Detector device, dual energy CT system and detection method using same

摘要

A detector device (20) comprises multiple detector components (21). Each component comprises at least one detection crystal unit (22) having a first energy response and arranged at intervals along a first direction and at least one detection crystal unit (23) having a second energy response and arranged at intervals along the first direction. Each detection crystal unit (22) comprises at least one detection crystal (22a, 22b, 22c…) having the first energy response and arranged along a second direction. Each detection crystal unit (23) comprises at least one detection crystal (23a…) having the second energy response and arranged along the second direction. The second direction is perpendicular to the first direction, and the second energy is higher than the first energy. Observed along an X ray incident direction, the detection crystal unit (22) having the first energy response and the detection crystal unit (23) having the second energy response are at least partially in a staggered arrangement along the first direction. A dual energy CT system with the detector device (20) and a CT detection method using the system are also provided.