Ex 1 - Four Radiographic Qualities

What are the two properties of a radiograph?

photographic and geometric

Photographic properties affect what on a radiograph?

receptor exposure and contrast

What is affected on a radiograph based on geometric properties?

distortion and recorded detail

The four radiographic qualities are......

recorded detail, receptor exposure, contrast, and distortion

Receptor exposure is the _______ of the image

overall blackness

What is receptor exposure controlled by?

the number of xrays used

Too much exposure causes the image to be too dark or _______

over penetrated

Too little exposure causes the image to be too light or_______

under penetrated

The difference between adjacent receptor exposure on a radiograph

contrast

Contrast is controlled by the ______

energy of the xray beam

With high contrast on an image, you can see ________

few shades of gray

With low contrast on an image, you can see _______

many shades of gray

Black and white images are due to _______

high contrast

Multiple shades of gray are due to _____

low contrast

The sharpness of the lines of the image is_______

recorded detail

Recorded detail is controlled by the distance between the ______ , _______ , and _______

tube, patient, and image receptor

Which radiographic quality is the misrepresentation of the true size and shape of the image when compared to the object?

distortion

Distortion is controlled by __________ and the angle of the tube, patient, and image receptor

SID and OID

There are two types of distortion. What are they?

size and shape

Size distortion creates _____ of an image.

magnification

Images do not appear as the the object does with _____

shape distortion

What do images tend to look like with size distortion?

magnified

What do images tend to look like with shape distortion?

stretched out

Shape distortion is controlled by the ______ of the tube, patient, and image receptor

angle

Size distortion is controlled by the ______ between the tube, patient, and image receptor

distance

What are primary factors that make a major difference?

controlling factors

What are secondary factors that only affect the outcome of the radiograph?

influencing factors

What causes an image to be too dark or too light?

receptor exposure

T or F: When the contrast of a radiograph is either too high or too low, some parts can be seen more over others

true

Poor recorded detail of an image can cause the image to be ______

blurry

The image appears larger or smaller than the actual object because of ______

distortion

When the image is stretched out, it is caused by _______

distortion

What are the two controlling factors?

mAs and kVp

What is the controlling factor for receptor exposure?

mAs

kVp is the controlling factor for _____

contrast

What does filtration do?

absorbs low energy xrays

Which influencing factor affects radiation to the receptor and collimation?

Beam restriction

What does using a grid for an image do?

Cleans scatter

What is the exact source of the xray?

Focal spot

Which two radiographic qualities have NO controlling factors?

Distortion and recorded detail