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Nov 21, 2024
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DMS 105W - Ultrasound Physics and Instrumentation ICredits: 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
- Demonstrate knowledge of sound waves
- Define a sound wave
- Give the definition, units and formula (if applicable) for the seven parameters of a sound wave
- Identify three parameters that relate to the size of the sound wave
- Describe the relationship of power, intensity and amplitude
- State the average speed of sound in soft tissue
- Define pulsed ultrasound
- List the five parameters of pulsed ultrasound and give a definition, units and formula (if applicable) for each
- Demonstrate knowledge of ultrasound intensity.
- Give the formula for intensity
- Describe the four ways to measure intensity
- Rate the types of ultrasound intensity from highest to lowest
- Identify BUC
- Describe a decibel
- State the definition and formula for attenuation
- Correlate transducer frequency to attenuation
- Identify the three processes that make up attenuation
- Define Rayleigh scattering
- Calculate the attenuation coefficient for a set of parameters
- State the definition for half-value layer thickness
- Demonstrate knowledge of ultrasound beam transmission
- Define the reflection and transmission coefficients
- Define reflection and the two parameters needed for reflection to occur
- Define refraction and the two parameters needed for refraction to occur
- State Snell's law
- Describe the Range equation and how it relates to 2-D ultrasound imaging
- Demonstrate knowledge of the function and design of an ultrasound transducer.
- List the components of a transducer
- Describe the material used for the transducer crystal
- Describe the use and function for backing material
- Describe the use and function for the matching layer
- State the formula for transducer frequency
- Describe how the backing material relates to the bandwidth of a transducer
- Demonstrate knowledge of the production and shape of a sound beam and its effect on resolution.
- Describe Huygen’s principle
- Diagram the parts of a sound beam used for diagnostic imaging
- Describe how an ultrasound transducer is focused
- List the four results of focusing a transducer
- List factors that affect resolution
- Demonstrate knowledge of the various types of resolution related to sonographic system design and imaging.
- Define lateral resolution and what it is determined by
- Define axial resolution and what it is determined by
- Correlate frequency to resolution
- Demonstrate knowledge of the types of ultrasound modes and how they apply to diagnostic imaging.
- Define and give a visual illustration for the following:
- A-mode
- M-mode
- B-mode
- Real-time image
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