An imaging device comprising: an arcuate arm having a first end , a second end , and an axis , the arcuate arm comprising an outer surface defining an outer arc around the axis and an inner surface defining an inner arc around the axis , the outer surface and inner surface both extending from the first end to the second end ; a support arm configured to support the arcuate arm and to rotate the arcuate arm about the axis ; a track extending along the arcuate arm ; a source movably disposed on the track and operable to generate signals useful for imaging; and a detector movably disposed on the track , the detector operable to detect signals generated by the source ; wherein movement of the source and detector along the track , coupled with rotation of the arcuate arm about the axis , enables the source and detector to travel at least 360 degrees about the axis , characterized in that : the outer arc has an arc measure between 270 degrees and 350 degrees, and the imaging device further comprises a trolley movably disposed on the track , the trolley extending between a third end, of the trolley, proximate the first end and a fourth end, of the trolley, proximate the second end , wherein the source and the detector are fixedly secured to the trolley between the third end and the fourth end, the third end never passes the first end , and the fourth end never passes the second end . an arcuate arm having a first end , a second end , and an axis , the arcuate arm comprising an outer surface defining an outer arc around the axis and an inner surface defining an inner arc around the axis , the outer surface and inner surface both extending from the first end to the second end ; a support arm configured to support the arcuate arm and to rotate the arcuate arm about the axis ; a track extending along the arcuate arm ; a source movably disposed on the track and operable to generate signals useful for imaging; and a detector movably disposed on the track , the detector operable to detect signals generated by the source ; wherein movement of the source and detector along the track , coupled with rotation of the arcuate arm about the axis , enables the source and detector to travel at least 360 degrees about the axis , characterized in that : the outer arc has an arc measure between 270 degrees and 350 degrees, and the imaging device further comprises a trolley movably disposed on the track , the trolley extending between a third end, of the trolley, proximate the first end and a fourth end, of the trolley, proximate the second end , wherein the source and the detector are fixedly secured to the trolley between the third end and the fourth end, the third end never passes the first end , and the fourth end never passes the second end . the outer arc has an arc measure between 270 degrees and 350 degrees, and the imaging device further comprises a trolley movably disposed on the track , the trolley extending between a third end, of the trolley, proximate the first end and a fourth end, of the trolley, proximate the second end , wherein the source and the detector are fixedly secured to the trolley between the third end and the fourth end, the third end never passes the first end , and the fourth end never passes the second end . <EOS>