ARRANGEMENT AND REFERENCE MEANS TO DIRECT A BEAM IN RADIATION THERAPY

摘要

The present invention concerns an arrangement and a reference method for the precision aiming of a radiation beam for treating an internal cancer tumour in a patient. The method of treatment includes that least one reference marker introduced into the patient in a defined position in relation to the cancer tumour, whose geometry is determined and the treatment planned in relation to the reference marker by means of computer tomography/tomography, that the patient is by known means brought into position for the treatment, that a defined point in the cross section of the beam is defined by a sight, that the patient with at least one said reference marker in the said defined position is initially treated with radiation, that the positions of the reference marker or the reference markers and the sight in relation to one another are read with the help of the beam that passes through the patient, and that the positions in relation to one another are adjusted to ensure that the treatment beam is directed precisely at the cancer tumour before the remaining doses of radiation are given to the patient. The device according to the invention includes known treatment equipment (1) for emitting a treatment beam (2) with a defined cross section (5) and a device (3) for supporting the patient, whereby the characteristics of the device include that at least one reference marker (7) is introduced into the patient in relation to which the position of the cancer tumour is determined, that a sight (4) is arranged in the path of the beam to define a point in the cross section of the beam, that a device to read the beam (6) is arranged to receive the beam that has passed through the patient and visualise the position of at least one said reference marker (7') and the position of the sight (4'), whereby the position of the beam in relation to the cancer tumour is determined.