Modernization of the X-Ray Tomographic Scanner Based on Gas-Discharge Linear Detector

In this paper, we describe the modernization of the tomographic scanner based on multi-channel linear gas-discharge detector. We have changed the principle of acquisition the projection data, which allowed to receive a bulk three-dimensional tomographic data instead of single slices of the studied samples. Modified scanner has shown increasing contrast and spatial resolution of single slices. The volume of interest in studied objects has been significantly increased and are as high as 25 000 cubic cm, which is determined by 1536 pixels in high

The Dosimetric Parameters Investigation of the Pulsed X-ray and Gamma Radiation Sources

The most common type of radiation used for diagnostic purposes are X-rays. However, X-rays methods have limitations related to the radiation dose for the biological objects. It is known that the use of the pulsed emitting source synchronized with the detection equipment for internal density visualization of objects significant reduces the radiation dose to the object. In the article the analysis of the suitability of the different dosimetric equipment for the radiation dose estimation of the pulsed emitting sources is carried out. The approbation results on the pulsed X-ray generator RAP-160-5 of the dosimetry systems workability with the pulse radiation and its operation range are presented. The results of the dose field investigation of the portable betatron OB-4 are demonstrated. The depth dose distribution in the air, lead and water of the pulsed bremsstrahlung generated by betatron are shown

Numerical Simulation of the Medical Linear Accelerator Electron Beams Absorption by ABS-Plastic doped with Metal

In this paper the numerical simulation results of the dose spatial distribution of the medical electron beams in ABS-plastic doped with different concentrations of lead and zinc are shown. The dependences of the test material density on the lead and zinc mass concentrations are illustrated. The depth dose distributions of the medical electron beams in the modified ABS-plastic for three energies 6 MeV, 12 MeV and 20 MeV are tested. The electron beam shapes in the transverse plane in ABS-plastic doped with different concentrations of lead and zinc are presented

Measurement Technique of Dose Rate Distribution of Ionization Sources with Unstable in Time Beam Parameters

The article describes a new technique for the average values of radiation dose measurement for the unstable gamma-ray sources which are used in non-destructive testing. The method is based on usage of different types of compact accumulative dosimeters. Spatially distributed position sensitive dosimetry system based on compact sensitive elements was created. Size and spatial resolution of the system of the dosimetry system are chosen taking into account sources characteristics. The proposed method has been tested on the measurement of dose distribution of several sources of X-ray and gamma-radiation based on X-ray tubes, electronic accelerator betatrons and linear electron accelerators

The X-ray Beam Passage through the Collimator Made of Different Materials: Numerical Simulation

The X-ray beam application grows in the research investigations, in the medical diagnosis and treatment, in the industry. In this paper the theoretical model of the actual pulsed X-ray generator RAP-160-5 beam developed in the program "Computer Laboratory (PCLab)" is shown. The simulation data of the X-ray beam profile and shape collimated by different materials (gypsum, corund-zirconia ceramic, lead) are illustrated

Formation of electron beam fields with 3D printed filters

In this research the electron beam traverse profiles beam before and after the application of the developed filter element was calculated and experimentally obtained. The article presents the calculated parameters of the unit form and geometrical dimension, forming the determined electron beam profile, and the physical configuration of the filter produced by 3D print method. The electron beam field distributions before and after filtration obtained with the help of GAFCHROMIC EBT2 radiographic films are illustrated. The calculation method of the filter actual density determination is presented. In the paper the comparison results of the electron beam experimental and calculated profiles are shown

The application of computed tomography and magnetic resonance imaging at diagnostics of the human maxillofacial system

The application of computed tomography and magnetic resonance imaging has entered into wide practice at diagnosis of the maxillofacial system. Computed tomography allows us to obtain information about only bone structures. Magnetic resonance imaging gives information about bone and soft tissue structures of the maxillofacial system. The sagittal and coronal projections should make for complete diagnosis of the temporomandibular joint, because the articular disc is very mobile structure. We suggest that the temporomandibular joint can influences the internal carotid artery at medial displacement of the articular disc. As a result of analysis of the literature and our own studies concluded that changes TMJ affect the internal carotid artery

Comparison of the calculated and experimental dataof the extracted electron beam profile

The current commercial use of electron accelerators grows in research, industry,medical diagnosis and treatment. Due to this fact, the creation of a model describing theelectron beam profile and shape is an actual task. The model of the TPU microtron extractedelectron beam created in the program "Computer Laboratory (PCLab)" is described andcompared with experimental results in this article. The value of the internal electron beamdivergence determination is illustrated. The experimental data of the electron beam profilesat the selected distances from the output window are analysed and compared with thesimulation data. The simulation data of the electron beam profiles are shown

Numerical Simulation of the Microtron Electron Beam Absorption by the Modified ABS-Plastic

Each specific task of the electron beam application imposes requirements for the beam profile and shape. One of the methods allows achieving high accuracy and low cost of the filters production is the 3D print method. The required properties of the electron beam interaction with the material can be achieved by using the modified plastic filaments. In this paper, the results of the model creation of the electron beams interaction with the ABS-plastic doped with different concentrations are presented. The depth dose distributions of the electron beam in the modified ABS-plastic are sown. The electron beam profiles and the electron beam distribution in the modified ABS-plastic are illustrated