Imaging of MSK I & II Flashcards
What are:
Radiolucent
Radio-opaque?
dark
light
inside bone: 2 types:
cortical
cancellous/trebeculae bone
how many epiphyses in head of humerus?
3
What can be mis diagnosed as fracture? 3 things
epiphyses
ossification centre
nutrient foramen
3 types of joints
synovial
cartilaginous
fibrous (skull suture)
shoulder complex ideal position to take radiograph?
slight external rotation
MRI what are the 3 fundamental tissue properties?
proton density
T1: fluid dark
T2: fluid bright
advantages of plain films?
positioning: get standing views
cheap
less radiation
good overview
how long for MRI to scan a joint?
~20 minutes
Fat suppressed in T1 or T2?
T2
What structures on x-ray see better on internal rotation?
humeral head
What structures on x-ray see better on external rotation?
greater tuberosity
3 main views for elbow?
AP
lateral
AP oblique
what happens if you have elevated fat pads on x-ray in your coranoid/olecranon fossa?
joint effusion
When does capitulum first appear?
1st year
When does trochlear, lat epicondyle, olecranon first appear?
10th year on
When does medical epicondyle first appear?
5th year
When does radial head first appear?
5th year
when does medial and lateral epicondyle, radial head and olecranon fuse?
between 15-20 years
What is between the distal ulna and the triguetrum?
triangular fibrocartilage
what is normal radiocarpal angle?
15 degrees
how is carpal alignment during wrist movement? why?
maintained due to intercarpal ligaments
What does nuclear scintigraphy look at?
activity within bone
what kind of MRI image used in MSK imaging?
T2 fat suppressed
