Table 5-5. Dosimetric Target Organs.

DOE-HDBK-1184-2004

Table 5-5. Dosimetric Target Organs.

Adrenals

kidneys

muscle

UB wall

liver

ovaries

ET1bas

pancreas

brain

ET2bas

breasts

LNet

skin

S wall

BBbas

spleen

SI wall

BBsec

testes

ULI wall

bbsec

thymus

LLI wall

thyroid

LNth

uterus

In this table "bas" refers to basal cells, "sec" to secretory cells, "UB" to urinary

bladder, and BS to bone surface.

The specific effective energy (SEE) describes the dose delivered to a specific target

organ T for each decay in a specific source organ S. The SEE are calculated with

the computer code SEECAL10. The SEE calculated with SEECAL do not account

for self absorption of the tritium beta radiation in the tritide particle. If corrections for

self absorption are made, care should be taken not to adjust the dose received from

HTO. The dose HT to target organ T from the decays in source organ S is given by

H T = U S SEE(T ← S )

(Eq. 5-5)

The total dose to the target organ is the sum of the dose from all source organs.

H T = ∑ U Si SEE(T ← S i )

(Eq. 5-6)

The doses to some target organs are combined in a prescribed fashion to calculate

the dose to an organ composed of two or more other organs or tissues. For

example, 57% of the dose to the upper large intestine is added to 43% of the dose

to the lower large intestine to give the dose to the colon. The tissues of the

respiratory tract are another example of this procedure. Two organs in Table 5-3

deserve special note. First, the dose to the thymus is assumed to be the same as

the dose to the esophagus. Second, the dose to the remainder is the mass

weighted mean of the doses to the i organs not listed in Table 5-3.

∑H m

(Eq. 5-7)

H remainder

∑m

M. Cristy and K. F. Eckerman, "SEECAL: Program to Calculate Age-Dependent Specific Effective Energies,"

ORNL/TM-12351 (1993).