RTBC RADIATION UNITS OF MEASUREMENT QUESTIONS ANSWERED CORRECTLY LATEST UPDATE

RTBC RADIATION UNITS OF MEASUREMENT QUESTIONS ANSWERED CORRECTLY LATEST UPDATE How does increasing milliampere-seconds (mAs) affect the exposure of the x-ray beam? - Answers Exposure increases How does decreased kilovoltage peak (kVp) affect the absorbed dose to the patient? - Answers Absorbed dose decreases Assuming that all other factors remain constant, when the distance between the x-ray source and radiographer increases, the effective dose to the radiographer will: - Answers Decrease Which three of the following is a quantity of radiation in tissue? (Select three) - Answers - Effective dose - Absorbed dose - Equivalent dose Which of the following measures the ionization produced in the air? - Answers Exposure Which of the following radiation measurements are used to quantify the risk of long-term radiation injuries, such as cancer? - Answers Effective dose Radiation that escapes the protective housing of the x-ray tube is known as: - Answers Leakage Which of the following is considered primary radiation? - Answers Radiation that exits the window in the tube housing Effective dose is a measurement that can be used to evaluate the risks of: - Answers Long-term radiation effects Radiation workers should try to keep their occupational dose to a minimum. Which of the following adjustments would decrease the absorbed dose to a radiation worker? - Answers Increase distance from the source When measuring the intensity of the primary beam, what dosimeter position will demonstrate the highest air KERMA? - Answers 80 cm from the x-ray tube When measuring the quantity of scatter radiation during a fluoroscopy procedure, what dosimeter position will demonstrate the lowest exposure rate? - Answers 3 meters from the patient The primary by-product of x-ray interactions in air is: - Answers Free electrons What is the process through which x-rays create charged particles such as free electrons? - Answers Ionization Exposure is a radiation measurement used to quantify which of the following? - Answers Absolute number of ionization events in air Which of the following best describes radiation exposure? - Answers Quantity of radiation directed at the patient Air KERMA is a radiation measurement that describes the: - Answers Kinetic energy absorbed by ions in air What units are used to measure exposure? - Answers Coulombs per kilogram (C/kg) If the intensity of the x-ray beam increases, how are exposure and air KERMA affected? - Answers Exposure increases and air kerma increases Which two of the following technical changes will decrease the air KERMA measured in the primary beam? (Select two) - Answers - Decrease milliamperage (mA)