A software tool for interactive generation, representation, and systematical storage of transfer functions for 3D medical images

Authors:
M. Alper Selver;Felix Fischer;Mehmet Kuntalp;Walter Hillen
Affiliations:
Dokuz Eylül University, Electrical and Electronics Engineering Department, Kaynaklar Campus, Buca, Izmir 35160, Turkey;FH-Juelich, University of Applied Sciences, Medical Informatics Laboratory, D-52428 Juelich, Germany;Dokuz Eylül University, Electrical and Electronics Engineering Department, Kaynaklar Campus, Buca, Izmir 35160, Turkey;FH-Juelich, University of Applied Sciences, Medical Informatics Laboratory, D-52428 Juelich, Germany
Venue:
Computer Methods and Programs in Biomedicine
Year:
2007

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Abstract

As being a tool that assigns optical parameters, i.e. color, transparency, used in interactive visualization, transfer functions have very important effects on the quality of volume rendered medical images. However, finding accurate transfer functions is a very difficult, tedious, and time consuming task because of the variety of all possibilities. By addressing this problem, a software module, which can be easily plugged into any visualization program, is developed based on the specific expectations of medical experts. Its design includes both a new user interface to ease the interactive generation of the volume rendered medical images and a volumetric histogram based method for initial generation of transfer functions. In addition, a novel file system has been implemented to represent 3D medical images using transfer functions based on the DICOM standard. For evaluation of the system by various medical experts, the software is installed into a DICOM viewer. Based on the feedback obtained from the medical experts, several improvements are made, especially to increase the flexibility of the program. The final version of the implemented system shortens the transfer function design process and is applicable to various application areas.