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Stack #4654596
| Question | Answer |
|---|---|
| 1.Effective Dose (EfD) | A measurement of radiation exposure that estimates the overall risk to the entire body by taking into account the different sensitivities of organs and tissues using weighting factors. |
| 2. Stochastic Effects | Radiation effects that occur randomly and have no threshold, meaning any amount of radiation could cause them. The chance of occurrence increases with dose, but the severity does not (ex: cancer, genetic mutations). |
| 3.Tissue Reactions | Radiation effects that occur only after a threshold dose is reached, and the severity increases as the dose increases. These are typically seen with higher doses (ex: skin burns, cataracts). |
| 4.Radiation Safety Officer (RSO) | A trained individual responsible for developing and overseeing the radiation safety program, monitoring personnel exposure, maintaining records, and ensuring compliance with safety regulations. |
| 5.Cumulative Effective Dose | The total lifetime radiation dose a worker receives from both internal and external exposure, with a recommended limit of age × 10 mSv to help keep long-term risk at an acceptable level. |
| 6.Fluoroscopically Guided Positioning (FGP) | The use of fluoroscopy to locate the central ray before making a radiographic exposure. It is considered an unethical and unacceptable practice because it unnecessarily increases patient radiation dose and should not replace proper positioning skills. |
| 7.Entrance Skin Exposure | The amount of radiation received at the patient’s skin where the x-ray beam enters the body. It is one of the most commonly used ways to estimate patient radiation dose because it is relatively simple to determine. |
| 8.Image Gently Campaign | An initiative of the Alliance for Radiation Safety in Pediatric Imaging that promotes reducing radiation dose in pediatric imaging through improved awareness, technique adjustment, and child-specific imaging protocols. |
| 9.Air Gap Technique | A method used to reduce scattered radiation by increasing the distance between the patient and image receptor, improving image contrast without using a grid. |
| 10.Genetically Significant Dose | A measurement of radiation dose to the reproductive organs of a population, used to estimate the potential genetic impact of radiation exposure on future generations. |
| 11.Scatter Radiation | Radiation produced mainly through Compton interactions in the patient, which becomes the primary source of occupational exposure for imaging personnel. Its intensity depends on field size, kVp, and distance. |
| 12.Inverse Square Law | A principle stating that radiation intensity is inversely proportional to the square of the distance from the source, meaning small increases in distance significantly reduce exposure (ex: doubling distance reduces exposure to 1/4). |
| 13.Primary Protective Barrier | A structural barrier designed to absorb direct (primary) radiation from the x-ray beam, typically made of lead or concrete and positioned in the path of the primary beam to protect personnel and the public. |
| 14.Secondary Protective Barrier | A barrier that protects against scatter and leakage radiation, not direct beam exposure. These are used for walls and areas not directly in line with the primary beam and require less shielding than primary barriers. |
| 15.Occupancy Factor | A value used in shielding design that represents how often a specific area is occupied, helping determine how much radiation protection is needed based on the likelihood of people being present. |
Created by:
Lozano34