TABLE 1

Radiation Dosimetry of ^99mTc-MDP Scintigraphy vs. ¹⁸F-Labeled NaF PET

Type of imaging	Adult (70 kg)	15-y-old child (55 kg)	10-y-old child (32 kg)	5-y-old child (19 kg)	1-y-old child (9.8 kg)
^99mTc-MDP^*
Administered activity (MBq)	518	407	237	141	73
Effective dose in mSv/MBq (mSv)	0.0057 (3.0)	0.0070 (2.8)	0.0110 (2.6)	0.0140 (2.0)	0.0270 (2.0)
Bladder wall in mGy/MBq (mGy)	0.048 (24.9)	0.060 (24.4)	0.088 (20.9)	0.073 (10.3)	0.130 (9.5)
Bone surfaces (mGy)	0.063 (32.6)	0.082 (33.4)	0.130 (30.8)	0.220 (31.0)	0.53 (38.7)
Red marrow (mGy)	0.0092 (4.8)	0.010 (4.1)	0.017 (4.0)	0.033 (4.7)	0.067 (4.9)
¹⁸F-labeled NaF^†
Administered activity (MBq)	148	116	68	40	21
Effective dose in mSv/MBq (mSv)	0.027 (4.0)	0.034 (3.9)	0.052 (3.5)	0.086 (3.4)	0.170 (3.6)
Bladder wall in mGy/MBq (mGy)	0.22 (32.6)	0.27 (31.3)	0.40 (27.2)	0.61 (24.4)	1.10 (23.1)
Bone surfaces in mGy/MBq (mGy)	0.040 (5.9)	0.050 (5.8)	0.079 (5.4)	0.130 (5.2)	0.300 (6.3)
Red marrow in mGy/MBq (mGy)	0.040 (5.9)	0.053 (6.1)	0.088 (6.0)	0.180 (7.2)	0.380 (8.0)

↵* Derived from ICRP Report 80. Ann ICRP. 1999;28:75.
↵† Derived from ICRP Report 53. Ann ICRP. 1987;17:74.
Values in parentheses are doses in mGy (mSv for effective dose) for administered activity listed in table for that patient size.