100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
2024 ARDMS- SPI EXAM WITH CORRECT ANSWERS $24.99   Add to cart

Exam (elaborations)

2024 ARDMS- SPI EXAM WITH CORRECT ANSWERS

 9 views  0 purchase
  • Course
  • ARDMS- SPI
  • Institution
  • ARDMS- SPI

2024 ARDMS- SPI EXAM WITH CORRECT ANSWERS

Preview 4 out of 40  pages

  • November 3, 2024
  • 40
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • a num
  • ARDMS- SPI
  • ARDMS- SPI
avatar-seller
Elitaa
2024 ARDMS- SPI EXAM WITH
CORRECT ANSWERS


The horizontal axis, or x-axis - CORRECT-ANSWERSRuns side to side

The vertical axis, or y-axis - CORRECT-ANSWERSRuns up and down

Unrelated - CORRECT-ANSWERSTwo items that are not associated

Name the 4 synonyms for axial resolution. - CORRECT-ANSWERSlongitudinal,
range, radial, depth resolution

Name the 3 synonyms for lateral resolution. - CORRECT-ANSWERSangular,
azimuthal resolution, and transverse

The length of a pulse is 8 mm. What is the minimum distance between two
reflectors, positioned one in front of the other, that still produces two echoes
on our image? - CORRECT-ANSWERS4 mm (one half the pulse length!)

The frequency of a transducer does not change. If the diameter of the new
piezoelectric crystal increases, what happens to the near zone length? -
CORRECT-ANSWERSincreases

The frequency of a transducer does not change. If the diameter of the new
piezoelectric crystal increases, what happens tot he beam diameter in the far
zone? - CORRECT-ANSWERSdecreases

The frequency of a transducer does not change. If the diameter of the new
piezoelectric crystal increases, what happens to the wavelength? - CORRECT-
ANSWERSno change

The frequency of a transducer does not change. If the diameter of the new
piezoelectric crystal increases, what happens to the beam diameter in the
near zone? - CORRECT-ANSWERSincreases

Narrow beams improve... - CORRECT-ANSWERSlateral resolution

What is A-mode? - CORRECT-ANSWERSAmplitude, series of upward spikes.
(the higher the returning spike, the higher the amplitude) X-axis of a-mode is
depth

,A-modes are accurate in determining _______________. - CORRECT-
ANSWERSthe depth of reflectors

What is B-mode? - CORRECT-ANSWERSBrightness, the brightness of the once
invisible dot indicates the strength of the reflection. (weak reflections appear
as darker gray dots, strong reflections are white dots) X-axis is depth

What was the form form of grayscale imaging? - CORRECT-ANSWERSB-Mode

What is M-mode? - CORRECT-ANSWERSMotion, horizontal wavy lines
represent the changing depth of the reflecting surfaces are produced on the
paper. X-axis = time, Y-axis = depth

What is M-mode primarily used for? - CORRECT-ANSWERSassess the motion
of cardiac walls and structures

What is the only display mode that provides information regarding reflector
motion with respect to time? - CORRECT-ANSWERSM-mode

With A-mode, what does the X-axis display? - CORRECT-ANSWERSdepth of
the reflector

With M-mode, what does the Y-axis display? - CORRECT-ANSWERSdepth of
the reflector

Which mode provides the foundation for real-time, grayscale anatomic
imaging? - CORRECT-ANSWERSB-mode, or brightness mode

With A-mode, what does the Y-axis display? - CORRECT-ANSWERSamplitude
of the reflected signal

In M-mode, what does the X-axis display? - CORRECT-ANSWERStime

With B-mode Which axis is related to the strength of the reflection? -
CORRECT-ANSWERSthe z-axis

How does an ultrasound system create high quality, two-dimensional
images? - CORRECT-ANSWERSTwo characteristics of sound that make it
difficult to create two-dimensional images are: sound travels only in a
straight line, and sound beams must be narrow to optimize lateral resolution.
The use of multiple pulses to create a two-dimensional image overcomes
both of these difficulties.

In a mechanical transducer, the PZT crystal is _______________ to create the
image. - CORRECT-ANSWERSphysically moved

,Mechanical transducer image shape: - CORRECT-ANSWERSfan or sector-
shaped

Mechanical transducers have a _________ focal depth. - CORRECT-
ANSWERSfixed

When there is any damage done to the crystal in a mechanical transducer, -
CORRECT-ANSWERSthe entire image is lost

Array transducers are comprised of... - CORRECT-ANSWERSa single slab of
PZT cut into a collection of separate pieces called elements. Each active
element is connected by a wire to its own electronic circuitry int he
ultrasound system.

The linear phased array has ___ moving parts. And the beam is steered and
focused using an electrical techniques called _________. - CORRECT-
ANSWERSno, phasing

What is the image shape created by a phased array? - CORRECT-
ANSWERSfan or sector-shaped

Elements of a phased array are what shape? - CORRECT-
ANSWERSrectangular and narrow

Sound beams are focused ___________ with linear phased array transducers. -
CORRECT-ANSWERSelectronically

Advantage of phased array systems is: - CORRECT-ANSWERSthe availability
of electronically controlled, adjustable focusing, which allows the
sonographer to match the beam's characteristics to the clinical
circumstances.

Damage to one of the elements of a phased array transducer results in... -
CORRECT-ANSWERSinconsistent or erratic beam steering and focusing.

How many elements in a phased array probe are excited to create a single
sound pulse? - CORRECT-ANSWERSAll the active elements in a linear phased
array probe are fired to create each sound beam.

What is the beam former? - CORRECT-ANSWERSthe electronics within the
ultrasound system that create the voltages to the transducer element

When the spike line is straight, an ____________ is created. - CORRECT-
ANSWERSunfocused sound beam

, How does the pattern of electrical spikes from the beam former focus the
sound beam during transmission? - CORRECT-ANSWERSWhen the outer
crystals are excited earlier than the inner crystals, the curved pattern
creates a focused sound beam. This means the beam will be directed
straight ahead.

Brightness of the display is affected by? - CORRECT-ANSWERSReceiver
amplification (gain)

Acoustic speckle is an artifact produced by what? - CORRECT-
ANSWERSinterference of tiny acoustic wavelets

Side lobe artifact is a result of what condition? - CORRECT-ANSWERSAcoustic
energy radiating in a direction different than the main axis of the beam


Related or Proportional - CORRECT-ANSWERSTwo items that are associated
or affiliated
However, the relationship between the items does not have to be specified

Directly related or Directly proportional - CORRECT-ANSWERSTwo items that
are associated such that when one item increases, the other increases

Inversely related or inversely proportional - CORRECT-ANSWERSTwo items
are associated such that when one item increases, the other decreases

Reciprocal Relationship - CORRECT-ANSWERSWhen two numbers with a
reciprocal relationship are multiplied together, the result is one
Reciprocal numbers are inverse because when one increases, the other
decreases

For a numerical answer to a question to be comprehensive, it requires a -
CORRECT-ANSWERSUnit

"Increase by a factor" means - CORRECT-ANSWERSTo multiply by that
number

"Decrease by a factor" means - CORRECT-ANSWERSTo divide by that number

Scientific or engineering notation is a shorthand manner to represent what
types of numbers? - CORRECT-ANSWERSVery large or very small numbers

A number in scientific notation form with a positive exponent has a value -
CORRECT-ANSWERSGreater than 10

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller Elitaa. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $24.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

67163 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$24.99
  • (0)
  Add to cart