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research article
Assessment of MR image deformation for stereotactic 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.
Type
research article
Web of Science ID
WOS:A1994MT25700008
Authors
Publication date
1994
Publisher
Published in
Volume
15
Issue
1
Start page
45
End page
49
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
January 8, 2015
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