A comparison of two methods of analog-to-digital medical video conversion

被引：1

作者：

Berges, G ^{[1
]}

Davidson, HC ^{[1
]}

Chapman, B ^{[1
]}

Cannon, G ^{[1
]}

Christian, M ^{[1
]}

Harnsberger, D ^{[1
]}

Harnsberger, HR ^{[1
]}

机构：

[1] Univ Utah, Sch Med, Ctr Adv Med Technol, Dept Radiol, Salt Lake City, UT USA

来源：

JOURNAL OF DIGITAL IMAGING | 2000年 / 13卷 / 03期

关键词：

analog-to-digital conversion; data compression; video processing; multimedia; medical education;

D O I：

10.1007/BF03168382

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

The purpose of this study was to compare 2 methods of analog-to-digital video conversion in anticipation of improving, refining, and standardizing digital video production for medical education, diagnosis support, and telemedicine. A video workstation was devised containing 2 analog-to-digital video conversion systems: a digital video media converter with fire wire card and a video capture card. A procedure for final digital video production was created that used equivalent compression, pixel resolution, frame rate, and data rate for both systems. A subjective test was performed in which 12 archived analog videotapes, consisting of magnetic resonance angiograms, ultrasounds, neurosurgeries, and telemedicine applications, were converted digitally using the 2 methods. Randomized side by side video comparisons were analyzed and rated by subjective quality. An objective test was performed by videotaping a gray-scale test pattern off a computer monitor, digitally converting it by the 2 methods, and comparing the gray-scale values to the original pattern. There was no significant difference in overall video quality (P = .31) or gray-scale reproduction using the 2 methods of analog-to-digital conversion. When performing simple analog-to-digital video conversion, a video capture card is equal in quality and costs less than a digital video (DV) media converter or fire wire card. If a digital video camera is available for use, then a DV media converter or fire wire card is more advantageous because it enables full operation of the digital video camera. Copyright (C) 2000 by W.B. Saunders Company.

引用

页码：109 / 113

页数：5

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