Radiology Flashcards
1
Q
Importance of XR
A
- To assess osteochondral changes, growth disturbances, soft tissue calcifications, osteopenia
2
Q
Important of US
A
- Good for visualizing various periarticular and intra articular structures including cartilage and bone
- Very sensitive for synovitis, tenosynovitis, paratendonitis, and enthesitis
3
Q
Importance of CT
A
- Detailed assessment of osseous structures in locations that are difficult to assess with conventional radiography
- Fast, no sedation
4
Q
Cone beam
A
- Good for TMJ, short, 15 times lower radiation than conventional CT
5
Q
MRI
A
- Great except for cortical bone
- Need sedation because it takes forever
6
Q
T1 weighted
A
- Water components from tissue edema, joint effusion, CSF appear dark (low signal)
7
Q
T2 weighted
A
Water components from tissue edema, joint effusion, CSF appear bright
8
Q
Muscle signal
A
intermediate
9
Q
Tendon
A
Low
10
Q
Early JIA abnormalities on XR
A
- good for chronic changes and damage
- Soft tissue swelling, osteopenia, effusions
- Periosteal reaction may occasionally be seen (fingers, toes)
- Knee effusions are best seen on lateral view
- Can see displacement of fat pads in elbow, knee, and ankle
- Joint space narrowing and bone erosions are later (two or more years after disease onset–> but might see earlier in RF positive poly or systemic
- Joint space narrowing suggests cartilage loss
11
Q
Ultrasound in JIA
A
- good for assessing disease activity and monitoring response to treatment
- Hard for cartilage
- Good for erosions
- Great for help with joint injections except for TMJ
12
Q
Rice bodies
A
- Can be seen with prolonged synovial inflammation in JIA or TB on MRI
