1. A ring detector radiological image acquisition system, comprising: a plurality of detector modules arranged in a ring configuration, with each detector module comprising a plurality of bar detector strips made of scintillating material, arranged in a stack configuration, at least one photodetector coupled to at least one side of said stack, and a slat collimator including a plurality of elongated slats, for collimating each of said plurality of bar detector strips to receive gamma photons in only a single dimension; each of said plurality of detector modules having a central axis and being controlled to spin about its central axis in a synchronized manner with the others of said plurality of detector modules, such that radiological image information sufficient to construct a clinically significant image is acquired from a subject located substantially in the center of said ring configuration simultaneously by said plurality of detector modules without rotation of said ring.