The DGA Focused, or Azimuthal Gamma tool is a Tungsten collimated version of the NGT-T tool.
It is mechanically and electrically identical to the NGT-T, except for the weight.
A window is machined along the length of the Tungsten shield that surrounds the detector.
Only gamma rays entering from the formation through this window can be detected and counted.
When aligned with the tool face or other physical reference, the DGA indicates the direction from which gamma radiation originates within an angle of 50 degrees.
