The development of a new generation of non-linear computer scanner (
biophilia nls) which make use of multidimensional virtual imaging of the body area of interest, has facilitated substantially improved efficiency of the NLS-method and even expanded its fields of application (despite the MRT competition). The originally volumetric pattern of scanning is a distinctive feature of the multidimensional NLS imaging. The data thus acquired are an integral array, which facilitates reconstructing multidimensional virtual images of anatomical structures. In this connection the virtual NLS is widely used especially for angiographic investigations with a three-dimensional reconstruction of vascular formations.
Another promising field of application of the three-dimensional image reconstruction, based on the data acquired by means of multidimensional NLS, is the study of hollow organs with a “virtual NLS-scopy” involved. This kind of a system was developed for high-rate multidimensional Z-series non-linear scanners, and was called biophilia nls. The high resolution maintained during spiral scanning and the use of LAPP system (a system of parallel processors with a powerful computational capability and speed of operation) enables the implementation of the principal of “virtual NLS-scopy” on a Voxel Z multimodal DICOM-compatible work station, which is the basic system for imaging and subsequent data processing with Medintech scanners.
NLS images are made ready for visual analysis by means of the 4D Tissue, an original company-developed method, that enables not only virtual multidimensional images of anatomical structures but also selection of a particular biological tissue of interest to give it an extra dimension, and additionally visualize bones, soft tissues and vessels.
A specific feature of representing virtual data by the biophilia nls is its simultaneous visualization of surfaces of cavatus and extramural formations located outside the lumen of the cavity under examination (e.g. lymph nodes, vessels). The acquired images form a natural sequence of virtual NLS shots, while a special navigation program automatically determines the path of the “virtual scanner” by center of the cavity under examination. The path of the motion can be chosen by operator using some other settings, which allow detailed NLS pictures by changing the view fields. A raised representation of the cavity surface is also achievable by shaping particular artificially shaded areas. The presulting sequences of NLS shots can be easily converted in to a standard VHS video format by means of the epi-Client program and can be used in standard video systems, in particular for teleradiology.
The biophilia nls can be used for case detection of obstructive processes in the upper respiratory passages, bulky esophageal, gastric or colonic formations, atherosclerotic lesions of large vessels, and disorders affecting paranasal sinuses, urinary bladder or spinal canal. The data gathered by “virtual NLS-scopy” facilitates selection of the optimum spot for biopsy and can define the extent of surgical intervention in good time.
This technique can be used both stand alone and as a useful linking element between tomographic, endoscopic and NLS investigations.
