The resolution of the fluoroscopic image is directly affected by the WHAT?. Many video monitoring systems are limited to a 525-line raster pattern where fluoroscopic geometric factors affect the overall resolution of the image.

Many video monitoring systems are limited to a WHAT? where fluoroscopic geometric factors affect the overall resolution of the image.

Many video monitoring systems are limited to a 525-line raster pattern where WHAT? affect the overall resolution of the image.

Many video monitoring systems are limited to a 525-line raster pattern where fluoroscopic geometric factors affect the

It is affected by the same factors as in static radiography

It is directly affected by the video monitoring system

The fluoroscopic geometric factors include

Affected by same parameters as static radiography

Size distortion is affected by

Primarily afftects the size distortion

Geometric problems in what?

shape helps reduce shape distortion, but does not remove it all

Concave shape helps reduce what?

Vignetting or pin cushion effect

the presence of a brighter light intensity at the center of the fluoroscopic image on an image intensifier than at the periphery of the field.

Blotchy, grainy appearance

Quantum mottle appearance

Quantum mottle is caused by

Remedial for quantum mottle

is the grainy appearance which is caused by insufficient radiation to produce a uniform image.

Quantum mottle is the grainy appearance which is caused by WHAT? To produce a uniform image.

Quantum mottle is controlled by

It is controlled by the mA and time

assist in reducing quantum mottle.

Viewing system

Video camera tubes

Video camera coupled to output screen and monitor

Vidicon or Plumbicon tube

Video cameras

plumbicon or vidicon tube difference

The standard types video camera are called

Video camera tubes are similar in operation

The video camera tubes have WHAT which maintains a vacuum and provides support for the internal components.

The video camera tubes have a glass envelope which what?

Inside the TV camera tube are what?

is a video camera tube design in which the target material is a photoconductor.

Vidicon tube is a video camera tube design in which the target material is a what?

a storage-type camera tub

The vidicon is a storage-type camera tube in which WHAT? is formed by the imaged scene radiation on a photoconductive surface which is then scanned by a beam of low-velocity electrons.

The vidicon is a storage-type camera tube in which a charge-density pattern is formed by the on WHAT? a photoconductive surface which is then scanned by a beam of low-velocity electrons.

The vidicon is a storage-type camera tube in which a charge-density pattern is formed by the imaged scene radiation on a photoconductive surface which is then scanned by what?

Used frequently in broadcast camera applications

these tubes have low output, but a high signal-to-noise ratio.

Video camera tubes components

Shapes electron beam

Cathode assembly

Cathode heating assembly

Electron gun and thermionic emission is found in

Some fluoroscopy systems use a this instead of a video tube

a semiconducting device capable of storing a charge from light photons striking a photosensitive surface.

stores these electrons which make up the latent image.

The ccd stores these electrons which make up what

A video signal is then emitted in a what? by discharging the stored electrons as pulses.

A video signal is then emitted in a raster scanning pattern by

The main advantage of the CCD is the extremely fast discharge time which is useful in WHAT where high-speed imaging is critical to visualizing blood flow.

The main advantage of the CCD is the extremely fast discharge time which is useful in cardiac catheterization where high-speed imaging is critical to what?

The CCD operates

it is more sensitive than video tubes,

When ccd operated at low voltage it makes the ccd what?

the type of monitor used to display the fluoroscopic image

CRT is like

Crt Like a video tube, it consists of a

Like a video tube, it consists of a vacuum tube, an electron gun (cathode) with focusing and deflecting electromagnets for what?

It is much larger than the video tube and has an anode assembly with a fluorescent phosphor coated on the inside of the front screen.

It is much larger than the video tube and has an anode assembly with a what? on the inside of the front screen.

Anode assembly in crt

Positively charged thin film of graphite

Signal plate is what

Changes light pattern to electronic signal sent to video system

Target function

Thin insulating mica minerals

Thin insulating mica minerals are what

Matrix of globules of photoconductive material

Target assembly

Target of vidicon

Target of plumbicon

Semiconducting device

Video camera ccd emits electron in what?

Fast discharge eliminates lag

Emits electrons in proportion to amount of light striking photoelectric cathode

Operate at lower voltages than video tubes

More durable than video tubes

Image intensifier output screen coupled to TFTs

Image intensifier output screen coupled to what?

In digital fluoroscopy it is coupled to TFTs

These are connected to each pixel element

limited in favor of radiation exposure concerns

Resolution limited in favor of radiation exposure concerns

Resolution limited in

Recording the Fluoroscopic Image

Film used in recording the fluoroscopic image

Dynamic system

Movie camera intercepts image

Cine film formats

Record series of static exposures at high speed

Record series of static exposures at what

Record what? at high speed

Cine film frame

Offer increased resolution