| 摘要 |
This invention relates to a fixation device for immobilizing a head of a patient relative a treatment unit or medical device during treatment of the head. Th e fixation device is provided with an interface unit adapted to be fixated in relation to an adaptor unit for connection to the treatment unit, or to a frame for connection to the medical device. Furthermore, the fixation device is further provided with a sliding plate being slidable in relation to said interface unit in an xz-plane of a coordinate system. The system is a Cartesian coordinate system defined by three orthogonal axis having an x-axis extending in the medial-lateral direction of the patient, an y-axis extendin g in the anterior-posterior direction, and a z-axis extending in the cranial-caud al direction. The fixation device is further provided with a plate locking mean s for locking said sliding plate in relation to said interface unit, a bite-block for being inserted into a mouth of the patient, a linking means for linking said bite- block with said sliding plate, at least one pivot point arranged such that the bite--block is movable at least in a plane orthogonal to the xz-plane; and a link locking means for locking said at least one pivot point in a desired positio n in relation to said linking means so as to fixatethe bite-block to the interfac e unit.
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