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Stereotactic Localization with Magnetic Resonance Imaging: A Phantom Study To Compare the Accuracy Obtained Using Two-dimensional and Three-dimensional Data Acquisitions

1997; Lippincott Williams & Wilkins; Volume: 41; Issue: 1 Linguagem: Inglês

10.1097/00006123-199707000-00027

1524-4040

Lee Walton, A. Hampshire, David Förster, Andras A. Kemeny,

Anatomy and Medical Technology

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 coordinates of an array of rods were determined from images in both two-dimensional and three-dimensional studies and compared with measured values in a series of transverse, coronal, and sagittal images. RESULTS: The results demonstrated a distinct advantage in using three-dimensional acquisition; an error greater than 2 mm was identified in only 0.8% of the imaged volume, compared with 12% of the imaged volume in the two-dimensional study. CONCLUSION: The results indicate that more accurate stereotactic localization is achieved with a three-dimensional acquisition.