Hi, On the Dicom tag : (0018, 115E ) it stores the DAP value eg 1.149 with no units. It is known that DAP is expressed in Gy.cm2 but under dicom standards its given as dGy.cm2. I know they just differ by prefix and contextually they the same. How would I know what units my DAP value actually is ? My X ray was captured with a Siemens machine, and the image was complemented with a Dicom info. Since it follows Dicom standards can I assume it'll use dGy.cm2 as its units or could there be an exception to this ? Basically I'm asking if a system is following dicom protocols then they must have the the same units stipulated by Dicom standards or can they differ i.e instead of dGy.cm2, they present the value stored in this tag in Gy.cm2 ? Note: this is not a private tag. Thanks
Wow, great question. Because it is not a required tag it is technically possible that a system could be configured to store the DAP value by another measure, say mSv. However to do that would require some serious DICOM work and probably involve configuring the modality itself to convert the DAP value into the other value. I can't think of a practical reason anyone would want to take that challenge on. In short, is it possible? yes. Is it likely someone would actually do that? No way.
Dicom supports *all* 65,536 shades of gray. WOW! I didn't know there are exactly 65536 shades of gray, and no more. How about the rest of them colors? How many colors does it support?
Medical images produced by x-ray detectors, computed tomography (CT) scanners, and other modalities typically contain between 12-16 bits/pixel, which corresponds to 4,096-65,536 shades of gray.
Excellent and vdery clear , pleasemake video on SNOMED
Short, simple and crisp
Best video I have seen on Dicom
Great work, my compliments.
Best DICOM Video! Thank you!
Great videos! Super informative. Do you have sources for all of this info by any chance?
Hi,
On the Dicom tag : (0018, 115E ) it stores the DAP value eg 1.149 with no units. It is known that DAP is expressed in Gy.cm2 but under dicom standards its given as dGy.cm2. I know they just differ by prefix and contextually they the same. How would I know what units my DAP value actually is ? My X ray was captured with a Siemens machine, and the image was complemented with a Dicom info. Since it follows Dicom standards can I assume it'll use dGy.cm2 as its units or could there be an exception to this ? Basically I'm asking if a system is following dicom protocols then they must have the the same units stipulated by Dicom standards or can they differ i.e instead of dGy.cm2, they present the value stored in this tag in Gy.cm2 ? Note: this is not a private tag.
Thanks
Wow, great question. Because it is not a required tag it is technically possible that a system could be configured to store the DAP value by another measure, say mSv. However to do that would require some serious DICOM work and probably involve configuring the modality itself to convert the DAP value into the other value. I can't think of a practical reason anyone would want to take that challenge on. In short, is it possible? yes. Is it likely someone would actually do that? No way.
Dicom supports *all* 65,536 shades of gray. WOW! I didn't know there are exactly 65536 shades of gray, and no more.
How about the rest of them colors? How many colors does it support?
Medical images produced by x-ray detectors, computed tomography (CT) scanners, and other modalities typically contain between 12-16 bits/pixel, which corresponds to 4,096-65,536 shades of gray.
I have found Only this video explain DICOM in simple words
Thank you!
Can you suggest some possible usecases / problem statement using DICOM files
great, thanks so much
Useful
thank you very much
so usefullllll. thanks
😌
Best DICOM Video! Thank you!
Wow, thanks! :)