<prompt> A Gamma camera is used forImaging organsTo scan surface of tumorTo measure surface contaminationTo image radioactivity emitted from organs  <response>: Gamma Camera Aka Scintillation Camera or Anger Camera It is used to image gamma radiation emitting radioisotopes.This technique is known as scintigraph.Gamma camera is able to detect and make images from the very small amounts of ionising radiation emitted from patients having a nuclear medicine study.The gamma camera detects radioactive energy that is emitted from the patients body and converts it into an image.The gamma camera does not emit any radiation.The gamma camera is composed of radiation detectors, called gamma camera heads.The most common type of gamma camera is the single-headed system.it consists of a gamma camera detector mounted on a gantry that allows the camera head to be positioned in a flexible way over different regions of the patients body.Dual-headed gamma cameras are becoming increasingly popular.In these systems, two gamma camera heads are mounted onto the gantry.Also Note: SPECT involves the rotation of the gamma camera heads around the patients body to produce more detailed, three-dimensional images. 