[en] Substantiated are the prospects for uses of a new type of the position sensitive detector (PSD) - an emission electroluminescent gamma chamber (EGC) - in radioisotope diagnostics. The operation principle is the following: gamma quanta emitted by the radioactive indicator pass through the collimator and interact with a dielectric layer, e.g. condensed noble gas. The Compton and photoelectrons producing ionization form electron-ion pairs in the condensed substance. In the chamber bottom - electrode electric field the electrons surmount positive ion attraction and drift to the phase interface. In the field of several kilovolts per 1 cm the electrons emit into the gaseous phase. In the gaseous phase the electrons are registered by one of the known methods (e.g., according to the gas charge in the proportional regime or using electroluminescence). The main characteristics of the present-day gamma chambers (GC) of different types are considered and the fundamental and technological difficulties of their improvement. The EGC on the basis of solid xenon are characterized by high efficiency of gamma radiation recording (close to the NaI(Tl) crystal efficiency), approximately 3% energy resolution for the 140 keV gamma quanta (like semiconducting GC); approximately 1-2 mm space resolution, possibility of detector construction of great area, utilization of the approbated data outlet and representation system (like scintillation analog GC). The defaults of such a detector are the following: necessary crystal cooling down to 160 K and temperature stabilization during its operation; necessary utilization of the special system (a reservoir) for gas storage, formed after crystal evaporation after its heating, and ensurance of high purity of the gas (the impurity concentration should be less than 10^-6)