The present application relates to procedures for the determination of the activity of the protease which activates factor VII, also known as factor VII activating protease or FSAP. A throttle member of the motorcycle is initially maintained with an installation fixture. Additionally, a processor can generate a volumetric deformation function using splines, parametric techniques, or the like, and can deform the model to fit the image in real time, in response to user manipulation of the model.