The CT images
by
P
hoton
-
counting type X
-
ray CT ha
ve
been studied on
the
image quality. Compared to current
integration mode
imager
s
,
this
type of detector
can yield clearer CT image under low
-
dose. In this report, CT image
s
by
Photon
-
counting typ
e detector
are
evaluated
in association with the fluctuation of energy spectra
.