Radiation therapy imaging apparatus
This patent describes a radiation therapy imaging apparatus for providing images in a patient being treated on a radiation therapy apparatus for verification and monitoring of patient positioning and verification of alignment and shaping of the radiation field of the radiation therapy apparatus. It comprises: a high-energy treatment head for applying a radiation dose to a patient positioned on a treatment table, and a gantry rotatable about an isocentric axis and carrying the treatment head for permitting the radiation dose to be applied to the patient from any of a range of angles about the isocentric axis; the radiation therapy imaging apparatus including a radiation therapy image detector which comprises a video camera mounted on the gantry diametrically opposite the treat head, an elongated light-excluding enclosure enveloping the camera to exclude ambient light from the camera, a fluoroscopic plate positioned on a distal end of the enclosure remote from the camera and aligned with the head to produce a fluoroscopic image in response to radiation applied from the head through the patient, mirror means in the enclosure and oriented for reflecting the image to the camera to permit monitoring on a viewing screen of the position of the radiation field in respect to the patient, and means for retracting at least the distal end of the enclosure from a position in which the fluoroscopic plate is disposed opposite the treatment head without disturbing the position of the camera on the gantry, so that the enclosure can be collapsed and kept from projecting under the treatment table when the patient is being positioned on the treatment table.
- Assignee:
- Sands Inficon, Inc., Liverpool, NY (USA)
- Patent Number(s):
- US 4995068; A
- Application Number:
- PPN: US 7-415994
- OSTI ID:
- 5735479
- Resource Relation:
- Patent File Date: 2 Oct 1989
- Country of Publication:
- United States
- Language:
- English
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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
IMAGE SCANNERS
RADIATION DETECTORS
RADIOTHERAPY
IMAGE PROCESSING
CAMERAS
MEASURING INSTRUMENTS
MEDICINE
NUCLEAR MEDICINE
PROCESSING
RADIOLOGY
THERAPY
550602* - Medicine- External Radiation in Diagnostics- (1980-)
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments