Dental Radiography - Unit 314 Diploma Questions With Correct Solutions, Already Passed!!

Ionising Radiation - Answer-Type of electromagnetic radiation that possesses energy, capable of passing through matter such as human tissue What happens when x-rays pass or hit the atoms of the matter? - Answer-They are: Unaltered, Scattered, Absorbed Radiopaque - Answer-Substances of greater density that absorb x-rays and appear in shades of white on film Radiolucent - Answer-Substances of less density that allow x-rays to pass through and appear dark on radiographs Scattered radiation - Answer-Radiation that bounces off tissue cells during exposure in an uncontrolled manner, thereby increasing the actual radiation dose Collimator tube - Answer-A rectangular tube that produces a parallel x-ray beam reducing scatter Justification - Answer-The decision that the dental image is required to enable diagnosis and treatment to proceed, and that the benefits will outweigh the risks of being exposed to ionising radiation Optimisation - Answer-The principle of ALARA/P, so that the minimum dose of radiation is given for the minimum exposure time ALARA/ ALARP - Answer-As low as reasonably achievable/possible Ionising Radiation Regulations 1999 - IRR99 - Answer-Concerned with the safety of staff and the correct functioning of the radiation equipment Ionising Radiation Medical Exposure Regulations 2000 - IRMER 2000 - Answer-Concerned with the safety of patients and their protection during exposure to ionising radiation