that i
samp
will b
transi
(ROI
gener
by nu
magn
frequ
14.4.
differ
their
turns
sectio
ROIs
devia
ROIs
create
14.5
F
A
P
exam
For calcu
is an edge g
pled capture
For this e
be used the
ition of the
Using the
I) around the
A particu
rate the Spa
umerically
nitude of the
uency results
6.
LOW CO
The low-
rentiate a lo
size and co
more diffic
In order
on B of the
s with same
ation of the
s is set to 3
This anal
ed in the rep
. DOSE
M
For periodic
A KAP-mete
Place the d
mination prot
ulation of th
gradient MT
devices.
evaluation th
conical thro
slanted edg
e generated
e black-whi
Bl
ular column
atial Freque
calculating
e FFT of thi
s the MTF.
ONTRAST
-contrast de
ow-contrast
ontrast leve
cult to recog
to determin
phantom. T
diameter. T
means is o
.29 times th
lysis is repe
port.
MEASURE
measureme
er dosimeter
dosimeter a
tocols.
he MTF the
TF method
the software
ough hole w
e with high
d image the
ite transition
lack-white tra
n is selected
ency Respon
the first de
is LSF is ca
T DETECTA
etectability
object from
el to the bac
gnize them f
ne the LCD
The center r
The mean pi
obtained. Th
he standard
eated with d
MENT
ent of the do
r is required
at the tube
82
software w
specifically
e will use th
with air. The
contrast.
software w
n of the slan
ansition of th
d, and all pix
nse (SFR). L
erivative of
alculated. P
ABILITY
(LCD) mea
m its backgro
ckground. A
for the same
D, the softw
region of th
ixel value of
he contrast
deviation t
different RO
ose it will us
d for this ins
exit and
will use the
y suited to M
he Section A
e air and acr
will select a
nted edge.
e slanted edg
xel values i
Line Spread
f the SFR.
Plotting the
asures the a
ound. The v
As the size
e contrast le
ware will us
his slice is d
f each ROI
of an objec
to be disting
OIs sizes an
se air kerma
spection.
measure K
Slanted-Ed
MTF calcula
A area. For t
rylic will cr
rectangular
ge Air/Acrylic
in this colum
d Function (
Once the L
FFT magni
ability of a
visibility of o
of these ob
vel.
se a homog
divided in a
is calculated
ct with the s
guished from
nd a contras
a-area produ
KAP value
ge MTF tec
ations for sp
the high con
reate a black
r region-of-
c
mn are reco
(LSF) is ge
LSF is know
itude versus
CT equipm
objects depe
bjects decre
geneous slic
number of c
d, and the st
same size o
m the backg
st-detail diag
uct (KAP).
for all av
chnique
patially
ntrast it
k-white
interest
orded to
nerated
wn, the
s spatial
ment to
ends on
eases, it
ce from
circular
tandard
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ground.
gram is
vailable
Summary of Contents for EAGLE 3D
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