DMSG1820 Final MODULE 5-9 Exam Questions And Answers (A+) 100% Verified

DMSG1820 Final MODULE 5-9 Exam Questions And
Answers (A+) 100% Verified


Contrast enhancement lasts longest when administering the ultrasound contrast agent
by:

Select one:

a. Mouth

b. Bolus injection

c. Slow infusion

d. Skin contact - ANSWER c. Slow infusion



Currently in the United States, which of the following contrast agents are available and
approved by the U.S. Food and Drug Administration (FDA) for use in echocardiography?

Select one:

a. Definity, Optison, Imagent

b. Levovist, Sonovue, Imagent

c. Imagent, Optison, Sonovue

d. Optison, Sonovue, Definity - ANSWER a. Definity, Optison, Imagent



Depending on the clinical application, vascular UCAs may be administered via:

Select one:

a. Intravenous bolus injection

b. Oral ingestion

c. Intravenous infusion

d. Albumin - ANSWER c. Intravenous infusion

,Evaluation of a patient with known cirrhosis often demonstrates a(n):

Select one:

a. Reduced portal venous flow with an increase in hepatic artery flow.

b. Increase in portal venous flow with an increase in hepatic artery flow.

c. Reduced portal venous flow with a reduction in hepatic artery flow.

d. Increase in portal venous flow with a reduction in hepatic artery flow. - ANSWER a.
Reduced portal venous flow with an increase in hepatic artery flow.



For a vascular ultrasound contrast agent to be clinically useful, it should:

Select one:

a. Be nontoxic

b. Have microbubbles that are small enough to traverse the pulmonary capillary beds

c. Be stable enough to provide multiple recirculations

d. Have all of the above - ANSWER d. Have all of the above



Hepatic cavernous hemangioma demonstrate peripheral enhancement only during the:

Select one:

a. Arterial phase

b. Portal venous phase

c. Late vascular phase

d. None of the above - ANSWER a. Arterial phase



In harmonic-imaging mode, the echoes from the oscillating microbubbles have a:

Select one:

a. Low signal-to-noise ratio

b. Low transducer frequency

c. Equal signal-to-noise ratio

,d. High signal-to-noise ratio - ANSWER d. High signal-to-noise ratio



In the early arterial phase, using tissue-specific contrast agents, focal nodular
hyperplasia can have a similar appearance to a:

Select one:

a. Hepatic cyst

b. Hemangioma

c. Hepatocellular carcinoma (HCC)

d. Hepatic abscess - ANSWER c. Hepatocellular carcinoma (HCC)



Induced acoustic-emission effects are independent of:

Select one:

a. Doppler shifts

b. Microbubble size

c. Contrast motion

d. All of the above - ANSWER c. Contrast motion



Most of the research and development of ultrasound contrast agents (UCAs) has
centered on creating agents that can:

Select one:

a. Enhance the detection of stationary blood

b. Be administered by intra-arterial injection

c. Be administered intravenously

d. Enhance the detection of tumors in solid organs - ANSWER c. Be administered
intravenously



Several reports have described the contrast-enhanced sonographic appearance of
hepatocellular carcinoma as having intense enhancement in the _____________ phase.

Select one:

, a. Late vascular

b. Portal venous

c. Early arterial

d. Late arterial - ANSWER c. Early arterial



The detection of flow in the hepatic capillaries is identified in the ___________ phase.

Select one:

a. Arterial

b. Early vascular

c. Portal venous

d. Late vascular - ANSWER d. Late vascular



The first ultrasound contrast agent to receive FDA approval was used in:

Select one:

a. Biopsy procedures

b. Vascular sonography

c. Echocardiography

d. General sonography - ANSWER c. Echocardiography



The mechanical index (MI) uses:

Select one:

a. Low acoustic output power

b. Lower transducer frequency

c. Increase of dynamic range

d. High acoustic output power - ANSWER a. Low acoustic output power



The microbubble of a first-generation UCA contains which one of the following types of