PURPOSE: To develop a method for direct measurement, using anatomic specimens, of the precision of MR-guided stereotaxic location and to describe its application to a 1.5-T MR unit with a Leksell stereotaxic frame. METHODS: Small pieces of gel foam ( 1 X 1 X 1 mm), soaked in gadopentetate dimeglumine, were stereotaxically introduced into formalin-fixed human heads using a Leksell D (three exper...

Since the brain structure of neonatal rats was not fully formed during first 4 days, it cannot be detected using ultrasound. The objective this study to investigate use ultrasound detect changes in normal coronal and determine puncture depth location cortex, hippocampus, lateral ventricle, striatum newborn Sprague–Dawley (SD) 5−15 days. animal placed a prone position. specific positions were me...

In bats conventional stereotaxic methods do not yield sufficient positional accuracy to allow reliable recordings and tracer injections in subnuclei of the auditory system. In a newly developed stereotaxic system experimentally measured patterns of skull profile lines are used to define the animal's brain position with an accuracy of +/- 100 microns. By combining the neurophysiological stereota...

Stereotaxic biopsy under computed tomographic (CT) control has become a routine procedure in neurosurgical practice and has a high degree of accuracy with a low morbidity [14]. Magnetic resonance (MR) imaging has some advantages over CT in studying the brain and may reveal cerebral lesions where little or no sign is evident with CT [5, 6] . The MR imaging features not seen with CT are usually w...