file:JbInside.jpg|A picture of the inside of the active collimator. The tungsten pin cushions are secured onto the boron-nitride insulating cup. Another four tungsten pin cushions will be installed to make a "four-leafed clover" (for lack of a better analogy) shape inside the collimator. | file:JbInside.jpg|A picture of the inside of the active collimator. The tungsten pin cushions are secured onto the boron-nitride insulating cup. Another four tungsten pin cushions will be installed to make a "four-leafed clover" (for lack of a better analogy) shape inside the collimator. |