Extraction of Any Angle Virtual Slice on 3D CT Image

The images from most medical imaging equipments such as CT, MRI must be along some fixed direction, but it can´t satisfy the clinical inspection from arbitrary directions and angles. In view of this problem, the method of any angle extraction of virtual slice on 3D CT image is proposed in this paper. VC++6.0 with VTK are adopted to reconstruct the 3D images using the 2D CT image sequence in DICOM format. The normal vector and interior point are calculated to form the virtual clipping plane, which in turn is used to incise the 3D object. And the information of virtual slice is obtained, in the mean while the virtual slice images are displayed on the screen. By simple interactive operations like using mouse, the image scaling, translation and rotation can be realized in real time. Therefore, the method presented in this paper is an effective complement to present medical imaging equipments.