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Flashcards in Radiology Deck (33):
1

CXR is best initial test for

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

2

How man ribs in NL on CXR in inspiration

10-11

3

What should the pt do to better visualize PTX

Exhale

4

Important for PA films

Pt must be standing/Able to stand
Therefore pt is likely stable

5

CXR on unstable pts

AP - lying down, esp in ICU

6

Difference between AP and PA

Heart is bigger on AP

7

When to do decubitus CXR

Evaluate pleural effusion
Pt lies on each side, and effusion will freely move

8

What do we do instead of lordotic CXRs

Chest CT

9

When to do lateral CXR

Determine precise location of lesion seen in PA

10

Best initial test for pleural effusion

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

11

Only time to do ABD XR

Ileus or SBO - multiple air fluid levels

12

The ONLY time to ABD XR for evaluation of stones

Emergency when U/S or CT are not available

13

Imaging for Bowel perforation

Upright CXR

14

Best initial test for osteomyelitis

Bone XR - elevation of periosteum

15

When to do MRI or bone scan for osteomyelitis

XR shows nothing
XR takes 2 weeks to become abnormal

16

When is skull XR the right answer

Never

17

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

Severe head trauma
Stroke
Intracranial bleeding

18

When is head CT w/ contrast used

Cancer and Infection
BIT for any kind of intracranial mass lesion

19

Important points about CT w/ contrast

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

20

Essential when doing ABD CT

Oral and IV contrast

21

What is ABD CT good for

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

When is Chest CT the answer

Hilar nodes
Mass lesions
Cavities
Interstitial lung disease
Parenchymal lung disease
PE

23

What is MRI used for

Most accurate test of all CNS disease (except hemorrhage)

24

When is MRI the answer on the test

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

25

With CA and infection what is the most accurate test

Bx

26

When is U/S the answer

Gallbladder disease
Renal disease
Gyn organs
Prostate (transrectal)

27

Endoscopic U/S is the most accurate test for

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

28

What is HIDA for

Cholecystitis

29

What is a bone scan for

CA mets
Not nearly as specific as MRI

30

What is Gallium scan for

Fever of unknown origin
Checks Fe metabolism

31

What is Indium scan for

Fever of unknown origin in ABD
Tagged WBCs

32

What is V/Q scan for

PE
Replaced by Spiral CT

33

What is MUGA for

EF