NM 122 - Chapter 8 (Week 3)

The preset-time mode on a counter is:

All of the following are true regarding oscilliscopes EXCEPT:

Rate meter time constant is determined by multplying the rate at which the charge discharges through the resistor(R) &:

The maximum time interval between two pulses for them to be counted as being in coincidence is referred to as the:

____ control the scaler counting time

___ measures the distribution of energies deposited in the radiation detector.

The____converts the alternating current (AC) voltage provided by the line source into a direct current (DC) voltage

Each decimal counter assembly in a counter records from zero to nine events

___produces an output signal with a voltage proportional to the time difference btw 2 logic pulses supplied to the input

The generic name for scaler-timers is:

___ refers to the voltage varying which can result in image noise and image degradation

The high-voltage power supply provides charge collection to all of the following EXCEPT:

___ identifies the two-way coincidence events resulting from annihilation photons in PET

___ is an instrument that incorporates both scalers and timers in a single unit.

PET imaging commonly utilizes coincidence units for image acquisition

Most modern scalers are capable of ____ MHz counting rates

___ utilizes a Start and Stop signal.

The ___ pulse resets the counter assembly to zero and sends a pulse to the next DCA in the series