Data compression of X-ray cardio-angiographic image series
- Cite this article as:
- Breeuwer, M., Heusdens, R., Gunnewiek, R.K. et al. Int J Cardiac Imag (1995) 11: 179. doi:10.1007/BF01143138
- 27 Downloads
Medical x-ray images are increasingly stored and transmitted in a digital format. To reduce the required storage space and transmission bandwidth, data compression can be applied. In this paper we describe a new method for data compression of cardio-angiographie x-ray image series. The method is based on so-called overlappedtransform coding. A comparison with the well-known block-based transform-coding methods JPEG and MPEG is presented. We found that overlapped-transform coding does not introduce any blocking artefacts, in contrast to block-based transform coding, which introduces clearly visible blocking artefacts at compression ratios above 8. Clinical evaluations of the new method have pointed out that the image quality obtained at a compression ratio of 12 is adequate for diagnostic applications.