Title Usporedba vrsta detektorskih ploča
Title (english) COMPARISON OF X-RAY DETECTOR PLATES
Author Josip Grgat
Mentor Tatjana Matijaš (mentor)
Committee member Frane Mihanović (predsjednik povjerenstva)
Committee member Diana Aranza (član povjerenstva)
Committee member Tatjana Matijaš (član povjerenstva)
Granter University of Split (University Department of Health Studies) Split
Defense date and country 2020-07-23, Croatia
Scientific / art field, discipline and subdiscipline BIOMEDICINE AND HEALTHCARE Clinical Medical Sciences
Abstract Cilj ovoga rada je pronalazak najbolje detektorske ploče za potrebe današnje radiologije. Detektorske ploče možemo podijeliti na sustave kompjutorizirane radiografije (fosforne ploče), te sustave digitalne radiografije (CCD, CMOS, silicijske fotodiode i flat panel detektor). Fosforne ploče koriste princip zračenjem uzrokovane fotostimulabilne luminiscencije pri čemu se signali pohranjuju u Eu3+-F-centar kompleksu unutar ploče, te se mogu očitati uz pomoć laserskog čitača (digitalizatora).
Sustave digitalne radiologije možemo podijeliti na neizravne i izravne; neizravni su oni koji zahtijevaju pretvorbu x-zraka u fotone vidljive svjetlosti i za to koriste scintilatore, dok izravni x-zračenje izravno pretvaraju u naboje i za to koriste fotokonduktore. Najbolji scintilator je cezijev jodid, dok je najbolji fotokonduktor amorfni selenij. CCD, CMOS i silicijska fotodioda su isključivo neizravni digitalni detektorski sustavi, dok flat panel detektor možemo naći i u izravnom i neizravnom formatu. CCD slot scan detektorski sistem sa full frame načinom očitavanja naboja, CMOS detektor s aktivnim pikselima, te silicijska fotodioda sa stražnjim osvjetljenjem PDA su se pokazali kao najbolje varijante detektora svoje vrste.
Najbolji flat panel detektor je onaj neizravnog tipa sa scintilatorom od cezijevog jodida, i on je ujedno i najbolji detektor u radiologiji što je dokazano uz pomoć istraživanja sa PBU-S-3, CDRAD 2.0 i TRG fantomom. Istraživanja su se najviše fokusirala na kvalitetu slike i ovisnost kvalitete slike o dozi zračenja kao značajan faktor u zaštiti od zračenja.
Abstract (english) The aim of this thesis is finding the best detection plate for the needs of today's radiology. Detector plates can be divided into computerized radiography systems (phosphor plates) and digital radiography systems (CCD, CMOS, silicon photodiodes and flat panel detector). Phosphor plates use the principle of radiation-induced photostimulable luminescence, where the signals are stored in the Eu3+-F-center complex inside the plate, and can be read with laser scanner (digitizer).
Digital radiology systems can be divided into indirect and direct; indirect are those that require the use of scintillators for conversion of x-rays into photons of visible light and, while direct detectors use photoconductors to directly convert x-rays into charges. The best scintillator is cesium iodide, while the best photoconductor is amorphous selenium. CCD, CMOS and silicon photodiode are exclusively indirect digital detector systems, while flat panel detectors can be found in both direct and indirect formats. CCD "slot scan" detector system with "full frame" mode of charge reading, CMOS detector with active pixels, and silicon photodiode with back illuminated PDA have proven to be the best variants of detectors of their kind.
The best flat panel detector is of the indirect type with a cesium iodide scintillator, and it is also the best detector in radiology, which has been proven with the help of research with PBU-S-3, CDRAD 2.0 and TRG phantom. Research projects were mostly focused on image quality and the dependence of image quality on the radiation dose as a significant factor in the protection against radiation.
Keywords
vrste detektorskih ploča
digitalna radiologija
radiološka tehnologija (ključne riječi unio urednik)
Keywords (english)
types of detector plates
digital radiology
radiological technology (ključne riječi unio urednik)
Language croatian
URN:NBN urn:nbn:hr:176:441034
Study programme Title: Radiologic Technology (university/undergraduate) Study programme type: university Study level: undergraduate Academic / professional title: sveučilišni prvostupnik/prvostupnica (baccalaureus/baccalaurea) radiološke tehnologije (sveučilišni prvostupnik/prvostupnica (baccalaureus/baccalaurea) radiološke tehnologije)
Type of resource Text
File origin Born digital
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Created on 2020-09-03 06:04:14