Improved dose homogeneity in the breast using tissue compensators.

The improvements achievable by introducing individual tissue compensators in photon therapy of the breast were assessed. In 37 patients the dose ranged from +15% to -10% of the mid target dose using combinations of wedge filters and beam weights alone. With a tissue compensator the dose ranged from +4% to -11% provided that allowance was made for lung attenuation. A megavoltage imaging system is a potential source of the X-ray transmission data which can provide a basis for the calculation of thickness of the compensator.

[1]  J Milan,et al.  The storage and manipulation of radiation dose data in a small digital computer. , 1974, The British journal of radiology.

[2]  C Westbrook,et al.  Quality assurance in daily treatment procedure: patient movement during tangential fields treatment. , 1991, Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology.

[3]  D. G. Lewis,et al.  A linear array, scintillation crystal-photodiode detector for megavoltage imaging. , 1991, Medical physics.

[4]  Michael Goitein,et al.  Applications of Computed Tomography in Radiotherapy Treatment Planning , 1982 .

[5]  L. Asbury,et al.  Achieving uniform dose with the use of a custom tissue compensator and a leveled beam for tangential breast fields. , 1989, Medical dosimetry : official journal of the American Association of Medical Dosimetrists.

[6]  D. McShan,et al.  The influence of lung density corrections on treatment planning for primary breast cancer. , 1988, International journal of radiation oncology, biology, physics.

[7]  J. Breneman,et al.  Incorporation of patient immobilization, tissue compensation and matchline junction technique for three-field breast treatment. , 1988, Medical dosimetry : official journal of the American Association of Medical Dosimetrists.

[8]  R. Siddon,et al.  Three-dimensional photon dose distributions with and without lung corrections for tangential breast intact treatments. , 1989, International journal of radiation oncology, biology, physics.

[9]  S Webb,et al.  Clinical dosimetry for radiotherapy to the breast based on imaging with the prototype Royal Marsden Hospital CT simulator. , 1987, Physics in medicine and biology.