Pulmonary Imaging Flashcards
(28 cards)
Benefits of CTA
Provide info on vessel anatomy and guidance for surgeons, less invasive, safer
Benefits of MRI
No radiation, high quality images Useful in Dx hilar and mediastinal diseases
Invasive study used to dx heart disease, PE, DVT, brain bleeds
angiography
Risks and limitations of MRI
Less detailed view of parenchyma, claustrophobia, cannot scan pts with implants, cannot use contrast with kidney dx
Benefits of PET scan
Can detect changes before they show up on CT or MRI, short lived radioactivity
Evaluates vasculature of brain, kidney, lungs, heart, neck, etc. Used with other modalities
Angiography
Risks of CXR
Cumulative radiation exposure Risk in pregnancy Limited use if small CA/PE
CT is useful in dx of
CA, trauma
Uses isotopes via IV and vent infusion, used for PE dx and estimating post-op function in lung resection
VQ scan
Benefits of VQ Scan
allergic rxn is rare, low radiation compared to films
Risks and limitations of PET scan
Can give false positive with cocci or histoplasmosis, time sensitive
What can CXR evaluate?
Pulmonary parenchyma, pleura, airways, mediastinum
ABCs of CXR
Airway Breast shadow, bones Cardiac shadow, costophrenic angles Diaphragm Edges, extrathoracic tissues Fields, failure
More detailed, real time imaging useful in biopsies
CT
Evaluates CA and effects of therapy based on biochemical changes.
PET scan
Used to assess perfusion vs ventilation
VQ scan
CTA is useful in evaluating
PE, artery malformation, CA
Benefits of CXR
Low radiation Inexpensive Convenient, cheap and easy
Rarely used, can differentiate vasculature from other structures
MRI
Risks and limitations of CTA
Contrast allergy, nephrotoxiticity
Benefits of CT
Fast, painless, non-invasive, detailed, moderate cost
CTA evaluates
PE, pulmonary arteries, AVM, arterial invasion by neoplasm
PET scan is useful in dx
CA, fungal infection
Secondary study that requires contrast
CTA
