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HSC3007 MRI > Week 10 > Flashcards

Week 10 Flashcards

1
Q

spine imaging is done mainly __

A

sagittal & axial

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2
Q

when is coronal plane used for spinal imaging

A

if patient has moderate to severe scoliosis / lesion

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3
Q

what is best used for anatomical detail

A

T1w

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4
Q

fat is bright on __

A

T1, T2 and PD

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5
Q

fluid is brightest in __

A

T2

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6
Q

what is good for screening fluid & pathology

A

STIR & T2 FS

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7
Q

what is PD FSE used for

A

meniscal tears, tendinopathy, labral tears

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8
Q

what are used for pathological processes

A

T2W FSE
T2W FSE + FS
STIR
T1W FS + C

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9
Q

MRI cervical spine patient positioning

A
  • Headfirst supine
  • Position head in birdcage coil & immobilized with cushions
  • Cushion under legs for extra comfort
  • Laser target over mid neck (2.5 cm below chin in chin-down position)
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10
Q

MRI cervical spine axial scan range is __

A
  • Positioning block perpendicular to spinal cord
  • Parallel to IV disc space
  • Range = Mid C2 to Mid T2 vertebral body
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11
Q

MRI cervical spine sagittal scan range is __

A
  • Positioning block parallel to spinal cord
  • Parallel to line along center of vertebral body through length of spinous process, right to left transverse process
  • Range = Brain stem to mid T2
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12
Q

MRI thoracic spine axial scan range is __

A
  • Positioning block perpendicular to spinal cord
  • Parallel to IV disc space
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13
Q

MRI thoracic spine patient positioning

A
  • Headfirst supine
  • Position head in birdcage coil & immobilized with cushions
  • Cushion under legs for extra comfort
  • Laser target over mid sternum (T4/5)
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14
Q

MRI thoracic spine sagittal scan range is __

A
  • Positioning block parallel to spinal cord
  • Parallel to line along center of vertebral body through length of spinous process, right to left transverse process
  • Range = Mid C7 – Mid L2
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15
Q

MRI thoracic spine SAG STIR used for

A

detecting spinal metastasis

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16
Q

MRI lumbar spine patient positioning

A

Headfirst supine

Position head in birdcage coil & immobilized with cushions

Cushion under legs for extra comfort

Laser target over mid abdomen

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17
Q

MRI lumbar spine axial scan range is __

A

Positioning block perpendicular to spinal cord

Parallel to IV disc space

Range = mid T11 – S3

18
Q

MRI lumbar spine sagittal scan range is __

A

Positioning block parallel to spinal cord

Parallel to line along center of vertebral body through length of spinous process, right to left transverse process

FOV = entire lumbar & sacral spine from T11 to coccyx

19
Q

MRI shoulder patient positioning

A

Supine with head towards magnet (headfirst supine)

Shoulder in shoulder coil & immobilized using sandbags

Centre laser over shoulder joint or midline of coil

20
Q

MRI shoulder sagittal scan range is __

A

Angle position block perpendicular to supraspinatus tendon

Parallel to humerus

Range = entire shoulder joint from deltoid muscle to scapular notch

21
Q

MRI shoulder axial scan range is __

A

Position block perpendicular to glenohumeral joint

Perpendicular to humeral head

Range = Top of AC joint to just below glenohumeral joint below axilla

22
Q

MRI shoulder coronal scan range is __

A

Position block parallel to supraspinatus tendon

Parallel to humeral head

Range = cover entire shoulder joint

23
Q

MRI wrist patient positioning

A

Head first prone with arm up (superman)

Position wrist in wrist coil or small flex coil & immobilized with cushions

Cushion under chest for extra comfort

Center laser beam localizer over wrist joint

24
Q

MRI wrist coronal scan range is __

A

Position block horizontally across carpal bones

Covers wrist joint from dorsal to palmar aspect

25
Q

MRI wrist axial scan range is __

A

Range = 1 inch above CMC joint to 1 inch below distal DRUJ

Position block horizontally across wrist joint

26
Q

MRI wrist sagittal scan range is __

A

Angulate till coronal plane crossing carpal bones vertically

Position block vertically across carpal bones

27
Q

MRI knee patient positioning

A

Supine with feet first

Position knee in knee coil & immobilize under cushions

Give cushions under ankles for more comfort

Target beam over lower border of patella

28
Q

MRI knee sagittal scan range is __

A

Planning block parallel to lateral femoral condyle

Parallel to midline of femur & tibia

29
Q

MRI knee axial scan range is __

A

Range = superior border of patella to tibial tuberosity

Planning block parallel to medial & lateral femoral condyle

Angulate in sagittal till perpendicular to line of femur & tibia

30
Q

MRI knee coronal scan range is __

A

Range = patella till soft tissues posterioly

Planning block parallel to medial & lateral femoral condyle

Parallel to midline of femur & tibia

31
Q

MRI knee sagittal oblique scan range is __

A

Parallel to anterior cruciate ligament

Parallel to inner margin of lateral condyle

32
Q

MRI ankle patient positioning

A

Supine with feet towards magnet

Ankle angled 90 degrees using ankle coil

Laser beam localiser over ankle joint

33
Q

MRI ankle axial scan range is __

A

Range = 2 inches above tibiotalar joint down to plantar aspect of foot

Parallel to tibiotalar joint

Position block parallel to tibiotalar joint

34
Q

MRI ankle sagittal scan range is __

A

Range = outer border of medial malleolus to outer border of lateral malleolus

Position block perpendicular to line between medial & lateral malleoli

35
Q

MRI ankle coronal scan range is __

A

Range = covers ankle joint from achilles tendon to midfoot

Parallel to tibia

36
Q

MRI lower limb patient positioning

A

Feet first supine / head first supine

Patient over spine coil and body coils over lower leg from knee to ankle joint

Laser beam localiser over middle of lower leg

37
Q

MRI lower limb axial scan range is __

A

Position block perpendicular to tibial shaft

38
Q

MRI lower limb coronal scan range is __

A

Aligned with right & left tibial shafts

Position block parallel to tibial shaft

39
Q

B values reflect __

A

strength & timing of gradients to generate DWI

40
Q

B values measure __

A

degree of diffusion weighting applied
- Amplitude
- Time of applied gradients
- Duration between paired gradients

41
Q

Increasing gradient amplitude & duration & interval widening between paired gradient pulses = ___ B value

A

higher

HSC3007 MRI (10 decks)

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