Patent ID: 6921406

Claim:
A stereotactic device comprising: (a) a frame portion having an opening defining an upper alignment plane; (b) a first planar member comprising a first pair of substantially parallel image-conspicuous lines, said first planar member having a first slot disposed between said first pair of substantially parallel image-conspicuous lines; (c) a second planar member comprising a second pair of substantially parallel image-conspicuous lines, said second planar member having a second slot disposed a between said second pair of substantially parallel image-conspicuous lines; said first planar member overlying said second planar member such that said first pair of substantially parallel image-conspicuous lines forms an angle of about 53 degrees with said second pair of substantially parallel image-conspicuous lines, said first and second planar members adapted to move with respect to one another so as to be capable of providing an aperture, formed by the intersection of said first and second slots, at different positions within said upper alignment plane.