Please Fax / Mail Me, at Your Earliest Convenience, the Following Dosimetry Data to Expedite

Dosimetry Data Requested

Please send the following dosimetry data via email at your earliest convenience to the physicist performing the site visit, or to [email protected].

I. COMPLETED FORMS (blank forms attached are also available at http://IROCHouston.mdanderson.org):

Along with the IROC Houston forms for the following items, please include copies of the indicated documents.

Instrumentation: Calibration certificates (Ion chambers & Electrometers) Photons: Most recent yearly output calibration (various factors & calculations) Electrons: Most recent yearly output calibration (various factors & calculations) Brachytherapy: Source-strength certificates

II. PHOTONS:

Generate plans from your treatment planning system (TPS) for a 45cm x 45cm x 45cm water phantom. For each of the following setups, obtain MU and point-doses.

Create a copy of the excel sheet ”photon beam data form.xls” for each photon beam in clinical operation. Fill out and email Tables 1-4 for each photon beam to the physicist site visiting your facility or to [email protected], prior to the site visit. Please retain and submit hard copies of the plans during the site-visit.

a) PDD & Output Factors: Generate plans to fill in Table 1.

b) Wedge Transmission: Generate plans to fill in Table 2, for clinical and frequently used wedges (eg. lower, upper, EDW, virtual, etc.). If multiple types of wedges are used clinically, then complete Table 2 for each type.

d) Profile data at dmax: Off center ratio (OCR) for the largest field size and fill in Table 3.

e) Small field-size output factors: Generate plans to fill in Table 4. For Varian machines, use MLC to generate these field sizes while maintaining the secondary jaws at a 10 cm x 10 cm.

Please also have the dosimetry data book on hand for the site visit, including Wedge/Tray factors, tables of %DD, TMR & Output factors.

D:\Docs\2017-12-16\090d619743c46c5bebe7783dd8770064.doc III. ELECTRONS: For the cadre of elelctron beams, create a copy of the excel sheet “electron beam data form.xls” for each accelerator with electrons in clinical operation. Fill out and email Table 5 for each accelerator to the physicist site visiting your facility or to [email protected], prior to the site visit. For b) through d), please have the data on hand at time of site visit.

a) Fill out table 5, providing depths for 80% and 50% dose as well as Imax.

b) Cone ratios (output factors) for nominal and extended SSDs

c) PDD (NOT ionization) for standard SSD & standard Cone Size: tabular data.

Include depth of output calib. (where clinical output is 1.000 cGy/mu)

d) Dose calculation technique for extended SSD = 110 cm

(if use VSD, please include table of VSD values)

IV. BENCHMARK CASES The benchmark cases can be downloaded from the IROC Houston’s website (http://IROCHouston.mdanderson.org). On the top bar there is a hot button labeled “on-site audits”. Under this you will find a link to the benchmark cases. There are four cases; Brain, Breast, Cranial- Spinal and Mantle. Please plan all 4 cases following the directions which are posted on the website. Please submit the treatment plan electronically to the ITC at http://atc.wustl.edu, as well as forward a color hardcopy or electronic version of the data to the IROC Houston at:

Electronic address: [email protected]

Mailing address: UTMD Anderson Cancer Center IROC Houston QA Center Attn: Dosimetry 8060 El Rio St Houston, TX 77054

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