20.500.12556/RUL-149993 Modulacija tokovnih sunkov glede na anatomske strukture pri CT slikanju glave in prsnih organov diplomsko delo Modulation of electrical current surges according to anatomical structures in CT imaging of the head and the chest organs diploma work Uvod: CT glave in prsnih organov sta pogosti preiskavi, pri katerih očesne leče in dojke izpostavljamo ionizirajočemu sevanju, zato so tehnike za znižanje doze sevanja zelo pomembne. Eden izmed načinov zniževanja doze sevanja je tehnika modulacije tokovnih sunkov z dodatnim zniževanjem toka v področju očesnih leč in dojk (OBTCM). Toda pomembno je upoštevati kako OBTCM tehnike za znižanje doze vplivajo na kakovost slik. Namen: Namen diplomske naloge je prikazati kako OBTCM vpliva na dozno obremenitev pacienta pri CT slikanju glave in prsnih organov ter to prikazati tudi s praktičnimi primeri. Ob zniževanju doze sevanja smo želeli ugotoviti tudi, kako OBTCM vpliva na kakovost slik. Metode dela: Uporabili smo deskriptivno metodo zbiranja podatkov s pregledom literature. Vire smo zbirali na straneh Cobiss, DiKUL, Google Scholar, PubMed, Radiopedia, Science Direct, Springer Link. Rezultati: Za 53 CT preiskav glave z uporabo OBTCM in 53 preiskav s klasično modulacijo toka smo opazovali ekspozicijske parametre, DLP in CTDIvol in glede na vrednosti SNR in CNR opazovali kako se spreminja kakovost slik. Razprava in zaključek: Rezultati so pokazali, da je skupna doza sevanja višja pri OBTCM, doza na očesne leče in dojke pa je nižja. Kakovost CT slik je pri OBTCM primerljiva s CT slikami brez uporabe OBTCM. Introduction: CT scans of the head and chest organs are common examinations in which the lens of the eye and the breast are exposed to to ionizing radiation, so techniques to reduce the radiation dose are very important. One of the methods to reduce radiation dose is the current pulse modulation technique with additional current reduction in the eye lens and breast area (OBTCM). But it is important to consider how OBTCM dose reduction techniques affect image quality. Purpose: The aim of the diploma thesis is to show how OBTCM affects the dose load in the patient during CT imaging of the head and chest organs, and to demonstrate this also with practical examples. While reducing the radiation dose, we also wanted to find out how OBTCM affects the quality of the images. Methods: We used a descriptive method of data collection with a literature review. We collected sources on the pages of Cobiss, DiKUL, Google Scholar, PubMed, Radiopedia, Science Direct, Springer Link. Results: For 53 CT examinations of the head using OBTCM and 53 examinations with classical current modulation, we observed the exposure parameters, DLP and CTDI, and observed how the quality of the images changes according to the SNR and CNR values. Discussion and conclusion: The results showed that the total radiation dose is higher in OBTCM, but dose to the eye lens and breast is lower. The quality of CT images with OBTCM is comparable to CT images without the use of OBTCM. diplomska dela radiološka tehnologija anatomska modulacija toka X-CARE OBTCM CT prsnega koša CT glave dozna obremenitev diploma theses radiologic technology anatomical tube current modulation X-CARE OBTCM chest CT head CT dose true false false [V. Korošec] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2023-09-13 07:45:42 2023-09-13 07:45:47 2023-09-15 03:14:34 0000-00-00 00:00:00 2023 0 Ljubljana 0 Ljubljana 53 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 616-07 127976 164392963 33701.pdf 33701.pdf 1 B15F5AF226F2591E74D39F89529FD4EC e55b27e6a737f8869068b420a39576cea5639d85603d87c3b139b837e1e70398 ca121301-51f8-11ee-916e-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=174525 Zdravstvena fakulteta 0 0 0