Radiology Flashcards

1
Q

CXR is best initial test for

A

All forms of pulm complaints
- Cough, SOB, CP, sputum, hemoptysis
All forms of physical exam abnormalities
- Rales, rhonchi, wheezing, dullness to perc, chest wall tenderness, tracheal deviation, SVC syndrome

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2
Q

How man ribs in NL on CXR in inspiration

A

10-11

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3
Q

What should the pt do to better visualize PTX

A

Exhale

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4
Q

Important for PA films

A

Pt must be standing/Able to stand

Therefore pt is likely stable

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5
Q

CXR on unstable pts

A

AP - lying down, esp in ICU

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6
Q

Difference between AP and PA

A

Heart is bigger on AP

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7
Q

When to do decubitus CXR

A

Evaluate pleural effusion

Pt lies on each side, and effusion will freely move

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8
Q

What do we do instead of lordotic CXRs

A

Chest CT

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9
Q

When to do lateral CXR

A

Determine precise location of lesion seen in PA

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10
Q

Best initial test for pleural effusion

A
Lateral CXR (can detect 50-75mL)
PA needs 200-300
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11
Q

Only time to do ABD XR

A

Ileus or SBO - multiple air fluid levels

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12
Q

The ONLY time to ABD XR for evaluation of stones

A

Emergency when U/S or CT are not available

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13
Q

Imaging for Bowel perforation

A

Upright CXR

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14
Q

Best initial test for osteomyelitis

A

Bone XR - elevation of periosteum

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15
Q

When to do MRI or bone scan for osteomyelitis

A

XR shows nothing

XR takes 2 weeks to become abnormal

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16
Q

When is skull XR the right answer

A

Never

17
Q

When is head CT w/o contrast the best initial test

A

Severe head trauma
Stroke
Intracranial bleeding

18
Q

When is head CT w/ contrast used

A

Cancer and Infection

BIT for any kind of intracranial mass lesion

19
Q

Important points about CT w/ contrast

A

Never in severe renal failure
Hydrate w/ saline and give bicarb or NAC for mild insufficiency
Stop metformin before giving contrast

20
Q

Essential when doing ABD CT

A

Oral and IV contrast

21
Q

What is ABD CT good for

A
Retroperitoneal structures (PANCREAS)
Appendicitis and other ABD infections
Most accurate test for nephrolithiasis (no contrast)
Masses in ABD organs
Most accurate test for diverticulitis
22
Q

When is Chest CT the answer

A
Hilar nodes
Mass lesions
Cavities
Interstitial lung disease
Parenchymal lung disease
PE
23
Q

What is MRI used for

A

Most accurate test of all CNS disease (except hemorrhage)

24
Q

When is MRI the answer on the test

A
Demyelinating diseases
Posterior fossa lesion
Brainstem
Pituitary
Facial structures
Bone lesions
Spinal cord and vertebral lesions
25
Q

With CA and infection what is the most accurate test

A

Bx

26
Q

When is U/S the answer

A

Gallbladder disease
Renal disease
Gyn organs
Prostate (transrectal)

27
Q

Endoscopic U/S is the most accurate test for

A

Pancreatic lesions (esp in the head)
Pancreatic and billiary ductal disease
Gastrinoma localization

28
Q

What is HIDA for

A

Cholecystitis

29
Q

What is a bone scan for

A

CA mets

Not nearly as specific as MRI

30
Q

What is Gallium scan for

A

Fever of unknown origin

Checks Fe metabolism

31
Q

What is Indium scan for

A

Fever of unknown origin in ABD

Tagged WBCs

32
Q

What is V/Q scan for

A

PE

Replaced by Spiral CT

33
Q

What is MUGA for

A

EF