Compton camera

A Compton camera comprising:

• a scattering detection unit including a scatterer to cause incident radiation to undergo Compton scattering and detecting Compton scattering of the radiation at the scatterer;
• an absorption detection unit including an absorber to absorb radiation incident after undergoing Compton scattering at the scatterer and detecting absorption of the radiation at the absorber;
• a signal processing unit obtaining an image of a radiation source based on coincident detection events of Compton scattering of radiation at the scattering detection unit and absorption of radiation at the absorption detection unit;
• and
• a first shield unit provided between the scattering detection unit and the absorption detection unit and configured, among forward-scattered radiation being radiation that has undergone Compton scattering in a forward direction at the scatterer, and back-scattered radiation being radiation that has passed through the scatterer without being scattered or absorbed and has thereafter undergone Compton scattering in a backward direction at the absorber, to selectively allow the forward-scattered radiation to pass and to selectively block the back-scattered radiation.