Patent ID: 7560699

Claim:
A system for detecting emissions from an object within a body comprising: a transmission source, which produces an output transmission along a line through the body; a first detector head, which detects information from the transmission source, and also detects a emission signal from the object, said first detector head being sized to detect said transmission information from a maximum portion of 60% or less of said body at any given time, said first detector head oriented to detect information from an area defining its imaging area, and wherein said first detector head is oriented such that said area has a center and said center of said area is spaced from a central portion of said body; an orienting part which orients said body relative to the transmission source and detector head in a plurality of different orientations by rotating one of said body or said transmission source around said central portion of said body using said central portion of said body as an axis of rotation, and such that a center most portion of said imaging area of said first detector head is offset from said axis of rotation; and a processor, that forms a transmission attenuation correction map from said output transmission, and uses said transmission attenuation map to correct the information received from said emission signal, said first detector head and said processor producing output information indicative of less than all of said body, after said plurality of orientations of said orienting part, where said processor computes said transmission attenuation correction map of said body that is centered at said central portion.