Question 1

The echo pattern of a cyst can be referred to as:&#10;A) echogenic.&#10;B) anechoic.&#10;C) hyperechoic.&#10;D) hypoechoic.

Accepted Answer

A cyst typically appears as anechoic on an ultrasound, meaning it has no echoes and appears black. Echogenic refers to a structure that produces echoes, hyperechoic means it produces more echoes than the surrounding tissue, and hypoechoic means it produces fewer echoes than the surrounding tissue. However, a cyst is usually anechoic and does not fit any of these descriptions.

Question 2

Hertz measures:&#10;A) cycles per second.&#10;B) amplitude of an echo.&#10;C) number of waves.&#10;D) wavelength.

Accepted Answer

Hertz is a unit of measurement for frequency, which is expressed as the number of cycles per second.

Question 3

Sometimes examinations in the abdominal cavity are difficult to perform because of:&#10;A) air or gas in the gastrointestinal tract.&#10;B) bony anatomy.&#10;C) tissue differences.&#10;D) too much fluid.

Accepted Answer

Air or gas in the gastrointestinal tract can obstruct the view of the abdominal cavity during an examination, making it difficult to perform.

Question 4

A full bladder is used for imaging the female pelvis as a sonic window and to also:&#10;A) flatten the vagina.&#10;B) reposition the intestines laterally.&#10;C) distend the uterus.&#10;D) flatten the ovaries.

Accepted Answer

A full bladder is used to reposition the intestines laterally for better visualization of the uterus and ovaries during pelvic imaging. It does not flatten the vagina or distend the uterus, and flattening the ovaries is not a desired outcome.

Question 5

A normal liver scan should have a _____ echo pattern.&#10;A) hyperechoic&#10;B) hypoechoic&#10;C) homogeneous&#10;D) heterogeneous

Accepted Answer

A normal liver scan should have a homogeneous echo pattern, meaning that the liver tissue should have a consistent level of echogenicity (brightness) throughout the entire organ. Hyperechoic and hypoechoic patterns indicate abnormal tissue density, while a heterogeneous pattern suggests the presence of different tissue types or irregularities within the liver.

Question 6

Sound is attenuated by:&#10;A) soft tissue.&#10;B) fluid-filled structures.&#10;C) most bony structures.&#10;D) solid organs.

Accepted Answer

The answer of Sound is attenuated by:&#10;A) soft tissue.&#10;B) fluid-filled...

Question 7

The frequency for diagnostic ultrasound is in the range of:&#10;A) 2 to 320 Hz.&#10;B) 20 to 20,000 Hz.&#10;C) 100,000 Hz to 1 MHz.&#10;D) 1 to 10 MHz.

Accepted Answer

Diagnostic ultrasound typically uses frequencies in the range of 1 to 10 MHz, which provides high resolution imaging of tissues and structures in the body. This frequency range allows for detailed imaging of organs, blood vessels, and other structures, while minimizing interference from air and bone. Frequencies outside of this range may be used for therapeutic ultrasound applications or in other ultrasound imaging modalities.

Question 8

The principle on which the ultrasound transducer operates is the _____ effect.&#10;A) photoelectric&#10;B) crystalline&#10;C) piezoelectric&#10;D) transducer

Accepted Answer

The piezoelectric effect is the principle on which ultrasound transducers operate. This effect involves the conversion of electrical energy to mechanical energy and vice versa in certain materials, such as piezoelectric ceramics or crystals, when subjected to an applied voltage or pressure. This produces high-frequency sound waves that can be used for medical imaging, industrial testing, and other applications.

Question 9

Routine obstetric screening exams are usually requested between _____ gestational weeks.&#10;A) 8 and 12&#10;B) 12 and 16&#10;C) 16 and 24&#10;D) 24 and 30

Accepted Answer

Routine obstetric screening exams are usually requested between 16 and 24 gestational weeks. At this point, the majority of fetal organ systems have formed and are best visualized on ultrasound. Additionally, this timeframe allows for early detection of potential issues or abnormalities. Screening exams may include the maternal serum alpha-fetoprotein (MSAFP) test, the quadruple screen, a glucose challenge test, and an anatomy ultrasound.

Question 10

The exam to evaluate for deep vein thrombosis and venous insufficiency is:&#10;A) duplex sonography.&#10;B) endovaginal.&#10;C) transabdominal.&#10;D) volume scanning.

Accepted Answer

Duplex sonography is the standard imaging test to evaluate for deep vein thrombosis and venous insufficiency. It combines traditional two-dimensional ultrasound with Doppler ultrasound to evaluate blood flow and detect any abnormalities in the veins. Endovaginal and transabdominal ultrasounds are typically used for pelvic and abdominal imaging, respectively. Volume scanning is not a recognized imaging test for deep vein thrombosis or venous insufficiency.

Question 11

If an echo pattern is similar throughout a structure or mass it is termed:&#10;A) heterogeneous.&#10;B) homogeneous.&#10;C) complex.&#10;D) anechoic.

Accepted Answer

The answer of If an echo pattern is similar throughout...

Question 12

The propagation speed of sound in soft tissue is _____ m/s.&#10;A) 150&#10;B) 330&#10;C) 1020&#10;D) 1540

Accepted Answer

The answer of The propagation speed of sound in soft...

Question 13

Ultrasonic sound waves are:&#10;A) poorly transmitted by liquids.&#10;B) poorly transmitted by solids.&#10;C) reflected at tissue interfaces.&#10;D) constant in speed.

Accepted Answer

The answer of Ultrasonic sound waves are:&#10;A) poorly transmitted by...

Question 14

The velocity of an ultrasound beam is:&#10;A) constant in speed.&#10;B) constant for all solids.&#10;C) determined by the density of material.&#10;D) proportional to frequency cubed.

Accepted Answer

The answer of The velocity of an ultrasound beam is:&#10;A)...

Deck 31: Diagnostic Ultrasound