1. A method for estimating a mechanical property of anatomy, the method comprising: estimating, by a processor, first anatomy locations of a valve of a patient from first medical imagedata of the patient at a first time; estimating, by the processor, second anatomy locations of the valve of the patient from second medical image data of the patient at a second time different than the first time, the second anatomy locations being for a same anatomy of the valve as the first anatomy locations; modeling, by the processor, the valve with a biomechanical model, which is a function of the mechanical property and a displacement of the first anatomy locations to the second anatomy locations; and inversely solving, by the processor, for a value of the mechanical property of the valve as a function of the biomechanical model and a similarity of the displacement with displacement output by the biomechanical model.