softw
wher
Y dir
the c
the F
φ
to g
14.4.
a sca
this a
thickn
14.4.
resolu
frequ
incre
Frequ
After the
ware evaluat
re N
x
and N
y
rections, res
oordinate (x
ourier trans
This equa
give a 1-dim
4.
SLICE T
For this e
an in the slic
area is kno
kness.
5.
HIGH C
The Mo
ution. MTF
uency. An M
ases. The li
uency is in l
calculation
tes the noise
,
y
are the nu
spectively. T
x,y) from th
sform of the
ation yields
mensional re
THICKNES
evaluation th
ces and iden
own it is p
CONTRAST
dulation T
F measures t
MTF curve
imiting reso
line pairs pe
No
n of the unifo
e power spec
umber of pix
The term
Δ
he mean pix
pixel value
a 2-dimens
epresentatio
SS
he software
ntify the sta
possible to
T SPATIAL
Transfer Fun
the contrast
begins at
olution equa
er millimete
81
ise and Unifo
formity, and
ctrum (NPS
∆ ∆
xels and
Δ
x
Δ
P(x,y) repre
xel value in
e deviation m
sional NPS,
n:
e will use the
art and end
measure th
L RESOLU
nction (MT
t preserved
1 for zero
als the frequ
er.
ormity Section
using same
S). The NPS
〈|
∆
and
Δ
y
are
esents the d
n the image
matrix.
which is in
,
e Section A
for the thro
he number
UTION
TF) mathem
for a sine w
frequency,
uency at wh
n
e flat-field im
is defined a
,
|
the pixel w
deviation of
, and FT{
Δ
ntegrated ov
A area. The s
ough hole. O
of slices a
matically q
wave patter
, and decre
hich MTF f
mage (slice)
as:
〉
widths in the
f the pixel v
Δ
P(x,y)} rep
ver all phase
software wil
Once the le
and calculat
quantifies c
rn as a func
eases as fre
falls to 0. M
), the
e X and
value at
presents
e angles
ll make
ength of
te their
contrast
ction of
equency
Measure
Содержание EAGLE 3D
Страница 1: ...US Mod SER del Eag S MA gle 3D ANUA AL...
Страница 2: ...1 THIS PAGE WAS INTENTIONALLY LEFT BLANK...
Страница 93: ...92...
Страница 95: ...94...
Страница 96: ...95...
Страница 97: ...96...
Страница 100: ...17 7 5 IRRADI IATED FIE ELD SIZE 99 TOMOGR RAPHIC E EXAM...
Страница 105: ...18 18 1 IDENT PACKA TIFICAT AGE TION LA 104 ABELS...
Страница 106: ...18 2 PRODU UCT 105...
Страница 107: ...19 Pow EQUIP wer supply u PMENT unit slim DIMENS 106 SIONS...