| 摘要 |
A stereotactic surgery apparatus has a probe (31) and a computerized tomographic scanning system. The scanning system comprises a display (28), and means for reconstructing cross-sectional images on said display using data from partial circumferential scans of source (25) and detectors (26) and operating on the data with an algorithm that provides the difference between the local values of the linear attenuation coefficient and average of these values within a circle centered at each reconstruction point. The scanning system includes means maintaining the frames of reference of said probe means and scanning system rigid with respect to one another. The position of the probe, which may be a cryogenic probe, with respect to the actual anatomical structure of the body, particularly a human head (21), may thus be viewed by the surgeon. <IMAGE> |
