5Lactivity - Doing Most of the Good Stuff of an Ultrasound Medical Imager

Last updated almost 4 years ago

17 questions

Background

Required

Coding our Ultrasound Imager

Required

Left Knee

Required

Right Knee

Required

Ultrasound Imaging Questions

Required

5Lactivity - Doing Most of the Good Stuff of an Ultrasound Medical Imager

Last updated almost 4 years ago

17 questions

Background

Required

Choose the highlighted parts that are evidence the knee is injured.

Background on the patient: The patient, while planting their right leg for a corner kick, heard a popping sound from the front of their knee and immediately fell to the ground in pain. It has been about 45 minutes since the injury and pain has decreased only a small amount, the right knee has significant swelling and the patient says it feels unstable.

μs= microsecond 
There are 1,000,000 (one million) μs in 1 second.

Background on the ultrasound medical imager: The transducer has ten lines that are spaced 5 mm apart. Each line emits an ultrasound pulse at a frequency of 6 MHz (6 million waves/second or 6 waves/μs). These pulses travel at the speed of sound in the human body which has an approximate wave speed of 1.5 millimeter/microsecond (mm/μs). The diagrams below show the raw data of the transit time of the return signals to the transducer for each of the 10 lines.

Required

What is the frequency of the ultrasound medical imager?

Coding our Ultrasound Imager

Required

Sort the "Storyboard of our Code" steps into the correct order.

Paste results back into Formative
Computer colors each pixel based on their relative value (0, 1, 2, 3)
"Computer’s signal processor" digitizes the analog signal, (we convert the amplitude of the reflected wave into a number between 0 - 3)
Transducer waits for reflections to come back (input → time)
Transducer emits signal (input → wave velocity = 1.5 mm/μs)
Computer calculates what depth that reflection is from (depth = wave velocity * time travelled / 2) and puts the digitized amplitude value (number) there

Click this link to open the Google spreadsheet: 

4CW3- Starting Spreadsheet with Support for Coding Doing Most of the Good Stuff of an Ultrasound Medical Imager. If you need extra help, use the video below.

Left Knee

Left Knee
Use the Raw Data image showing the reflection of ultrasound in the left knee to assign a number from 0 to 3 that matches the line and transit time for the echo.

Required

Add a screenshot of your Left Knee "Raw Line Data" results.

Required

Add a screenshot of your Left Knee "Ultrasound" image results.

Right Knee

Right Knee
Use the Raw Data image showing the reflection of ultrasound in the right knee to assign a number from 0 to 3 that matches the line and transit time for the echo.

Required

Add a screenshot of your Right Knee "Raw Line Data" results.

Required

Add a screenshot of your Right Knee "Ultrasound" image results.

Ultrasound Imaging Questions

Required

Explain how you used your sonograms to diagnose the health or injury of the patellar tendons in the right and left knees.

In your response, be sure to include specific evidence from your sonogram results compared to the anatomical diagram below and explain how the sonogram shows the injury or health of each knee.

Required

The left patellar tendon appears to be __________.

Required

The right patellar tendon appears to be __________. 

Required

How close to the skin is the patellar tendon? (Hint: what is the smallest depth)

Required

What is the deepest point on the kneecap?

Required

Where was the largest reflection?

Required

For your previous response, why was the reflection largest there?

Required

Why do we need to use gel between the ultrasound wand (transducer) and the patient’s skin?

Required

Different frequencies are used to image different parts of the body depending on the type of tissue, the presence of bones, and the desired resolution level. The resolution (the smallest object that can be seen clearly) is about the wavelength of the sound wave used.

With the information previously provided about the ultrasound machine, estimate the resolution of the ultrasound imager in this setting, including units of measurement.

wavelength = \ \frac{wave\ velocity}{frequency}

Required

What are two things you could do to increase the resolution of this ultrasound imager?

Hint: Resolution is about the wavelength of the sound wave used. Think about what a higher resolution means in terms of the resulting wavelength you calculated. Do you want that number to be smaller or larger? What can you change about the ultrasound imager to change that value?