Radiation protection in medical radiography 7th edition

1. Some consequences of ionization in human cells include: 1. creation of unstable atoms. 2. production of free electrons. 3. creation of reactive free radicals capable of producing substances poisonous to the cell. a. 1 only b. 2 only c. 3 only d. 1, 2, and 3 ANS: D REF: 2 2. Which of the following is a special form of radiation that is capable of creating electrically charged particles by removing orbital electrons from the atom of the material with which it interacts? a. Ionizing radiation b. Nonionizing radiation c. Subatomic radiation d. Ultrasonic radiation ANS: A REF: 2 3. Patients who have an understanding of the medical benefits of an imaging procedure because they received factual information about the study before having the examination are more likely to: a. assume a small risk of biologic damage but not overcome any radiation phobia they may have. b. cancel their scheduled procedure because they are not willing to assume a small risk of biologic damage. c. overcome any radiation phobia but not assume a small risk of possible biologic damage. d. overcome any radiation phobia and be willing to assume a small risk of possible biologic damage. ANS: D REF: 8 4. The millisievert (mSv) is equal to: a. 1/10 of a sievert. b. 1/100 of a sievert. c. 1/1000 of a sievert. d. 1/10,000 of a sievert. ANS: C REF: 9 5. The advantages of the BERT method are: 1. it does not imply radiation risk; it is simply a means for comparison. 2. it emphasizes that radiation is an innate part of our environment. 3. the answer given in terms of BERT is easy for the patient to comprehend. a. 1 and 2 only b. 1 and 3 only c. 2 and 3 only d. 1, 2, and 3 ANS: D REF: 9 6. If a patient asks a radiographer a question about the potential risk of radiation exposure associated with a specific x-ray procedure, the radiographer should: a. use his or her intelligence and knowledge to answer the question honestly and provide a suitable example that compares the amount of radiation received from the procedure in question with natural background radiation received over a given period of time. b. avoid the patient’s question by changing the subject. c. tell the patient that it is unethical to discuss such concerns. d. refuse to answer the question and recommend that he or she speak with the referring physician. ANS: A REF: 9 7. Which of the following is the intention behind the ALARA concept? a. To keep radiation exposure and consequent dose at the highest possible level b. To keep radiation exposure and consequent dose at an average level c. To keep radiation exposure and consequent dose at the lowest possible level d. To avoid the use of ionizing radiation in radiologic practice ANS: C REF: 5