Review Notes for the RADIOGRAPHY EXAM WITH COMPLETE SOLUTIONS 2023|2024 UPDATED RATED A+

Review Notes for the RADIOGRAPHY EXAM Appelton Reviewer A&R Question & Answer 1 Chapter 3: Radiation Protection (150 Q & Ans.) 1. The dose of radiation that will cause a noticeable skin reaction is referred to as the (A) linear energy transfer (LET). (B) source-­‐to-­‐skin distance (SSD). (C) skin erythema dose (SED). (D) source-­‐image distance (SID). ————————————————————————— v Erythema is the reddening of skin as a result of exposure to large quantities of ionizing radiation. o It was one of the first somatic responses to irradiation demonstrated to the early radiology pioneers. • The effects of radiation exposure to the skin follow a nonlinear, threshold dose-­‐ response relationship. • An individual's response to skin irradiation depends on the dose received, the period of time over which it was received, the size of the area irradiated, and the individual's sensitivity. • The dose that it takes to bring about a noticeable erythema is referred to as the skin erythema dose (SED). (Bushong, p 488) Ans. C 2. What safeguards are taken to prevent inadvertent irradiation in early pregnancy? 1. Patient postings 2. Patient questionnaire 3. Elective booking (A) 1 and 2 only (B) 1 and 3 only (C) 2 and 3 only (D) 1, 2, and 3 ————————————————————————— a) Elective booking of a radiologic examination after inquiring about the patient's previous menstrual cycle is the most effective means of preventing accidental exposure of a recently fertilized ovum. b) Patient questionnaires obtain that information from the patient and are often also used in an informed consent form. c) Patient postings in waiting and changing areas alert patients to advise the radiographer if there is any chance of pregnancy. o These three safeguards replace the earlier "10-­‐day rule," which is now obsolete. (Bushong, pp 528-­‐529) Ans. D 3. Radiographers use monitoring devices to record their monthly exposure to radiation. The types of devices suited for this purpose include the 1. Pocket dosimeter. Review Notes for the RADIOGRAPHY EXAM Appelton Reviewer A&R Question & Answer 2 2. Thermoluminescent dosimeter (TLD). 3. Optically stimulated luminescence dosimeter (OSL). (A) 1 only (B) 1 and 2 only (C) 2 and 3 only (D) 1, 2, and 3 ————————————————————————— 1.) The OSL is rapidly becoming the most commonly used personnel monitor today. 2.) Film badges and TLDs have been used successfully for years. v A pocket dosimeter is used primarily when working with large amounts of radiation and when a daily reading is desired. (Sherer et al, pp 222-­‐223) Ans. C 4. If the exposure rate to an individual standing 2.0 m from a source of radiation is 15 R/min, what will be the dose received after 2 min at a distance of 5 m from the source?