Pulmonary Imaging

Question 1

Benefits of CTA

Answer 1

Provide info on vessel anatomy and guidance for surgeons, less invasive, safer

Question 2

Benefits of MRI

Answer 2

No radiation, high quality images Useful in Dx hilar and mediastinal diseases

Question 2

Invasive study used to dx heart disease, PE, DVT, brain bleeds

Answer 2

angiography

Question 3

Risks and limitations of MRI

Answer 3

Less detailed view of parenchyma, claustrophobia, cannot scan pts with implants, cannot use contrast with kidney dx

Question 3

Benefits of PET scan

Answer 3

Can detect changes before they show up on CT or MRI, short lived radioactivity

Question 3

Evaluates vasculature of brain, kidney, lungs, heart, neck, etc. Used with other modalities

Answer 3

Angiography

Question 5

Risks of CXR

Answer 5

Cumulative radiation exposure Risk in pregnancy Limited use if small CA/PE

Question 6

CT is useful in dx of

Answer 6

CA, trauma

Question 6

Uses isotopes via IV and vent infusion, used for PE dx and estimating post-op function in lung resection

Answer 6

VQ scan

Question 6

Benefits of VQ Scan

Answer 6

allergic rxn is rare, low radiation compared to films

Question 7

Risks and limitations of PET scan

Answer 7

Can give false positive with cocci or histoplasmosis, time sensitive

Question 9

What can CXR evaluate?

Answer 9

Pulmonary parenchyma, pleura, airways, mediastinum

Question 10

ABCs of CXR

Answer 10

Airway Breast shadow, bones Cardiac shadow, costophrenic angles Diaphragm Edges, extrathoracic tissues Fields, failure

Question 11

More detailed, real time imaging useful in biopsies

Answer 11

CT

Question 11

Evaluates CA and effects of therapy based on biochemical changes.

Answer 11

PET scan

Question 12

Used to assess perfusion vs ventilation

Answer 12

VQ scan

Question 13

CTA is useful in evaluating

Answer 13

PE, artery malformation, CA

Question 15

Benefits of CXR

Answer 15

Low radiation Inexpensive Convenient, cheap and easy

Question 16

Rarely used, can differentiate vasculature from other structures

Answer 16

MRI

Question 18

Risks and limitations of CTA

Answer 18

Contrast allergy, nephrotoxiticity

Question 20

Benefits of CT

Answer 20

Fast, painless, non-invasive, detailed, moderate cost

Question 21

CTA evaluates

Answer 21

PE, pulmonary arteries, AVM, arterial invasion by neoplasm

Question 22

PET scan is useful in dx

Answer 22

CA, fungal infection

Question 23

Secondary study that requires contrast

Answer 23

CTA

Question 24

Risks and limitations of CT

Answer 24

Higher radiation exposure risk Risk with contrast use

Question 26

Secondary study that evaluates tumor extent and tx response, radiotherapy planning

Answer 26

CT

Question 27

Secondary study for CA detection and stages, increased SUV = increased chance of malignancy

Answer 27

PET scan (SUV = standard uptake value)

Question 28

Initial study

Answer 28

CXR