Computer Imaging and Simulation
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Links		 When applicable, SDNDS uses CASS, a state-of-the-art computer imaging system for assisting in stereotactic brain surgery and radiosurgery.

Introduction to the CASS System:

cass.jpg (26087 bytes)The CASS (Computer Assisted Stereotactic Surgery) System is a complex integration of various hardware components in a software environment. The system provides the surgeon with a means for acquiring digital images from virtually any scanner (CT, MR, DSA, Isotope, etc.). These images are stored in the system in a common format independent of the original scanning device. The data from the images can be used to plan and perform both functional and morphological stereotactic surgical procedures in a cost effective manner. The CASS System is a user-friendly, icon driven system. CASS is designed so that the surgeon can easily interface with the system during a particular procedure.

bmap.jpg (48871 bytes)
A sagittal MRI at 13-mm lateral to the mid-IIIrd ventricle with overlays of upper and lower brain stem maps. Touch-evoked responses to the face area are plotted in the region of ventralis caudalis. The depth electrode's position to a target in the basal ventralis intermedius/dorsal subthalamic area is simulated. Note automatic coordinate determination of entry point and target point for the electrode's trajectory. Maps are from Schaltenbrand & Bailey, and Schaltenbrand & Wahren.

Major Features:

The software environment of the CASS System is structured on a multi-modular, multi-divisional menu system. The extensive software library consists of more than a million lines of code, and continues to be expanded. The various features of the system, which can also be combined in use, are separated in major groupings. There is a separate menu system for image acquisition, image manipulation, probe positioning, image building, map Positioning, whole brain mapping, radiosurgery, brachytherapy and various 3-D imaging techniques.

CASS presents the neurosurgeon with the composite conceptualization of many of the complex aspects of the stereotactic technique. It is, therefore, of value to experienced stereotactic surgeons, as well as those surgeons with limited knowledge of stereotaxy. In regard to the latter, CASS provides a means to quickly develop good stereotactic skills.