Aec Jeopardy Template

AEC Designs	Phototimer AEC Units	AEC Factors	Backup Timer
100 What are the two types of AEC units? Ionization Chamber and Phototimer	100 Because of the size of the fluorescent screen and photomultiplier, where must it be positioned? Behind the cassette	100 What are the two important factors to consider when using AEC? Patient position and detector selection	100 What is the maximum mAs a patient can be exposed to when using a backup timer? 600 mAs
200 What is a capacitor? A device used to store a specific quantity of electricity	200 What receives the light energy and converts it to electrical energy? Photomultiplier tube	200 Why is it important to center the anatomical part of interest over the center of the detector? AEC units use detectors to receive radiation passing through the patient	200 What is a backup timer? It prevents excessive exposure to the patient in cases of timer switch failure or radiographer error
300 What happens when the maximum amount of electricity is stored? It will cause the capacitor to discharge	300 What does the amount of electrical energy produced depend on? The amount of light produced by the fluorescent screen	300 Will the shoulder be under or over exposed if only the top portion of the shoulder is positioned over the detector? Shoulder will be underexposed	300 What is an advantage of a backup timer? It protects the x-ray tube from being unnecessarily overheated from excessively long exposures
400 Where are the ionization chambers located? Between grid of Bucky and cassette	400 Why does phototimers require cassettes with no foil backing? A backing would interfere with the transmission of x-rays through the cassette to the detector	400 What does the radiographer have to do to have a sound knowledge of anatomy and radiographic positioning? Make the proper detector selection	400 What is the most common reason for backup timer activation? Radiographer error
500 What is the exposure to the patient and film dependent on? The energy conversions that take place through the complex circuitry of these units	500 What are the two manual set exposure factors? mA and kV	500 Why does overexposure of the soft tissue structures result? It takes longer for enough radiation to exit the spine and strike the detectors than it does for the adjacent soft tissue structures	500 What is an error to cause the backup timer to be activated? When the x-ray tube is off centered to the grid

AEC

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