RPR-11

Weekly workload W

W = n D. Patients per week times isocentre dose.

Reading speed

Barrier designNCRP 151 W

Governing equation

W=nD

where

n: Patients per week (1/wk)
D: Dose per patient at iso (Gy)
W: Workload (Gy/wk)

Lecture brief

Historical brief

Inverse-square, half-value layer, ICRP weighting and ALARA are the protection craft since the 1920s commissions. The lab computes transmission, equivalent dose and a shielding snapshot. This sheet (RPR-11 — Weekly workload W) is the form associated with NCRP 151 W. Working symbols: $n$ , $D$ $\rightarrow$ $W$ . A busy linac is a few hundred Gy/week at isocentre. IMRT increases MU and can raise leakage workload more than primary W.

Purpose

Purpose: compute

W

from

n

D

in Radiation protection via

W=nD

W = n D. Patients per week times isocentre dose. Use it when a real radiation protection question must be answered in SI before a code check.

Live realistic example

In symbols

Live case. Given

n = 40.000\,\mathrm{1/wk}

D = 2.000\,\mathrm{Gy}

, the governing relation

W=nD

yields

W = 80.0\,\mathrm{Gy/wk}

. A diary of fractions stacking into weekly gray. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

Patients per week n40 1/wkDose per patient at iso D2 Gy

Outputs

Workload W80.0 Gy/wk

Reading speed

Watch on YouTube

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Narration of this film

A diary of fractions stacking into weekly gray.

A busy linac is a few hundred Gy/week at isocentre. IMRT increases MU and can raise leakage workload more than primary W.

Reading speed

Watch on YouTube