| 1. |
- Andersson, Martin, et al.
(författare)
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An upgrade of the internal dosimetry computer program IDAC
- 2012
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Ingår i: Medical Physics in the Baltic States. - : Kaunas University of Technology. - 1822-5721. ; , s. 120-123
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Konferensbidrag (refereegranskat)abstract
- A full update of the internal dosimetry computer program IDAC has been conducted. The new update is based on new and more accurate computational phantoms to calculate effective dose and absorbed dose to organs and tissues. The new ICRP Adult Reference Computational Phantoms has been adopted as well as the latest of the ICRP standardized biokinetic models. The updated computer program includes a user-friendly graphical user interface.
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| 2. |
- Bernhardsson, Christian, et al.
(författare)
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Advancements in prospective dosimetry with NaCl read-out by optically stimulated luminescence
- 2017
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Ingår i: Medical Physics in the Baltic States : Proceedings of the 13th International Conference on Medical Physics - Proceedings of the 13th International Conference on Medical Physics. - 1822-5721. ; , s. 26-29
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Konferensbidrag (refereegranskat)abstract
- In this paper we present the recent improvements for optically stimulated luminescence dosimetry using ordinary salt (NaCl). It is shown that the dosimetric properties of NaCl may be improved by compressing the salt grains to solid pellets. With a linear dose response in, at least, the region <100 mGy, a zero background signal (when pre-bleached) and a minimum measurable dose of 10-20 μGy and high reproducibility, this opens for new applications of prospective OSL dosimetry with NaCl.
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| 3. |
- Bernhardsson, Christian, et al.
(författare)
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Assessment of effective dose to an individual carrying materials useful for radiation dosimetry by optically stimulated luminescence
- 2015
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Ingår i: Medical Physics in the Baltic States : Proceedings of the 12th International Conference on Medical Physics - Proceedings of the 12th International Conference on Medical Physics. - 1822-5721. ; , s. 48-51
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Konferensbidrag (refereegranskat)abstract
- Optically stimulated luminescence (OSL) from ordinary household salt has proven high potential for very low dose retrospective dosimetry. In the present paper other common place materials are considered and their dosimetric OSL-properties compared with household salt. The potential for assessment of the effective dose to an individual carrying such materials is investigated.
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| 4. |
- Bernhardsson, Christian, et al.
(författare)
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Environmental radiation baseline around the Belarusian nuclear power plant – assessments in Belarus and Lithuania
- 2023
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Ingår i: Medical Physics in the Baltic States : Proceedings of the 16<sup>th</sup> International Conference on Medical Physics - Proceedings of the 16<sup>th</sup> International Conference on Medical Physics. - 1822-5721. ; , s. 121-125
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Konferensbidrag (refereegranskat)abstract
- Prior to the operation of the first Belarussian nuclear power plant (BelNPP), the baseline of the radiation environment was determined within a radius of about 30 km from BelNPP. This independent assessment was carried out during two expeditions in 2019. In 2022, a similar survey was carried out (during the initialoperation of BelNPP) on the Lithuanian side of the boarder. Here we present the overall project and some general results of the baseline assessments.
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| 5. |
- Bernhardsson, Christian, et al.
(författare)
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Household salt (NaCl) for optically stimulated luminescence dosimetry: an overview
- 2021
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Ingår i: Medical Physics in the Baltic States : Proceedings of the 15th International Conference on Medical Physics - Proceedings of the 15th International Conference on Medical Physics. - 1822-5721. ; , s. 90-94
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Konferensbidrag (refereegranskat)abstract
- This brief overview of the use of household salt (NaCl) in optically stimulated luminescence (OSL) dosimetry is focusing on the use of NaCl pellets. It is suggested that the most optimal use of household NaCl, in general prospective dosimetry, is to compress the salt grains to pellets and read the radiation induced signal using OSL rather than TL. A summary of the main OSL dosimetric properties is provided for two Swedish household salts, and compared to the OSL properties of 100 different salts from all over the world.
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| 6. |
- Bernhardsson, Christian, et al.
(författare)
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OSL in Household Salt (NaCl) for Environmental, Occupational and Medical Dosimetry
- 2009
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Ingår i: Medical Physics In The Baltic States: Proceedings Of The 7th International Conference On Medical Physics. - 1822-5721. ; , s. 65-68
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Konferensbidrag (refereegranskat)abstract
- The recent progress in our work to implement salt (NaCl) as a dosemeter is presented. Laboratory investigations have indicated a linear dose response from 1 mGy to about 100 mGy and detection limits down to 0.1 mGy. Investigations in the clinic comparing TL-dosimetry in LiF and OSL in NaCl have indicated a similar dose response for the two dosemeters at different photon energies. Field studies with stationary dosemeter kits containing TLDs (LiF) and NaCl suggests that salt is also a good candidate for environmental monitoring of radiation.
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| 7. |
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| 8. |
- Bernhardsson, Christian, et al.
(författare)
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Variation in gamma dose rate in different locations following the Chernobyl accident
- 2013
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Ingår i: Medical Physics in the Baltic States : Proceedings of the 11th International Conference on Medical Physics - Proceedings of the 11th International Conference on Medical Physics. - 1822-5721. ; , s. 127-130
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Konferensbidrag (refereegranskat)abstract
- Radionuclides from the Chernobyl accident were released and dispersed during a limited period of time, but under different weather conditions. As a result the radionuclides were unevenly distributed on the ground. During the years the initial deposition has been altered at some locations by different processes, but remains relatively unchanged in others. Here we report on the current inhomogeneous radionuclide distribution, on both large- and small scales (1 cm2 – 10ths of km2), which on average varies a factor of 4.
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| 9. |
- Chipiga, Larisa, et al.
(författare)
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Assesment of patient doses and possible approaches for implementation of optimization procedures in PET/CT examinations in the Russian Federation
- 2017
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Ingår i: Medical Physics in the Baltic States : Proceedings of the 13th International Conference on Medical Physics - Proceedings of the 13th International Conference on Medical Physics. - 1822-5721. ; , s. 36-40
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Konferensbidrag (refereegranskat)abstract
- A dose survey of positron emission tomography (PET) examinations was performed in 12 regions of the Russian Federation, where the effective dose values were assessed for the various types of PET examinations. The comparison to similar published data show that the patient doses in Russia are higher than in other countries. Low-dose CT protocols and justification of multiphase CT protocols should be considered for future optimization and radiation protection of patients.
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| 10. |
- Chipiga, Larisa, et al.
(författare)
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Comparison between measured and calculated equivalent doses in CT using anthropomorphic pediatric phantoms
- 2015
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Ingår i: Medical Physics in the Baltic States : Proceedings of the 12th International Conference on Medical Physics - Proceedings of the 12th International Conference on Medical Physics. - 1822-5721. ; , s. 96-99
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Konferensbidrag (refereegranskat)abstract
- Due to the significant increase in pediatric trunk computed tomography (CT) examinations, there is a need for a reliable approach of conducting effectivedose estimate for such procedures. The current study is based on two dosimetric anthropomorphic phantoms representing a 1-year and a 5-year old child. Effectiveand equivalent tissue doses from CT examinations of the trunk were determined by thermoluminescent dosimeters (TLDs) and the CT-Expo software. The results of the two investigated methods show good agreement.
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