Table 2. Estimated percentage of tissue irradiated and thermoluminescent dosimeter (TLD) used to calculate mean absorbed dose to a tissue or organ.

	Fraction irradiated (%)	TLD ID (see Figure 1)
Bone marrow	16.5
Mandible	1.3	13, 14, 17, 18
Calvaria	11.8	1, 2, 3
Cervical spine	3.4	15
Thyroid	100	22, 23
Oesophagus	10	24
Skin	5	8, 9, 10, 16
Bone surfacea	16.5
Mandible	1.3	13, 14, 17, 18
Calvaria	11.8	1, 2, 3
Cervical spine	3.4	15
Salivary Glands	100
Parotid	100	11, 12
Submandibular	100	19, 20
Sub-lingual	100	21
Brainb	100	4, 5
Remainder
Brainc	100	4, 5
Lymphatic nodesb	5	11–15, 17–22, 24
Muscleb,c	5	11–15, 17–22, 24
Extrathoracic airwayb	100	6, 7, 11–15, 17–22, 24
Oral mucosab	100	11–14, 17–21

^aBone surface dose is the bone marrow dose multiplied by the bone:muscle mass energy absorption coefficient ratio, which is equal to: (−0.0618 × ²/₃ kV peak) + 6.9406 using data taken from NBS (National Bureau of Standards) Handbook No. 85¹¹

^b2007 recommendations of the ICRP⁴

^c1990 recommendations of the ICRP¹³