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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Simulation of dose distribution irradiation
 Večeřa, Petr ; Hlaváč, Martin (referee) ; Kolářová, Jana (advisor)
This project deals with the issue of simulation of dose irradiation. This principle is used in a radiotherapeutic device known as a Leksell Gamma Knife for the treatment of intracranial tumours. With regard to the theoretical observations obtained by studying this device, the project suggests the use of analytical geometry for the creation of a mathematical model for calculation of the intensity in the rayed area. A demonstration program Leksell_xvecer08 has been created for this model in a MatLab software background, which enables the user to change various input arguments and simulate a picture of the dosage spread in the target scanned areas.
Detailed record
Simulation of dose distribution irradiation
 Večeřa, Petr ; Hlaváč, Martin (referee) ; Kolářová, Jana (advisor)
This project deals with the issue of simulation of dose irradiation. This principle is used in a radiotherapeutic device known as a Leksell Gamma Knife for the treatment of intracranial tumours. With regard to the theoretical observations obtained by studying this device, the project suggests the use of analytical geometry for the creation of a mathematical model for calculation of the intensity in the rayed area. A demonstration program Leksell_xvecer08 has been created for this model in a MatLab software background, which enables the user to change various input arguments and simulate a picture of the dosage spread in the target scanned areas.
Detailed record
Rotational angiography
 JAŠAROVÁ, Eva
Digital Subtraction Angiography (DSA) is a special X-ray examination of the blood vessel system. Despite the development of other visual techniques it has not lost its importance so far. In the 1960s and 1970s it developed itself into the most detailed method of visualization of the blood-vessel system. DSA requires much more expensive device and equipment with tools than only ten years ago. The price is equal to the quality and amount of information. DSA further remains the invasive method. One or two-projection system for acquiring the complete picture of blood vessels is the most used technique of record in angiography. Common methodologies require two applications of the contrast medium for the same part of the body. Rotation angiography is a special modern technique for three-dimensional visualization of arteries. It is mainly used for visualization of neck or brain arteries. Its principle is in the application of the contrast medium into the artery, when the examined area is X-rayed and C-arm is continuously turned by 180°. The final angiography can be assessed that we turn the picture step by step. If we display the same area once more without the application of the contrast medium, we get a mask for DSA and both sequences we can subtract. Only one artery is displayed as well as during classic DSA.
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