Author, Institution: Mantvydas Merkis, Kaunas University of Technology
Science area, field of science: Technological Sciences, Materials Engineering, T008
Research supervisor: Prof. Dr. Diana Adlienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Dissertation Defence Board of Materials Engineering Science Field:
Prof. Dr. Jolita Ostrauskaitė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) – chairperson
Prof. Dr. Hab. Arvaidas Galdikas (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Assoc. Prof. Dr. Valdas Girdauskas (Vytautas Magnus University, Natural Sciences, Physics, N 002)
Prof. Dr. Gunta Kizane (University of Latvia, Latvia, Natural Sciences, Physics, N002)
Assoc. Prof. Dr. Asta Tamulevičienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Dissertation defence meeting will be at Rectorate Hall of Kaunas University of Technology (K. Donelaičio 73-402, Kaunas)
The doctoral dissertation is available at the library of Kaunas University of Technology (Gedimino 50, Kaunas) and on the internet: M. Merkis el. dissertation.pdf
Annotation: Recent radiation therapy techniques are characterized by the use of steep dose gradients and high doses to increase treatment efficiency. Unfortunately, reliable experimental dosimetry methods for the verification of theoretically modeled patient treatment plans are not sufficient, since in most cases only point dose measurements are possible. Dosimetric gels are one of the most promising instruments that meet the needs of dosimetry in rapidly developing radiation technologies. Dosimetric gels are chemical dosimeters, therefore they can register the spatial dose distribution with high resolution, which depends on the method of “readout” of the dosimeter. In addition, dosimetric gels are equivalent to biological tissue in terms of absorption of ionizing radiation. However, the sensitivity of most of currently used dosimetric gels is not sufficient for wider clinical applications. The dissertation examines the possibilities of increasing the sensitivity of dosimetric gels using various additives: nanoparticles, solvents, inorganic salt. The reliability of the result obtained using improved dosimetric gels and the suitability of the gels for recording doses (dose response to radiation) were assessed taking into account the type of radiation, dose rate, and sensitivity of the readout method. Also, the tissue equivalence of dosimetric gels in terms of ionizing radiation absorption, polymerization dynamics, and the integrity of the recorded dose distribution were studied.
June 18 d. 11:00
Rectorate Hall at Kaunas University of Technology (K. Donelaičio 73-402, Kaunas)
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