Minification gain - Study guides, Class notes & Summaries

1. Which term is defined as the ratio of the number of light photons at the output phosphor to the number of x-rays at the input phosphor? a) Brightness gain b) Flux gain c) Minification gain d) Magnification gain Answer b) Flux gain 2.All affect the brightness of the fluoroscopic image except: a) SID b) Patient size c) kVp d) mA Answer a) SID 3. The kV range typically used for fluoroscopy during myelograms is: a) 40-50 b) 50-60 c) 70-80 d) 90-110 Answer c) 70-80 4. Which po...

The brightness gained by an image intensification tube is the product of which of the following? A. Minification gain times tube distance B. Minification gain times flux gain C. Flux gain times mA D. mA time’s kVp time’s tube-to-table distance - B (Minification gain is a result of the focusing of the electron beam to a smaller output phosphor. Flux gain is the result of accelerating the electron beam through a series of electrostatic lens. Multiply the two together to get the br...

Fluoroscopy Exam Questions and Answers- Updated 2024 What is the maximum mA used when operating fluoroscopy? - Answer-The maximum mA used during fluoroscopy is 5mA or less. Despite lower mA, the patient dose is higher during fluoroscopy than it is in radiographic exams because the x-ray beam exposes the patient for a considerably longer period of time. What structure of the eye is responsible for scotopic vision? - Answer-Rods cell (almost entirely responsible for night vision) more sensi...

Fluoroscopy Questions and Answers, Graded A+ How is fluoroscopy used in angiography? To position the system for the recording of images of contrast material being injected via catheter How is fluoroscopy used in angioplasty? To provide imaging guidance for interventional procedures? Three types of fluoroscopy cameras analog vidicon, CCD or CMOS (Complementary metal-oxide semiconductor) "Real time" imaging frame rate 30 fps, about the same as old analog TVs Fluo...

Fluoroscopy question and answers rated A+ 2023 passedFluoroscopy mA range is - correct answer 0.5-5.0 During fluoroscopy the SOD cannot be less than how many inches on a mobile unit - correct answer 12 The input screen absorbs ______________ and emits _______________ - correct answer X-ray photons, light photons Electrostatic lenses are used to accelerate and focus - correct answer Electrons The photocathode absorbs ____________ and emits ______________ - correct answer Light photons...

Fluoroscopy Questions with correct Answers, Graded A+ dynamic examination Fluoroscopy is a type of ____ ____, meaning that they are live, moving x-rays Active diagnosis With fluoroscopy, the physician is present during the exam and is able to give an ____ ____. radiologist Fluroscopy is the domain of the ____. Edison Who invented the fluoroscope? 1896 When was the fluoroscope invented? GI tract studies and angiograms What are 2 types of functional studie...

Fixed mAs/ variable kVp chart - Answer adjust kVp by multiplying by 2 (+/-) for every increment of ONE centimeter or inch of size difference Fixed KVP/ variable mAs chart - Answer adjust mAs by multiplying (+) by 2 for every 4-5 centimeter or inch size difference digital image quality factors - Answer brightness, contrast resolution, spatial resolution, distortion exposure indicator, noise brightness - Answer intensity of light coming through monitor contrast resolution - Answer how ...

Fluoroscopy Questions and Answers, Graded A+ This is a dynamic radiographic exam that involves active diagnosing during the exam Fluoro What is the primary reason that fluoroscopy is the domain of the radiologist the RA and the PA Bc it involves active diagnosing Fluoro is used for studies that require Observation of dynamic physiological functions The fluoro Imaging Change consist of a Specialized x-ray tube with an image receptor call the floor scopic screen they can ...

Fluoroscopy Questions and Answers, Graded A+ Who invented fluoroscopy and when? Thomas Edison in 1896 The cones are in charge of what type of vision? Photopic/ day vision Rods are in charge of? Scotopic/ night vision Where is the x-ray tube located? Under the table Diagnostic tube factors are? 20-1000mA range (15") Fluoroscopic tube factors are? 0.5- 5.0 mA (12") Why and when did the image intensification tube come about? 1948; 500-8000 times m...

Iron is an example of a _______________ material. Ferromagnetic For trauma radiography, a radiographer could best acquire images of a lateral distal femur by: acquiring a cross-table lateral femur with a lateromedial projection Total brightness gain for the image intensifier is calculated by: flux gain multiplied by minification gain. A person with acute radiation syndrome does not demonstrate signs of illness during the ________ period. latent An adult patient h...