Modules / Annual QA / TG-51 Electron

TG-51 Electron

TG-51 electron reference dosimetry (cylindrical chambers). 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 electron reference dosimetry (cylindrical chambers). Requires two raw readings — at d_ref and at d_ref + 0.5·r_cav — for the gradient correction, plus R₅₀.

Identity

Machine name

Physicist

Beam energy label

Nominal energy (MeV)

Measurement date

R₅₀ (cm)

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

Geometry & environment

SSD (cm)

Cone size (cm)

Temperature (°C)

Pressure (kPa)

Humidity (%) optional

Voltages & readings (nC)

Enter M+ and M− as signed raw readings, per TG-51. The two d_ref readings are magnitudes at the operating polarity.

V operating

V high

V low

M raw at d_ref

M raw at d_ref+0.5r_cav gradient

Operating polarity

M+ (positive polarity)

M− (negative polarity)

M high (at V high)

M low (at V low)

MU delivered

Baseline cGy/MU optional

Notes (optional)

Back to Annual QA

TG-51 electron chamber k_R50,ecal data ships UNVALIDATED. Spot-check this run's cGy/MU against your trusted method to within 0.5% before clinical use. Calc engine reused verbatim from the native Radiant QuikQA app.