A clinical distortion index for compressed echocardiogram evaluation: recommendations for Xvid codec
Alesanco, A; Hernández, C; Portolés, A; Ramos, L; Aured, C; García, M; Serrano, P; García, J; Alesanco, A; Communication Technologies Group, Aragon Institute of Engineering Research, Zaragoza, Spain; Hernández, C; Communication Technologies Group, Aragon Institute of Engineering Research, Zaragoza, Spain; Portolés, A; Miguel Servet Hospital, Zaragoza, Spain; Ramos, L; Santa Marina Hospital, Bilbao, Spain; Aured, C; Miguel Servet Hospital, Zaragoza, Spain; García, M; Miguel Servet Hospital, Zaragoza, Spain; Serrano, P; Lozano Blesa Clinic Hospital, Zaragoza, Spain; García, J; Communication Technologies Group, Aragon Institute of Engineering Research, Zaragoza, Spain
Журнал:
Physiological Measurement
Дата:
2009-05-01
Аннотация:
This paper introduces a new clinical distortion index able to measure the decrease in diagnostic content in compressed echocardiograms. It is calculated using cardiologists' answers to a clinical testbed composed of two types of tests: one blind and the other semi-blind. This index may be used to compare clinical performance among video codecs from a clinical perspective. It can also be used to classify compression rates into useful and useless ranges, thus providing recommendations for echocardiogram compression. A study carried out in order to illustrate its use with Xvid video codec is also presented. The results obtained showed that, for 2D and M modes, the transmission rate should be at least 768 kbit s<sup>−1</sup> and for color Doppler mode and pulsed/continuous Doppler, 256 kbit s<sup>−1</sup>.
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