Might be a CT scan slice through the protrusions(epicondyles) of the femur while the knee is bent 90°. So the lenght of the femur is coming out the back of this picture. Or the same posture and angle bit with a normal X-ray. Though I would have expected more density in between the epicondyles. So probably CT
It’s only assumed the Netherlands opposes it because of the now fallen governments stance on it before. We all know that their campaign promises and ‘regeerakkoord’ are completly meaningless. So I’m still trying to call and emailing the dutch MEP’s