100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Ultrasound Physics (SPI) Review Questions + Answers Graded A+ CA$12.10   Add to cart

Exam (elaborations)

Ultrasound Physics (SPI) Review Questions + Answers Graded A+

 6 views  0 purchase
  • Course
  • Ultrasound Physics
  • Institution
  • Ultrasound Physics

Definition of Duty Factor? - ️️The percentage of time the pulse is on -Unitless (just a number) -For continuous wave, duty factor = 100% -For pulsed wave, Duty Factor is less than 1% What are the two types of Ultrasound Waves? - ️️1.) Electromagnetic - Wave travels through a vacuum. 2...

[Show more]

Preview 3 out of 17  pages

  • October 29, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Ultrasound Physics
  • Ultrasound Physics
avatar-seller
Ultrasound Physics (SPI) Review
Definition of Duty Factor? - ✔️✔️The percentage of time the pulse is on
-Unitless (just a number)
-For continuous wave, duty factor = 100%
-For pulsed wave, Duty Factor is less than 1%

What are the two types of Ultrasound Waves? - ✔️✔️1.) Electromagnetic - Wave
travels through a vacuum.
2.) Mechanical - Wave must travel through a medium.

Meaning of Anechoic? - ✔️✔️Dark, less echos.

Meaning of Echogenic? - ✔️✔️Full of echoes.

Meaning of Hyperechoic? - ✔️✔️More echoes than adjacent tissue.

Meaning of Hypoechoic? - ✔️✔️Less Echoes than adjacent tissue.

Meaning of Isoechoic? - ✔️✔️Similar/same echoes than adjacent tissue.

Meaning of Homogenous? - ✔️✔️Uniform Texture. (smooth)

Meaning of Heterogenous? - ✔️✔️Different levels of echogenicity.

Definition of Wavelength? - ✔️✔️The length of one cycle.
-Denoted by (Lamda)

Unit for Wavelength? - ✔️✔️m, cm, mm

Definition of Propagation Speed? - ✔️✔️The speed at which sound travels through a
medium

Unit for Propagation Speed? - ✔️✔️m/s or mm/microseconds

Propagation Speed depends on? - ✔️✔️Density, Stiffness.

Definition of Density? - ✔️✔️Concentration of matter.
-Inversely related to prop speed.

Definition of Stiffness aka "Bulk Modulus"? - ✔️✔️The resistance of a medium to
compression.
-Stiffness is directly proportional to speed.

,What are two kinds of Mechanical Waves? - ✔️✔️A.) Transverse
B.) Longitudinal

Ultrasound images are made up of typically how many scan lines? - ✔️✔️128 - 256
scan lines.
(more the better resolution)

Scanning format for Sector (shape)? - ✔️✔️Pie Shaped, Scan lines originate from the
same location and spread out as they travel.
.
/\
/\

Scanning format for Modified Sector? - ✔️✔️Scan lines originate from different points,
but close together.
///\\\
/// \\\

Scanning format for Linear? - ✔️✔️Scan lines originate from different points and travel
parallel to each other. |||||||
|||||||

Definition of PRF? - ✔️✔️-Pulse Repetition Frequency
-The number of cycles per second. (including listening time)

Units for PRF? - ✔️✔️Hz, kHz, MHz

Formula for PRF? - ✔️✔️PRP=__1__
PRF

Definition of PRP? - ✔️✔️-Pulsed Repetition Period
-The time from the beginning of one pulse to the beginning of the next pulse.

Units for PRP? - ✔️✔️s, ms, microseconds

Formula for PRP? - ✔️✔️PRP=__1__
PRF

Definition of Pulse Duration? - ✔️✔️The time the pulse is on.

Unit for Pulse Duration? - ✔️✔️Microseconds

, Formula for Pulse Duration? - ✔️✔️PD = n x T

Definition of SPL? - ✔️✔️-Spatial Pulse Length
-The length of one pulse

Unit for SPL? - ✔️✔️mm

Formula for SPL? - ✔️✔️SPL = n x (lamda) aka Wavelength


Formula for Duty Factor? - ✔️✔️DF = __PD__
PRP

Definition for Bandwidth? - ✔️✔️The range of frequencies found in a pulse.
-The shorter the pulse, more frequencies.

Definition for Fractional Bandwidth? - ✔️✔️Describes how large BW is compared to
frequency
-Unitless

Definition for Quality Factor? - ✔️✔️Way to rate a transducer, Quality of the transducer.
-The lower the QF, the better transducer.

Formula for Quality Factor? - ✔️✔️QF = __Fo__
BW

Definition of Power? - ✔️✔️The rate that work is performed.
-The rate of energy transfer

Units for Power? - ✔️✔️Watts (w, mw, Mw)

Formula for Power? - ✔️✔️P (proportional too) a²
P = Power
a = Amplitude

Definition of Amplitude? - ✔️✔️The maximum variation of a wave.
-The strength of a wave.
-Amplitude decreases as it travels through the body.

Unit for Amplitude? - ✔️✔️dB (decibels)
Pa (pascals)

Definition of Intensity? - ✔️✔️The concentration of energy.
-Depends on power and area.

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


CA$12.10
  • (0)
  Add to cart