LESS EXPOSURE FACTOR FOR PATIENT

 Decrease current decrease Time
 Increase KVP (potential) (kilovolt potential)
If Kvp increased – speed of e increses and more energy photons are formed, thus penetrate the body creating images

INTENSIFYING SCREENS
Decreases patient exposure , but decreases film contrast
∴ contraindicated intraorally (IOPA)
- made of rare earth material QN

FACTORS DECREASING XRAY EXPOSURE TO TRACHEA
Lead apron
Thyroid collar

Position — distance rule
 6 feet away position (5 ft for cephalometry)
 How to increase the image quality – increase the distance between object & the cone
 90° - 130° angle

ALARA – As Low As Reasonably Achievable