Monte Carlo simulation of multi-head Si/CdTe Compton camera for medical imaging

We have developed a prototype of Compton camera using Si/CdTe semiconductors for medical imaging. In the case where a Compton camera has a single head and therefore the detection area of the Compton camera is restricted to small region, position resolution of depth direction is expected to be low. To overcome this weakness, we propose multi-head Compton camera. In this work, we evaluated the position resolutions of single- and double-head Compton camera by using Monte Carlo simulation. Consequently, the position resolution is about 6 mm for double-head camera while the position resolution of depth direction is about 15 mm for single-head camera. These results indicate that the position resolution is improved and clear 3D-image is taken by using multi-head Compton camera.