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Proceedings Paper

New compression techniques for storage and transmission of 2D and 3D medical images
Author(s): Aurel M. Vlaicu; Serban Lungu; Nicolae Crisan; Stelian Persa
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Paper Abstract

Two new techniques for the compression of 2D and 3D medical images are proposed in the paper. Both algorithms are based on DCT transforms and the aim is to ensure a nearly lossless image transmission and storage with a compression rate able to reduce significantly the amount of data. The first technique, used for the storage of 2D medical images (microscope, radiographic, x-ray images, ultrasonic images, computer tomograph sections) is based on the extraction of a `region of interest' in the original image. In fact, in most situations, only a limited region of the medical image is interesting for diagnosis. For compression, a direct DCT is applied on the original image, preserving a different number of coefficients inside and outside the region of interest (must be higher inside the region). The compression ratio obtained with this method depends on the size of the selected region and on the number of DCT coefficients preserved, ranging from 4 to 20. The second technique is based on the correlation existing between contiguous axial sections obtained from the CT. The 3D volume data is compressed using an original axial section and the difference images between successive sections. The advantage of this method consists in reducing the number of DCT coefficients necessary for a nearly lossless compression of the difference images. The compression ratio obtained ranges between 6 nd 10, without significant losses in the image quality.

Paper Details

Date Published: 17 February 1995
PDF: 8 pages
Proc. SPIE 2451, Advanced Image and Video Communications and Storage Technologies, (17 February 1995); doi: 10.1117/12.201220
Show Author Affiliations
Aurel M. Vlaicu, Technical Univ. of Cluj-Napoca (Romania)
Serban Lungu, Technical Univ. of Cluj-Napoca (Romania)
Nicolae Crisan, Technical Univ. of Cluj-Napoca (Romania)
Stelian Persa, Technical Univ. of Cluj-Napoca (Romania)


Published in SPIE Proceedings Vol. 2451:
Advanced Image and Video Communications and Storage Technologies
Naohisa Ohta; Heinz U. Lemke; Jean Claude Lehureau, Editor(s)

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