Unigamma M is the newest multi-detector, fan beam Bone Densitometer DEXA (Dual Energy X-ray Absorptiometry) manufactured by l'acn. The 3 or 5 channels architecture allows reduced scan times and better image resolution. Moreover, the small fan-beam configuration minimizes the geometrical distortion, ever on whole body scans. For special applications, it is also possible to use the unit i a pencil-beam mode, using only the central channel