Limited capabilities to manually identify RT planar images and single slice Catphan uploads using DICOM tag values have been added to the image processing system.
RT Planar Images
Applies to: QC3 (MV Planar), QC-kV (kV Planar), Radiation L/F, Picket Fence, Winston-Lutz, Leeds (kV planar), Starshot, Asymmetry, MLC Transmission, Flatness, and VMAT tests.
This is an extension of the existing naming convention system. The logic is:
- If the test name is in the file name that takes the first precedence.
- The DICOM tags will not be checked if a match is found in the file name.
- If no test name matches in the file name then the software checks in the PatientID, StudyID and SeriesDescription tags.
- The tags are checked for each image passed.
- The tags are checked in the order above. If a match is found the search ends for the image.
- If neither is present attempt auto-identification.
- The matching search strings are case insensitive.
Although this forces the initial identification of the image it is not a guarantee that the analysis will run if the image is unsuitable for the chosen analysis.
Test |
Search String |
Notes |
Asymmetric Fields (MV) |
asym |
Both images must have a tag value set. |
Leeds (kV planar) |
leeds |
|
MLC Transmission and Dosimetric Leaf Gap |
mlctrans |
All images in the series must have a tag value set. |
Picket Fence |
picketfence |
If the picket fence test is from a Varian HD MLC then hd should also appear in the string. |
QC-3 (Planar MV) |
qcmv |
Both images must have a tag value set. |
QC-kV (kV Planar) |
qckv |
Both images must have a tag value set. |
Radiation L/F |
radlight |
|
Starshot |
starshot |
Tiff images are assumed to be gantry starshots. DICOM images are assumed to be collimator or table starshot (determined automatically) |
VMAT Test 2 |
vmat2 |
Both images must have a tag value set. |
VMAT Test 3 |
vmat3 |
Both images must have a tag value set. |
Winston Lutz |
winstonlutz |
All images in the series must have a tag value set |
Catphan Analysis
Individual slices can be identified through modification of the DICOM tags to indicate the Catphan module.
- For now, this feature will only work when the user uploads a single slice. It may get extended in the future (for example for things like the multiple slices generally needed for a CTP515)
- The software checks in the PatientID, StudyID and SeriesDescription tags.
- The tags are checked for each image passed.
- The tags are checked in the order above. If a match is found the search ends for the image.
- If no match is found the automatic identification of the slice will be attempted.
- The matching search strings are case insensitive.
- Setting the module code does not guarantee the analysis will complete as a number of other factors come into play.
The following module codes are supported. Note not all modules are currently supported for display.
Module Code |
Description |
Associated Catphan Models |
CTP401 |
Slice Width, Sensitometry and Pixel Size |
CTP500 |
CTP404 |
Slice Width, Sensitometry and Pixel Size |
CTP600, CTP503, CTP504 |
CTP515 |
Low Contrast |
CTP500, CTP600, CTP700, CTP504 |
CTP486 |
Uniformity |
CTP500, CTP600, CTP503, CTP504 |
CTP528 |
Resolution |
CTP500, CTP600, CTP503, CTP504 |
CTP591 |
Bead Geometry Module |
CTP600 |
CTP732 |
Resolution, Geometry Test |
CTP604 |
CTP730 |
Low Contrast |
CTP604 |
CTP729 |
Uniformity |
CTP604, CTP605 |
CTP682 |
Slice Width, Sensitometry, Resolution and Pixel Size |
CTP605, CTP700 |
CTP714 |
Resolution |
CTP700 |
CTP721 |
Wave Insert |
CTP700 |
CTP723 |
Wave Insert |
CTP700 |
CTP712 |
Uniformity |
CTP700 |
CTP777 |
Waterbath |
Not a Catphan |
CTP778 |
Waterbath |
Not a Catphan |
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