Physics of Electron Arc Therapy

  • Dennis D. Leavitt
Part of the Medical Radiology book series (MEDRAD)


Electron arc therapy is the application of a long, narrow strip beam of electrons to a superficial treatment volume as the gantry of the linear accelerator is rotated through an arc about the patient. Like photon arc therapy, the dose to a point within the treatment volume is the summation of dose contributions from the electron beam during each degree of arc; however, unlike photon arc therapy, the treatment volume is not irradiated continuously during the entire arc. In this respect, electron arc therapy is similar to moving strip photon therapy in that the irradiating strip is moved sequentially across the treatment surface. Electron arc therapy is ideally suited to the treatment of large superficial volumes in portions of the body having a cylindrical shape such as the thorax, abdomen, arms, or legs, and is less well suited to spherical or ellipsoidal surfaces such as the head.


Dose Distribution Monitor Unit Surface Dose Depth Dose Pencil Beam 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1995

Authors and Affiliations

  • Dennis D. Leavitt
    • 1
  1. 1.Division of Radiation OncologyUniversity of Utah Medical CenterSalt Lake CityUSA

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