RADIOLOGY

What do radiographs aid in?

THE DIAGNOSIS & TREATMENT OF ANIMALS

What are the basic requirements for an X-RAY?

- SOURCE OF ELECTRONS

- TARGET FOR ELECTRONS

- METHOD OF MOVING ELECTRONS FROM THE SOURCE TO THE TARGET

What are the three things that could happen when an X-RAY beam passes through an object?

1) PENETRATION

2) SCATTER

3) ABSORPTION

What are the factors that affect absorption?

- COMPOSITION

- DENSITY

- THICKNESS

What are the FIVE RADIOGRAPHIC OPACITIES?

1) AIR

2) FAT

3) SOFT TISSUES

4) BONES

5) METALS

Which matter is the most visible and why?

METALS: They are much more OPAQUE.

DENSITY

THE DEGREE OF BLACKNESS SHOWN ON THE RADIOGRAPH. IT IS THE EXPOSED PORTION ON THE FILM.

CONTRAST

THE DIFFERENCES IN DENSITY BETWEEN ADJACENT AREAS.

FORESHORTENING

WHEN THE OBJECT IS NOT PARALLEL TO THE CASSETTE.

SCATTER RADIATION

RADIATION THAT IS PROJECTED IN MANY DIRECTIONS. INCREASED SCATTER OCCURS WHEN THE POWER OF THE HIGH VOLTAGE CIRCUIT INCREASES.

How can SCATTER RADIATION be decreased?

USING DEVICES THAT DECREASES SCATTER RADIATION.

E.G. COLLIMATORS & GRIDS.

Ma

FILAMENT CIRCUIT

Kvp

HIGH VOLTAGE CIRCUIT

What are some ways to minimize radiation exposure?

WEAR CLOTHING OR EQUIPMENT THAT SHIELDS RADIATION TO MINIMIZE RADIATION EXPOSURE.

E.G. APRONS, GLASSES, GLOVES, GOWNS, & THYROID SHIELDS.

What are the FIVE IDENTIFICATIONS that should be on the film?

1) VETERINARY CLINIC NAME

2) DATE

3) CASE NUMBER / FILE NUMBER

4) PATIENT ID

5) LEFT MARKERS / RIGHT MARKERS

ARTIFACT

ANY UNWANTED BLEMISH ON THE FILM DUE TO IMPROPER HANDLING.