PERBANDINGAN DOSIS RADIASI HAMBUR PADA THYROID DENGAN PEMERIKSAAN MULTI SLICE COMPUTED TOMOGRAPHY ABDOMEN DENGAN SHIELDING THYROID 0,50 MM DAN TANPA SHIELDING THYROID
Background. CT scan was contributed to the largest X-ray radiation in radiology departement. It will increase with the improvement use of MSCT Abdomen examination. The radiation will spout to the abdomen as a primary radiation and surrounding organs as a secondary radiation. One of the affected orga...
Saved in:
| Main Author: | |
|---|---|
| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2015
|
| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/134763/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=77859 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Universitas Gadjah Mada |
| Summary: | Background. CT scan was contributed to the largest X-ray radiation in radiology departement. It will increase with the improvement use of MSCT Abdomen examination. The radiation will spout to the abdomen as a primary radiation and surrounding organs as a secondary radiation. One of the affected organ is the thyroid. Radiation in the thyroid should not exceed the prescribed standards . Radiation dose can be reduced by using of 0,5 mm thyroid shielding. The aims of this study is to determine the scattered radiation dose which received by the thyroid at MSCT Abdomen examination and decrease the radiation dose by using of 0,5 mm thyroid shielding. Abstract
Materials and Methods. The study was conducted on patients who underwent MSCT Abdomen without and with contrast medium administration proper to the request of the clinician. Examination was used a MSCT Abdomen 64 slice. Radiation measurements are performed twice with the TLD. The first measurement is to determine the dose of radiation without the use of shielding. TLD is placed on the surface of the thyroid without shielding when patients underwent MSCT Abdomen without contrast medium administration. The second measurement is to determine the radiation dose with thyroid shielding, TLD placed on the surface of the thyroid and below to the thyroid shielding, while patients undergoing MSCT Abdomen with contrast medium administration.
Results and Discussion. There was a diferrence scattered radiation dose in thyroid at MSCT Abdomen examination between using of thyroid shielding and without thyroid shielding 0,5 mm. The average of scattered radiation dose which received by thyroid at the MSCT Abdomen examination was 0,7153 mGy. It was larger then standard dose that determined by Shrimpton et al. (0,05 mGy). Usage of 0.5mm thyroid shielding can reduce the radiation dose up to 36,78% (0,7153 mGy became 0,4522 mGy). Its value is smaller than the specified standards, namely 58%. Height, neck circumference, scan time and scan length was not correlated with the magnitude of the scattering of radiation dose reduction in thyroid.
Conclusion. Usage of 0.5 mm thyroid shielding can reduce the scattered radiation dose unless it still below standart dose effectiveness. |
|---|