DATORTOMOGRAFI
DATORTOMOGRAFI
DATORTOMOGRAFI
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Stråldosbegrepp för<br />
datortomografi (2)<br />
CTDI = Computed Tomography Dose Index,<br />
anges i mGy<br />
CTDI<br />
D(z) = DLP<br />
100<br />
=<br />
+ 50mm<br />
−50<br />
∫<br />
mm<br />
D(<br />
z)<br />
dz<br />
N ⋅T<br />
Anges som absorberad dos i luft, men mäts<br />
praktiskt inuti ett plexiglasfantom