Patient monitoring at radiation machines
AssigneeC-Rad Positioning AB
InventorKristofer Maad
Life of this patent
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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.
Claims29
A patient monitoring arrangement adapted for use in connection with a radiation system comprising a radiation gantry including a tubular opening and an associated patient couch, said patient monitoring arrangement comprises:
- a pattern projector configured to project a two or three dimensional pattern onto at least a portion of a patient positioned on said patient couch, said pattern extending at least partly into said tubular opening of said radiation gantry adapted for receiving said patient couch;
- a first pattern detector arranged on a front side of said radiation gantry including said tubular opening, for detecting at least a first portion of said pattern on said patient and generating first detection data based on said detected at least a first portion;
- a second pattern detector arranged on an opposite back side of said radiation gantry including said tubular opening, for detecting at least a second portion of said pattern on said patient and generating second detection data based on said detected at least a second portion;
- and
- a pattern analyzer connected to said first pattern detector and said second pattern detector for generating information representative of movement of said patient on said patient couch based on first detection data and said second detection data.
A patient monitoring arrangement adapted for use in connection with a radiation system comprising a radiation gantry and an associated patient couch, said patient monitoring arrangement comprises:
- a pattern projector configured to project a two or three dimensional pattern onto at least a portion of a patient positioned on said patient couch, said pattern extending at least partly into an opening of said radiation gantry adapted for receiving said patient couch;
- a first pattern detector arranged on a front side of said radiation gantry for detecting at least a first portion of said pattern on said patient and generating first detection data based on said detected at least a first portion;
- a second pattern detector arranged on an opposite back side of said radiation gantry for detecting at least a second portion of said pattern on said patient and generating second detection data based on said detected at least a second portion,
- wherein
- a detected part of said at least a first portion of said pattern detected by said first pattern detector is not in the field of view of said second pattern detector, or
- a detected part of said at least a second portion of said pattern detected by said second pattern detector is not in the field of view of said first pattern detector;
- and
- a pattern analyzer connected to said first pattern detector and said second pattern detector configured to generate information representative of movement of said patient on said patient couch based on said first detection data and said second detection data generated based on said at least a first portion of said pattern and said at least a second portion of said pattern, and to obtain information representative of the patient movement detected from the front side of the radiation gantry and from the back side of the radiation gantry.
A patient monitoring method comprising:
- projecting a line onto at least a portion of a patient positioned on a patient couch associated with a radiation gantry, said line being substantially parallel with an anteroposterior axis of said patient and extending at least partly into an opening of said radiation gantry adapted for receiving said patient couch;
- detecting, on a front side of said radiation gantry, at least a first portion of said line on said patient;
- generating first detection data based on said detected at least a first portion;
- detecting, on an opposite back side of said radiation gantry, at least a second portion of said line on said patient;
- generating second detection data based on said detected at least a second portion;
- and
- generating information representative of movement of said patient on said patient couch based on first detection data and said second detection data.
Dependencies are inferred from the claim text.