Images too bright (Panoramic Carestream-Trophy images)

[leonardorame]

Hi, I'm trying to find out why the images generated by a Carestream Trophy K9000H modality looks bright when opened with Weasis (and also with Cornerstone).

This is how the image is shown in the acquisition software:

And here's the same image opened with Weasis:

This is the dicom header:

(0002,0001) [OB] FileMetaInformationVersion: binary data
(0002,0002) [UI] MediaStorageSOPClassUID: 1.2.840.10008.5.1.4.1.1.1.1.1
(0002,0003) [UI] MediaStorageSOPInstanceUID: 1.2.250.1.90.3.1649822005.1663850868.523
(0002,0010) [UI] TransferSyntaxUID: 1.2.840.10008.1.2.4.70
(0002,0012) [UI] ImplementationClassUID: 1.2.276.0.7230010.3.0.3.6.2
(0002,0013) [SH] ImplementationVersionName: OFFIS_DCMTK_362
(0002,0016) [AE] SourceApplicationEntityTitle: KODAK9000GralPaz
(0008,0005) [CS] SpecificCharacterSet: ISO_IR 100
(0008,0008) [CS] ImageType: ORIGINAL\PRIMARY
(0008,0016) [UI] SOPClassUID: 1.2.840.10008.5.1.4.1.1.1.1.1
(0008,0018) [UI] SOPInstanceUID: 1.2.250.1.90.3.1649822005.1663850868.523
(0008,0020) [DA] StudyDate: 20220922
(0008,0021) [DA] SeriesDate: 20220922
(0008,0022) [DA] AcquisitionDate: 20220922
(0008,0023) [DA] ContentDate: 20220922
(0008,0030) [TM] StudyTime: 094609
(0008,0031) [TM] SeriesTime: 094748
(0008,0032) [TM] AcquisitionTime: 094748
(0008,0033) [TM] ContentTime: 094748
(0008,0050) [SH] AccessionNumber: 
(0008,0060) [CS] Modality: PX
(0008,0068) [CS] PresentationIntentType: FOR PROCESSING
(0008,0070) [LO] Manufacturer: Carestream-Trophy
(0008,0080) [LO] InstitutionName: 
(0008,0090) [PN] ReferringPhysicianName: Tel 351-5891313^MAXITY Cent Diag Od.^Felix Frías 38
(0008,1030) [LO] StudyDescription: 
(0008,1050) [PN] PerformingPhysicianName: Tel 351-5891313^MAXITY Cent Diag Od.^Felix Frías 38
(0008,1052) [SQ] PerformingPhysicianIdentificationSequence: 
(0008,1090) [LO] ManufacturerModelName: K9000H
(0008,2111) [ST] DerivationDescription: Lossless JPEG compression, selection value 1, point transform 0, compression ratio 2.656
(0008,2218) [SQ] AnatomicRegionSequence: 1 item
--> ITEM #1
-->(0008,0100) [SH] CodeValue: T-D1213
-->(0008,0102) [SH] CodingSchemeDesignator: SNM3
-->(0008,0104) [LO] CodeMeaning: Jaw Region
(0008,9215) [SQ] DerivationCodeSequence: 1 item
--> ITEM #1
-->(0008,0100) [SH] CodeValue: 121327
-->(0008,0102) [SH] CodingSchemeDesignator: DCM
-->(0008,0104) [LO] CodeMeaning: Full fidelity image
(0009,0011) [LO] PrivateCreatorID: TROPHY
(0009,1105) [DS] PrivateTag: 6.14.7.3
(0009,1109) [UL] PrivateTag: 0
(0009,110A) [UL] PrivateTag: 2343147521
(0009,1111) [US] PrivateTag: 0
(0009,1115) [US] PrivateTag: 0
(0009,1117) [SL] PrivateTag: 4
(0009,1118) [SL] PrivateTag: 0
(0009,1119) [SL] PrivateTag: 0
(0009,111A) [CS] PrivateTag: 00
(0009,111B) [DS] PrivateTag: 0.0786885227\0.0786885227
(0009,1121) [US] PrivateTag: 1198
(0009,1123) [US] PrivateTag: 1
(0009,1124) [SS] PrivateTag: 0\2706
(0009,1125) [US] PrivateTag: 1
(0009,11B0) [SQ] PrivateTag: 1 item
--> ITEM #1
-->(0009,0011) [LO] PrivateCreatorID: TROPHY
-->(0009,11B1) [CS] PrivateTag: ECLIPSE
-->(0009,11B2) [US] PrivateTag: 0
-->(0009,11B3) [SS] PrivateTag: 0
(0010,0010) [PN] PatientName: ANONIMYZED
(0010,0020) [LO] PatientID: ANONIMYZED
(0010,0030) [DA] PatientBirthDate: ANONIMYZED
(0010,0040) [CS] PatientSex: O
(0018,0060) [DS] KVP: 70
(0018,1000) [LO] DeviceSerialNumber: JGTD014/CCD_E1816
(0018,1020) [LO] SoftwareVersions: TW 6.14.7.3
(0018,1050) [DS] SpatialResolution: 5
(0018,1150) [IS] ExposureTime: 14300
(0018,115E) [DS] ImageAndFluoroscopyAreaDoseProduct: 0.82650000
