100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
ARDMS SPI STUDY GUIDE QUESTIONS & ANSWERS SCORED A+ CA$12.10   Add to cart
Quickly navigate to
Preview
  2.  
  3. ARDMS SPI
  4.  
  5. ARDMS SPI

Exam (elaborations)

ARDMS SPI STUDY GUIDE QUESTIONS & ANSWERS SCORED A+
 7 views  0 purchase
  • Course
  • ARDMS SPI
  • Institution
  • ARDMS SPI

Spatial Pulse Length is directly proportional to - ️️the Number of Cycles in the Pulse and the Wavelength (Directly Proportional means that increased SPL will increase both the number of cycles in the pulse and the wavelength if increased). Spatial pulse length is inversely proportional t...

[Show more]

Preview 3 out of 16  pages

Document information

  • October 29, 2024
  • 16
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • ardms spi

Written for

  • ARDMS SPI
  • ARDMS SPI

Seller

avatar-seller
PatrickKaylian

Reviews received

Content preview

ARDMS SPI STUDY GUIDE
Spatial Pulse Length is directly proportional to - ✔️✔️the Number of Cycles in the
Pulse
and
the Wavelength

(Directly Proportional means that increased SPL will increase both the number of cycles
in the pulse and the wavelength if increased).


Spatial pulse length is inversely proportional to - ✔️✔️Frequency (MHz)

(Inversely Proportional means that increased SPL will lower frequency. This is because
axial resolution is better with lower frequency)

In soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will...
- ✔️✔️Remain the Same because stiffness and density affect Propagation Speed.

What is the audible range? - ✔️✔️20-20,000Hz

>20,000Hz=Ultrasound

Frequency is measured in - ✔️✔️Hertz (Hz)
is
Cycles per Second

Not affected by sonographer

Increase Frequency; Decrease Depth

A period is the length of time it takes for - ✔️✔️one complete wavelength to pass a
fixed point

PRP is determined by - ✔️✔️Transmit time and receive time.

Period is measured in - ✔️✔️Time (μs)

When the sonographer changes the imaging depth what parameters are changed? -
✔️✔️PRP, PRF, Duty Factor

What is duty factor? - ✔️✔️The percentage or fraction of time that the system is
transmitting a pulse (Time Sound is ON or ON-Time).

,Propagation Speed in SOFT TISSUE - ✔️✔️1.54 mm/μs
(1540 m/sec)

Unit of measurement for Pulse Duration, Duty Factor, PRP, and Period - ✔️✔️Time,
(μs)

Pulse duration is determined by - ✔️✔️Sound Source Only

Pulse Duration is controlled by - ✔️✔️the ultrasound system and transducer

Pulse Duration Formula - ✔️✔️pulse duration (μs) = # cycles in pulse/frequency(MHz)

PD= Number of cycles in Pulse/ Frequency(Hz)

Spatial Pulse Length (SPL) (measurement) - ✔️✔️The distance that a pulse occupies
in space from the start to the end of a pulse.
(mm)

Typical values for spatial pulse length in soft tissue. - ✔️✔️0.1 to 1.0 mm

Spatial pulse length is determined by - ✔️✔️sound source and medium


Pulse Duration (PD) - ✔️✔️The actual time from the start of a pulse to the end of that
pulse; a single transmit, talking, or "on" time.
Time the pulse is on typically measured in (ms).

Pulse Length - ✔️✔️The distance of the pulse start to end or the
duration or length of a single pulse
Pulse Length is typically measured in (mm).

the ability of an object to resist compression and relates to the hardness of a medium? -
✔️✔️Stiffness.

Think:
↑ Stiffness ↑ Speed
↓ Density ↑ Speed

An increase in pulse repetition frequency would lead to: - ✔️✔️Increasing pulse
repetition frequency, increases duty factor.

↑ PRF ↑ Duty Factor

, Which of the following would have the highest propagation speed? - ✔️✔️Bone has the
highest propagation speed, at 2000-4000 m/s.

What has the lowest propagation speed? - ✔️✔️air technically has the lowest
propagation speed at 300 m/s

Which has the Slowest Propagation Speed?
Water
Soft Tissue
Bone
Lung tissue - ✔️✔️Lung Tissue

As imaging depth increases, the pulse repetition frequency (PRF) must: -
✔️✔️Decrease

As imaging depth increase, pulse repeition freqency (PRF) decreases.

↑ Imaging Depth ↓ PRF

What describes the amount of refraction that occurs at an interface? - ✔️✔️Snell's law

Refraction: the redirection of the transmitted sound beam

Snell's law describes the angle of transmission at an interface based on the angle of
incidence and the propagation speeds of the two media.

Pressure is typically expressed in: - ✔️✔️Pascals (Pa)

The typical range of frequency for diagnostic ultrasound imaging is - ✔️✔️1-20 Mhz is
the typical range of frequency for diagnostic ultrasound imaging.

The attentuation coefficient in soft tissue is equal to: - ✔️✔️Attentuation Coeffcient =
1/2 (one half of the frequency in soft tissue)

The attentuation coeffcient (in dB/cm) is the rate at which sound is attentuated per unit
depth.

Micro is denoted as: - ✔️✔️Micro is denoted as millionth (µ)

What is described as the distance over which one cycle occurs? - ✔️✔️Wavelength is
distance over which one cycle occurs, or the distance from the beginning of one cycle to
the end of the same cycle.

Remember, it asks for distance over which one cycle occurs.

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 PatrickKaylian. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$12.10. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

79202 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

Recently viewed by you

Exam (elaborations) ·

(0)

MVU Nurse 629 exam 1 solved 100% correct!

CA$12.10
  • (0)
  Add to cart