Evaluation of a rigid registration method of lung perfusion SPECT and thoracic CT.

Objective: The objective of our study was to evaluate a rigid registration method in lung perfusion SPECT using thoracic CT as a standard.

Materials And Methods: The reproducibility of markers selection and the robustness of the method were assessed on a torso phantom. The accuracy of registration regarding the number and location of markers and the breathing state during CT was evaluated on eight patients using 10 external markers placed around the thorax before SPECT and CT acquisitions.