Fov - Samenvattingen, Aantekeningen en Examens

Nuclear Medicine Final Exam corBasic Gamma Camera Components -ANSWER Collimator, NaI scintillation crystal, light guide, PMT array How does the collimator work? -ANSWER Controls which gamma rays are accepted by absorptive collimation, forming a projected image of the distribution on the surface of the crystal. What information do event signals contain? -ANSWER Position and energy information (could also contain time information). Reflective Material Around Crystal -ANSWER Maximizes ligh...

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...

ARMRIT Exam Tested Questions With Revised Correct Answers | Updated & Already Passed | When selecting only one slice at a time during a pulse sequence, which method for providing spatial localization is employed? - ANSWER : 2DFT Tissues that have low (short) relaxation times have: - ANSWER : Higher relaxation rates For the following spin-echo protocol: FOV: 320 / TR: 500 / TE: 25 / SliceThick: 5mm / Slice Gap: 1mm/ Slice#: 9 / NEX: 4 / Matrix: 192 -- Increasing Matrix will: ...

Assuming all other parameters are the same, an echo time of _________ ms provides the best Signal-to-Noise Ratio. correct answers15 Fat has a ______ T1 relaxation time and a ____ T2 relaxation time correct answersShort and Short Water has a ____ T1 relaxation time and a ____ T2 relaxation time correct answersLong and Long If the repetition time is doubled, the scan time will correct answersDouble: TR is directly porpotional to scan time (TR x Phase Matrix x NEX) Which of the followin...

Phase mismapping: Appearance - correct answer -AKA ghosting. produces replications of moving anatomy across the image in the phase direction. Usually occurs from anatomy that moves periodically (respirations, blood flow, swallowing, eye movement). Is phase mismapping/ghosting more or less apparent further from the source? - correct answer -Less apparent. What is the calculation for separation between ghosts? - correct answer -S(p)= scan time (TR, phase matrix, NEX) divided by the p...

CAMRT-MRI In Practice chapter 8 Artifacts Exam Questions With 100% Accurate Answers Rated A+| newest Version 2024 Phase mismapping: Appearance - ACCURATE ANSWER-AKA ghosting. produces replications of moving anatomy across the image in the phase direction. Usually occurs from anatomy that moves periodically (respirations, blood flow, swallowing, eye movement). Is phase mismapping/ghosting more or less apparent further from the source? - ACCURATE ANSWER-Less apparent. What is the ...

The exposure rate of an activity of 1 millicurie (mCi) measured at 1 centimeter (cm) is called - ANSWER-- The exposure rate constant (ERC) For positron emitters, the exposure rate constant (ERC) is about 6 R/h per milli- curie at 1 cm. The exposure rate of a 10 mCi dose of F-18 is approximately six times greater than that of a 10 mCi dose of Tc-99 m at a distance of approxi- mately 8 inches. Quantitative bias that refers to the underestimation of counts density which differs from what they s...

UPI II- EFOV and Modes Exam 2 - 2023...

How do you change TGP FOV? Polarity? Zoom? Auto Focus? correct answers China hat forward short. Boat switch foward or aft. DMS foward. TMS aft short How do you Laser Spot Search (LSS)? correct answers China hat aft short or press OSB How do you slave TGP to SPI? correct answers China hat aft long How do you make STEERPOINT SPI? correct answers TMS aft long How do make something SPI? correct answers TMS forward long How do you SLAVE ALL TO SPI? correct answers China hat forward lon...

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...