Patient Position Monitoring Device

The present invention relates to a patient position monitoring apparatus capable of monitoring the position of the patient. Patient position monitoring apparatus according to the invention doedoe comprises a guide marker to the position guider to check the source, sensing the source emitted from the position guider and transmitting sensed information to the position guider, the position guider is the detected information the through determines whether the position changes of the guide markers. According to the invention, the position of the patient is changed, so that the source emitted from the source irradiating portion warning signal is generated is outside the area source detection unit, the user can continue to do not need to observe the patient monitor the position change of the patient. Patients, location, surveillance, investigation sources, guider, a guide marker