographic motion video file size. Four cardiologists expert in echocardiography read blindy 165 randomized uncompressed and compressed 2D and color Doppler normal and pathologic motion images. One Digital Video and 3 MPEG-4 compression algorythms were tested, the latter at 3 increasing compression levels (0%, 35% and 60%). Mean diagnostic and image quality scores were computed for each file and compared across the 3 compression levels using uncompressed files as controls. File dimensions decreased from a range of uncompressed 12-83 MB to MPEG-4 0.03-2.3 MB. All algorythms showed mean scores that were not significantly different from uncompressed source, exept the MPEG-4 DivXalgorythm at the highest selected compression (60%, p = .002). These data support the use of MPEG-4 compression to reduce echocardiographic motion image size for transmission purposes, allowing cost reduction through use of low bandwidth lines.
机译：由于使用标准运动图像专家组（MPEG）-2损耗压缩算法，除非使用昂贵的高带宽线，否则远程超声心动图不会被广泛使用。我们试图验证较新的MPEG-4 algorythms，以便进一步减少超声心动图运动视频文件大小。超声心动图中的四位心脏病学家专家阅读盲目165随机的未压缩和压缩的2D和彩色多普勒正常和病理学运动图像。测试一个数字视频和3个MPEG-4压缩藻类，后者在3个增加压缩水平（0％，35％和60％）。为每个文件计算平均诊断和图像质量分数，并使用未压缩的文件作为控件进行比较3个压缩级别。文件尺寸从未压缩12-83 MB的范围减少到MPEG-4 0.03-2.3 MB。所有algorythms显示出与未压缩源没有显着不同的平均分数，将MPEG-4 DivXalgorythm处于最高选择的压缩（60％，P = .002）。这些数据支持使用MPEG-4压缩来降低超声心动图运动图像尺寸以进行传输目的，从而通过使用低带宽线来降低成本。

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