In an image intensification tube, 5,000 x-ray photons exit the patient and interact with the input phosphor and 125,000 light photons are released from the output phosphor. What is the flux gain?
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An ____ grid error occurs when the x-ray tube is angled perp…
An ____ grid error occurs when the x-ray tube is angled perpendicular to the grid strips.
Action limits that are established by hospitals are typicall…
Action limits that are established by hospitals are typically _____ of the annual dose limit in efforts to ensure that personnel do not approach EfD limits.
Which of the following occurs when the magnification mode is…
Which of the following occurs when the magnification mode is used in image intensification fluoroscopy? The voltage on the electrostatic focusing lenses increases The focal spot moves closer to the input phosphor The resolution of the fluoroscopic image decreases
Calculate the minification gain for an image intensifier tha…
Calculate the minification gain for an image intensifier that has an input phosphor of 22 cm in diameter and an output phosphor of 5 cm in diameter.
In vascular fluoroscopy, which condition results in abnormal…
In vascular fluoroscopy, which condition results in abnormal bulging?
ALARA may also be referred to as:
ALARA may also be referred to as:
The centering indicator must be accurate to within _____.
The centering indicator must be accurate to within _____.
Which of the following is considered to be added filtration?
Which of the following is considered to be added filtration?
Which image intensifier components are negatively charged?In…
Which image intensifier components are negatively charged?Input phosphorElectrostatic lensesPhotocathodeOutput phosphor