| 摘要 |
<p>A nuclear medicine gamma camera for diagnostic imaging includes a rotating gantry (16) which defines a subject receiving aperture (18). A support (10) supports a subject (12) being examined within the subject receiving aperture (18). A plurality of detector heads (20a-c) is movably attached to the rotating gantry (16). The detector heads (20a-c) are rotated about the subject (12) with the rotation of the rotating gantry (16). A plurality of radiation sources (30a-c) are mounted to the detector heads (20a-c) such that transmission radiation (32a-c) from the radiation sources (30a-c) is directed toward and received by corresponding detector heads (20a-c) positioned across the subject receiving aperture (18) from the radiation sources (30a-c). Translation means (22a-c) independently translates the detector heads (20a-c) laterally in directions tangential to the subject receiving aperture (18). A contouring device (40) runs a contouring operation wherein the translation means (22a-c) translates the detector heads (20a-c) laterally, and the contouring device (40) measures outer boundaries of the subject (12) in response to the transmission radiation (32a-c) received by the detector heads (20a-c). <IMAGE></p> |
