Imaging fixation and localization system

摘要

The present invention relates to a method and apparatus for leision localiztion and stereotactic placement of probes into the body utilizing an imaging system such as magnetic resonance imaging or computerized tomography. Localization of the probe with reference to the device itself is accomplished by providing a base which includes a base localization grid and at least one localizing side member which includes a side localization grid. Extremely accurate placement of the probe within the body is accomplished by providing a spanning member to which a probe holder is attached. The spanning member is designed so as to be attachable to the base at any angle in the sagittal plane with respect to the base. The stereotactic device is assembled from materials having relatively low radiodensity to be substantially transparent to the form of energy used to generate the image used for probe guidance. By constructing the device from such materials and enabling the spanning member to be oriented at any angle with respect to the base, the device ensures that the probe remains within the same CT or MRI image so that it is easy to determine needle placement in any rescan. The stereotactic device also preferably includes a precompression means to compress soft tissue in the area of the probe entry point before penetration. The precompression means minimizes mislocation of the probe resulting from soft tissue compression. A respiration feedback means which directly measure respiratory volume is also preferably provided to enable a patient upon whom a biopsy or diagnostic procedure is being performed to control the patient's degree of respiration. The feedback means can thus ensure that each scan is taken in the same phase of respiration.