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What is Volumetric Medical Image

Chapter 29
Handbook of Research on Advanced Techniques in Diagnostic Imaging and Biomedical Applications
A typical 3D data set is a group of 2D slice images acquired by a CT or MRI scanner. Usually these are acquired in a regular pattern (e.g., one slice every millimeter) and usually have a regular number of image pixels in a regular pattern. This is an example of a regular volumetric grid, with each volume element, or voxel represented by a single value that is obtained by sampling the immediate area surrounding the voxel.
Published in Chapter:
Advanced ROI Coding Techniques for Medical Imaging
Charalampos Doukas (University of the Aegean, Greece) and Ilias Maglogiannis (University of Central Greece, Greece)
Copyright: © 2009 |Pages: 13
DOI: 10.4018/978-1-60566-314-2.ch029
Abstract
Medical images are often characterized by high complexity and consist of high resolution image files, introducing thus several issues regarding their handling. Current compression schemes produce high compression rates, sacrificing however the image quality and leading this way to unenviable examination. Region of Interest (ROI) coding has been introduced as an efficient technique for addressing such issues, by performing advanced image compression and preserving quality in diagnostically critical regions. This chapter discusses the basic ROI approaches and provides an overview of state of the art ROI coding techniques for medical images along with corresponding results.
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