  Radio-Stereometric-Analysis and x-ray fluoroscopy are radiological techniques
that require dedicated software to process data. The accurate calibration of
these software is therefore critical. The aim of this work is to produce a
protocol for evaluating the softwares' accuracy according to the ISO-5725. A
series of computer simulations of the radiological setup and images were
employed. The noise level of the images was also changed to evaluate the
accuracy with different image qualities. The protocol was tested on a custom
software developed by the authors. Radiological scene reconstruction accuracy
was of (0.092 +- 0.14) mm for tube position, and (0.38 +- 0.31) mm / (2.09 +-
1.39) deg for detectors oriented in a direction other than the source-detector
direction. In the source-detector direction the accuracy was of (2.68 +- 3.08)
mm for tube position, and of (0.16 +- 0.27) mm / (0.075 +- 1.16) deg for the
detectors. These disparate results are widely discussed in the literature.
Model positioning and orientation was also highly accurate: (0.22 +- 0.46) mm /
(0.26 +- 0.22) deg. Accuracy was not affected by the noise level. The protocol
was able to assess the accuracy of the RSA system. It was also useful to detect
and fix hidden bugs. It was also useful to detect and resolve hidden bugs in
the software, and in optimizing the algorithms.

Medical Physics;Applied Physics;Data Analysis, Statistics and Probability