CHAPTER 6 X-Ray Equipment

Three types of diagnostic radiographic tube support systems

1. Ceiling-mounted support systems 2. Floor-mounted support systems 3. Mobile support systems.

Types of incoming-line current

1. Alternating current (AC) 2. Direct current (DC).

Pulses per Hz for 1Φ and 3Φ power

1Φ power has 2 pulses per Hz; 3Φ power has 6 pulses per Hz.

Device in the x-ray circuit that controls kVp, mA, time, and rectification

The x-ray generator.

Difference between an ionization chamber and a phototimer

An ionization chamber measures radiation exposure through ionization of air, while a phototimer measures exposure using a photomultiplier tube to detect the amount of light generated.

Factor that determines the minimum reaction time

The design and circuitry of the automatic exposure control system.

Why backup time is necessary when using automatic exposure control

Backup time ensures that an exposure is terminated if the automatic exposure control fails to terminate the exposure adequately.