| 摘要 |
<p>Repeat fixation for medical procedures is accomplished using a non-invasive locator, specifically a bite plate (26). The bite plate has at least three fiducial markers on it. The fiducial markers may be LEDs (162), radiopaque markers for angiography, or computerized tomography (CT) imaging, or magnetic resonance markers for magnetic resonance (MR) imaging. By detecting the position of the markers, the position of features within the patient (such as a brain tumor) can be determined with great precision. Since the bite plate (26) has been molded to uniquely fit to the patient's teeth, it may be removed after an initial imaging of the patient. The bite plate (26) may then be reattached one or more times to the teeth. An alternate embodiment uses a head ring (18) or head holder such as a head mask system (276) with the LEDs thereon.</p> |
