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Ch 38 bushong
Radiation Protection
| Question | Answer |
|---|---|
| What type of switch is the fluoro exposure control switch? | dead man |
| What is primary radiation? | the useful beam |
| How accurate must the collimator light be to the SID? | within 2% |
| What is the leakage radiation limits for the tube @ 1 m from the housing? | 100 mR/hr |
| What must the control panel show? | beam on time (or how long the radiation is being produced) |
| What is the minimum requirement for filtration at 50 to 70 kVp range? | 1.5 mm of al |
| What is the minimum requirement of filtration at 70 or above kVp? | 2.5 mm of al |
| The PBL must be accurate to ______ % of the SID. | 2 % |
| What is the primary protective barrier for the fluoro tube? | The image intensifier itself! |
| How much lead must cover the bucky slot opening in the table? | at least .25 mm of lead |
| The intensity of scatter radiation 1 m from the patient should be about _______ % of the intensity of the useful beam? | .1 % |
| ______ ______ is that radiation that is emitted from the tube housing in all directions, other than the useful beam. | leakage radiation |
| What should the SSD be on stationary fluoro equipment? | 38 cm |
| Variations in x-ray intensity reproducibility should not exceed ____________ %. | 5% |
| What must the total filtration of the fluoro beam be? | at least 2.5 mm of al |
| When the output radiation intensities should be constant from one exposure to another? | reproducibility |
| When adjacent mA stations are used, the output intensity should remain the same? | linearity |
| How much lead should a protective curtain contain? | .25 mm of lead |
| How much lead must be contained in the imaging intensifier receptor? | 2mm of lead |
| For automatic collimation devices, an underexposed border should be visible _____________. | at all heights! |
| What is the cumulative timer used for? | let the radiologist know that 5 min has gone by |
| At 80 kVp, the intensity of the x-ray beam at the tabletop level of a fluoroscope should not exceed ________/min. | 2.1 R |
| What is more sensitive, precise to 1mrad and has a wide dynamic range? | OSL optically stimulated dosimeter |
| ________ is a quantity that reflect both the volume of tissue irradiated and the dose received? | DAP dose area product |
| A ________ area can occupy anyone. | uncontrolled |
| A __________ area is occupied primarily by radiology personnel and patients. | controlled |
| What type of radiation detector is based on the ionization of gas? | Gas filled detector |
| The ________ ________ is the basis for the gamma camera in nuclear medicine and is also used in CT. | scintilliation detector |
| Instrument designed to measure the accumulation of intensity of radiation? | dosimeters |
| This type of detector can differentiate between alpha and beta particles. | proportional counter |
| This type of detector is difficult to calibrate and can measure a single ionizing event? | geiger-muller counter |
| This type of detector is reusable, and responds proportionally to the dose? | TLD thermoluminescent dosimeter |
| Any wall to which the primary beam can be directed is designated a ________________. | primary protective barrier |
| The control console is considered a _________ barrier? | secondary protective |
| What are the 3 types of radiation? | primary, scatter, leakage |
| What is the secondary barrier designed to do? | absorb scatter and leakage radiation |
Created by:
radgirl37
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