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

Under the remedial action for natural resources in NRCP Report No. 116, the effective dose (excluding radon) is:

Exposure timer accuracy must be _____ for exposure times greater than 10 ms and _____ for exposure times less than 10 ms.

In vascular fluoroscopy, which condition results in abnormal bulging?

Which image intensifier components are negatively charged?Input phosphorElectrostatic lensesPhotocathodeOutput phosphor

What is the spatial frequency for a pixel size of 0.2 mm?

Which of the following is/are included in the code of standards that went into effect in 1974 for diagnostic x-ray equipment? Inclusion of manual backup timers for AEC exposures Positive beam limitation A required number of protective lead aprons per fluoroscopic unit Presence of “beam on” indicators to give visible warnings when x-ray exposures are in progress

According to the code of standards for diagnostic x-ray equipment, exposure reproducibility is defined as:

What is the permissible equivalent dose to the lens of the eye for the public?

Which of the following terms is defined as a level of radiation that is recommended as an upper boundary dose that will result in a negligible risk of bodily injury or genetic damage?