Disclosed herein is an apparatus, comprising: a platform configured to support a human body on a first surface of the platform； a first set of radiation detectors arranged in a first layer, wherein the radiation detectors of the first set are attached to a second surface of the platform opposite the first surface； wherein the radiation detectors of the first set are configured to detect radiation from a radiation source inside the human body.本文公開一種裝置，其包括：平台，其配置成在所述平台的第一表面上支撐人體；第一組輻射檢測器，其佈置在第一層中，其中所述第一組輻射檢測器連接到所述平台中與所述第一表面相對的第二表面；其中所述第一組輻射檢測器配置成檢測來自人體內輻射源的輻射。
