Localizing the Imaged-Object Position by a Stationary Position-Sensitive Scintillation Camera Using Tilted-Collimator Technique

In our previous studies we have presented a method to measure the detector-to-object distance from the images obtained with a stationary planar high-spatial-resolution gamma-ray camera for in-vivo small-object studies [1,2]. It exploits the shift of the imaged object in the image plane, obtained for tilted positions of a parallel-hole lead collimator. Thus the three-dimensional information about the object position can be obtained without moving either the camera or the object. We have shown the effectiveness of the method for point-like gamma-ray emitting objects. In the present work we show the results of series of measurements conducted for real three-dimensional small-size objects.