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GPU Implementation of Resampling Antialiasing
Svoboda, Ondřej ; Lysek, Tomáš (referee) ; Starka, Tomáš (advisor)
The aim of this thesis is the implementation of resampling antialiasing for OpenGL. This thesis is based on already existing solution for DirectX. We are introducing several antialiasing methods used in todays graphical aplications. Next we are describing application implementation with differences against the original solution. Our implementation of resampling antialiasing was compared with other antialiasing methods and with the original solution. Image quality and performace were evaluated.
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Testing of SKPOS services
Butkovská, Simona ; Nosek, Jakub (referee) ; Machotka, Radovan (advisor)
Geodetic and Cartographic Institute Bratislava (GKÚ) has been providing the Slovak real-time positioning service (SKPOS) since 2006 as a multifunctional tool for precise real-time positioning of objects and phenomena using GNSS. SKPOS offers three basic positioning services, that can be used in real-time or for postprocessing. The work is dedicated to testing the two most frequently used services, the centimeter and millimeter. To test the SKPOS_cm centimeter service, three test measurements were performed on selected SKPOS mountpoints. The centimeter service currently uses exclusively the concept of a virtual reference station, while GKÚ was interested in expanding the service to include the concept of the so-called “nearest reference station”. For that reason, in 2022 GKÚ decided to perform the first test measurements also in the new concept in order to consider its possible future implementation within SKPOS services. In addition to the centimeter service, the SKPOS_mm millimeter service was also tested, which consists in postprocessing. The work is dedicated to SKPOS, the description of the performed test measurements, the analysis and evaluation of the achieved results.
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GPU Implementation of Resampling Antialiasing
Svoboda, Ondřej ; Lysek, Tomáš (referee) ; Starka, Tomáš (advisor)
The aim of this thesis is the implementation of resampling antialiasing for OpenGL. This thesis is based on already existing solution for DirectX. We are introducing several antialiasing methods used in todays graphical aplications. Next we are describing application implementation with differences against the original solution. Our implementation of resampling antialiasing was compared with other antialiasing methods and with the original solution. Image quality and performace were evaluated.
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Computed tomography of the intestinal tract, usage, advantages and disadvantages of this metod
SMOLÁKOVÁ, Eva
In presented essay author tries to offer comprehensive overview of possibilities of computer tomography (CT) in examination of the intestinal tract at her radiologic department. Introduction of Multidetector CT represents outstanding advance in spatial resolution in z - axis and accelerated data acquisition wihout increase of radiation dose. All these advantages of Multidetector CT project strongly onto examination of the intestines. At author´s department CT enterography and CT colonography replaced to the background classic methods as irrigoscopy and enteroclysis. The feasibility of assessment of the intestinal tract and other abdominal organs at the same time is the most significant contribution of this method. At our department we note progressive decrease of number of enteroclysis examinations since the year 2003. Limitations of this method are radiation exposure, intravenous application of iodine contrast medium and impossibility to obtain specimens for histologic examination. We expect, that future technologies will reduce some of these disadvantages.
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Role of radiological assistant by angiografic procedures
EISNER, Tomáš
Angiography as an X - ray examination of blood vessels showed an expressive development since its creation. From translumbal puncture of the abdominal aorta up to more tender Seldinger technique it led to considerable decrease of occurrence of peripro-cedural complications. Angiographic interventions and involved materials, instrumenta-tion devices and image processing possibilities are expressively improving. Invasive an-giopraphic examinations are substituted by non-invasive interventions like ultrasonogra-phy, magnetic resonance or computer tomography. After all they remain integral part of examination algorithms, especially by vessels interventions. A common note of invasive procedures in Cath-lab - in addition to diagnostics also by an intravascular ultrasonography or by therapeutical procedures like percutaneous transluminal angioplasty, stent implantation, vessels embolisation, trombolysis and trombectomy and other {--} is using of fluoroscopy with ionizing radiation and intravascular application of a contrast medium. Radiologic assistant has its more and more unsubstitutable role by diagnostic im-aging of vessels. Radiologic assistant has to be familiar with course of single intervention and with sequence of doctor{\crq}s operations, in order to be able to fulfill his requirements in time and at the same time he has to understand possible risk of complication's and he has to know how to respond to them properly and in time. Further he must well manage an-giography device and all its parts and know postprocessing picture adjustment. Quality work of radiologic assistant should have fundamental influence on dose of ionizing radiation for patient and for examining staff and on consumption and risks of application of contrast medium. By my own experiences with assistance by 4 628 non-coronary and 14 620 coro-nary angiographic examinations in last 10 years (1997-2006) I found set of 40 patients who were examined by pulse and continual fluoroscopy during angiography of lower limbs arteries at Cardio angiographic department of Faculty hospital in Motol. Conclusions make out advantage of pulse fluoroscopy, of digital postprocessing of images iclusive of 3D imaging and they confirmed hypothesis of ionizing radiation{\crq}s dose and carload of contrast medium. By conclusions of this work I suggest to take care of new imaging technics by invasive digital angiography and insert these knowledges to system of lifelong learning of radiologic assistants.
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