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Advanced Imaging > Which modality? (Final Exam) > Flashcards

Which modality? (Final Exam) Flashcards

(94 cards)

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1
Q

Acute brain bleeds #1

A

CT

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2
Q

Acute brain bleeds #2

A

Diffusion weighted MRI

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3
Q

Looking for hematoma AROUND the brain

A

CT

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4
Q

Stroke or ruptured aneurysm IN the brain

A

EQUAL: CT and diffusion weighted MRI

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5
Q

Head trauma first 48 hours

A

CT

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6
Q

Head trauma after 48 hours

A

MRI

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7
Q

Brain aneurysm #1

A

MRA

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8
Q

Brain aneurysm #2

A

MRI

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9
Q

Brain aneurysm #3

A

CT

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10
Q

MS #1

A

MRI

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11
Q

MS #2

A

CT (not as sensitive)

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12
Q

Arnold-Chiari #1

A

MRI definite first

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13
Q

Arnold-Chiari #2

A

CT distant second

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14
Q

Multiple Sclerosis

A

Image brain first since thats usually where plaque starts

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15
Q

Arnold-Chiari

A

Increased predisposition if other anomalies are present. In order to rule out a syrinx both brain and C-spine need imaging. Type 1: 4mm or less. Type 2: 5mm or more

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16
Q

Brain tumor #1

A

MRI

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17
Q

Brain tumor #2

A

CT close second

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18
Q

Vertebral Artery Dissection or Stenosis #1

A

MRA (not great)

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19
Q

Vertebral Artery Dissection or Stenosis #2

A

MRI (not great)

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20
Q

Carotid Artery Stenosis #1

A

Ultrasound (cheaper if following progress overtime)

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21
Q

Carotid Artery Stenosis #2

A

MRA (more accurate but more expensive)

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22
Q

Finding a fracture #1

A

CT

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23
Q

Finding a fracture #2

A

EQUAL: Bone scan & MRI

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24
Q

Cervical spine fractures

A

CT always #1

15-30% of fx will never be detected on plain film. They are often associated with other visible (on plain film) fx

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25
Aging a fracture: First 4-6 wks
MRI (to detect bone marrow edema)
26
Aging a fracture: 6 weeks or more
Bone scan (note: for a child every growth plate will be hot on bone scan)
27
Fatigue/stress fracture #1
MRI (b/c it provides additional info if negative for stress fx)
28
Fatigue/stress fracture #2
Bone scan
29
Disc herniation #1
MRI by a long shot! But it doesn't change clinical outcome so save money and don't bother.
30
Disc herniation #2
CT distant distant second
31
Spinal stenosis #1
MRI (especially required for px with cancer phobia)
32
Spinal stenosis #2
CT
33
Spinal stenosis central and lateral
Central - DDD | Lateral - Facet OA
34
Finding OPLL
CT
35
Impact of OPLL on neural structures
MRI
36
OPLL on imaging sequences
Dark because of calcium
37
Imaging with suspicion of pathology involving Calcium
CT
38
Thyroid lesions #1
Ultrasound (when using repeated assessments to track changes)
39
Thyroid lesions #2
MRI (image thyroid NOT C-spine)
40
Osteoporosis #1
DEXA
41
Osteoporosis #2
Quantitative CT (hard to justify expense and radiation)
42
Suspicion of skeletal METS #1
Bone scan (b/c we can see entire body with one study)
43
Suspicion of skeletal METS #2
MRI (for areas of known lesions b/c we can only image one area at a time)
44
High confidence in suspicion of METS
Bone scan
45
Not confident in suspicion of METS
Fat suppressed MRI
46
Following METS #1
PET scan (see all tissues at once)
47
Following METS #2
Bone scan: distant second | b/c only valuable for bone
48
Following METS #3
MRI: less sensitive than PET scan | only valuable if you know exactly where the lesion is
49
Px has localized lesion or history of aggressive tumor
Bone scan
50
Not suspecting METS and trying to decide whether or not its aggressive
MRI
51
Evaluating compression fracture
EQUAL: Bone scan/lab work & MRI
52
MRI: use contrast when
1. Tumor 2. Suspicion of infection 3. Prior surgery (scar tissue)
53
Cause of compression fracture
1. Osteoporosis 2. METS 3. Multiple myeloma Bone scan + lab work allows for ddx btwn the three
54
AVN
50% adults bilateral, 15% kids bilateral
55
AVN #1
MRI clearly #1
56
AVN #2
CT
57
AVN #2.5
Bone scan
58
Osteochondritis dessicans
aka Osteochondral defect | Start with plain film; confirm with MRI
59
Septic arthritis #1
MRI by far the best
60
Septic arthritis #2
EQUAL: CT & bone scan
61
Cord tumors
MRI
62
Bone & MSK soft tissue tumors #1
MRI (unless ddx includes Ca lesions; then CT #1)
63
Bone & MSK soft tissue tumors #2
CT close second
64
Active/inactive pars defects #1
MRI
65
Active/inactive pars defects #2
SPECT distant second
66
Active pars defect aka
Pedicle stress fracture
67
Inactive pars defect aka
fibrous non-union
68
Muscle/tendon/ligament injuries in extremities #1
MRI clear first choice
69
Muscle/tendon/ligament injuries in extremities #2
Ultrasound distant second
70
Labral & meniscal & articular cartilage damage
MRI
71
Meniscal tears type 1
Circular areas of increased signal that represent degeneration (OA)
72
Meniscal tears type 2
Linear band of signal that does not extend to the articular surface (predisposed to tear)
73
Meniscal tears type 3
True tear; linear band of increased signal that extends to at least one articular surface
74
Syringomyelia
MRI
75
Chest lesions
CT; high resolution/aka thin section
76
GI & abdomen imaging
CT; transaxial with contrast (diluted barium?), or helical
77
AAA #1
Ultrasound
78
AAA #2
CT
79
AAA #3
MRI
80
Thoracic aneurysm
CT first choice
81
Pancreas
EQUAL: CT=US=MRI | Ultrasound most common
82
Gall bladder #1
Ultrasound clear first choice
83
Gall bladder #2
EQUAL: CT=MRI
84
Liver #1
EQUAL: CT=MRI
85
Liver #3
Ultrasound
86
Kidney (IV contrast 3% iodine)
EQUAL: US=CT=MRI
87
Kidney FUNCTION assessment
Intravenous pyelogram (IVP) gives more info regarding function
88
Female pelvis #1
Ultrasound
89
Female pelvis #2
EQUAL: CT=MRI
90
Testicles #1
Ultrasound
91
Testicles #2
MRI
92
Prostate #1
Ultrasound; endorectal
93
Prostate #2
MRI
94
Prostate imaging needed when
+DRE and elevated PSA

Advanced Imaging (3 decks)

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