Surgery – Truss – Pad
Patent
1992-01-13
1993-08-10
Cohen, Lee S.
Surgery
Truss
Pad
378 65, A61B 505
Patent
active
052339904
ABSTRACT:
An apparatus for diagnostic and verification imaging in radiation therapy that consists of attachments for standard radiotherapy equipment comprising an x-ray tube and an x-ray detector placed on opposite sides of a patient along the main axis of the beam produced by the treatment unit. The detector is placed on a plane orthogonal to the axis of the treatment beam and between the beam source and the patient, while the x-ray tube is placed on the other side of the patient, coaxially with the treatment beam and facing the detector. As a result of this configuration, the radiographic view of the x-ray beam, as seen on the detector, is equivalent to the view produced on the same detector by the therapeutic beam, varied only by parallax deviations that can be corrected by geometrical calculations. Accordingly, x-ray exposures and real-time verification of the position of a patient can be obtained with the same unit used for treatment and without requiring movement of either patient or equipment. In addition, the apparatus enables a user to produce diagnostic images that can be used directly to manufacture shielding blocks in conventional shielding-block cutters.
REFERENCES:
patent: 3783251 (1974-01-01), Pavkovich
patent: 4123660 (1978-10-01), Horwitz
patent: 4930509 (1990-06-01), Brisson
Droege, R. T. et al., "Influence of Metal Screens on Contrast in Megavoltage X-Ray Imaging," Med. Phys. 6, 487-492, 1979.
Lutz, W. R. et al., "A Test Object for Evaluation of Portal Film" Int. J. Radiat. Oncol. Biol. Phys. 11, 631-634, 1985.
Munro, P. et al., "Therapy Imaging: A Signal-to-Noise Analysis of Metal Plate/Film Detectors," Med. Phys. 14, 975-984, 1987.
Mark, J. E. et al., "The Value of Frequent Treatment Verification Films in Reducing Localization Error in the Irradiation of Complex Fields," Cancer, 37, 2755-2761, 1976.
Huizenga et al. "Accuracy in Radiation Field Alignment in Head and Neck Cancer: A Prospective Study," Rad. Oncol. 11, 181-187, 1988.
Pearcy et al., "The Impact of Treatment Errors on Post-Operative Radiotherapy for Testicular Tumors," Br. J. Radiol. 58, 1003-1005, 1985.
Rabinowitz et al. "Accuracy of Radiation Field Alignment in Clinical Practice," Int. J. Radiat. Oncol. Biol. Phys. 11, 1857-1867, 1985.
Lam et al. "On-Line Measurement of Field Placement Errors in External Beam Radiotherapy," Br. J. Radiol. 60, 361-367, 1987.
Baily et al. "Fluoroscopic Visualization of Megavoltage Therapeutic X-Ray Beams," Int. J. Radiat. Oncol. Biol. Phys. 6, 935-939, 1980.
Herk et al., "A Digital Imaging System for Portal Verification," in The Use of Computers in Radiation Therapy, I. Brunvis Ed., North Holland, 371-373, 1987.
Shalev et al. "Video Techniques for On-Line Portal Imaging," Comp. Med. Imag. Graph. 13, 217-226, 1989.
Munro et al. "A Digital Fluoroscopic Imaging Device for Radiotherapy Localization," Int. J. Radiat. Oncol. Biol. Phys. 18, 641-649, 1990.
Durham et al. "Portal Film Quality: A Multiple Institutional Study," Med. Phys. 11, 555-557, 1984.
Biggs et al. "A Diagnostic X-Ray Field Verification Device for a 10 MV Accelerator," Int. J. Radiat. Oncol. Biol. Phys. 11, 635-643, 1985.
Marks J. E. et al. "Localization in the Radiotherapy of Hodgkins Disease and Malignant Lymphoma with Extended Mantle Fields," Cancer 34, 83-90, 1974.
Marks J. E. et al. "Dose-Response Analysis for Nasopharyngeal Carcinoma: An Historical Perspective," Cancer 50, 1042-1050 1982.
White J. E. et al. "The Influence of Radiation Therapy Quality Control on Survival, Response and Sites of Relapse in Oat Cell Carcinoma of the Lung, " Cancer 50, 1084-1090, 1982.
Kinzie J. J. et al. "Patterns of Care Study: Hodgkins Disease Relapse Rates and Adequacy of Portals, " Cancer 52, 2223-2226, 1983.
Cohen Lee S.
Durando Antonio R.
Gilbert Samuel
Weiss Harry M.
LandOfFree
Method and apparatus for diagnostic imaging in radiation therapy does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for diagnostic imaging in radiation therapy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for diagnostic imaging in radiation therapy will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1719058