Nataša Đinđić

Predicting the Biological Effects of Mobile Phone Radiation Absorbed Energy Linked to the MRI-obtained Structure

The nature of an electromagnetic field is not the same outside and inside a biological subject. Numerical bioelectromagnetic simulation methods for penetrating electromagnetic fields facilitate the calculation of field components in biological entities. Calculating energy absorbed from known sources, such as mobile phones when placed near the head, is a prerequisite for studying the biological influence of an electromagnetic field. Such research requires approximate anatomical models which are used to calculate the field components and absorbed energy. In order to explore the biological effects in organs and tissues, it is necessary to establish a relationship between an analogous anatomical model and the real structure. We propose a new approach in exploring biological effects through combining two different techniques: 1) numerical electromagnetic simulation, which is used to calculate the field components in a similar anatomical model and 2) Magnetic Resonance Imaging (MRI), which is used to accurately locate sites with increased absorption. By overlapping images obtained by both methods, we can precisely locate the spots with maximum absorption effects. This way, we can detect the site where the most pronounced biological effects are to be expected. This novel approach successfully overcomes the standard limitations of working with analogous anatomical models.

OCCUPATIONAL DISEASES INDUCED BY VIBRATIONS

Vibration is physical noxiousness which is present in different branches of industry. Vibration disease is the disease caused by professional vibrations. The disorders caused by acute and chronic, local or general exposure are numerous and very nonspecific. Vibration disease signs are expressed late during natural course of disease, and diagnosis is made with significant delay. The occupational disorders caused by vibration represents important segment in occupational medicine and occupational protection. Pathogenetic factors are microtrauma, spasm of arterial blood vessels and ischemia. The vibration damages all tissues but the cardiovascular, muscular, nervous system and bones are specially damaged. High frequent vibration damages cardiovascular system and low frequent vibration damages bones. Vibrations may represent contributing factor in development of occupational accidents. In the estimation of working ability the demands of workplaces, noxiousness, health state, functional state, motivation, length of working must be examined. The preventive steps include technical, organisational, and medical procedures as well as using of personal protective means. The vibrational disease has great impact on workers’ health and demand further research and permanent labor regulation adjustment in this field.