[en] The final configuration of our small gamma-camera for medical applications is presented. Emphasis has been put on low cost and portability. The camera, based on a scintillator crystal and a position-sensitive photomultiplier tube, has a useful field of view of 4.6 cm diameter and provides around 2 mm of intrinsic spatial resolution. In its final configuration, the camera weights less than 2 kg and the collimator is of the pinhole type. The camera is only connected through a single USB cable to a portable PC. It images small organs with high efficiency as proven with patients at the hospital

[en] We have assembled a new device which consists of a small gamma camera combined with a surgical navigator. We call this new instrument the 'gamma functional navigator'. The small gamma camera has been built by our group and has an spatial resolution of about 2 mm. We use this gamma camera to visualize small organs. The position of the gamma camera is determined by the navigator through infrared emitters, which also localize the surgical instruments. A software program combines the images obtained by the gamma camera at different places to form at least an stereoscopic image of an organ. We have tested the gamma functional navigator with different phantoms and with a few clinical cases for sentinel gland detection and surgery