Přístupnostní navigace
E-přihláška
Vyhledávání Vyhledat Zavřít
Detail předmětu
FEKT-MPAN-ZIZAk. rok: 2026/2027
This course is focused to using of ionizing radiation in medical imaging. First part of the course is dedicated to basics of atomic physics which are necessary for understanding of physical principles of X-ray and gamma rays. In the next part we focus to projection X-ray systems in different applications (projection skiagraphy, fluoroscopy, mammography, bone densitometry and dental X-rays). All construction aspects of X-rays systems are discussed - X-ray tube, principles of detection (film material, computing radiography, flat panels). The course continues with using of X-ray in computed tomography (CT) - definition of Radon's transform as basic concept of image reconstruction, constructional aspects of CT systems. Third part of this course is focused to medical imaging in nuclear medicine - planar scintigraphy, single photon emission computed tomography (SPECT), positron emission tomography (PET). The last part deals with hybrid imaging systems which combines two imaging modalities into single system. Also problematics of theranostics in clinical practice is introduced. Last part is dedicated to radiation biology and protection. Image quality and achievable parameters are discussed for all imaging systems.
Jazyk výuky
Počet kreditů
Garant předmětu
Zajišťuje ústav
Vstupní znalosti
Požadovány jsou základní znalosti v oblasti matematiky, fyziky a teorie zpracování signálů a obrazů na úrovni bakalářského studia.
Pravidla hodnocení a ukončení předmětu
Laboratory assignments and output of the computer labs are assessed during the semester and are awarded by maximum 30 points.The course concludes with an examination combining written and oral parts for reamining 70 points.Further information is contained in an updated course Statement which is issued before the start of the semester by the course supervisor.
Učební cíle
Cílem tohoto kurzu je rozšířit znalosti z bakalářského stupně v oblasti lékařské fyziky a zobrazovacích systémů (ZS). Tento kurz je zaměřen na využití ionizujícího záření v oblasti lékařského zobrazování. Postupně se zaměříme na klasické rentgenové (RTG) systémy, systémy výpočetní tomografie a ZS nukleární medicíny. V poslední části bude diskutována problematika radiační biologie a ochrany, a dále aktuální témata jako jsou hybridní systémy a teranostika.
Studijní opory
Základní literatura
Zařazení předmětu ve studijních plánech
specializace MPC-BIO_TECH , 2 ročník, zimní semestr, povinně volitelný
Přednáška
Vyučující / Lektor
Osnova
1. History of Medical Imaging - first look to different imaging modalities, basic physical principles related to development of imaging systems, quantitative and qualitative parameters of medical imaging, image quality assessment2. Physics of ionizing radiation - electromagnetic radiationy, atom and its models, electron transitions, characteristic radiation and Auger electron emission, nuclear stability, radioactivity, interactions of radiation with matter (all kinds), attenuation of radiation3. X-Ray Systems 1 - geometric acquisition, summated imaging, x-ray tube - basic principle, characteristic radiation, Bremsstrahlung, types of x-ray tubes, materials for anodes, X-Ray generators, filtration and collimation of the radiation, primary collimator4. X-Ray Systems 2 - scattered radiation, Bucky grid, anti-scatter grid, detection of X-Ray - photographic film, computed digital radiography (memory foils), flat panels with direct and indirect detection of radiation, specifications for fluoroscopy - image intensifier, different acquisition parameters5. X-Ray Systems 3 - nontypical applications - fluoroscopy, using of contrast agents, mammography, dental X-Ray, bone densitometry, dual energy acquisition, 3D digital tomosynthesis, image quality of X-Ray Systems6. CT systems 1 - tomographic systems, basic principles - parallel projections, image reconstruction, algebraic reconstruction, simple back projection, filtered back projection, iterative reconstructions, fan beam projections, helical data interpolation, multi-layer detectors interpolations, definition of CT number.7. CT systems 2- historical overview of CT systems and generations - first, second, third, slip ring technology, fourth and fifth generation, helical systems, sub-secund systems, multi-layer systems. X-Ray tubes for CT systems - differences to standard X-Ray tubes8. CT systems 3 - detection of radiation in CT - gas detectors, scintillators, technologies for production of multi-layer detectors. Acquisition parameters - anode voltage, anode current, helical pitch, binning. Technical perspective of CT system components - gantry, patient table and others. Image quality of CT systems9. Nuclear Medicine Imaging 1 - radionuclides as a source of ionizing radiation, gamma radiation, summation imaging - planar scintigraphy, Anger's camera, detection by semiconductors - Cadmium-Zinc-Telluride (CZT) detector10. Nuclear Medicine Imaging 2 - tomographic systems - single photon emission computed tomography (SPECT), positron emission tomography (PET) - definitions, projections, set of projections, image reconstructions, coincidence, time-of-flight detection and reconstructions, typical radiopharmaceuticals (technetium 99m, FDG, etc.)11. Hybrid Medical Imaging - construction, combination of selected imaging modalities - advantages, disadvantages, correction of attenuation, SPECT-CT, PET-CT, PET-MRI, unusual combinations for preclinical research. Theranostics - basic principle of method, clinical examples12. Radiation biology - dose, negative effects of ionizing radiation to tissue, limitations of radiation dose, simulations of radiation protection
Cvičení na počítači
1. Simulation of attenuation of x-ray with various energies, simulation of Compton scattering.2.Simulation of X-ray spectra - effect of various anode voltage, anode current and material filtration.3. Image reconstruction for computed tomography - sinogram, simple back projection, filtered back projection.4. Advanced method for image reconstruction - iterative approaches, SIRT, SART, etc.5. Principles of PET imaging - positron annihilation, two photons propagation and detection, sinogram estimation, time of flight (TOF).6. Pharmacokinetic modeling in PET data analysis - overview of models, design of own model, extraction of time intensity curves, analysis.
Exkurze
Excursion to a clinical facility working with imaging systems using ionizing radiation.
Laboratorní cvičení
1. Basics of X-ray imaging - image geometry, spatial resolution.2. Spectrum of X-ray tube - combination of characteristic radiation and bremsstrahlung.3. Computed tomography - acquisition of data, representation by sinogram, image reconstruction.4. Image detector properties - measuring of dark current noise characteristic, linearization of photons to image level conversion.5. Basic measurement with radioactive tracers - alpha, beta, gamma radioactivity, inverse square law.
Individuální příprava na cvičení
Individuální příprava na závěrečnou zkoušku