Modelling mould attenuation for liquid metal compensators

• Autorzy: Goodband J. , Haas O. , Mills J.
• Języki publikacji: EN

Abstrakty

EN

The paper reports on investigative work into the possibility of using a liquid-metal (e.g., mercury), as a viable substitute for solid metals in intensity-modulated radiation therapy (IMRT). As part of this work, the use of moulded plastic containers is studied. The attenuation characteristics of the moulds are found to significantly affect the accuracy of a dose distribution model. An algorithm is therefore devised to predict the change in attenuation properties and is integrated into the model, thereby halving the maximum predictor error.

Słowa kluczowe

EN

liquid metal; predictive control; compensation; solid metal; mould attenuation; radiation therapy

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Systems Science
• Rocznik: 2005
• Tom: Vol. 31, no 1
• Strony: 45--52
• Opis fizyczny: Bibliogr. 12 poz., rys., wykr.

Twórcy

autor

Goodband J.

• Control Theory and Applications Centre, Coventry University, Priory Street, Coventry, U.K

autor

Haas O.

• Control Theory and Applications Centre, Coventry University, Priory Street, Coventry, U.K

autor

Mills J.

• Radiotherapy Physics, Walsgrave Hospital, Clifford Bridge Road Coventry, U.K.

Bibliografia

• [1] Anton H., Rorres C., Elementary Linear Algebra: Application Version, 7th ed. John Wiley & Sons, 1944.
• [2] Bakai A., Laub W. U., Nusslin F., Compensators for IMRT - An Investigation in Quality Assurance, Medical Physics, Vol. 11, No. 1, 2001, 15-22.
• [3] Dimitriadis D. M., Fallone B. G., Compensators for Intensity-Modulated Beams, Medical Dosimetry, Vol. 11, No. 3, 2002, 215-220.
• [4] Goodband J. H., Haas O. C. L., Mills J. A., Attenuation of 6MV X-rays using mercury compensators, Proceedings of 16th ICSE, ICSE 2003.
• [5] Haas O. C. L., Radiotherapy Treatment Planning: New Systems Approaches, Advances in Industrial Control Monograph. Springer Verlag, London 1999.
• [6] Hendee W. R., Ibbott G. S., Radiation Therapy Physics, 2nd ed., Mosby, 1996.
• [7] Mageras G. S., Mohan R., Burman C., Compensators for three-dimensional treatment planning. Medical Physics, Vol. 18, No. 20, 1991, 133-140.
• [8] Meyer J., Some limitations in the practical delivery of IMRT, The British Journal of Radiology, Vol. 73, No. 8, 2000, 854-863.
• [9] Meyer J., Burnham K. J., Haas O. C. L., Mills J. A., Parvin E. M., Application of a least-squares parameter estimation approach for 2-D spatial modelling of compensators for IMRT, Transactions of the Institute of Measurements and Control, Vol. 24, No. 5,2002, 369-386.
• [10] Webb S., Intensity-Modulated Radiation Therapy, Series in Medical Physics, Institute of Physics Publishing, Bristol and Philadelphia, 2001.
• [11] Xu T., Shikhaliev P. M., Al-Ghazi M., Molloi S., Reshapeable physical modulator for intensity modulated radiation therapy. Medical Physics, Vol. 29, No. 10, 2002, 2222-2229.
• [12] Yoda K., Aoki Y., a multiportal compensator system for IMRT delivery. Medical Physics, Vol. 30, No. 5, 2003, 880-887.