Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/30

Click to flip

30 Cards in this Set

  • Front
  • Back
what is the hounsfield unit measurement of air
-1000
hat is the hounsfield unit measurement of fat
-120
what is the hounsfield unit measurement of water
0
what is the hounsfield unit measurement of muscle
40
what is the hounsfield unit measurement of contrast
130 and higher

(depends on the contrast barium is much higher)
what is the hounsfield unit measurement of bone
400
bone window for neck
350/1800
What is a good CT angio window for code brain
200/800
100/800
What is a good window to look for spine disc herniation
100/400
Fatty Liver on contrast enhanced study
When hepatic attenuation numbers are 20 or more Hounsfield units less than the spleen on a post contrast (delayed) scan, a fatty liver can be diagnosed with relative confidence
Normal liver
50-70
Hounsfield liver to spleen
On a non-contrast when the spleen is more than 10 Hounsfield units brighter than the liver, a fatty liver can be diagnosed with confidence
Serous Ascites
-10 to 10
Exudative ascites
>15
ascites with hemorrrhage
>45
Hounsfield units of blood
40
Active Bleeding

blood
80-130 HU
Hemoperitoneum

blood
35-40HU
Sentinel Clot

(clotted blood next to adjacent lacerated organ)
>60
Gallbladder fluid
normally less than 20 HU (if more it may be sludge, hemorrhage, pus, or stones)
Pancreas
40 HU (approximately equal to muscle)
Speen
40-60 HU unenhanced

(5-10 less than liver)
Simple Renal Cyst
-10 to 15 HU
Adrenal adenoma
less than 10HU on non-enhanced CT (95% sensitive)
adrenal myelolipoma
-30 to -100
What is the typical HU of a phlegmon
greater than 20
What is the typical HU of an abscess
less than 20
Acute hemorrhage
50 to 90 HU and then density will decrease
CT angiogram chest main pulmonary artery for quality study
180 hu in the main pulmonary artery
Hemochromatosis
75-130HU