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Specifications

MNPS

Features

MNPS results from a 22-year-development of stereotactic procedure planning techniques based on personal computers and neuroimages [1]. It began in 1990 with the name NSPS, and from 1994 to 2003 was distributed with the name of MSPS.

MNPS has versions for the following stereotactic apparatus: FiMe, Bramsys, Macom, Micromar, Leksell, CRW, ZD and Riechert-Mundinger.

All techniques are tridimensional (3D) and based on the parametrization of each tomographic, magnetic resonance and stereotactic angiography section plane.

In order to ease functional surgery procedure planning, two stereotactic atlases (Schaltenbrand-Wahren and Talairach) were digitalized to vectorial shape and various resources incorporated to achieve the maps overlay over reformatted stereo-tomographies slices. Many parameters guarantee control over the atlas space orientation in relation to the patient's brain, being the anterior and the posterior commissure essential to that.

In order to include magnetic resonance to the plan, lowering the impact of its geometric distortion, a multimode image fusion technique was created. This method considers stereo-tomography space as a rigid volume and allows a slight plasticity in resonance volume (with control over the módulo de rigidez). The algorythm is of 3D domain, semi-automatic, not being critical in case of superposition of partial volumes, and is stable when applied in images with artifacts and retrospective studies.

There are no principle limitations in mutual orientation of tomography and resonance cuts to be fused.[2] 

The incorporation of such methods raises the safety of procedures, lowers their invasion and reduces surgical time.
Another MNPS resource is the module for Radiosurgery planning.

The MNPS System can be configured for different models of Stereotaxis and Radiosurgery equipments

[1] - "A Stereotactic Surgical Planning System for the IBM 386/486 PC Family", A. Alaminos, I. Ortega, H. Molina, P. Valladares. Stereotac Funct Neurosurg 1994; 63.

[2] – "Desenvolvimento de uma técnica para fusão de imagens como complemento ao planejamento cirúrgico em condições estereotáxicas", Armando Lázaro Alaminos Bouza, Tesis presentada a la Universidade Federal de São Paulo – Escola Paulista de Medicina – para la obtención del título de Master en Neurociencias. 1999.

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 Evolution of the System

Version History
Version 10.31
• Compute Center of Mass for any ROI. It considers as mass only the surface of the ROI, not all its volume. The principal axis of inertia momentum is also computed and stored in MNPS.LOG. The angle of the axis is stored too.
• Bug correction regarding NUM LOCK state.