This study, nuclear medicine techniques and the aim of this course is to examine the connection between the level of
Professional knowledge of physicions and levels of depression. The data is applied in the province of İstanbul, nuclear
medicine operator and technicions, based on volunteerism; the results of this study were obtained by applying the knowledge
form of nuclear medicine workers, Minessota job Satisfaction Scala, Beck Depression Scale, Intolerance to Uncertainty
Scale and Demografhic İnformation Form, the relationship between the lack of knowledge and uncertainty, the relationship
between uncertainty and stress and depression, a significant negative correlation was found between the levels of depression
and Professional knowledge of nuclear medicine operator and technicions. The activities and activitities of non-govermental
organizations and professionalorganizations operating in our country to increase their Professional knowledge level and to
respond with the most current from are important for increasing the quality of life of medical radiation employees quality of
life of medical radiation employees.

The main purpose of this study, the aim of this course is to evaluate the professional knowledge level of radiotherapy technicians
and the effect of working conditions on depression according to sociodemographic characteristics and to investigate whether
there is a relationship between them. The sample of the study consists of radiotherapy technicians who work in hospitals
with a bed capacity of 50 and over in İstanbul and nursing program of Health Services Vocational High School Radiotherapy
Program. In the study, data was collected in 45 radiotherapy technicians; Beck Depression Scale, World Health Organization
Quality of Life Scale Short Form, Minnesota Job Satisfaction Scale and Radiotherapy Technician’s Occupational Knowledge
Level and sociodemographic characteristics of radiotherapy technician. The level of professional knowledge of radiotherapy
technicians with low depression scores was found to be significantly higher. There was a statistically significant difference
between the quality of life quality and physical field scores of the technicians who has administrative duty and their nonadministrative
technicians. Data show that the level of depression decreases as professional knowledge in radiotherapy
technicians, and there is a difference between future anxiety and quality of life scores. Increasing the level of professional
knowledge in healthy institutions, quality and job satisfaction, as well as causing the stress of work is important to eliminate
the stress of work.

This study aimed to investigate the radiation attenuation properties of seven brain regions namely Frontal, Occipital, Parietal, Temporal cortexes, Hippocampus, Thalamus and Cerebellum in terms of their elemental compositions. Monte Carlo N-Particle Transport Code System-extended (MCNPX) version 2.6.0 (Los Alamos National Lab, USA) general purpose Monte Carlo code has been employed in order to calculate the mass attenuation coefficients of those aforementioned brain regions. A satisfactory agreement has been obtained on the mass attenuation coefficients (µ/ρ) calculated by MCNPX and XCOM for those brain regions under investigation. The results underlined that Cerebellum has the highest mass attenuation coefficients in terms of the radiological energy values. This can be explained by the elemental mass fraction value of Chlorine (Cl) in Cerebellum. It could be deduced that the intensity of diagnostic radiation can be more attenuated in Cerebellum than rest of the brain regions during the brain CT or brain PET examinations. The data from the present paper would be useful for the use of standard simulation geometry and mass attenuation coefficients for medical physics as well as the applications of radiation physics.