My 14 Year Old Daughter Has Been Diagnosed With Unidentified

My 14 year old daughter has been diagnosed with unidentified calcification deposits in her lower abdomen. She has cramping on the right side. Today she is having pain under her armpit area. She is 5'6 120 pounds and physically active.
She is scheduled for an ultrasound but her doctor indicated her blood panels are all normal and he is unsure the deposits are in her kidneys. He mentioned radiation treatment. What would that be for? I am very worried.