Developers and users of registration methods have measured the accuracy and precision of their methods in many ways. Thus it is difficult to provide a principled basis for the selection of a registration method for use in a given application. The experts served without compensation and received only partial reimbursement of their travel expenses. Their inputs to the Study were by email and participation in three carefully structured workshops. A full evening discussion of Study findings was held in conjunction with the NASA workshop and also during the 1998 SPIE Medical Imaging Symposium in February.
Experts disagree on the criteria for developing a gold standard.
No appropriate standards for image registration algorithms have been developed. No specific guidelines exist to determine safety and efficacy. No defense technologies were identified that apply directly to medical imaging registration. Only one intelligence technology was determined to be applicable. It is recommended that a digital library of medical images be assembled and maintained as a standard reference for testing image registration algorithms.