Fluoro & Digital Imaging (3rd sem.)

Where should the image intensifier be located?

If you lower mA, what happens to your exposure time?

What are the two types of AEC detectors

The capability of a screen to produce visible light is called:

In direct digital radiography, the photoconductor is made of:

With AEC, what happens if you use a higher kVp technique? (multi ANS)

The human eye can detect how many shades of gray at a particular level?

The useful imaging area of a digital IR is the:

When using AEC, a destructive pathologic condition may cause ________ exposure to the IR

Other wise known as a "burst of light", this generates light photons in response to X-rays:

Why is the backup timer feature important? (multi ANS)

The range of exposure intensities that an IR can respond to is:

Using DR, you overexposed an image. What action should be taken to provide an optimal quality image?

The part of the image intensifier that absorbs electrons and allows them to be converted to the digital image is the:

A semiconductor that turns light to an electric charge & it stores the charge in a capacitor

In fluoro, this function automatically adjusts exposure techniques during a dynamic procedure:

The AEC backup timer should terminate exposure no more than: (2 ANSWERS)

What is the purpose of an AEC back-up timer?

The photocathode is made of:

What device absorbs X-rays and creates an electrical signal?

Which of the following will not be found on a direct capture digital device?

What is the difference between a photomultiplier tube and a photodiode?

_____ is a picture archival/communication system group of comps, servers & archives designed to manage digital images

If the matrix size increases, pixel size will:

The part of the image intensifier that absorbs light and emits electrons is the:

Made of lightweight plastic, this houses a PSP plate.

_____ is the standard format for digital medical imaging.

AEC controls only the qty of radiation and has no effect on contrast.

Which of these fluoro safety features will terminate exposure immediately?

The input phosphor of an image intensifier does this:

As pixel size decreases, spatial resolution will:

The primary purpose of AEC is to:

The PSP goes through a final "erasure stage" by the use of what?

Exit Type AEC is also known as:

AEC backup time should be set @ _____ of the expected exposure time.

Which magnification mode will cause the most exposure to the patient?

Name that missing part!

A PSP is scanned & energy from trapped electrons are released by a process known as:

What is the formula for brightness gain?

Approx. what % of removed electrons are trapped in the PSP's conduction band?

Name the missing part!

An electronic vacuum tube that increases light intensity

Pick the correct detector: Pt -> IR -> detector -> electricity produced -> timer is tripped

Who developed the commercial fluoroscope?

When using AEC, a prosthetic part may cause ________ exposure to the IR.

A diode tube connected to the output phosphor of an II by fiberoptic bundles or lenses most commonly used today:

In DR, indirect capture imaging, the photodetector is generally a ____ ____ photodiode.

As the speed class of a DR system decreases, image noise will:

Semiconductor capacitors made of metal oxide are components of the:

Name that picture!

Entrance Type AEC is also known :s

Pick the correct detector: air is ionized, electric charge created, timer tripped

The AEC device most used in radiography today is the:

The minimum exposure time allowed by an AEC device defines:

Name that picture!

How is the latent image on a PSP plate extracted?

The input phosphor is made of:

The thickness or width of a focal plane is called:

A photodetector used in indirect, cassette-less imaging:

What are the typical diameters of the input & output phosphors?

An expression of the potential "speed class" that is required to produce an optimal image is:

The number of gray levels possible in an image defines:

Which of the following will not be found on an indirect capture DR system?

Which portion of the PSP plate stores the latent radiographic image?

What charge does electrostatic focusing lenses have?

If a matrix size is decreased, spatial resolution will ______.

The ability of an intensifying screen to absorb incident photons is:

If the matrix size increases, pixel size will:

The output phosphor is made of: