Abstract: A computer-implemented tumor position determining model is trained, based on a plurality of sets of image data, to determine a subsequent position of a tumor in a subject based on a subsequent 2D or 3D representation of a surface of the subject, an initial image of the tumor in the subject and an initial 2D or 3D representation of a surface of the subject. Each set of image data comprises an initial training image of a tumor in a subject, an initial training 2D or 3D representation of a surface of the subject, a subsequent training image of the tumor in the subject and a subsequent training 2D or 3D representation of a surface of the subject. The subsequent training image and the subsequent training 2D or 3D representation are taken at a subsequent point in time than the initial training image and the initial training 2D or 3D representation and the plurality of sets of image data are from a plurality of different subjects.

Abstract: The invention involves monitoring patient movement, in particular respiratory movement, of a patient (30) positioned on a couch (20) in connection with a radiation gantry (10). A 2D or 3D pattern (115) is projected onto the patient (30). At least a first portion of the pattern (115) is detected by a first detector (120) arranged on a first side of the gantry (10). At least a second portion of the pattern (115) is detected by a second detector (130) arranged on a second opposite side of the gantry (10). Pattern detection data is generated by the two detectors (120, 130) and is used for generating information representative of movement of the patient (30) on the couch (20). The information can be used, for instance, for prospective and/or retrospective gating.

Abstract: A positioning system comprises a pattern projector (70) for projecting a 2D/3D pattern (45) onto an object surface. The 2D/3D pattern (45) is detected by a detector (80, 85), which generates a detection signal that is employed by a pattern analyzing circuit (110) for generating a surface representation of the object surface. A correction analyzing circuit (130) generates a correction signal representative of a discrepancy in position and/or posture of the surface representation relative a stored reference surface representation. The correction signal is employed to generate information (55, 56) that is projected by a light projector (70, 75) onto the object surface. The projected information (55, 56) is indicative of the determined discrepancy in object position and/or posture.

Abstract: A positioning system comprises a pattern projector (70) for projecting a 2D/3D pattern (45) onto an object surface. The 2D/3D pattern (45) is detected by a detector (80, 85), which generates a detection signal that is employed by a pattern analyzing circuit (110) for generating a surface representation of the object surface. A correction analyzing circuit (130) generates a correction signal representative of a discrepancy in position and/or posture of the surface representation relative a stored reference surface representation. The correction signal is employed to generate information (55, 56) that is projected by a light projector (70, 75) onto the object surface. The projected information (55, 56) is indicative of the determined discrepancy in object position and/or posture.

Abstract: The invention involves monitoring patient movement, in particular respiratory movement, of a patient (30) positioned on a couch (20) in connection with a radiation gantry (10). A 2D or 3D pattern (115) is projected onto the patient (30). At least a first portion of the pattern (115) is detected by a first detector (120) arranged on a first side of the gantry (10). At least a second portion of the pattern (115) is detected by a second detector (130) arranged on a second opposite side of the gantry (10). Pattern detection data is generated by the two detectors (120, 130) and is used for generating information representative of movement of the patient (30) on the couch (20). The information can be used, for instance, for prospective and/or retrospective gating.