California Fluoroscopy Test with correct answers 100%

California Fluoroscopy Test with correct answers 100% Which of the following materials are used in the construction of a fluoroscopic tabletop? 1. Lead 2. Aluminum 3. Bakelite 4. Carbon fiber - Correct Answer 2, 3, and 4 Geometric factors in the shape of the image intensification tube b. Focal-film-distance (FFD) c. Object-to-image distance (OID) d. Minification gain - Correct Answer ... If the entrance skin dose is measured from the surface of the tabletop, the x-ray source is located: a. either over or under the table b. under the table c. over the table d. not enough information provided - Correct Answer b. Under the table The mottle level of an image can be adjusted by: 1. changing mA 2. changing kVp 3. changing the exposure factors 4. increasing the number of available x-ray photons - Correct Answer All of the above Why is it important to coordinate the video signal between the TV camera and the TV monitor? a. To amplify the video signal appropriately b. To avoid unnecessary screen lag in the television picture c. To avoid unnecessary flicker in the television picture d. So that no exposure is made between frames - Correct Answer To avoid unnecessary flicker in the television picture How does the focal spot size of fluoroscopic x-ray tube differ from a radiographic x-ray tube? a. Often designed with a smaller focal spot b. Often designed with a larger focal spot c. No difference in focal spot size - Correct Answer Often designed with a smaller focal spot The best recorded resolution is obtained with use of: a. Video tape recording b. Spot films using conventional cassettes c. Spot films using a spot film camera d. Video disc recording - Correct Answer Spot films using conventional cassettes The total filtration used in fluoroscopic x-ray tubes operating above 125 kVp must be a least: a. 2.5 mm Al equivalent b. 0.5 mm Al equivalent c. 3.0 mm Al equivalent d. 1.0 mm Al equivalent - Correct Answer 3.0 mm Al equivalent Fluoroscopy is defined as a radiological examination utilizing ___ for observation of the transient mage. a. phosphorescence b. luminescence c. radiation d. fluorescence - Correct Answer fluorescence The optimum source-to-skin distance is ___ for stationary fluoroscopic equipment and ___ for mobile fluoroscopy equipment. a. 30 cm, 45 cm b. 12 cm, 18 cm c. 18 cm, 12 cm d. 45 cm, 30 cm - Correct Answer 45 cm, 30 cm When referring to a lens system, a higher 'f-number' will result in less ___ being available to form an image on cine film. a. Contrast b. Quantum mottle c. Resolution d. Light - Correct Answer b. Light Two minutes of actual fluoroscopic exposure time during a UGI Fluoro study could deliver a skin entrance exposure to the patient ranging from: a. 5 - 15 rads b. Over 15 rads c. 5 - 10 rads d. 2 - 5 rads - Correct Answer 5 - 15 rads "radiation area" is an area in which there exists radiation levels that could result in an individual receiving a dose equivalent in excess of ___ in one hours at 30 cm form the radiation source. a. 0.1 rem (1 mSv) b. 1.0 rem (10 mSv) c. 5 rems (50 mSv) d. 0.005 rem (0.05 mSv - Correct Answer 0.005 rem (0.05 mSv Why is the dose reading at a single anatomic point not expressive of the total somatic effect? a. Use of protective shielding and/or natural shielding b. X-ray beam is restricted to anatomical area of interest c. Doses are not uniformly distributed throughout the body d. All listed answers - Correct Answer All listed answers A dose to the skin is most likely a good indicator of the: a. Dose to the underlying bone marrow b. Dose to the lens of the eyes c. Dose to the underlying gonads d. Level of dose received by organs near the point of interest - Correct Answer Level of dose received by organs near the point of interest No individual member of the public may receive ___ in any one hour in an unrestricted area? 1. 2 rems 2. 2 mrems 3. 0.002 rems 4. 200 rems - Correct Answer 2 and 3 For the average fluoroscopy exam the ESE is a. 8 R/min b. 4 R/min c. 25 R/hr d. 40 R/hr - Correct Answer b. 4 R/min Which type of personnel monitoring devices discharges a capacitor when in the presence of ionizing radiation? a. Pocket chamber b. Film badge c. Audible warning device d. TLD - Correct Answer Pocket chamber Ionizing radiation when coming in contact with cells can: a. Kill the cell b. Pass through a cell without producing any damage c. Damage the cell, but such damage could be adequately repaired d. All listed answers - Correct Answer All listed answers What is the primary objective in establishing dose limit values for occupational exposures? a. To prevent radiation exposures b. To identify the area where an adverse effect will occur c. To reduce occupational exposures d. To keep exposure well below a level that would cause an adverse effect to occur during the lifetime of the radiation worker - Correct Answer To keep exposure well below a level that would cause an adverse effect to occur during the lifetime of the radiation worker As shown in animal experiments, deleterious effects to the embryo may be produced with doses of as little as ___ delivered to the embryo. a. 10 rads b. 5 rads c. 50 rads d. 30 rads - Correct Answer 10 rads GSD ___ a prediction or forecast of adverse effects on any individuals or their unborn child. a. is b. is not c. can be d. None of the above - Correct Answer is not What type of personnel monitoring device is used when immediate reading is desired or needed? a. TLD b. Film badge c. Pocket chamber