RAD 220 - THE FINAL COUNTDOWN

_____ introduced PSP imaging commercially in the US in the 1980s

• Agfa

• Kodak

• GE

• Fuji

Pixels arranged in rows and columns is called a _______.

• Grid

• Ratio

• Matrix

• PSP

This 'language' format allows images to be sent from modalities throughout the image viewing system.

• PACS

• DICOM

• TQM

• CQI

A histogram is a ____________________.

• graphical representation of a digital image, illustrating the frequency of values as well as the full range of values

• a radiologic study of body tissues using contrast media

• graphical user interface allowing for anatomical part selection with predetermined exposure values

• a numeric readout of estimated patient exposure displayed as air kerma

The active or phosphor layer of PSP imaging plates:

• converts x-rays into visible light

• traps the electrons from x-ray exposure and forms a latent image

• sends an electronic signal to an ADC for digital image output

• is composed of Cesium Iodide

What component of direct digital radiographic imaging absorbs x-ray photons and produces electrical charges?

• scintillator

• photoconductor

• PSP

• Barium Fluorohalide doped with Europium

An image created with too few x-ray photons will exhibit:

• overexposure

• saturation

• quantum mottle

• long scale contrast

Answer explanation

mAs is our x-ray photon quantity. If our quantity of x-rays is too low then the image will exhibit quantum mottle.

What color laser light is used in the IP reader to stimulate the PSP active layer to release the electron energy?

• Purple

• Blue

• Red

• Green

Indirect conversion digital radiography involves:

• x-ray energy immediately being converted to electrical signal

• x-ray energy being converted to light photons which are then converted to an electrical signal

• x-ray photon energy being 'captured' in a phosphor layer

• an amorphous selenium detector

Answer explanation

Indirect capture digital radiography is a two-step process. The incoming x-ray energy interacts with a scintillator layer, which then emits light photons which are then captured and converted into an electrical signal for image output.

The two technologies used to capture images in indirect digital radiography are:

• CCD

• Motherboard

• PSP

• CMOS