Patent ID: 8873597

Claim:
A method for adjusting laser beams ( 4 ) for scanners arranged on a support, notably dedicated to radiotherapy, which is positioned on said support, by means of a device which consists of a single one-piece assembly ( 1 ) comprising a certain number of distinct parts, and assembled in a non-dismantleable manner, which includes both a certain number of position sensors ( 3 ), and an electronic control board ( 8 ) suited to the one-piece structure of said assembly ( 1 ), said sensors ( 3 ) making it possible to visualize the exact position of said beams ( 4 ), so as to accurately adjust them automatically by motor-driven systems, wherein it comprises the following steps: installing the apparatus ( 1 ) on the table of the scanner; presetting the position using the three supporting feet ( 6 ) and the embedded spirit levels ( 7 ); moving the table of the scanner to position the front face ( 11 ) of the apparatus in the plane of the isocenter of the scanner, and a positioning using the internal lasers of the scanner; acquisition of images, wherein the images obtained make it possible to check the correct position of the apparatus ( 1 ) by using at least 4 centering balls ( 5 ) present on the front face ( 11 ); finalizing the position of the apparatus; once the position is validated, moving the table of the scanner by the nominal distance between the machine isocenter and the laser isocenter, wherein this distance is set, which is determined and validated at the time of installation of the lasers; connecting the apparatus ( 1 ) to a PC tablet controlling the positions of the laser beam ( 4 ); powering the apparatus ( 1 ) up, powering the lasers beams ( 4 ) up and re-setting the positions to zero; starting up the laser beam ( 4 ) search sequence by multiplexing, wherein the position of each laser beam ( 4 ) is then determined using the embedded cells ( 3 ) in the apparatus ( 1 ); doing the acquisition of the values and transfer to the tablet PC of the adjustment phase of each laser beam ( 4 ).