Mobile X-ray unit capture the knee in motion

October 3, 2006 Walking is a dynamic process, so it might come as a shock to realise that up to now the function of artificial knee joints has been analysed using static images of extended and bent knees. However, these were scarcely able to explain why certain patients’ prostheses were painful again and again. This is a big problem, because about one million artificial knees are implanted each year, 40,000 of them in Switzerland. The situation led researchers at the Institute for Biomechanics to analyse the problem in more detail and a mobile X-ray unit was developed that allows the knee to be x-rayed during normal walking. The purpose of the equipment is to help understand how an implanted artificial knee joint behaves during the everyday movement of walking.

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