CT data storage reduction by means of compressing projection data instead of images: Feasibility study

The authors developed and evaluated a technique of compressing raw projecti on data at computed tomography (CT). Raw projection data acquired at CT wer e compressed and decompressed and then used for image reconstruction. For c omparison, original images were compressed by comparable ratios. Projection data files were more compressible than image files. Projection data compre ssion is a promising, efficient method to reduce data file size and thus to facilitate retrospective image reconstruction.