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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
MRI wrist axial scan range is __
Range = 1 inch above CMC joint to 1 inch below distal DRUJ Position block horizontally across wrist joint
26
MRI wrist sagittal scan range is __
Angulate till coronal plane crossing carpal bones vertically Position block vertically across carpal bones
27
MRI knee patient positioning
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
MRI knee sagittal scan range is __
Planning block parallel to lateral femoral condyle Parallel to midline of femur & tibia
29
MRI knee axial scan range is __
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
MRI knee coronal scan range is __
Range = patella till soft tissues posterioly Planning block parallel to medial & lateral femoral condyle Parallel to midline of femur & tibia
31
MRI knee sagittal oblique scan range is __
Parallel to anterior cruciate ligament Parallel to inner margin of lateral condyle
32
MRI ankle patient positioning
Supine with feet towards magnet Ankle angled 90 degrees using ankle coil Laser beam localiser over ankle joint
33
MRI ankle axial scan range is __
Range = 2 inches above tibiotalar joint down to plantar aspect of foot Parallel to tibiotalar joint Position block parallel to tibiotalar joint
34
MRI ankle sagittal scan range is __
Range = outer border of medial malleolus to outer border of lateral malleolus Position block perpendicular to line between medial & lateral malleoli
35
MRI ankle coronal scan range is __
Range = covers ankle joint from achilles tendon to midfoot Parallel to tibia
36
MRI lower limb patient positioning
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
MRI lower limb axial scan range is __
Position block perpendicular to tibial shaft
38
MRI lower limb coronal scan range is __
Aligned with right & left tibial shafts Position block parallel to tibial shaft
39
B values reflect __
strength & timing of gradients to generate DWI
40
B values measure __
degree of diffusion weighting applied - Amplitude - Time of applied gradients - Duration between paired gradients
41
Increasing gradient amplitude & duration & interval widening between paired gradient pulses = ___ B value
higher

HSC3007 MRI (10 decks)

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