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A series of multiple-choice questions and answers related to the operation and safety of fixed fluoroscopy units. It covers topics such as image quality, radiation exposure, equipment settings, and safety protocols. The questions address key aspects of fluoroscopy, including the advantages of fixed systems, radiation-induced burns, factors affecting patient dose, and image processing techniques. It is designed to test and reinforce knowledge of fluoroscopy procedures and safety measures, making it a valuable resource for students and professionals in radiology. Useful for exam preparation and understanding the principles of fluoroscopy. It includes questions about radiation safety, image intensifiers, and equipment configurations. The content is structured to help users quickly assess their knowledge and identify areas for further study. It is a practical tool for anyone involved in fluoroscopy, providing a concise review of essential concepts and best practices.
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Advantages of fixed fluoroscopy systems over mobile fluoroscopy units include:
The acute form of radiation dermatitis results from an exposure of _____ Gy. A) 1- B) 2- C) 3- D) 4-10 - correct answer ✅B) 2- Which factors does the generator alter to maintain the appropriate entrance exposure at the image receptor that minimize patient entrance dose?
Spectral beam filters reduce dose by decreasing low- energy radiation. A 2.0-mm copper filter reduces the dose by _____ %. A) 60 B) 65 C) 70 D) 75 - correct answer ✅C) 70 For fluoroscopy tables, _____ support pads may be acceptable, but _____ pads have been reported to result in excessive attenuation. A) thin foam; thick gel B) thick gel; thin foam C) thick foam; thin gel D) thin foam; thin gel - correct answer ✅A) thin foam; thick gel Grid ratios for fluoroscopy systems range from 6:1 to 10:1, lower than the radiographic range of 8:1 to 16:1. A) True
B) False - correct answer ✅A) True Which part of the image intensifier converts x-rays to electrons? A) electron lenses B) input layer C) output layer D) anode - correct answer ✅B) input layer Three to five magnification modes usually are available on most image intensifiers, and dose typically _____ with greater magnification. A) increases B) decreases C) remains unchanged D) decreases exponentially - correct answer ✅A) increases The acquisition, or cine, mode should be used sparingly because about _____ times more radiation
A) undertable x-ray tube. B) overtable x-ray tube. C) ceiling-mounted C-arm. D) floor-mounted C-arm. - correct answer ✅A) undertable x-ray tube. For cardiac catheterization, the ceiling-mounted C-arm should be positioned with the _____ located on the patient's right and the _____ on the patient's left to minimize magnification of the heart. A) television monitor; image intensifier B) television monitor; x-ray tube C) x-ray tube; image intensifier D) image intensifier; x-ray tube - correct answer ✅C) x-ray tube; image intensifier Grid removal may reduce patient dose by a factor of _____ or more. A) 2 B) 3
correct answer ✅A) 2 Some fluoroscopy units contain in-pulse control technology that adjusts exposure settings in real time. The operator selects parameters such as _____ and _____ before fluoroscopy exposure takes place and the in-pulse control alters the beam's penetration. A) patient size; exam type B) patient size; patient age C) patient age; exam type D) exam type; exam date - correct answer ✅A) patient size; exam type During fluoroscopy, the image intensifier should be as close to the patient as possible to:
correct answer ✅C) 28 When imaging the stomach and small intestine, the exposure time should be no longer than _____ seconds for patients with normal peristaltic activity and _____ seconds or less if the patient has hypermotility. A) 0.5; 0. B) 0.4; 0. C) 0.3; 0. D) 0.2; 0.1 - correct answer ✅D) 0.2; 0. According to the ACR practice guidelines, the basic requirements for _____ procedures include high-quality fluoroscopic imaging equipment, film or digital records of the examination, a tilt table that is capable of inclining the head -30° downward and a proper support device for securing the patient on the tilt table. A) gastrointestinal B) myelography
C) cardiac catheterization D) percutaneous needle biopsy - correct answer ✅B) myelography Which of the following steps usually occurs first in digital subtraction angiography? A) subtracting the mask image from the contrast image B) acquiring the mask image C) demonstrating the vessels of interest D) injecting a contrast medium - correct answer ✅B) acquiring the mask image Which of the following structures is most vulnerable to radiation damage during cerebral angiography? A) ear B) eye C) larynx D) parotid - correct answer ✅B) eye
