Radiographic Exposure- Unit 4: Exposure Technique

A quality radiographic image accurately represents the:

The _____ of the anatomic structures & the ______ of their structural lines recorded determine the overall ______ of the radiographic image.

Visibility of the recorded detail refers to the _____ & _____ of the image.

Amount of luminance (light emission) of a display monitor.

Amount of overall blackness on the processed image.

Another term for brightness.

The primary factor that affects the amount of brightness/density produced in an image is the amount or quantity of radiation (_____) reaching the IR.

____ ____ has more of an effect on the brightness of the image rather than mAs.

A lack of contrast makes an object appear:

Differences in the brightness levels or densities.

The range of brightness levels is a result of the _____ differential attenuation of the x-ray photons.

What tells you that you used the correct technique factors that the IR received?

The four MAJOR things to evaluate for a properly exposed radiograph is:

Sets the midpoint of the range of densities visible in the image.

Moving the window down down to a low pixel value (Decreases/Increases) ______ the brightness on the display monitor.

Moving the window level up to a high pixel value (Decreases/Increases) ______ overall brightness on the display monitor.

______ controls the radiographic contrast.

A narrow window width means:

A wider window width means:

The product of mAs is:

Directly proportional to the amount (quantity) of radiation.

Directly proportional to radiation quantity.

mA X Time =

As mAs is increased, the quantity of radiation reaching the IR is (Increased/Decreased) _______.

As mAs is decreased, quantity of radiation reaching the IR is (Increased/Decreased) ______.

A visible change in density requires a minimum amount of change in mAs be ______.

mA & time have an inverse proportional relationship when _____ the same mAs.

Doubling or halving your mAs means you're:

This alters the amount & penetrating ability of the x-ray beam.

Increasing or decreasing the ____ changes the amount of radiation exposure to the IR, and the contrast produced within the image.

A change of 15% in kVp will cause a doubling or halving of the density on the radiograph.
(The same way doubling/halving the mAs affects on image)

Quantum Noise/Mottle occurs because of:

Over exposure to the patient occurs because of:

When increasing the kVp by 15%, you need to decrease the mAs by ____.

When decrease the kVp by 15%, you need to increase the mAs by ____.

Maintaining the density by applying by the ___ Rule.

The controlling factor of contrast.

An increase in ____ causes a difference in the X-ray tube because it's causing more energy photons.

When an anatomic structure shows up too white, you need to _____ kVp because to much was absorbed & NOT reaching the IR.

What are the technical factors affecting density?

What are the geometric factors affecting density?

What materialistic factors affect density?

Distance or SID will alter the _____ of the x-ray beam reaching the IR according to the inverse square law.

Increased kVp yields increased _____.

SID or Distance affects the amount of radiation reaching the _____ & _____.

As the distance increases, the same amount of radiation will spread over an area that is created than the original, decreasing the beam's ______.

X-ray photons diverge as they travel _____ from the source.

If the distance is (Longer/Shorter) ______, the photons of not diverge as much & are then concentrated on a smaller area.

The intensity of the x-ray beam is _____ proportional to the square of the distance from the source.

Increase distance (SID), ______ (Increase/Decrease) the intensity of the beam, which (Increases/Decreases) _____ the density on the image.

The intensity of the x-ray beam is inversely proportional to the square of the distance from the source.

A (Smaller/Larger) _______ focal spot will utilize greater incident electron stream vs. (Small/Large) _______ focal spot.

______ Only affects density when unit not calibrated correctly.

_______ Involves the intensity of radiation within the x-ray beam & the effect that this would have on the density on the image.

Anode Heel Effect depends on:

Anode Heel Effect is more pronounced:

You should only repeat an image technique wise if you need to make a ______ change.

Two #'s to remember mAs with when changing techniques.

Photons are created at the ______.

The smaller the focal spot, the better the _____.

The bigger the focal spot, the worse the ______.

Manufacturers automatically control the ______ of radiation that the focal spots cam produce.

Focal Spot routinely affects density?
(TRUE/FALSE)

The Anode side of the tube, the beam is (More/Less) _______ intense. On the Cathode side of the tube, the beam is (More/Less) ______.

Beam intensity is measure in ______

______ of the beam is not uniform throughout all parts of the beam.

The variation in beam intensity is greater at a ______.

Variation of intensity can be as much as ______% change between anode & cathode sides.
**Can be more pronounced with steeper angle**

The anode should be placed at the _____ of the bed.

______ body part should be towards the cathode.

______ part if the body should be towards the anode side of the table.

The intensity of the beam is greater at the _______ side of the X-ray tube.

Have a proper placement of the part means a more uniform density along the ______ ______ of the image.

Beam is weaker on the anode side of the tube than on the cathode side (Put anode side of tube by thinnest body part in the beam).

______ affects x-ray quantity.
**Results in higher beam quality**

Even though filters reduce the intensity of the primary beam, they do NOT reduce the intensity of the ____ ____ reaching the IR.

Radiographic density will (Increase/Decrease) ______ whenever filtration is added.

Beam restrictors includes:

Reducing field size will ______ density. (Increase/Decrease)

Why does reducing the field size decrease density?

The purpose of a grid is to remove:

The higher the grid ratio, the (More/Less) _____ for density.

Adding, removing, or changing grids require an adjustment in _____ to maintain radiation exposure to the IR.

The amount of the beam that is absorbed by the patient depends on:

Thickness of body part can be altered by: