LAST

Question 1

what are US contrast agents

Answer 1

gas liquid suspensions of biocompatible gas filled microsphere

Question 2

microbubbles are ____ than RBC

Answer 2

smaller

Question 3

As bubbles oscillate they produce

Answer 3

non linear frequencies

Question 4

at a low MI of _________ the oscillartionare no longer synchronized

Answer 4

0.1 to 0.3

Question 5

agent does usually lasts about

Answer 5

4 to 6 minutes

Question 6

typical dose for adults

Answer 6

0.1-0.3 ml

Question 7

first gen contrast agents were

Answer 7

air based

Question 8

2 types of first gen

Answer 8

echovist and levolist

Question 9

where is the focus point in CEUS

Answer 9

posterior part of image. NOT AT AOI

Question 10

anechoic indicates

Answer 10

an area of no blood flow

Question 11

live has ____ phases

Answer 11

3 arterial, portal venous, sinusoidal

Question 12

benign lesions

Answer 12

remain enhanced in late stage

Question 13

malignant lesions,

Answer 13

wash in and out fast, hypo echoic in late phase

Question 14

CEUS on vessels delineates

Answer 14

luminal perfusion

Question 15

starting IV for CEUS is how many gauge

Answer 15

20G

Question 16

how is contrast activated

Answer 16

shaken

Question 17

what is urticaria

Answer 17

Hives