Imaging Lecture 1

Question 1

What are the seven steps involved in interpreting a radiograph?

Answer 1

1. Study Assessment
2. Radiographic Quality Control (VET331)
3. Systematic Examination of the included anatomy.
4. Describe the abnormal findings using roentgen signs (radiographic signs)
5. Make a radiographic Diagnosis/Conclusions
6. Consider the Differential Diagnosis ranked by additional information.
7. Determine a Plan

Question 2

What are two consequences of poor patient positioning?

Answer 2

• magnification and distortion of shape and unsharp margins
• artefactual narrowing of spaces

Question 3

For a VD view - state the entry point and the exit point”

Answer 3

• Entry point = ventral
• Exit point = dorsal

Question 4

Where is the marker placed on a lateral projection?

Answer 4

The marker is typically placed cranially or on the dorsal aspect

Question 5

Where is the marker placed on dorsopalmar/dorsoplantar projections of the limb?

Answer 5

Lateral aspect

Question 6

What marker should be put on dorsoventral or ventrodorsal projections?

Answer 6

• Right marker = right side
• Left marker = left side

Question 7

Where should markers be placed on projections of the skull?

Answer 7

• Right marker = anatomy on the right
• Left marker = anatomy on the left

Question 8

Complete the statement belows about marker placement:

On lateral projections ___(1)___ is up and cranial/rostral is to viewers ____(2)_____.

On ventrodorsal (VD) and dorsoventral (DV) views. ___(3)____ is up and the patients right is to the viewers ___(4)____.

Answer 8

1. Dorsal
2. Left
3. Cranial /Rostral
4. Left

Question 9

What are the three steps invovled in a study assesment (Step 1)?

Answer 9

1. ID
2. Region
3. Is the study adequate

Question 10

What are the four main considerations in step 2 (examaination of radiographic quality control)?

Answer 10

• Assess the Radiographic Film Quality
• Assess the Diagnostic adequacy of the examination performed
• Is the film of diagnostic quality?
• Are there any risks in reading this radiograph?

Question 11

What are the 7 Roentgen signs in step 3 +4?

Answer 11

1. Is it visible
2. Number
3. Size
4. Shape
5. Margin
6. Opacity
7. Location

Question 12

Name the five radio-opacities shown in the image below:

Answer 12

1. Air
2. Fat
3. Soft tissue
4. Mineral
5. Metal

Question 13

When describing tissue what term should be used instead of density?

Answer 13

• Opacity

Question 14

When a tissue on a radiograph is whiter it has increased __(1)____ or is more ___(2)____.

When a tissue has increased blackness it is ___(3)___ radio-opaque or more ____(4)_____.

Answer 14

1. Radio-opacity
2. Radiopaque
3. Less
4. Radiolucent