Guided Navigation of Cone Beam CT Volumetric Data Set
Objectives:
- Enumerate the different techniques available for visualization of volumetric dataset in two and three dimensions.
- Discuss the different options available when utilizing the Multi-planar reformatted (MPR) two dimensional visualization technique.
- Enumerate and discuss the different three-dimensional visualization techniques available for a volumetric dataset (Shaded Surface Display, Maximum Intensity Projection, Ray Sum and Volume Rendering).
- Describe the difference in radiographical appearance of osseous structures of the maxillofacial region in each one of these visualization techniques.
- Discuss the available rendering parameters that influence the visual quality of the rendered image.
Significance:
An understanding of the basic concepts of the two-dimensional and three-dimensional image display methods as well as the various parameters which influence the visual quality such as window/level, opacity and brightness is crucial for the accurate evaluation of the resulting images since the rendering outcomes will largely be influenced by the rendering technique chosen and rendering parameters employed.
Navigation:
This lesson is comprised of four separate modules which can be accessed from the bar on the top or from the links below on this page. Each module is composed of small sections accompanied with an animation to illustrate the principle discussed which can be accessed by clicking on the thumbnail image associated with that section.
- Two-dimensional visualization (MPR): illustrates primarily the basics and various options available when navigating a volumetric dataset using MPR or Multi-Planar Reformatting technique.
- Three-dimensional projection techniques: Discusses the basic concepts of projection techniques routinely employed for visualization which includes Maximum Intensity Projection, minimum intensity projection and Ray Sum). Volume rendering was put in a separate module due to its importance.
- Volume Rendering: Provides a description for the principle of action of volume rendering projection technique and illustrates the different parameters that you can influence to change the appearance of the final image.
- Shaded Surface Display: Provides a description for surface rendering and contrast it to volume rendering.