(0018,1164) [DS] ImagerPixelSpacing: 0.096\0.096
(0018,1401) [LO] AcquisitionDeviceProcessingCode: 23
(0018,1508) [CS] PositionerType: PANORAMIC
(0018,1510) [DS] PositionerPrimaryAngle: 0
(0018,7004) [CS] DetectorType: SCINTILLATOR
(0018,700A) [SH] DetectorID: 
(0018,702A) [LO] DetectorManufacturerName: Carestream-Trophy
(0018,702B) [LO] DetectorManufacturerModelName: K9000H
(0018,7030) [DS] FieldOfViewOrigin: 0\0
(0018,7032) [DS] FieldOfViewRotation: 0
(0018,7034) [CS] FieldOfViewHorizontalFlip: NO
(0018,8151) [DS] XRayTubeCurrentInuA: 10000
(0020,000D) [UI] StudyInstanceUID: 1.2.250.1.90.1.1649822005.1663850769.558
(0020,000E) [UI] SeriesInstanceUID: 1.2.250.1.90.2.1649822005.1663850868.523
(0020,0010) [SH] StudyID: 
(0020,0011) [IS] SeriesNumber: 1
(0020,0013) [IS] InstanceNumber: 1
(0020,0020) [CS] PatientOrientation: L\F
(0020,0062) [CS] ImageLaterality: U
(0020,4000) [LT] ImageComments: 
(0028,0002) [US] SamplesPerPixel: 1
(0028,0004) [CS] PhotometricInterpretation: MONOCHROME2
(0028,0010) [US] Rows: 1536
(0028,0011) [US] Columns: 2706
(0028,0030) [DS] PixelSpacing: 0.078689\0.078689
(0028,0100) [US] BitsAllocated: 16
(0028,0101) [US] BitsStored: 12
(0028,0102) [US] HighBit: 11
(0028,0103) [US] PixelRepresentation: 0
(0028,0301) [CS] BurnedInAnnotation: NO
(0028,1040) [CS] PixelIntensityRelationship: LIN
(0028,1041) [SS] PixelIntensityRelationshipSign: -1
(0028,1052) [DS] RescaleIntercept: 0
(0028,1053) [DS] RescaleSlope: 1
(0028,1054) [LO] RescaleType: US
(0028,2110) [CS] LossyImageCompression: 00
(0040,0555) [SQ] AcquisitionContextSequence: 
(0088,0200) [SQ] IconImageSequence: 1 item
--> ITEM #1
-->(0008,2111) [ST] DerivationDescription: Lossless JPEG compression, selection value 1, point transform 0, compression ratio 1.4421
-->(0008,9215) [SQ] DerivationCodeSequence: 1 item
----> ITEM #1
---->(0008,0100) [SH] CodeValue: 121327
---->(0008,0102) [SH] CodingSchemeDesignator: DCM
---->(0008,0104) [LO] CodeMeaning: Full fidelity image
-->(0028,0002) [US] SamplesPerPixel: 1
-->(0028,0004) [CS] PhotometricInterpretation: MONOCHROME2
-->(0028,0010) [US] Rows: 153
-->(0028,0011) [US] Columns: 270
-->(0028,0100) [US] BitsAllocated: 8
-->(0028,0101) [US] BitsStored: 8
-->(0028,0102) [US] HighBit: 7
-->(0028,0103) [US] PixelRepresentation: 0
-->(7FE0,0010) [OB] PixelData: binary data
(2050,0020) [CS] PresentationLUTShape: IDENTITY
(7FE0,0010) [OB] PixelData: binary data

Any hint?

[nroduit]

There is no VOI LUT value, so the image is displayed with the "Auto-Level" preset.
It seems to have values in the private fields. Maybe the W/L values are 2706/1198 or some other combination. These values should be put in the official DICOM fields.

[leonardorame]

I found, if I apply the Logarithmic Inv LUT Shape the result is pretty similar to the image shown by the vendor software.

Now, is there a way to pass that parameter (LUT Shape: Logarithmic Inv) when launching Weasis using the weasis:// protocol handler?

[leonardorame]

With DCMTK's dcmj2pnm, using the +Wh parameter I came up with this:

dcmj2pnm +Wh 10 p1.pano p1.jp

The +Wh parameter means compute VOI window using Histogram algorithm, ignoring n percent. Is there something similar in Weasis?

[nroduit]

This feature is already on my todo list but with low priority.

The best action is to insist that the supplier report these W/L values in the standard fields provided.

[leonardorame]

Good news!, Horos displays the image exactly as the Kodak/Carestream software.

[aglv]

Hey all, FYI this is also being discussed here: horosproject/horos#716