compressed ultrasound

[uzleuven]

Hi,

I can't read images coming from a specific camera, sent from PACS to my storescp and then to the application. It does work when I directly send these images from PACS to the application.
I tried to compare the dcmdumps between images that did and didn't went 'correctly' over storescp to my application.

working:
# Dicom-Data-Set
# Used TransferSyntax: JPEG Baseline
(0008,0008) CS [DERIVED\PRIMARY\\0011\GEMSMULTIFRAME\GEMSMGCOUNT1] # 50, 6 ImageType
(0008,0016) UI =UltrasoundMultiframeImageStorage # 28, 1 SOPClassUID
(0008,0018) UI [1.2.336.74746479561284814812455715050514103974759909214] # 56, 1 SOPInstanceUID

not working:
# Dicom-Data-Set
# Used TransferSyntax: JPEG Baseline
(0008,0008) CS [DERIVED\PRIMARY\\0001\GEMSMULTIFRAME\GEMSMGCOUNT1\\GEMSCOMPRESSED] # 66, 8 ImageType
(0008,0016) UI =UltrasoundMultiframeImageStorage # 28, 1 SOPClassUID
(0008,0018) UI [1.2.840.113619.2.98.8527.1254727911.0.1264.512] # 46, 1 SOPInstanceUID


I tried the --prefer-uncompr option but thid din't work...


Regards,

Jan

[Michael Onken]

Hi Jan,

if this is the only difference (ImageType tag) then your application seems to be very picky about what it accepts in that tag and what not. Also I wonder that the SOPInstanceUID is different -- so these are different images you received, not the same one. So I guess there are more differences than the ones you quoted.

However, if the ImageType actually differs, the question is who changed that tag resulting in the non-working version, either storescp or the sender. The sender might differentiate between different receivers and changes attribute encodings accordingly. In this case I would think this is not very probable. Alternatively storescp changes the attribute encoding of ImageType when storing the file to disk. This may be a bug or the transmitted file contains errors. What you can try first is forcing storescp to write the file bit by bit as it comes in by setting option --bit-preserving. Then look at the dump again (hopefully dcmdump is not suffering of the same possible bug as storescp).

Regards,
Michael

[uzleuven]

I wanted to attach the files but I doidn't see where I could do this...

[Michael Onken]

Hi,

Did you try out --bit-preserving?

Attaching is not possible; if they are not to huge (say exceed 10 MB or something), you might send them to dicom at offis dot de.

Regards,
Michael