Radiant energy – Radiation controlling means
Reexamination Certificate
2006-03-21
2006-03-21
Berman, Jack I. (Department: 2881)
Radiant energy
Radiation controlling means
C378S150000
Reexamination Certificate
active
07015490
ABSTRACT:
A method and apparatus to determine an optimum collimator angle of a multi-leaf collimator having an opening and multiple leaf pairs for closing portions of the opening to form a radiation beam arrangement having multiple radiation beam segments. The method and apparatus include application of a cost function to determine a collimator angle which provides for delivery efficiency and target conformity. The user can preferentially either selectively enhance delivery efficiency of the radiation beam arrangement, reducing a number of radiation beam segments and reducing a number of radiation beam monitor units required for delivery of the desired prescription, or selectively enhance conformity of the radiation beam arrangement to a target shape. The optimum collimator angle is then used for delivery of an optimized radiation beam arrangement to a patient by a radiation delivery device.
REFERENCES:
patent: 4672212 (1987-06-01), Brahme
patent: 5596619 (1997-01-01), Carol
patent: 5802136 (1998-09-01), Carol
patent: 5818902 (1998-10-01), Yu
patent: 6393096 (2002-05-01), Carol et al.
patent: 6907105 (2005-06-01), Otto
patent: 2003/0086530 (2003-05-01), Otto
patent: 2004/0190680 (2004-09-01), Chang
patent: 2005/0111621 (2005-05-01), Riker et al.
Du M N et al., article titled “A Multileaf Collimator Field Prescription Preparation System For Conventional Radiotherapy,” International Journal of Radiation Oncology Biology Physics UK, vol. 32, No. 2, 1995, pp. 513-520 (1995).
Shephard D M et al., articled titled “Direct aperture optimization: A turnkey solution for step-and-shoot IMRT,” Medical Physics, American Institute of Physics, New York, US, vol. 29, No. 6, Jun. 2002, pp. 1007-1018, XP012011807 ISSN: 0094-2405.
Beavis A W et al., article titled “Optimisation of MLC orientation to improve accuracy in the static field delivery of IMRT,” Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (CAT. No. 00CH37143) IEEE Piscataway, NJ, USA, vol. 4, Jul. 2000, pp. 3086-3089 vol., XP002308750 ISBN.
Frazier A et al., article titled “Dosimetric Evaluation of the Conformation of the Multileaf Colliomator to Irregularly Shaped Fields,” International Journal of Radiation Oncology Biology Physics Elsevier UK, vol. 33, No. 5, 1995, pp. 1229-1238, XP002308751 ISSN: 0360-3016.
Wang et al., article titled “A New Algorithm for Determining Collimator Angles that Favor Efficiency in MLC based IMRT Delivery,” Medical Physics AIP for American Assoc. Phys. Ed. USA, vol. 31, No. 5, Apr. 23, 2004, pp. 1249-1253, XP002308753 ISSN: 0094-2405, the whole document.
Samuelsson A et al., article titled “Intensity modulated radiotherapy treatment planning for dynamic multileaf collimator delivery: influence of different parameters on dose distributions,” Radiotherapy and Oncology Elsevier Ireland, vol. 66, No. 1, Jan. 2003, pp. 19-28, XP002308752 ISSN: 0167-8140.
Hill Robert W.
Lam Simon Chun-pin
Wang Duan Qiang
Berman Jack I.
Bracewell & Giuliani LLP
Nomos Corporation
LandOfFree
Method and apparatus for optimization of collimator angles... 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 optimization of collimator angles..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for optimization of collimator angles... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3545049