After the head frame is in place, it is time for imaging to be done; such as magnetic resonance imaging (MRI), computer tomography (CT) or angiography. Imaging is required to determine the exact size, shape and position of the target in the brain. During imaging, a coordinate box is placed on the head frame to provide reference points on the images for the surgical plan. After imaging, the coordinate box is removed.
International Gamma Knife Clinics 2006.
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