Radiation Dose Estimates
for I-125 mIBG
| |
Estimated
Radiation Dose (mGy/MBq) |
| ORGAN |
mGy/MBq |
rad/mCi |
| |
|
|
| Adrenals |
4.2E-02 |
1.6E-01 |
| Brain |
1.4E-02 |
5.3E-02 |
| Breasts |
1.2E-02 |
4.5E-02 |
| Gallbladder Wall |
4.3E-02 |
1.6E-01 |
| LLI Wall |
1.7E-02 |
6.1E-02 |
| Small Intestine |
1.6E-02 |
5.9E-02 |
| Stomach |
1.7E-02 |
6.4E-02 |
| ULI Wall |
1.7E-02 |
6.2E-02 |
| Heart Wall |
8.3E-02 |
3.1E-01 |
| Kidneys |
2.0E-02 |
7.4E-02 |
| Liver |
2.2E-01 |
8.2E-01 |
| Lungs |
2.3E-02 |
8.3E-02 |
| Muscle |
1.6E-02 |
5.8E-02 |
| Ovaries |
1.6E-02 |
5.9E-02 |
| Pancreas |
2.6E-02 |
9.6E-02 |
| Red Marrow |
1.2E-02 |
4.4E-02 |
| Bone Surfaces |
3.1E-02 |
1.2E-01 |
| Salivary Glands |
7.0E-02 |
2.6E-01 |
| Skin |
1.1E-02 |
3.9E-02 |
| Spleen |
1.6E-01 |
5.9E-01 |
| Testes |
1.3E-02 |
4.8E-02 |
| Thymus |
1.5E-02 |
5.7E-02 |
| Thyroid |
4.6E-02 |
1.7E-01 |
| Urinary Bladder Wall |
1.4E-01 |
5.1E-01 |
| Uterus |
2.00E-02 |
7.50E-02 |
| |
|
|
| Effective Dose Equivalent |
5.1E-02 mSv/MBq |
1.9E-01 rem/mCi |
Based on data gathered in patients - Jacobsson et al, 4th
International
Radiopharmaceutical Dosimetry Symposium, CONF-851113, pp. 389-398.
Assumed distribution and retention:
Total body 63 % Tb = 32.8 hours 36 % Tb = 3.05 hours
1 % Tb = ñ
Liver 21 % Tb = 32.8 hours 15 % Tb = 3.05 hours
0.3 % Tb = ñ
Spleen 0.6 % Tb = 178 hours
Sal. glands 0.04 % Tb = 32.8 hours
Thyroid 0.005 % Tb = 168 hours
Adrenals 0.02 % Tb = 48.6 hours
Heart wall 0.8 % Tb = 120 hours
Dynamic Bladder Model used (4.80 hour void)
36 % Tb = 3.00 hours 63 % Tb = 33.6 hours
Dose to salivary glands is self-dose only, based on 77 g mass
and photon absorbed
fractions from MIRD Pamphlet No. 8. Salivary gland activity did
not contribute to other organ doses. Estimate calculated using
phantom of Cristy & Eckerman (Report ORNL/TM-8381/V1 &
V7)