Modules / Annual QA / TG-51 Photon

TG-51 Photon

TG-51 + 2014 Addendum photon absolute dose calibration. Part of the Annual QA reference-dosimetry workflow.

Annual QA · reference dosimetry. When this calculation is done, return to the Annual QA checklist tab and record the output drift on the “X-ray / electron output calibration, TG-51” row.

TG-51 photon reference dosimetry (Almond et al. 1999 + 2014 Addendum). Enter the ADCL chamber/electrometer cert values, environment, two-voltage and polarity readings, and PDD(10)_x. The engine computes the corrected output in cGy/MU.

Identity

Machine name

Physicist

Beam energy label

Nominal energy (MV)

Measurement date

Setup geometry

FFF beam

Chamber (per ADCL cert)

Chamber model

Chamber serial

N_D,w (Gy/C)

Chamber cal date

Electrometer (per ADCL cert)

Electrometer model

Electrometer serial

P_elec

Electrometer cal date

Environment

Temperature (°C)

Pressure (kPa)

Humidity (%) optional

Voltages & readings (nC)

Enter M+ and M− as signed raw readings (opposite polarities give opposite signs), per TG-51. M raw, M high and M low are magnitudes at the operating polarity.

V operating

V high

V low

M raw (operating)

M+ (positive polarity)

M− (negative polarity)

M high (at V high)

M low (at V low)

Operating polarity

Beam quality & MU

PDD(10)_x (%)

MU delivered

Baseline cGy/MU optional

Lead foil used for PDD(10)_x

Notes (optional)

Back to Annual QA

TG-51 chamber data ships UNVALIDATED. Spot-check this run's cGy/MU against your trusted method (RadCalc / spreadsheet / manual) to within 0.5% before clinical use. Calc engine reused verbatim from the native Radiant QuikQA app.