| 摘要 |
PURPOSE:To eliminate measuring time for altering the collimation direction of another layer in substance within a tomographic surface while a data is being sampled with a radiation detector through a radiation collimator. CONSTITUTION:A radiation data released from a radioactive isotope in a single photon radioactive nuclide on a tomographic surface 6 of an object 5 is sampled with a radiation detector 1 through a collimator 3 or the like. During the sampling, the collimation direction is altered with the rotation of the same ring-shaped collimator 4 in the other layer by the specified angle. By the repetition of the same operation, radiation data can be sampled and thus, masuring time can be eliminated for the alteration of the collimation direction in substance within the tomographic layer thereby reducing the overall measuring time. |
