Imaging of the Lower Limb Flashcards

1
Q

What are some similarities between the hip and shoulder?

A

Ball and socket joint
Labrum
Trochanters/tuberosities for muscle attachment

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2
Q

What are some major differences between the hip and shoulder?

A

Hip weight bearing

No scapula

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3
Q

What kind of pain can happen at the hip joint?

A

Vague

Referred - often present with anterior knee pain

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4
Q

Which direction does the acetabular cup face?

A

Forward

Anterior margin more medial than posterior margin

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5
Q

What is the quadrilateral plate?

A

Rectangular section of bone on medial side of hip bone

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6
Q

Where is the lesser trochanter if the hip is internally rotated?

A

More posterior

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7
Q

Where is the lesser trochanter if the hip is externally rotated?

A

More anterior and is more obvious

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8
Q

What is the normal angle between the position of the neck and the longitudinal line?

A

120 degrees

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9
Q

In which direction is the femoral neck facing?

A

Slightly anterior

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10
Q

When does the secondary ossification centre for the femoral head appear?

A

6-9 months

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11
Q

When do the pubis and ischium fuse?

A

5 years

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12
Q

When does the secondary ossification centre for the greater trochanter appear?

A

7 years

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13
Q

What do the bones at the hip look like at 10 years?

A
Secondary ossification centres for
- Femoral head
- Greater trochanter
Pubis and ischium fused
Ilium not fused
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14
Q

What do the bones at the hip look like at 12 years?

A

Secondary ossification centre for lesser trochanter

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15
Q

What do the bones at the hip look like at 14 years?

A

Greater trochanter fused
Femoral head almost fused
3 hip bones fused

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16
Q

In which direction do trabeculae of the femur line up?

A

In direction of load

17
Q

What can trabeculae be used to identify?

A

Breaks/disruption of bone

18
Q

What makes the knee joint congruent?

A

Menisci

19
Q

What does an MRI of the knee show?

A

Marrow
Menisci
Tendons
Ligaments

20
Q

What are the signal intensities on a T1 weighted image?

A

Cortical bone = dark
Fluid = dark
Muscle = intermediate
Fat = bright

21
Q

What are the signal intensities on a T2 weighted image?

A

Cortical bone = dark
Fluid = bright
Muscle = intermediate
Fat = bright

22
Q

What do T2 weighted images use in musculoskeletal imaging?

A

Fat suppression

23
Q

Why is fat suppression used in T2 weighted images in musculoskeletal imaging?

A

Can more easily identify pathology within fat and bone marrow

24
Q

To which part of the femur does the anterior cruciate ligament attach?

A

Medial side of lateral femoral condyle

25
Q

To which part of the femur does the posterior cruciate ligament attach?

A

Medial side of medial femoral condyle

26
Q

What structures might be injured if the knee joint was dislocated?

A

Anterior and posterior cruciate ligaments commonly injured

More serious injuries to blood vessels posterior to knee joint