Advanced techniques in image-guided brain and spine surgery - download pdf or read online

By Isabelle M. Germano

A finished evaluation of the state of the art expertise at the moment to be had for neuronavigation. it's going to give you the reader with the scientific purposes of this know-how to numerous points of cranial and spinal surgical procedure.

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2–3). Although FLE, FRE, and TRE are actually vector quantities, they are generally reported as scalar values that are the lengths of the vectors. , rms[FLE] ϭ 2ͳFLE 2 ʹ, where the C FIGURE 2–6. Illustration of point-based registration and the various types of errors. (A). , an image) of the head with four fiducial markers (solid circles) outside the head and one target (filled circle) inside the head. (B). , another image or physical space) of the same head. For the second view, the fiducial markers are solid squares and the target is a filled square.

Haacke et al5). The resonance of hydrogen protons placed in a magnetic field produces radio waves. The frequency of the N-shaped fiducial localization systems typically used in stereotactic frame systems are immune to image voxel dimension error and tilt angle error. The development and success of point-based and surface-based frameless IGS systems is due in large part to substantial improvement in the geometrical fidelity of images produced by current scanners. pgsI 16 2/28/02 10:42 AM Page 16 Principles and Technology radio wave signal is proportional to the strength of the local magnetic field.

However, it is important to note that, although the economic consideration may be substantial, it does not alter the highly variable ways in which diagnostic images are acquired. Typically successful and accurate image registration is best obtained using prospectively acquired images following a protocol specifically designed for IGS. Examples of important image acquisition factors are field of view, voxel dimensions (especially slice thickness), and considerations that impact geometric fidelity.

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