The increasing capabilities of magnetic resonance (MR) imaging and multisection spiral computed tomography (CT) to acquire volumetric data with near-isotropic voxels make three-dimensional (3D) postprocessing a necessity, especially in studies of complex structures like intracranial vessels. Since most modern CT and MR imagers provide limited postprocessing capabilities, 3D visualization with interactive direct volume rendering requires expensive graphics workstations that are not available at many institutions. An approach has been developed that combines fast visualization on a low-cost PC system with high-quality visualization on a high-end graphics workstation that is directly accessed and remotely controlled from the PC environment via the Internet by using a Java client. For comparison of quality, both techniques were applied to several neuroradiologic studies: visualization of structures related to the inner ear, intracranial aneurysms, and the brainstem and surrounding neurovascular structures. The results of pure PC-based visualization were comparable with those of many commercially available volume-rendering systems. In addition, the high-end graphics workstation with 3D texture-mapping capabilities provides visualization results of the highest quality. Combining local and remote 3D visualization allows even small radiologic institutions to achieve low-cost but high-quality 3D visualization of volumetric data.

Brain Diseases↗

PubMedDate not supplied

Simultaneous measurements of DNA synthesis and DNA methylation in higher organisms.

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Animals↗

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[Research on results and psychoanalytic therapy. Experiences in the planning and carrying out of a follow up project].

The present project, now entering the initial stages after a 3-year preparation period, covers all patients admitted to the Psychosomatische Universitätsklinik Heidelberg a the beginning of 1978 or later. The project is a prospective one; therapeutic goals are formulated from a psychoanalytic perspective at the commencement of treatment, establishing criteria by which later treatment results can be evaluated as successful or unsuccessful. Furthermore, various criteria have been elaborated to observe changes in the patients during the waiting-period, in treatment and two years after treatment termination. Determining which patients and patients-groups have been successfully treated and which less so provides a basis for the study of the influence of individual factors in the therapeutic process: the various psychoanalytic techniques used, the patient variables and the therapist variables. The project is designed to affect treatment in progress as little as possible, while at the same time using empirical methods to elucidate treatment results and the factors significantly involved in producing such results. The planning aspect and the difficulties encountered in operationalising such a project centred around "Work in progress" are also dealt with.

Follow-Up Studies↗