Congress:
EuroSafe Imaging 2020
Keywords:
Action 7 - Radiation protection of children, Nuclear medicine, Paediatric, Radioprotection / Radiation dose, SPECT, Diagnostic procedure, Dosimetric comparison, Not applicable, Diagnostic or prognostic study, Performed at one institution
Authors:
F. Coppe , L. Santos , J. C. Hermida , O. Alonso
DOI:
10.26044/esi2020/ESI-08375
Conclusion and recommendations
RESULTS
Age
(Y)
|
Weight
(kg)
|
Activity
(MBq)
|
Effective
Dose(mSv)
|
Absorbed
Dose(mGy)
|
6
|
20 |
925 |
11 |
109.1 |
13 |
62 |
740 |
4.3 |
45.3 |
12 |
42 |
629 |
3.6 |
38.5 |
13 |
46 |
555 |
3.2 |
34 |
16 |
32 |
555 |
3.2 |
34 |
8 |
20 |
518 |
4.5 |
46.3 |
8 |
12 |
444 |
3.8 |
39.6 |
14 |
45 |
444 |
2.6 |
27.2 |
11 |
25 |
407 |
3.5 |
36.3 |
3 |
16 |
222 |
2.8 |
26.2 |
0.4 |
5.5 |
148 |
3.3 |
23.4 |
Table 2. Radiopharmaceutical administered: 99mTc-MDP.
Activities calculated without EANM cards. Estimation of Effective dose(E) to the whole body and Absorbed dose(D) to the bladder walls.
Age(Y) |
Weight(kg) |
Activity(MBq) |
E (mSv) |
D(mGy) |
15 |
55 |
420 |
2.4 |
25.7 |
14 |
54 |
395 |
2.3 |
24.2 |
12 |
50 |
375 |
2.2 |
22.9 |
10 |
32 |
246 |
2.1 |
22 |
8 |
30 |
240 |
2.1 |
21.4 |
11 |
26 |
215 |
1.9 |
19.2 |
6 |
21 |
185 |
2.4 |
21.8 |
8 |
22 |
185 |
1.6 |
16.5 |
3 |
16 |
140 |
1.8 |
16.5 |
1 |
12 |
110 |
2.5 |
17.4 |
0.8 |
8 |
75 |
1.7 |
11.8 |
0.25 |
4.45 |
60 |
1.3 |
9.5 |
Table 3. Radiopharmaceutical administered: 99mTc-MDP.
Activities calculated using EANM dosage cards. Estimation of Effective dose(E) to the whole body and Absorbed dose(D) to the bladder walls.
According to the three observers, images provided diagnostic information reducing radiation exposure of pediatric patients.
Comparing effective and absorbed doses calculated for the sample of selected patients, a decrease in both was observed.
CONCLUSION
The use of the card allowed the calculation of the activities for each patient according to the weight and the radiopharmaceutical administered. The result was lowering the activity without losing diagnostic information. When images were subjectively evaluated, there was a slight preference for lower activities images over the higher activities.
In the context of good practices in nuclear medicine, we recommend the use of the EANM dosage card.