Minification gain - Study guides, Class notes & Summaries

Fluoroscopy- Chapter 25 question with 100% correct answers rated A+ 2023Minification Gain - correct answer the degree to which the image is minified ( made small) from input phosphor to output phosphor Flux Gain - correct answer involves using an image intensifier to create a brighter image by taking a few x-ray photons and converting that energy into many light photons Flux gain is expressed as the ratio of the number of ____ - correct answer light photons at the output phosphor to the...

Fluoroscopy mA range is Answer 0.5-5.0 During fluoroscopy the SOD cannot be less than how many inches on a mobile unit Answer 12 The input screen absorbs ______________ and emits _______________ Answer X-ray photons, light photons Electrostatic lenses are used to accelerate and focus Answer Electrons The photocathode absorbs ____________ and emits ______________ Answer Light photons, electrons The shape of the input screen helps control Answer Distortion The greater the voltage...

Principles of Imaging: Fluoroscopy question and anwers graded A+Who is credited with inventing fluoroscopy - correct answer Thomas A. Edison Identify the year fluoroscopy was invented - correct answer 1896 (year after Roentgen discovered x-rays) Type of image intensified fluoroscopic viewing systems - correct answer tv camera tube ccd (changed couple device) Increased exposure angle =(referring to section thickness) - correct answer Decreased section thickness What is the ssd for st...

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 has diffuse erythema ...

Physics of Imaging Ch. 27 Fluoroscopy Questions and Answers, Graded A+ Changing from standard in magnification mode on an image intensifier: 1. increases patient dose 2. decreases the patient dose 3. produces a magnified image 4. decreases the minification gain 1, 3, and 4 brightness gain is the product of the ____ gains minification and flux multiplying the flux gain by the minification gain in the image intensifier will equal the total brightness gain the tv camera...

Fluoroscopy Questions and Answers, Graded A+ luminsence emission of light due to outside stimulation fluorescence light during stimulation phosphorescence light that continues to be emitted after stimulation fluoroscopy ________: process of using a fluoroscope for examining internal movement of structures and fluids. fluorescence, thomas edison History - __________: LEAD TO X-RAY DISCOVERY - Roentgen - barium platinocyanide - _____ ________ 1896 discovered th...

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...

Electrons from the photocathode are concentrated and directed toward the other end of the image-intensifier tube by a series of ________ and by ________ kVp applied through the tube. - CORRECT ANSWER 1) Electrostatic Lenses (Focusing Lenses) 2) 25 Once electrons are propelled across the tube from the photocathode, they strike the ________. - CORRECT ANSWER Output Phosphor Once the energy of the electrons hits the output phosphor, it is converted by the phosphor to ________ in amount...

What is the milliamperage used during fluoroscopy? Answer 5 mA (During fluoroscopy, the x-ray tube is operated at less than 5 mA.) The image intensifier improved fluoroscopy by increasing image _____. Answer brightness The _____ in the retina are stimulated by _____ light; the _____ are stimulated by _____ light. Answer rods, low; cones, bright The output phosphor of the image intensifier is composed of _____. Answer cesium iodide The input phosphor converts _____ to _____. Answer ...

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...