STEREOTAXIC LOCALIZATION WITH MAGNETIC-RESONANCE-IMAGING - A PHANTOM STUDY TO COMPARE THE ACCURACY OBTAINED USING 2-DIMENSIONAL AND 3-DIMENSIONAL DATA ACQUISITIONS
L. Walton et al., STEREOTAXIC LOCALIZATION WITH MAGNETIC-RESONANCE-IMAGING - A PHANTOM STUDY TO COMPARE THE ACCURACY OBTAINED USING 2-DIMENSIONAL AND 3-DIMENSIONAL DATA ACQUISITIONS, Neurosurgery, 41(1), 1997, pp. 131-137
OBJECTIVE: To compare the accuracy of stereotactic localization using
magnetic resonance imaging (Siemens 1.5-T Magnetom; Siemens, Erlangen,
Germany) with two-dimensional and three-dimensional data acquisition
techniques. METHODS: A phantom study was performed in which the coordi
nates of an array of rods were determined from images in both two-dime
nsional and three-dimensional studies and compared with measured value
s in a series of transverse, coronal, and sagittal images. RESULTS: Th
e results demonstrated a distinct advantage in using three-dimensional
acquisition; an error greater than 2 mm was identified in only 0.8% o
f the imaged volume, compared with 12% of the imaged volume in the two
-dimensional study. CONCLUSION: The results indicate that more accurat
e stereotactic localization is achieved with a three-dimensional acqui
sition.