ASSESSMENT OF MR IMAGE DEFORMATION FOR STEREOTAXIC NEUROSURGERY USING A TAGGING SEQUENCE

A tagging sequence is used to assess MR image deformations before a stereotactic neurosurgical procedure, in a test model and in two patients. This pulse sequence superimposes narrow parallel orthogonal tag lines on an image, which can be used as an internal reference frame. Image deformation is directly related to surface area variations in the squares produced by the tagging-sequence pulses. Small spatial deformations of the tags can be detected on the images used for measuring stereotactic-target spatial coordinates. A threshold of 2 SD guarantees that the distortion is smaller than one pixel.


Published in:
AMERICAN JOURNAL OF NEURORADIOLOGY, 15, 1, 45-49
Year:
1994
Publisher:
AMER SOC NEURORADIOLOGY
ISSN:
0195-6108
Keywords:
Laboratories:




 Record created 2015-01-08, last modified 2018-09-13


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)