COMPTON CAMERA

A Compton camera 1 includes a scattering detection unit 10, an absorption detection unit 20, a signal processing unit 30, a first shield unit 41, and a second shield unit 42. The scattering detection unit 10 detects Compton scattering of incident radiation emitted from a radiation source 90. The absorption detection unit 20 detects absorption of incident radiation that has undergone Compton scattering at the scattering detection unit 10. The signal processing unit 30 obtains an image of the radiation source 90 based on coincident detection events of Compton scattering of radiation at the scattering detection unit 10 and absorption of radiation at the absorption detection unit 20. The first and second shield units 41 and 42 are provided between the scattering detection unit 10 and the absorption detection unit 20. The first shield unit 41 selectively allows forward-scattered radiation to pass and selectively blocks back-scattered radiation. This achieves a Compton camera capable of reducing noise.