Hello, good morning.
I wanted to ask how to compress the images or lower the resolution. Let me explain my problem.
My mammogram images are around 16-20 MB, and they’re very large and causing problems with the viewer. I tried:
“IngestTranscoding”: “1.2.840.10008.1.2.4.70”,
“IngestTranscoding”: “1.2.840.10008.1.2.4.80”
“IngestTranscoding”: “1.2.840.10008.1.2.4.90”,
But I couldn’t get them to less than 11 MB.
I wanted to know how I can do this or resolve this. What alternative do I have?
For example, I see in this link, OHIF Viewer , that mammograms are 4 MB in size. How can I get this?
Greetings, everyone.
orthanc.json (5.5 KB)
Hello,
It is not surprising that lossless compression schemes such as JPEG-LS and JPEG2000 typically achieve only 30% to 50% compression on medical images, given that these images often use a bit depth equal or greater than 10 bits per pixel.
Regarding the public OHIF images, I cannot provide any insight, as I cannot find a way to download the raw DICOM files. My guess is either that their resolution is smaller than your mammograms, that their bit depth equals 8 bits per pixel, or that they use a destructive compression (such as JPEG).
Regards,
Sébastien-
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See if you can downsize the MG images to lower resolution in your imaging modality. The default config for most CR/MG devices usually selects the highest resolution. The console may have options to downscale the resolution. You may need to experiment selecting the optimal size that looks good on print and screen.
Dear Sir, thank you for your help.
Since I don’t have access to the chassis digitizer settings, what I did was generate a hook and rescale the images with Python, leaving them at approximately 6 MP, going from 12 MB to 4 MB. This significantly improved bandwidth and fluidity, and prevented crashes in some browsers. It took me a while, but I was able to do it.
Regards