Deze samenvatting van periode 3 radiologie van MBRT helpt je met de voorbereiding van de toets. Hierin staat de nodige informatie voor het tentamen. Zoals de TGV formulieren van deze periode, anatomie, fysische eigenschappen van de detectoren, technische instellingen en overige informatie op aanvul...
Medisch Beeldvormende en Radiotherapeutische Technieken
Radiologie
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Radiologie
Bekken, schouder en heup
Hogeschool
Inholland
MBRT
JAAR 1
Periode 3
, Introcollege vRD 03-01:
Spectrum + Filtratie
Figuur 1 CONTINUE SPECTRUM
Continu spectrum
Eigen filterwaarde buis
Karakteristieke straling
Invloed kV en mAs op spectrum
Invloed extra filtratie
Inherent of eigen filter
1. anodemateriaal
2. wandmateriaal van de inzetbuis
3. olie tussen inzetbuis en buisomhulling
4. buisvenster, (dikke laag perspex)
Figuur 2 UITTREDEND SPECTRUM
5. spiegeltje in het diafragma
6. dun laagje perspex dat het
diafragmablok afsluit
fotonen kunnen niet afgeremd worden.
Bij een hoger kV neemt het stralencontrast af.
kV zorgt voor breder en hoger spectrum.
mAs zorgt alleen voor hoger spectrum.
Filter filtert onder de 30kV. Piek wordt lager.
Flatpanel detectoren
Direct / indirect
Verspreiding
GadOx of CSI
Spatiele resolutie
Karakterstieke straling is 0-10 keV. Deze filter je dan ook helemaal weg.
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