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Sources and interactions of ionizing radiation in nuclear medicine for radiology assistants
PRCHALOVÁ, Anna
Currently, there is not available educational text on the subject of sources and interactions of ionizing radiation in nuclear medicine that would be adequate to the physics knowledge of students in the field of Radiologic Assistant and other related disciplines. In this thesis, there was an attempt to create a comprehensive educational text on the basis of the application of curricular process theory, which discusses the radionuclide diagnostics and therapy for radiologic assistants and other related disciplines on the basis of an analysis of the current state of scientific knowledge in the examined area. The chosen topic is described in the theoretical part of this thesis and it was adjusted for the selected group of respondents in a form of the educational text. The intelligibility of educational text was verified by the statistic research using a questionnaire survey that respects the educational text and it was presented to the students in the field of Radiological Assistant.
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Technical bases of thermography for radiologists.
SOSNA, Filip
The bachelor thesis solved the technical fundamentals of thermography using the curriculum process. The bachelor thesis has investigated the problem in the following way: Goal 1: Perform a system analysis of the technical bases of thermography and adapt the results to the capabilities of radiological assistants - Goal 1 was accomplished by performing a system analysis of the structural levels of the technical bases of thermography. Goal 2: Perform a comparative analysis of the technical bases of thermography abroad and in the Czech Republic - Goal 2 was met by comparison between America, Asia and Europe and the Czech Republic (with an unsuccessful result for the Czech Republic). Goal 3: To transform the results of system analysis, adapted to the needs and possibilities of future radiological assistants, into educational form - goal 3 was fulfilled on the basis of selected educational theory and its application. Goal 4: Choosing a suitable educational theory to convey knowledge about the technical bases of thermography to radiological assistants - Goal 4 was accomplished by selecting the theory of the curricular process. Hypothesis H1: Educational form of the technical basics of thermography for the examined group of recipients can be created by applying the theory of curricular process - Successful implication of individual variant forms of the curriculum on the research field of technical basics of thermography enabled the hypothesis H1. Hypothesis H2: Knowledge of the recipients of education in the field of technical basics of thermography will have a Gaussian distribution close to the implemented distribution curriculum - Successful application of selected types of theoretical distributions (exponential distribution, normal distribution) to the result of the educational test. The theoretical benefits of the thesis include the design of structural levels of the system of technical basics of thermography. The practical benefits of this thesis include, for example, creating an educational text and a test for the technical basics of thermography. Based on the achieved results, it is also possible to propose follow-up work - eg exploring the possibilities of increasing the use of thermographic imaging methods in the Czech Republic.
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Physical bases of thermography for radiotherapists
LÁVIČKA, Šimon
There is currently no educational material for radiological assistants and students in this field to discuss the physical foundations of thermography. In particular, material which is appropriate to the presumed physical and mathematical knowledge required for the field of Radiologic Assistant and other related disciplines. Especially due to the fact that part of the scientific community sees in thermography a promising method for mammologii, rheumatology, orthopedics, angiology and dentistry. This motivation led to the elaboration of this bachelor thesis which set out these following goals: The selection of theory of knowledge transfer to the level of "Radiological Asssistant" and other related fields. The creation of an educational text that respects the chosen theory and reflects the blackbody radiation laws. The monitoring of current state of thermography knowledge in the addressees. There were two hypotheses formulated on the basis of an analysis of the current state and the setting of objectives: The application of theory to the curriculum process can create important components of a project curriculum for a given group of learners. The knowledge of the learners will have a theoretical distribution of the near- normal distribution in the area of physical fundamentals of thermography. As a convenient theory for transferring knowledge from science to the educational sphere has been proved to be the theory of the curricular process. Its applicability was accepted by the international scientific community as well see the impacted publication (Záškodný, 2012). Firstly, it was necessary to remind a generally known relationship of infrared radiation to thermography and than analyze the discovered theoretical physical backgrounds up to date, the most important for thermography also in relation to the radiation of the blackbody. There are also shown and described subsequent physical laws: Stefan-Boltzmann law, Wien displacement law, Rayleigh-Jeansons law and Planck´s radiation law, whereby it is especially necessary to emphasize the relationship of these laws to blackbody radiation whose temperature is between 0 K or -273,15 through the explanation of the emissivity parameter, which is a dimensionless quantity determining the heat emission capability. Its value must be entered in the thermal camera. Subsequently, a knowledge test was created on eighteen questions with a selection of four options, where only one was correct. Twenty-five radiological assistants active in their field at the age of twenty-three to fifty-three, with a length of practice from half a year to thirty-one years, were addressed. The methods of descriptive and mathematical statistics were used in the quantification of the addressees´ knowledge. All twenty-five tests were processed this way. Performing nonparametric testing of the empirical distribution of the scores obtained from these tests revealed that the second of the hypotheses set was not confirmed. The knowledge of the addressees was higher than the hypothetical assumption.
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Influence of the contrast medium iodine concentration on quality of the CT examination
RANŠOVÁ, Pavlína
Our work focused on determining absolute and relative density of various contrast agents in relation to iodine contents using in vitro and in vivo methods. It was documented that the relative density of contrast agents increases with the decreasing contents of iodine, i.e. density absolute values vary inversely as iodine content in these substances. Four various agents, bearing commercial names Visipaque 270, Visipaque 320, Ultravist 370 and Iomeron 400, in their original glass packing were used for our in vitro measurements. The measurements were carried out using CT equipment Emotion Duo (Siemens, Forchheim, Germany). Individual packing of the contrast agents were scanned by means of a standard protocol and under standard conditions. The obtained data were entered into tables. A retrospectively selected array of patients with standard scan of their stomachs was used for our in vivo measurements with a defined standard protocol using the same CT equipment and pressure injector CT 9000 Advantage (Liebel-Flarsheim, Mallinckrodt, the U.S.A.). The following data from 258 patients were recorded: age, sex, blood density after administering contrast agent in vitro on the level of diaphragm hiatus and on the bifurcation level, AP dimension of the patients on the hiatus level. Mean densities of the individual kinds of contrast agents were compared and a good correlation with the in vitro measurements was found out. The measured values were then analysed. The interdependence was studied in the measured densities and age, density changes measured on the hiatus level and on the bifurcation level for the individual contrast agents. The interdependence of the blood density on the AP dimension of the patients was also studied due to its practical use and it was documented that there is a good correlation of the decreasing density with the AP dimension as a simple parameter used instead of finding out patients{\crq} weights.
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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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The thoracic and lumbar spine injury - role of imaging modalities in diagnostic and therapy
DOLEŽALOVÁ, Martina
This article provides information about thoracic and lumbar spine injury with reflection to the role of radiologic assistants. Spine injury belongs to the most serious injuries and its incidence is rising. These injuries are diagnosed using imaging methods like plain X-ray, computed tomography and magnetic resonance imaging. Radiologic assistant himself is the person, who is responsible for the correct examination. If these injuries are treated surgically, radiologic assistant meets them at operating theatres too. Here the assistant manipulates with fluoroscopy machines and helps the operator with procedure navigation. Important is that the radiologic assistant should know all the steps of each procedure and should take care of radiation protection. If the procedure is done inadequately, the patient can be misdiagnosed and the radiation dose for him and for the staff may be increased. Since 1st January 2006 to 31st December 2006, 84 patients (48 women, 36 men) were hospitalised at the Neurosurgery departement of University Hospital Hradec Králové under diagnosis of thoracic or lumbar spine fracture. The age, frequency of vertebral fractures in thoracic and lumbar region and percentual use of various therapeutic methods are noted. But the most important aim of the study are imaging methods used in these patients and mistakes done during these examinations.
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