Radiology+Social determinants Flashcards
e-densities are?
how many x-rays get through an object
x-rays convert silver halide crystals to what?
silver (black)
order the following in least to most e-dense: contrast agents, soft tissue, calcium, fat, air, metal
air, fat,
Can you distinguish chambers of the heart? why?
Can’t cause same e-densities
PA CXR, heart closer to what?
film
what’s so great about being erect during a PA CXR?
can determine pleural fluid of blood flow distribution in lungs
What do you find in the superior mediastinum?6 things
aortic arch SVC and vessels oesophagus trachea vagus lymph nodes
Whats in the anterior mediastinum? 3 things
fat
thymus
lymph nodes
what’s in the middle/pericardium?
heart
great vessels
phrenic nerves
lymph nodes
what’s in the posterior mediastinum?
oesophagus, descending aorta azygous vein thoracic duct lymph nodes
What happens when you have fluid in the pleural spaces on CXR?
fluid sinks to bases, air rises to apices
CXR by itself is good enough?
need to relate to clinical findings
CT scan doesn’t use film, what does it use?
radiation detector
What kind of contrast agent used in CT?
iodine or barium
what are Hounsfield Units?
Grey Scale numerical for anatomical parts
T/F CT has poorer spatial resolution than plain X-rays?
True!
What’s the number one things that make CT better than x-rays?
better contrast resolution
Can you ever see the aortic root/valve, pulmonary trunk, L atrium, IVC, R pulmonary artery, stomach on CXR?
Nope. But you can on CT! Even more so with contrast dye
Post processing to view the image can be done 3 ways:
different planes
windows
3D virtual model
You can view lungs vs. bones vs. heart with a touch of a button by changing these two things:
Brightness and Contrast
2 cons for CT:
ionizing radiation
expensive
Choose one:
a stressful bad job
or
out of work
out of work.
How many TB deaths per year in the world?
1.4 million
How does TB affect women epidemiologically?
top 3 causes of death in women in develping world
