Data compression method of left ventricular cineangiograms for their digital database system
Yasuhiro Ohtaki, Kazuo Toraichi, Takahiko Horiuchi, 文彦 長崎 · 2002
This method enables digital optical discs to store the cineangiograms with an equivalent recording density to that of HDTV (high-definition television) VTRs (video tape recorders) under the premise of preserving original image quality. The data volume of the cineangiograms is compressed by approximating the image with a smooth function and storing its coefficients. For efficient compression, the cineangiogram is decomposed into three regions in advance. Each region is then compressed by a difference operation and an adaptive approximation with smooth functions. The performance is tested on 20 cases on actual clinical cineangiograms. The specifications are verified for a spatial resolution of 1000 TV lines, a dynamic range of 60 dB, an SNR of 40 dB[p-p/rms], volume compression into 7% of the original one, and 0.19 s/frame for decoding on a 1.7-MFLOPS machine.>