Define collimation - Study guides, Class notes & Summaries

LRA 222 Final Exam Review Latest Update 100% Pass The anode includes the: target and induction motor the cathode includes the: Filaments and focusing cup the motor that turns the anode operates through what? mutual induction with a rotating anode, the focal spot becomes a: Track the focusing cup is able to keep the electrons together because of what? like charges repel The stator is made up of electromagnets? True prepping the rotor but not making an exposure on a regular basis is related ...

Questions -- Image production (CT Bootcamp) -- Image Display Questions and Answers Rated A+ What is a pixel? A pixel is a single picture element within the digital image. Calculate the pixel size for a scan of the abdomen using a 40 cm DFOV and a 1024 x 1024 matrix. 0.039 cm or 0.39 mm 40/1024= 0.039 In the table below, indicate how the listed technical changes affect spatial resolution. Technical change --> Change in Spatial Resolution 1) Increased pixel size --> 2) Decreased matrix...

how do you reduce beam hardening correct answers 1. Increase dose 2. Reduce collimation--Reduce slice thickness 3. Increase window width At what level does the abdominal aortal bifurcate? correct answers L4 What is the typical scan delay after injection of contrast media for studies of the liver? correct answers 30-45 seconds What window settings provide the best tissue differentiation within the liver? correct answers window width= 140, level= 60 What is the window settings that p...

_______ controls quantity of the x-ray beam, and the number of x-ray photons contained in the beam - mAs _________ is the quality, and alters the amount of photons in the beam and penetrating the ability of the beam - kVp A ____% increase in kVp has the same effect on optical density as doubling the mAs. - 15% A compensating filter is used to create _____ optical density with a body part of _____ thickness. - Uniform, non-uniform A factor that affects the amount of scatter produced is a....

CT REGISTRY EXAM QUESTIONS AND ANSWERS 100% PASS how do you reduce beam hardening - Correct Answer ️️ -1. Increase dose 2. Reduce collimation--Reduce slice thickness 3. Increase window width At what level does the abdominal aortal bifurcate? - Correct Answer ️️ -L4 What is the typical scan delay after injection of contrast media for studies of the liver? - Correct Answer ️️ -30-45 seconds What window settings provide the best tissue differentiation within the liver? - Correct...

Rad 105 Exam Questions with All Correct Answers Milliamperage and Exposure time (mA and time) - Answer-Name the two primary controlling factors of quantity As the mAs is increased, the quantity of radiation reaching the IR is increased. As the mAs is decreased, the amount of radiation reaching the IR is decreased (Direct relationship, one goes up the other goes up) - Answer-Name the relationship mAs has with the quantity of x-rays produced? overall blackness - Answer-Define Radiographi...

CT REGISTRY EXAM QUESTIONS AND ANSWERS 100% PASS how do you reduce beam hardening - Correct Answer ️️ -1. Increase dose 2. Reduce collimation--Reduce slice thickness 3. Increase window width At what level does the abdominal aortal bifurcate? - Correct Answer ️️ -L4 What is the typical scan delay after injection of contrast media for studies of the liver? - Correct Answer ️️ -30-45 seconds What window settings provide the best tissue differentiation within the liver? - Correct...

CT REGISTRY GUARANTEED SUCCESS how do you reduce beam hardening ️1. Increase dose 2. Reduce collimation--Reduce slice thickness 3. Increase window width At what level does the abdominal aortal bifurcate? ️L4 What is the typical scan delay after injection of contrast media for studies of the liver? ️30-45 seconds What window settings provide the best tissue differentiation within the liver? ️window width= 140, level= 60 What is the window settings that provide the best b...

As kVp is decreased... contrast increases The speed of the film-screen combination has what relationship with density? directly proportional Grid frequency is described as the... number of lead strips per inch or centimeter The intensity of the scattered beam is 1/1000 the intensity of the primary beam at what angle 1 m from the patient? 90 degrees The minimum source-to-skin distance for fixed fluoroscopes is... 15 inches Ionization may cause... unstable ...

As kVp is decreased... contrast increases The speed of the film-screen combination has what relationship with density? directly proportional Grid frequency is described as the... number of lead strips per inch or centimeter The intensity of the scattered beam is 1/1000 the intensity of the primary beam at what angle 1 m from the patient? 90 degrees The minimum source-to-skin distance for fixed fluoroscopes is... 15 inches Ionization may cause... unstable ...