Nov 21, 2024  
2024 - 2025 Catalog 
    
2024 - 2025 Catalog
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DMS 105W - Ultrasound Physics and Instrumentation I

Credits: 2
Instructional Contact Hours: 2

Introduces the basic acoustic physics including a history of instrumentation, ultrasonic propagation principles, transducer parameters, and basic equipment types.

Prerequisite(s): Must be accepted into the DMS program or have consent of instructor.
Corequisite(s): DMS 100 , DMS 107 , DMS 107L , DMS 108W  
Lecture Hours: 30 Lab Hours: 0
Meets MTA Requirement: None
Pass/NoCredit: No

Outcomes and Objectives  

  1. Demonstrate knowledge of sound waves
    1. Define a sound wave
    2. Give the definition, units and formula (if applicable) for the seven parameters of a sound wave
    3. Identify three parameters that relate to the size of the sound wave
    4. Describe the relationship of power, intensity and amplitude
    5. State the average speed of sound in soft tissue
    6. Define pulsed ultrasound
    7. List the five parameters of pulsed ultrasound and give a definition, units and formula (if applicable) for each
  2. Demonstrate knowledge of ultrasound intensity.
    1. Give the formula for intensity
    2. Describe the four ways to measure intensity
    3. Rate the types of ultrasound intensity from highest to lowest
    4. Identify BUC
    5. Describe a decibel
    6. State the definition and formula for attenuation
    7. Correlate transducer frequency to attenuation
    8. Identify the three processes that make up attenuation
    9. Define Rayleigh scattering
    10. Calculate the attenuation coefficient for a set of parameters
    11. State the definition for half-value layer thickness
  3. Demonstrate knowledge of ultrasound beam transmission
    1. Define the reflection and transmission coefficients
    2. Define reflection and the two parameters needed for reflection to occur
    3. Define refraction and the two parameters needed for refraction to occur
    4. State Snell's law
    5. Describe the Range equation and how it relates to 2-D ultrasound imaging
  4. Demonstrate knowledge of the function and design of an ultrasound transducer.
    1. List the components of a transducer
    2. Describe the material used for the transducer crystal
    3. Describe the use and function for backing material
    4. Describe the use and function for the matching layer
    5. State the formula for transducer frequency
    6. Describe how the backing material relates to the bandwidth of a transducer
  5. Demonstrate knowledge of the production and shape of a sound beam and its effect on resolution.
    1. Describe Huygen’s principle
    2. Diagram the parts of a sound beam used for diagnostic imaging
    3. Describe how an ultrasound transducer is focused
    4. List the four results of focusing a transducer
    5. List factors that affect resolution
  6. Demonstrate knowledge of the various types of resolution related to sonographic system design and imaging.
    1. Define lateral resolution and what it is determined by
    2. Define axial resolution and what it is determined by
    3. Correlate frequency to resolution
  7. Demonstrate knowledge of the types of ultrasound modes and how they apply to diagnostic imaging.
    1. Define and give a visual illustration for the following:
      1. A-mode
      2. M-mode
      3. B-mode
      4. Real-time image



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