using viewer applet

sdf · Post by **sdf** » Tue Mar 16, 2004 7:03 pm

hi all,
maybe this could be OT, maybe i have to talk about it with the applet's author...anyway:

i'm using the applet but i can view only OT dicom file (modality=OT, ecograpy...). in other cases (CR,CT..) i got always the same error:
on dicomdata.java line 55 null pointer exception, caused (i think):
1) a wrong dicom dictionary?
2) some errors on reading some formats?

has someone any idea? can i change dictionary file? or there are some patches all around?

tnx
sdf

Post by **pacsone** » Tue Mar 16, 2004 9:40 pm

Can you view the same image in thumbnail or by clicking on the "Full Size" link from the image list?

While not the original author of this java applet, I can try to find out where the problem is if you can provide the following:

1. The full stack trace from the Java Console. (Not just the last line number as in your posted message)

2. If possible, can you zip the raw image file and send to: "mailto:pacsone@pacsone.net"? You can anonymize the patient information tags if you want to.

Guest · Post by **Guest** » Tue Mar 23, 2004 4:10 am

Has anybody ever used the Radscaper applet viewer? I like to know how it performs, especially for compressed and color images.

Guest · Post by **Guest** » Sun May 16, 2004 5:14 pm

The applet-viewer doesn't work fo me also.
Windows XP, PacsOne Premium Edition, Apache 2.0.40, PHP 4.3.6

DicomFile.Exception: null
java.lang.NullPointerException
at dicomviewer.DicomData.getAnalyzedValueDicomData.java:79)
at dicomviewer.ImageData.setData(ImageData.java:51)
at dicomviewer.Viewer.postData(Viewer.java:683)
at dicomviewer.LoaderThread.run(LoaderThread.java:55)

Images could be seen as thumbnails and in fullsize.

Any hints ?

Regards Patrick

Post by **pacsone** » Tue May 18, 2004 7:59 am

Do you know the transfer syntax the image is encoded?

The Java applet viewer does not yet support any transfer syntaxes other than the DICOM default implicit little-endian transfer syntax. If the image is encoded in the default transfer syntax but you could not view it using the applet, please send a sample to: mailto:pacsone@pacsone.net.

sjk · Post by **sjk** » Fri May 21, 2004 12:45 am

I had similar problem with applet. I am now using Radscaper which seems to be Ok now to display compressed and color images.

Good luck,
SJK

Patje · Post by **Patje** » Sun May 23, 2004 7:33 pm

Anonymous wrote:The applet-viewer doesn't work fo me also.
Windows XP, PacsOne Premium Edition, Apache 2.0.40, PHP 4.3.6

DicomFile.Exception: null
java.lang.NullPointerException
at dicomviewer.DicomData.getAnalyzedValueDicomData.java:79)
at dicomviewer.ImageData.setData(ImageData.java:51)
at dicomviewer.Viewer.postData(Viewer.java:683)
at dicomviewer.LoaderThread.run(LoaderThread.java:55)

Images could be seen as thumbnails and in fullsize.

Any hints ?

Regards Patrick

Patrick,

have the same problem with images send from eFilm 1.9.3, on the other hand it works fine if the same images were send from the Conquest Server.

Regards,

P@je

Post by **pacsone** » Mon May 24, 2004 12:54 am

I'd like to investigate this problem further as there's more user complaints. Would it be possible for either of you to send a sample image which is viewable in thumbnail and full-size, but not from the java applet, to the following email address:

mailto:pacsone@pacsone.net

Thanks.

Guest · Post by **Guest** » Mon May 24, 2004 8:28 am

I found, that the images stored by Pacsone are containing a app. 1KB header which couldn't used by the applet-viewer. The files are 515 KB.
Normal DCM-Files are 514 KB.

If I cut the header of the file, the images are correctly visible with the viewer. I am not sure, wether the header is from pacsone or the modality.

I will send you the images.

Regards

Patrick

Post by **pacsone** » Thu May 27, 2004 1:44 am

With the help from Patrick, this problem has been identified as a bug in the Java applet where it was not handling the optional Group Length element (0x7fe0,0000) in the image data properly.

This bug has been fixed and a new version of the applet has been posted on the PacsOne Download website.

Thanks very much for your help in reporting and trouble-shooting this bug.

Guest · Post by **Guest** » Thu Jun 10, 2004 6:13 pm

No problem,

thank you for the fast fixing of the problem.

Regards Patrick