Radiology Flashcards
What are 3 results of radiation to the cells?
- Damage may be repaired without incident; vast majority of damage to cells is repaired successfully
- Damage may be repaired with errors: this type can lead to:
- Increased risk of cancer (including skin cancer, leukemia)
- Rish of birth defects
- Damage may be lethal; high doses of radation can kill cells, leading to tissue damage
- For example cataracts to the lens of the eye
What controls the electrical potential across the filament resulting in the volume or quantity of x-ray beams created?
Miliamperage circurit
How does changing the kVp change a radiograph?
Increase: less contrast, more latitude
Decrease: more contrast, less latitude
What is the maxium permissible dose (MPD) for a veterinary techician over 1 year?
5 rem or 50mSv per year
Define: Cystogram
Radiograph of the urinary bladder region
Taken after injection of positive-contrast medium directly into the bladder via a urinary catheter
What causes linear artifacts on a radiograph?
The grid
How does changing the Milliamperage change a radiograph?
Increase: increased exposure
Decrease: decreased exposure
How does changing the field time change a radiograph?
Increase:
Decrease:
What is a fistulogram?
Radiograph after contrast agent is administered into the draining tract
What is another name for millaperage?
mAs
What is the “heel effect” in diagnostic radiology
X-ray beam intensity declines toward the anode side of the x-ray machine
Describes intensity of the x-ray beam declines from the cathode side toward the anode of the machine because of the angle of the anode
How many days after fertilization will canine fetal skeletons first appear on a radiograph?
42 days
What does ALARP stand for?
As Low As Reasonabily Possible
What part of the heart is most commonly enlarged on a chest film of a dog with heartworm?
Pulmonary Arteries
When should abdominal radiographs be taken?
Full expiration
