the penhip methode measures the laxity from the hips, so how much space you can make in the hip joint. and looks for deformations in the hip.
The 'normal' method only looks for deformations.
In holland you have to make the 'normal' hip xray, you do not have a real choice. And yes you can make the penhip in holland but it can not be evaluated officially in holland and I think the evaluation is done in the USA.
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