.decimal Products - Bolus Electron Conformal Therapy (ECT)

Compensators

Bolus Electron Conformal Therapy (Bolus ECT) uses a single electron beam with a variable thickness bolus compensator, which contains the PTV while delivering dose. Bolus ECT is a very useful and advantageous methodology for treating superficial target volumes and for those with critical structures underlying the PTV. Bolus ECT can create favorable dose distributions for certain tumors of the chest wall, head and neck, and other sites where a tumor volume has spread out near the patient surface and rendered photon treatment (even IMRT) problematic for a variety of reasons.

Advantages

  • Creates favorable dose distributions
  • Delivers minimal dose to underlying critical structures
  • Fast treatment time
  • Fast planning time

Treatment Sites

  • Chest Wall
  • Head and Neck
  • Paraspinal
  • Other superficial lesions
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Conclusions from Clinical Publications:

“A bolus can provide considerable sparing of normal tissues when using a posterior electron beam to irradiate the paraspinal muscles.”

“Computer-Aided Design and Fabrication of an Electron Bolus for Treatment of the Paraspinal Muscles”
Low et al., Int. J. Radiation Oncology Biol. Phys., 1995

“The use of custom 3D electron bolus for PMI is an effective method for optimizing dose delivery. The radiation dose distribution is highly conformal, dose heterogeneity is reduced compared to standard techniques in certain suboptimal settings, and excellent immediate outcome is obtained.”

“A Custom Three-Dimensional Electron Bolus Technique for Optimization of Postmastectomy Irradiation”
Perkins et al., Int. J. Radiation Oncology Biol. Phys., 2001

“Intensity-modulated electron beams could significantly improve the dose homogeneity in the PTV for patients treated with electron conformal therapy using shaped bolus.”

“Electron Conformal Radiotherapy Using Bolus and Intensity Modulation”
Kudchadker et al., Int. J. Radiation Oncology Biol. Phys., 2002

“Modulated Electron Therapy is a modality that offers improved electron therapy for patients, particularly those having critical structures underlying the PTV. Methods for Bolus ECT are well refined, and the clinical utility of this modality has been demonstrated for chest wall and head and neck cancers.”

“Modulated Electron Therapy”
Hogstrom et al., American Association of Physicists in Medicine, 2003

Material Safety Data Sheet: Machinable Wax