 Show Copyright © 2022, Elsevier Inc. All rights reserved. 1 Chapter 04: Radiation Protection Iannucci: Dental Radiography, 6th Edition MULTIPLE CHOICE 1. Which of the following should you do prior to taking x-rays to protect your patient from radiation exposure? a.Proper film processing b.Proper prescribing of radiographs c.A lead apron d.A thyroid collar ANS: B Proper film processing is an example of a patient protection technique used after x-ray exposure. Proper prescribing of radiographs is an example of a patient protection technique used before x-ray exposure. A lead apron is an example of a patient protection technique used during x-ray exposure. A thyroid collar is an example of a patient protection technique used during x-ray exposure. DIF: Application REF: Page 31 OBJ: 2 TOP: CDA, RHS, III.C.3. Identify ways to reduce x-radiation exposure to patients (ALARA) MSC: NBDHE, 2.2 Principles of Radiologic Health 2. The <Guidelines for Prescribing Dental Radiographs= state that a. dentulous adult recall patients at increased risk for caries should have posterior bite-wing examinations at 12- to 24-month intervals. b.x-rays are not taken on patients who are pregnant unless absolutely necessary. c.edentulous adults should have posterior bite-wing examinations at 12- to 36-month intervals. d.dentulous adult recall patients who are not at increased risk for caries should have posterior bite-wing examinations at 24- to 36-month intervals. ANS: D Dentulous adult recall patients at increased risk for caries should have posterior bite-wing examinations at 6- to 18-month intervals. The recommendations for prescribing radiographs do not need to be altered for pregnancy. Edentulous adults do not need bite-wing radiographs. The <Guidelines for Prescribing Dental Radiographs= state that dentulous adult recall patients who are not at increased risk for caries should have posterior bite-wing examinations at 24- to 36-month intervals. DIF: Recall REF: Page 31 | Page 32 OBJ: 9 TOP: CDA, RHS, III.A. Identify current ADA guidelines for frequency of exposure to radiation MSC: NBDHE, 2.2 Principles of Radiologic Health 3. Inherent filtration in the dental x-ray tubehead a.includes filtration that takes place when the primary beam passes through the glass window of the x-ray tube, the insulating oil, and the tubehead seal. b.includes the placement of aluminum discs in the path of the x-ray beam between the collimator and the tubehead seal. c.alone meets the standards regulated by state and federal law. d.is equivalent to approximately 5.0 mm of aluminum. ANS: A Inherent filtration in the dental x-ray tubehead includes filtration that takes place when the primary beam passes through the glass window of the x-ray tube, the insulating oil, and the tubehead seal. Added filtration includes the placement of aluminum discs in the path of the x-ray beam between the collimator and the tubehead seal. Inherent filtration alone does not meet the standards regulated by state and federal law. Inherent filtration is equivalent to approximately 0.5 to 1.0 mm of aluminum. DIF: Recall REF: Page 31 OBJ: 3 TOP: CDA, RHS, III.B.3. Demonstrate understanding of x-ray machine factors that influence radiation safety MSC: NBDHE, 2.2 Principles of Radiologic Health 4. Added filtration in the dental x-ray tubehead a.refers to the placement of tungsten discs in the path of the x-ray beam between the collimator and the tubehead seal. b.filters out shorter-wavelength x-rays from the x-ray beam. c.results in a lower-energy beam. d. results in a more penetrating useful beam. ANS: D Added filtration refers to the placement of aluminum discs in the path of the x-ray beam between the collimator and the tubehead seal. Added filtration filters out longer wavelength x-rays from the x-ray beam. Added filtration results in a higher energy beam. Added filtration in the dental x-ray tubehead results in a more penetrating useful beam. DIF: Recall REF: Page 31 | Page 34 OBJ: 3 TOP: CDA, RHS, III.B.3. Demonstrate understanding of x-ray machine factors that influence radiation safety MSC: NBDHE, 2.2 Principles of Radiologic Health What concept states that all exposure to radiation must be kept to a minimum?The guiding principle of radiation safety is “ALARA”. ALARA stands for “as low as reasonably achievable”. ALARA means avoiding exposure to radiation that does not have a direct benefit to you, even if the dose is small.
What is the MPD for an occupationally exposed pregnant woman?Standards for Protection Against Radiation that the dose equivalent to the fetus due to occupational exposure of a declared pregnant worker be kept below 500 mrem (5 mSv) during the pregnancy.
Which type of PID would be most effective in reducing patient exposure?The important thing to remember is, a longer cone or PID will provide a more accurate and diagnostic image with reduced radiation exposure for the patient and the operator than a shorter PID. Some PIDs may be rectangular in shaped rather than round.
What is the maximum diameter of a circular PID?Specifically, federal regulations require internal and external cylindrical collimators to restrict the intraoral X-ray beam exiting the position-indicating device (PID) to a diameter of no more than 2.75 inches (7 cm) on the patient's skin.
|
The primary dictum of operator protection guidelines is that the operator must
zusammenhängende Posts
Urheberrechte © © 2024 de.apacode Inc.
