Introduction to Radiology

Number of electrons generated

mAs will determine what when taking a radiograph?

Power to use a radiograph

kVp will determine what when taking a radiograph?

Lighter - less exposure makes it appear lighter

The more rays absorbed by a tissue mean the image will be?

Grayness

Scattered rays in the patient will contribute to what on the radiograph?

Darker/ black - no absorption

Rays that do not interact/ are not absorbed will appear how on a radiograph?

Increases the amount of absorption and decrease the amount of exposure

What is the purpose of an intensifying screen in a radiograph?

Air

Fat

Water

Bone

Metal

In order of L to R what are the 5 radiographic opacities?

The more differences in opacity will make the brain see lines that aren't truly there

What is Mach phenomenon?

White areas on a radiograph/ lighter

What is radiopacity?

Looks more black (less bone density)

What is radiolucency?

Good positioning

Appropriate technique

Appropriate labeling

At least 2 views

What four things make for a quality radiographic study?

Making the image darker and unable to see soft tissue - lose important info

What is overexposure?

Making an image too light - can cause artifactual lesions

What is underexposure?

Left

In a lateral radiograph the cranial/ rostral side will always point ____?

Right

In a lateral radiograph the caudal side will always point ___?

Uppermost

Lowest

In a lateral radiograph the dorsal side will be ___ and the ventral side will point __?

Uppermost

Bottom

In a V/D or D/V cranial will be ___ and caudal will be __?

Right

Left

In a V/D or D/V left will point __ and right will point ___?

Abdominal VD

Identify the type of radiograph taken?

R lat thorax

Identify the type of radiograph taken?