Technique Chart

Question 0

What does a technique chart provide?

Answer 0

A consistent method for choosing the correct exposure factor settings

Question 1

What is a technique chart?

Answer 1

A document that lists predetermined exposure factor settings based on the thickness of the region on the animals body being radiographer

Question 2

What does a technique chart help avoid?

Answer 2

Having to recalculate each time a radiograph is taken

Question 3

What are three variables effecting technique chart formulation?

Answer 3

X ray machine
Animal species
Anatomical region

Question 4

What is extremities mostly made of?

Answer 4

Dense bone

Question 5

What is the thorax mostly made of?

Answer 5

Mostly less dense lung

Question 6

What is the abdomen made of?

Answer 6

Mostly soft tissues

Question 7

What is the three things in the formulation process?

Answer 7

Make sure everything is working
Evaluate x ray machine line voltage and set FFD
Use intensifying screen/film combination that will be used

Question 8

What is the perfect subject?

Answer 8

50lbs dog
Good body
Clean medium to short hair
Cooperation

Question 9

Where do you measure the perfect subject?

Answer 9

Laterally across the thickest part of the abdomen

Question 10

How do you determine the kVp requirement?

Answer 10

Sabres rule

Question 11

What is Sabres rule?

Answer 11

2 x tissue thicknessCM + FFD + grid factor =kVp

Question 12

Why does grid factor need to be added in santos rule?

Answer 12

To compensate for primary x rays absorbed by the grid during exposeur

Question 13

Does the table top need a grid factor?

Answer 13

No

Question 14

Why is mA typically set higher?

Answer 14

To avoid motion artifact on radiograph

Question 15

What are typical mA requirements for body regions using a fast intensifying screen/film combination? 4

Answer 15

Extremity/skull: 2.5ma s
Thorax: 5 mA s
Abdomen: 7.5 mA s
Pelvis/spine: 10 mA s

Question 16

If the film comes out to dark what should you do?

Answer 16

Decrease mA s by 30-50% or kVp by 10-15%

Question 17

What do you do if the film is to light?

Answer 17

Increase mA s by 30-50% or kVp by 10-15%

Question 18

Out of mA and exposure time and kVp which one is adjusted more often?

Answer 18

KVp

Question 19

How much kVp should you add or subtract for each centimeter change in measured thickness

Answer 19

2 kVp

Question 20

What can cause changes in tissue density affecting the quality of the radio graphic image?

Answer 20

Pathology and obesity

Question 21

What are six reasons pathological/abnormal conditions will require adjistment of exposure

Answer 21

Pleural fluid/cardiomegaly
As cites
Obesity/heavy muscle
Neonatal dog or cat
Plaster casts
Radio graphic contrast media

Question 22

What do you increase the mA s by during pathological/abnormal?

Answer 22

50% unless neonatal, then decrease