CDCOM Evaluation [Compatibiliteitsmodus]
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Transcript of CDCOM Evaluation [Compatibiliteitsmodus]
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7/28/2019 CDCOM Evaluation [Compatibiliteitsmodus]
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Evaluation of CDCOM version 1.6
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Problem description
CDCOM version 1.5.2:
As a first approximation of the position ofthe gold discs the gridlines of the phantom
Variations in gridline position led to aninaccurate estimation.
Combined with the size of the search areathis led to incorrect scores for some
specific phantom images.
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CDCOM version 1.6
CDCOM version 1.6.0:
A template of the phantom with all discpositions is translated, rotated and skewed
discs on the images.
For this estimate of the position of the
discs a relatively large search area is used For the actual detection a similar search
area compared to version 1.5.2. is used toget similar detection results
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Evaluation of CDCOM 1.6
Internally two new CDCOM versions have
been made with different methods toestimate the position of the gold discs
version 1.5.2
Debug CDCOM versions have been made
in which each step in the programme couldbe checked
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Evaluation of CDCOM 1.6
A CDMAM phantom was made with only
thick discs
Using subsets of the visible discs the
search area could be evaluated
The three CDCOM versions (1.5.2 and two
new versions) were compared to eachother using numerous CDMAM series
Partly in debug mode
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Evaluation of CDCOM 1.6
Series of images from each manufacturer
have been used to evaluate CDCOM 1.6(between 8 to 164 images per series)
been used (each of these comparisonsincorporated 2 to 26 phantoms)
In total images from approximately 90CDMAM phantoms have been obtainedand used in the evaluation
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Evaluation of CDCOM 1.6
1.000
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Example 1: DR system 1
0.010
0.100
0.10 1.00
CDCOMnew1_1766
CDCOMold_1766
CDCOMnew2_1766
CDCOM1.6
CDCOM old = CDCOM version 1.5.2.CDCOMnew1 and CDCOMnew2 are the two internally used new versions of CDCOMCDCOM 1.6 = CDCOMnew1 plus some features from CDCOMnew2, thecomplete evaluation has been redone with version 1.6
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Evaluation of CDCOM 1.6
1.000
10.000
Example 2: DR system 2
0.010
0.100
0.10 1.00
CDCOMnew1_1002
CDCOMold_1002
CDCOMnew2_1002
CDCOM1.6
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Evaluation of CDCOM 1.6
1.000
10.000
Example 3: DR system 3
0.010
0.100
0.10 1.00
CDCOMold_1077
CDCOM1.6
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Evaluation of CDCOM 1.6
1.000
10.000
Example 4: CR system
0.010
0.100
0.10 1.00
CDCOMold_1002
CDCOM1.6
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Evaluation of CDCOM 1.6
1.000
10.000
Example 5: CR system
0.010
0.100
0.10 1.00
CDCOMnew1_1002
CDCOMold_1002
CDCOMnew2_1002
CDCOM1.6
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Evaluation of CDCOM 1.6
1.000
10.000
Example 6: DR system
0.010
0.100
0.10 1.00
CDCOMnew1_1002
CDCOMold_1002
CDCOMnew2_1002
CDCOM1.6
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Evaluation of CDCOM 1.6
1.000
10.000
Example 7: DR system, phantom comparison
0.010
0.100
0.10 1.00
CDCOMold_1002
CDCOMold_1292
CDCOM1.6_1002
CDCOM1.6_1292
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Evaluation of CDCOM version 1.6
CDCOM has been evaluated extensively
using data from all available systems andphantom comparisons from EUREF,
The search area is in the correct positionin CDCOM version 1.6
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CDCOM version 1.6 was released as beta-
version in September 2011 Potential feedback would be used to
No feedback with incorrect scores or otherbugs have been reported
Since January 1st 2012: CDCOM version1.6-beta has been released as officialversion (version 1.6)