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Detection of ionize radiation with Geiger-Müller tube
Dědina, Radim ; Macků, Jan (referee) ; Musil, Vladislav (advisor)
This work deals with problems related with detection and measuring of the ionisated radiation. First part of this work is devoted to theoretical problems of detection, particulary to measuring with Geiger Muller tubes. Second part of the work contains proposal of electronical circuit using Geiger Muller tube as well as description of results experimentally acquired while using the detector, which was manufactured according to the proposed scheme. On the basis of those results it appears that proposed apparatus can be used for significant indication range extension.
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Detection of ionize radiation with Geiger-Müller tube
Dědina, Radim ; Macků, Jan (referee) ; Musil, Vladislav (advisor)
This work deals with problems related with detection and measuring of the ionisated radiation. First part of this work is devoted to theoretical problems of detection, particulary to measuring with Geiger Muller tubes. Second part of the work contains proposal of electronical circuit using Geiger Muller tube as well as description of results experimentally acquired while using the detector, which was manufactured according to the proposed scheme. On the basis of those results it appears that proposed apparatus can be used for significant indication range extension.
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DIGITAL IMAGES PROCESSING IN RADIOGRAPHY
PILAŘ, Martin
This thesis is focused primarily on digital image processing and modern imaging modalities algorithms. An algorithm means a method for solving a problem or an instruction. In image processing an algorithm presents the process from data acquisition to the resulting image displayed on the monitor. Therefore, in the first part of the thesis a brief overview of principles of imaging modalities used in radiodiagnostics is given. Collected data have to be analyzed and modelled in a certain way. These modified data are then digitized and ready for further processing. The main objective of my paper was to explain, especially to radiology assistants, the basic operations and algorithms used in image processing that are commonly used. I also tried to prove that not only by changing scanning parameters, but also by changing any image parameters the test results may be affected. On the other hand the operating personnel may invalidate the examination and thus contribute to an imperfect diagnosis. Other sections of my thesis are focused on primary image processing and basic image operations. This information is followed by post-processing or secondary processing of visual information. An integral part of the image processing algorithm consists of hardware and software important for archiving and information transmission. A certain part of my paper is devoted to future trends in image processing. The whole theoretical part is based on practical experience and the results obtained by either creating a software algorithm or by measurement of a water phantom on CT, where the original hypothesis was defended by applying a filter. The results are supported by a graphic and image documentation.
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