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RADT 465 Safety
ARRT registry review covering safety
| Question | Answer |
|---|---|
| The uppermost collimator shutter functions to eliminate | Off-focus radiation (Lange Q&A p.113) |
| Somatic effects of radiation refer to effects that are manifested | During the life of the exposed individual (Lange Q&A p.113) |
| Increasing field size, while leaving technical facts unchanged, will | Increase the DAP (Lange Q&A p.114) |
| How are kV and HVL related? | Directly (Lange Q&A p.114) |
| Diagnostic x-radiations are correctly described as | A low energy, low LET (Lange Q&A p.114) |
| A thermoluminescent dosimetry system uses which crystal? | Lithium fluoride (Lange Q&A p.115) |
| The degree of x-ray attenuation is directly related to what quality of the radiographed part? | Atomic number (Lange Q&A p.115) |
| An increase in total filtration of the x-ray beam will increase what? | Beam HVL (Lange Q&A p.115) |
| What is the minimum lead requirement for lead, aprons, according to the NCRP? | 0.05mm Pb equivalent (Lange Q&A p.116) |
| Any wall that the useful x-ray beam may be directed toward must be a | Primary barrier (Lange Q&A p.116) |
| The annual dose limit for occupational exposed individuals is valid for | Beta, x-, and gamma radiations (Lange Q&A p.116) |
| The skin response to radiation exposure that appears as hair loss is known as | Epilation (Lange Q&A p.117) |
| What unit of measure is used to express ionizing radiation dose to biological material | Sv (Lange Q&A p.117) |
| The reduction in the intensity of an x-ray beam as it passes through material is termed what? | Attenuation (Lange Q&A p.117) |
| Late effects of radiation, whose incidence is dose related and for which there is no threshold dose, are called | Stochastic/probabilistic (Lange Q&A p.117) |
| The largest amount of diagnostic x-ray absorption is most likely to occur in which tissues | Bone (Lange Q&A p.118) |
| In the production of characteristic radiation at the tungsten target, the incident electron does what? | Ejects an inner-shell tungsten electron (Lange Q&A p.118) |
| Primary radiation barriers must be at least how high? | 7 feet (Lange Q&A p.118) |
| According to the NCRP, the annual occupational dose-equivalent limit to the thyroid, skin, and extremities is | 500 mSv (Lange Q&A p.119) |
| The NCRP recommends an annual effective occupational whole-body dose-equivalent limit of | 50 mSv (Lange Q&A p.119) |
| The amount of time that x-rays are being produced and directed toward a particular wall is called the | Use factor (Lange Q&A p.119) |
| Which cell type has the greatest radiosensitivity in the adult human? | Lymphocytes (Lange Q&A p.119) |
| The unit of measurement used to express occupational exposure is | Sv (Lange Q&A p.120) |
| The most effective type of shield for anterior and lateral male gonadal protection during fluoroscopy? | Shaped contact (contour) (Lange Q&A p.120) |
| Isotopes are atoms that have the same | Atomic number but a different mass number (Lange Q&A p.120) |
| Primary radiation barriers usually require which thickness of lead shielding? | 1/16 inch lead equivalent (Lange Q&A p.121) |
| The SSD in mobile fluoroscopy must be | A minimum of 30 cm (Lange Q&A p.121) |
| What is the automatic exposure device that is located immediately under the x-ray table is the | Ionization chamber (Lange Q&A p.121) |
| What is the effect on RBE as LET increase? | As LET increases, RBE increases (Lange Q&A p.121) |
| The photoelectric effect is an interaction between an x-ray photon and | An inner-shell electron (Lange Q&A p.122) |
| In the production of Bremsstrahlung radiation | The incident electron is deflected, with resulting energy loss (Lange Q&A p.122) |
| The purpose of filters in a film badge is | To measure radiation quality (Lange Q&A p.122) |
| Aluminum filtration has its greatest effect on | Low-energy x-ray photons (Lange Q&A p.123) |
| As field size decreases | DAP decreases (Lange Q&A p.123) |
| The least radiosensative stage of human cell mitosis is | S (Lange Q&A p.125) |
| The term used to express kinetic energy released in matter is | Kerma (Lange Q&A p.125) |
| The dose of radiation that will cause a noticeable skin reaction is called the | SED (Lange Q&A p.126) |
| Which type of monitoring device does photons release electrons by their interaction. with air? | Pocket dosimeter (Lange Q&A p.126) |
| The primary function of filtration is to reduce | Patient skin dose (Lange Q&A p.127) |
| What quantity of radiation exposure to the reproductive organs is required to cause temporary infertility? | 1Gy (Lange Q&A p.127) |
| The deviation index (DI) indicates exposure data | To the IR (Lange Q&A p.128) |
| Which personnel radiation monitors uses bluetooth technology? | DIs (Lange Q&A p.127) |
| Radiation output from a diagnostic x-ray tube is measured in which of the following units of measurement? | Air kerma (Lange Q&A p.129) |
| What percentage of the SID must the collimator light and actual irradiated area be accurate? | 2% (Lange Q&A p.129) |
| The target theory applies to | DNA molecule (Lange Q&A p.129) |
| The interaction between ionizing radiation and the target molecule that is most likely to occur is the | Indirect effect (Lange Q&A p.130) |
| The most radiosensative portion of the GI tract is the | Small bowel (Lange Q&A p.130) |
| The production of x-ray photons by the sudden deceleration of high-speed electrons is termed | Bremsstrahlung (Lange Q&A p.131) |
| The dose area product (DAP) meter is generally placed | Below the collimators (Lange Q&A p.131) |
| The required thickness of a primary barrier is usually expressed as | 1.6mm (1/16 inch) Pb (Lange Q&A p.131) |
| The protective curtain used during fluoroscopic procedures must have a lead equivalent of at least what thickness? | 0.25mm (Lange Q&A p.123) |
| How is effective dose calculated? | Efd=WrxWtxD (Lange Q&A p.132) |
| How are wavelength and energy related? | Inversely (Lange Q&A p.132) |
| What is the established monthly fetal dose-limit guideline for pregnant radiographers? | 0.5mSv (Lange Q&A p.133) |
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