RadiAnt DICOM Viewer - Discussion Forum
How does RadiAnt calculate distance?

Sep 25, 2019 06:48 PM
by McGEvan
Hi, all. We are hoping to measure objects in ultrasounds from a variety of manufacturers and many with different scales/resolutions (where 15 pixels on one image is equivalent to 1 mm, for example, while 15 pixels on another image is equivalent to 1.5 mm). When we attempt to do this in batches in a Python environment, we get significant image distortion using PhysicalDeltaX*Columns for the new x dimension and PhysicalDeltaY*Rows for the new y dimension. The rescaled images seem distorted, stretched, and unusable. However, RadiAnt seems to be able to accurately resize and measure regardless of the native image resolution. Does anyone know how RadiAnt calculates "true" millimeter measurements? What DICOM variables is it incorporating? Thanks!
Sep 27, 2019 09:36 PM
by RadiAnt
It gets a bit complicated as far as measurements in ultrasound DICOM images are concerned.
Please check this page with the official DICOM documentation: http://dicom.nema.org/medical/dicom/2016e/output/chtml/part03/sect_C.8.5.5.html
Post reply
Author (first name or pseudonym):

Message:

You have to accept cookies to be able to post messages.
Visitors can post messages on the forum without having to register. Please input your first name or pseudonym in the "Author" field. Do not publish any personally identifiable information (PII).

Please ensure you write your posts in English so that our international audience can understand and reply to your message.

The Administrator reserves the right to remove any messages that violate our forum rules; for example, those that are not related to the RadiAnt DICOM Viewer software, published in a language other than English, contravene regulations, etc.