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.