RPR-05

Tissue-weighted organ dose

E_T = H_T wT. One organ's share of effective dose.

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QuantitiesICRP 103 wT

Governing equation

E_T=H_T w_T

$H_T \in \left[0.01, 200\right]$

where

H_T: Organ equivalent dose (mSv)
w_T: Tissue weighting wT (—)
E_T: Contribution to E (mSv)

The figure, part by part

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①

Governing law — red

E_T=H_T w_T

$H_T \in \left[0.01, 200\right]$

$H_T = 0.01$ $E_T = 0.001$

Along the curve

②

Domain of the variable — blue

H_T_{\min} = 0.01,\quad H_T_{\max} = 200

$H_T \in \left[0.01, 200\right]$

$H_T = 0.01$ $H_T = 0.01$

Along the curve

③

Response curve — green

E_T=H_T w_T

$H_T \in \left[0.01, 200\right]$

$H_T = 0.01$ $E_T = 0.001$

Along the curve

④

Rate of change — amber

\frac{\mathrm{d}E_T}{\mathrm{d}H_T}

$H_T \in \left[0.01, 200\right]$

$H_T = 1.268$ $E_T^{\prime} = 0.12$

Along the curve

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-05 — Tissue-weighted organ dose) is the form associated with ICRP 103 wT. Working symbols: $H_T$ , $w_T$ $\rightarrow$ $E_T$ . ICRP 103: bone marrow, colon, lung, stomach, breast are 0.12. Gonads 0.08. Remainder 0.12 split over 13 tissues.

Purpose

Purpose: compute

E_T

from

H_T

w_T

in Radiation protection via

E_T=H_T w_T

E_T = H_T wT. One organ's share of effective 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

H_T = 10.000\,\mathrm{mSv}

w_T = 0.120\,\mathrm{—}

, the governing relation

E_T=H_T w_T

yields

E_T = 1.200\,\mathrm{mSv}

. An organ, a weighting chip, a slice of E. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

Organ equivalent dose H_T10 mSvTissue weighting wT w_T0.12 —

Outputs

Contribution to E E_T1.200 mSv

Reading speed

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Narration of this film

An organ, a weighting chip, a slice of E.

ICRP 103: bone marrow, colon, lung, stomach, breast are 0.12. Gonads 0.08. Remainder 0.12 split over 13 tissues.

Reading speed

Watch on YouTube