RX Flashcards

1
Q

aspect ondulatoire

A

λ = CF

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2
Q

aspect corpusculaire

A

E = hF = hC/λ en keV
h cste de Planck = 6,6.10^-34 Js

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3
Q

énergie transportée

A

E = hF = hC/λ en keV

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4
Q

atténuation des RX
Fluence

A

F = F0 e(-µx) en nb/mm²
µ coeff d’atténuation (nature et densité du tissu traversé)
F0 fluence des photons X incidents (mm²)
x épaisseur traversée

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5
Q

contraste

A

C(%)=|D1-D2|/(D1+D2) *100
D densité optique

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6
Q

flou géométrique (Fg)

A

Fg=F(G-1)
G grandissement = SF/SO
SF distance source film
SO distance source objet

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7
Q

flou cinétique (Fc)

A

Fc=Gvt
v vitesse de l’organe
t temps d’acquisition

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8
Q

flou total (Ft)

A

Ft=sqrt(Fg²+Fc²+Fe²)
Fe flou d’écran -> technologie récepteur

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9
Q

EDQ (efficacité quantique de détection)

A

nb RX comptabilisés/nb RX total

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