EDR2 Film

EDR2 Film - Dose Response for Evaluation 

Exact dose responses are a function of facility dependent factors including processing conditions (processing time, processing temperature, processing equipment, processing chemistry), the density sampling (digitizer equipment and calibration), and exposure monitoring equipment. The exact response relationship should be measured and verified for the local conditions. The films should be processed using recommendations found in Service Bulletin #30.  

Measurement Technique
The dose response of a film should be measured using appropriate amounts of build-up and backscatter material. Many references have discussed methodology for measuring the response of a film. A few of these are:

• M. D. C. Evans and L. J. Schreiner, "A simple technique for film dosimetry," Radiother. Oncol. Vol 23, pages 265–267, 1992.
• J. I. Hale, A. T. Kerr, and P. C. Shragge, "Calibration of film for accurate megavoltage photon dosimetry," Med. Dosimetry Vol 19, pages 43–46, 1994.
• Inhwan J. Yeo, C-K Chris Wang, and Sandra E. Burch, "A filtration method for improving film dosimetry in photon radiation therapy," Medical Physics Vol 24, pages 1943–1953, December 1997.
• J. L. Robar and B. G. Clark, "The use of radiographic film for linear accelerator stereotactic radiosurgical dosimetry," Medical Physics Vol 26, pages 2144–2150, 1999.

EDR2 Other READY-PACK Films 

The selection of the appropriate film depends on the application and the exposure range of interest.

The table below summarizes the approximate active ranges and saturation points for Ready-Pack films commonly used in radiation therapy departments. This information may be helpful when considering their use in various applications, including relative and absolute dosimetric measurements:

* No longer available in the United States.

EDR2 film comes in two different sizes:

• 10 x 12 in
• 35 x 43 cm