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GT:
All images are resized to
512×512
for display and metrics.
ROIs
Signal (S)
Background (B)
Clear ROIs
Inset zoom:
1
2
3
4
6
8
×
Shape:
Rectangle
Ellipse
Lasso
View:
−
+
Fit
2×
Click–drag to draw the
Signal
or
Background
ROI. Wheel zooms the view, and
Shift + drag
(or middle/right drag) pans. Both ROIs stay synchronized across all tiles.
Use
Lasso
for irregular anatomy (freehand while dragging), or switch to
Rectangle/Ellipse
. Inset appears at
top-left
.
CNR
= |μ
S
−μ
B
|/σ
B
·
SNR
= μ
S
/σ
B
·
CV
= σ
S
/μ
S
·
NSD
= σ
B
/μ
S
Summary
GT:
Per-image metrics
(no file)
Set GT
Remove
CNR: —
SNR: —
CV: —
NSD: —
Image
CNR
SNR
CV (%)
NSD (%)
CNR / GT
SNR / GT
GT ·
Image Analysis Tools
Image Analysis Tools