Chapter 5 X-Ray Imaging System

Measures Quantity of radiation reaching the image receptor and terminates when enough radiation is given sufficient Optical Density has reached the film.

• Electronic Timer

• Exposure Timer

• Automatic Exposure Control

• Full Wave Rectification

Designed to supply precise Voltage to the Filament and high voltage circuits of the x-ray machine.

• High Voltage Transformer

• Automatic Exposure Control

• Filament Circuit

• Autotransformer

Most common timer used today.

• Exposure Timer

• Electronic Timer

• Mechanical Timer

• Synchronous Timer

This timer has complex circuitry and accurate up to one millisecond.

• Exposure Timer

• Electronic Timer

• Mechanical Timer

• Synchronous Timer

This timer is based off of the length of exposure time is determined by the Radiographer or by AEC.

• Exposure Timer

• Electronic Timer

• Mechanical Timer

• Synchronous Timer

This type of timer consists of mechanical and electronic device whose action is to make and break the high voltage across the tube.

• Exposure Timer

• Electronic Timer

• Mechanical Timer

• Synchronous Timer

This type of generator is designed to produce radiographic exposure in the shortest possible time by operating the x-ray tube at the highest mA setting without exceeding tube heat capacity

• High Voltage Generator

• Filament Generator

• Falling Load Generator

• Failing Load Generator

This equipment makes specific exposure time that cannot be set and can only be used by AEC

• Synchronous Timer

• Falling Load Generator

• Filament Circuit

• Line Compensator

This allows the negative half cycle to be reversed so that a positive voltage is always directed across the tube.

• High Voltage Transformer

• Falling Load Generator

• Full Wave Rectification

• Line Compensator

When voltage is not allowed to swing negatively during the negative half cycle.

• Full Wave Rectification

• High Voltage Transformer

• Line Compensator

• Half Wave Rectification