Appendix
2660021169012 Rev. A 2017-12
CIRRUS HD-OCT User Manual
B-4
Table B-3: Comparison of CIRRUS HD-OCT Central Subfield Mean Thickness to
Stratus OCT for the Six Categories
By design, the segmentation algorithms in CIRRUS HD-OCT search for different boundaries
than those in Stratus OCT. Specifically, Stratus OCT locates the top of the bright reflective
layer that is now known to represent the junction between inner and outer segments of the
photo receptors as the lower boundary of the retina for its thickness calculations; whereas
CIRRUS locates the brightest layer in the RPE / outer segment complex, which is thought to
correspond to the RPE.
shows an example of the layers identified for a normal
eye by Stratus OCT, while
shows the same eye scanned and segmented on
CIRRUS HD-OCT. Although the retinal tissue has the same vertical extent (thickness) in both
1 - AMD
0
200
400
600
800
0
200
400
600
800
Central Subfield measured on Stratus (um)
C
e
n
tral
S
u
b
fi
e
ld
m
easu
red
o
n
Cir
ru
s
(u
m)
2 - Diabetic Retinopathy
0
200
400
600
800
0
200
400
600
800
Central Subfield measured on Stratus (um)
C
e
n
tral
S
u
b
fi
e
ld
m
easu
red
o
n
Cir
ru
s
(u
m)
3 - VRI Disorders
0
200
400
600
800
0
100
200
300
400
500
600
700
800
Central Subfield measured on Stratus (um)
C
e
nt
ra
l S
u
bf
ie
ld
m
e
a
s
u
re
d
on
Cir
ru
s
(u
m)
4 - Other Retinal Pathologies
0
200
400
600
800
0
200
400
600
800
Central Subfield measured on Stratus (um)
C
e
n
tral
S
u
b
fi
e
ld
m
easu
red
o
n
C
irrus (
u
m
)
5 - Macular Edema
0
200
400
600
800
0
200
400
600
800
Central Subfield measured on Stratus (um)
C
e
n
tral
S
u
b
fi
e
ld
m
easu
red
o
n
C
irrus (
u
m
)
6 - No Retinal Pathology
0
200
400
600
800
0
200
400
600
800
Central Subfield measured on Stratus (um)
C
e
n
tral
S
u
b
fi
e
ld
m
easu
red
o
n
Cir
ru
s
(u
m)
Summary of Contents for CIRRUS HD-OCT 500
Page 1: ...2660021156446 B2660021156446 B CIRRUS HD OCT User Manual Models 500 5000 ...
Page 32: ...User Documentation 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 2 6 ...
Page 44: ...Software 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 3 12 ...
Page 58: ...User Login Logout 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 4 14 ...
Page 72: ...Patient Preparation 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 5 14 ...
Page 110: ...Tracking and Repeat Scans 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 6 38 ...
Page 122: ...Criteria for Image Acceptance 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 7 12 ...
Page 222: ...Overview 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 9 28 ...
Page 256: ...Log Files 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 11 18 ...
Page 308: ...Appendix 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual A 34 ...
Page 350: ...CIRRUS HD OCT User Manual 2660021169012 Rev A 2017 12 I 8 ...
Page 351: ...CIRRUS HD OCT User Manual 2660021169012 Rev A 2017 12 ...