OHIF Web viewer (SR Annotation)

Hello.

After loading the SR polyline annotation file I made into the web viewer, there is something strange when I check the perimenter of the polyline by track measurement for this series.

In my reply there is two images, first one is just line and second one is rectangle.
But the difference of perimeter is only 3 mm…
is it right ?

화면 캡처 2025-05-21 145945