Aquifer - Radiology EXAM Questions & Answers,
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Terms in this set (207)
Reconstructions - processing of the raw CT data
allows for better resolution of the structures [higher
Window vs. resolution and higher contrast]
Reconstruction on CT?
Reconstruction can be done in 3D (ortho) or in a
linear way too (vascular)
What is the total range of -1000 (air) to +1000 (metal) [so range is 2000]
hounsfield units availabe?
What does a typical 256shades (that means each shade of grey covers
computer display show for ~8HU)
greyscale range? What The can only distinguish 17 shades of grey
can the human eye
actually distinguish?
Look at the lateral film
What is a good way to
check diaphragm
Diaphragm will be flat like you can set a ruler down
flattening?
on the edge
What can a poor consolidation or PNA
inspiration/hypoinflation
appear like?
, Sweep or a zig zag down the lung field (both in PA
and lateral views)
look for focal, diffuse, BL asymmetrical,
How to look at the lung interstital/vasc markings, lucencies
fields? (cavity/bullae/PTX),
compare upper and lower and L/R zones
Middle
lower zones
Which hilum should always The LEFT sided hilum should be higher - if its not its
appear higher on the pathological
radiograph?
Size of the heart - the cadiac:thoracic cavity ratio
What to look for with the
LA
heart?
LV
R paratracheal line
Azygous area
What mediastinal lines Azygoesophageal line
should be observed on PA Paraaortic line (all the way down)
film?
If you can see these you need to figure out the reason
why
Quadrant method [above and below the ribs] (the
middle lung section you just
How to look at the bones
on Xray?
also go down the spine looking for abnormalities,
mets, or collapse
When should you START AFTER you have COMPLETELY evaluated the new
looking at OLD films? scan
, The aim is to provide continuously updated evidence-
based algorithms that ensure the safest, most cost-
effective, and most efficient path to radiological
diagnosis or intervention matched to specific variants
of clinical presentations.
What are the ACR
appropriateness criteria?
Federal LAW requires referring physicians to consult
Appropriate Use Criteria (AUC), such as ACR
Appropriateness Criteria, prior to ordering advanced
imaging services (ADIS), including CT, MR, nuclear
medicine, and PET, for Medicare patients.
Older appropriateness rating tables used a numerical
rating scale: • Usually Appropriate = 9, 8, or 7 • May be
Appropriate = 6, 5, or 4 • Usually Not Appropriate = 3,
2, or 1
How are appropriateness
criteria divided/staged? Newer appropriateness rating tables simply use the
three categories: • Usually Appropriate (Green cells in
the table) • May be Appropriate (Yellow cells in the
table) • Usually Not Appropriate (Red cells in the
table)
What lobe of lung is seen The R and L upper lobes
at the apicies?
The visual interface between structures of different
density.
What is the silhouette
sign?
Its actually when a silhouette is LOST that we say its a
"silhouette sign"
When the combined density of the vertebrae and
some source of fluid/consolidation make the
What is spine sign? vertebrae look MORE dense [just like ice over water
accentuates the ice appearing like they have
increased density even though they still the same ice]
Well Elaborated | Already Verified Test |100%
Verified solutions | Latest!!
Save
Terms in this set (207)
Reconstructions - processing of the raw CT data
allows for better resolution of the structures [higher
Window vs. resolution and higher contrast]
Reconstruction on CT?
Reconstruction can be done in 3D (ortho) or in a
linear way too (vascular)
What is the total range of -1000 (air) to +1000 (metal) [so range is 2000]
hounsfield units availabe?
What does a typical 256shades (that means each shade of grey covers
computer display show for ~8HU)
greyscale range? What The can only distinguish 17 shades of grey
can the human eye
actually distinguish?
Look at the lateral film
What is a good way to
check diaphragm
Diaphragm will be flat like you can set a ruler down
flattening?
on the edge
What can a poor consolidation or PNA
inspiration/hypoinflation
appear like?
, Sweep or a zig zag down the lung field (both in PA
and lateral views)
look for focal, diffuse, BL asymmetrical,
How to look at the lung interstital/vasc markings, lucencies
fields? (cavity/bullae/PTX),
compare upper and lower and L/R zones
Middle
lower zones
Which hilum should always The LEFT sided hilum should be higher - if its not its
appear higher on the pathological
radiograph?
Size of the heart - the cadiac:thoracic cavity ratio
What to look for with the
LA
heart?
LV
R paratracheal line
Azygous area
What mediastinal lines Azygoesophageal line
should be observed on PA Paraaortic line (all the way down)
film?
If you can see these you need to figure out the reason
why
Quadrant method [above and below the ribs] (the
middle lung section you just
How to look at the bones
on Xray?
also go down the spine looking for abnormalities,
mets, or collapse
When should you START AFTER you have COMPLETELY evaluated the new
looking at OLD films? scan
, The aim is to provide continuously updated evidence-
based algorithms that ensure the safest, most cost-
effective, and most efficient path to radiological
diagnosis or intervention matched to specific variants
of clinical presentations.
What are the ACR
appropriateness criteria?
Federal LAW requires referring physicians to consult
Appropriate Use Criteria (AUC), such as ACR
Appropriateness Criteria, prior to ordering advanced
imaging services (ADIS), including CT, MR, nuclear
medicine, and PET, for Medicare patients.
Older appropriateness rating tables used a numerical
rating scale: • Usually Appropriate = 9, 8, or 7 • May be
Appropriate = 6, 5, or 4 • Usually Not Appropriate = 3,
2, or 1
How are appropriateness
criteria divided/staged? Newer appropriateness rating tables simply use the
three categories: • Usually Appropriate (Green cells in
the table) • May be Appropriate (Yellow cells in the
table) • Usually Not Appropriate (Red cells in the
table)
What lobe of lung is seen The R and L upper lobes
at the apicies?
The visual interface between structures of different
density.
What is the silhouette
sign?
Its actually when a silhouette is LOST that we say its a
"silhouette sign"
When the combined density of the vertebrae and
some source of fluid/consolidation make the
What is spine sign? vertebrae look MORE dense [just like ice over water
accentuates the ice appearing like they have
increased density even though they still the same ice]
