L14 Imaging UL

Question 1

shoulder joint projections

Answer 1

• AP
• lateral
• internal and external rotation
• axillary lateral
• AP with cranio-caudal downtilt

Question 2

What kind of joint is the elbow joint and what kind of X-Ray projections would you use?

Answer 2

• hinge type of synovial joint
• 3 main views
  
  • AP
  • lateral
  • AP oblique

Question 3

order of elbow epiphyses

Answer 3

• C: capitulum - 1st year
• R: radius - 5th year
• I: medial (INTERNAL) epicondyle - 10th year and onwards
• T: trochlear
• O: olecranon
• E: lateral (EXTERNAL) epicondyle

Question 4

Salter-Harris fracture

Answer 4

A Salter–Harris fracture or growth plate fracture is afracture that involves the epiphyseal plate or growth plate of a bone. It is thus a form of child bone fracture. It is a common injury found in children, occurring in 15% of childhood long bone fractures.

Question 5

Types of Salter-Harris fractures

Answer 5

Question 6

circular structures in the shoulder joint

Answer 6

• layer 1: labrum - deepens socket
• layer 2: capsule w/ ligamentous thickenings
• layer 3: tendons of rotator cuff
• layer 4: bones - coracoid, acromium, coraco-acromial arch

Question 7

MRI signal intensities with differences in musculoskeletal imaging T2 images

Answer 7

T1 and T2 usually

• cortical bone: dark
• fluid: dark for T1 and bright for T2
• muscle: intermediate
• fat: bright
• spinal cord: intermediate

in musculoskeletal imaging T2 weighted images use fat-suppresion

∴ fat and bone marrow: dark