Introduction to Medical Imaging

Your guide to the history, science, math, and economics of medical imaging systems (e.g., X-ray, CT, MRI, Ultrasound)
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  • Lectures 26
  • Length 4 hours
  • Skill Level All Levels
  • Languages English
  • Includes Lifetime access
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    Available on iOS and Android
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About This Course

Published 8/2015 English

Course Description

Introduction to Medical Imaging is both a beginner's guide and an expert's cheat sheet to the history, science, math, and economics of medical imaging systems. The course will cover common imaging methods used in hospitals today -- i.e., x-ray, CT, MRI, and ultrasound -- as well as discuss emerging techniques, such as photoacoustic imaging. The basic principles, instrumentation, and applications of each imaging modality will be presented with interactive lectures and comprehensive quizzes from an enthusiastic and knowledgeable instructor. Assignments will test theoretical knowledge and demonstrate practical applications. The course will take approximately 5 hours to complete. Upon completion, you will command respect from your healthcare provider as a knowledgeable patron of medical imaging procedures.

What are the requirements?

  • A basic math and science background would be helpful.
  • Familiarity with introductory physics, chemistry, trigonometry, and algebra would make some elements of this course more enjoyable. However, no experience with one or more of these subjects should not be a deterrent.

What am I going to get from this course?

  • Master the fundamentals of medical imaging systems
  • List common uses of x-ray, CT, MRI ultrasound, and photoacoustic imaging
  • Know the primary advantages and disadvantages of each method
  • Understand the comparative costs
  • Look at any medical image and determine if it was created using one methods covered in class
  • Excel in academic, medical, and/or clinical programs requiring this basic knowledge

What is the target audience?

  • This course provides a general overview for students not familiar with medical imaging, as well as students who need a refresher.
  • Pre-Medical Students
  • Medical Students
  • Nursing Students
  • Grad Students embarking upon imaging research
  • Undergraduates thinking about joining an imaging lab
  • High School Students (advanced) desiring to connect basic math and science courses to real-world applications
  • Healthcare Professionals who want to appear knowledgeable to their patients
  • Engineering Professionals and Technicians seeking a general overview of medical imaging systems
  • None of the above, but you or someone you know previously had or will have an ultrasound, x-ray, CT, or MRI, and you have a genuine interest in learning what happens to the human body during one or more of these procedures
  • Note: This course is not for you if you are an expert in medical imaging, seeking to learn novel imaging theories and/or obtain an exhaustive list of current and potential clinical applications.

What you get with this course?

Not for you? No problem.
30 day money back guarantee.

Forever yours.
Lifetime access.

Learn on the go.
Desktop, iOS and Android.

Get rewarded.
Certificate of completion.

Curriculum

Section 1: Overview
02:11

Overview of course goals and expectations

11:23

This lecture includes the following key topics:

  • Noninvasiveness of Imaging
  • Medical Imaging Theory
  • Timeline of Medical Imaging
  • Temporal and Spatial Resolution
  • Cost Comparisons
5 questions

Test your knowledge about basic principles all medical imaging scientists understand

Section 2: Projection X-Ray Imaging
00:59

Detailed overview of section on projection x-ray imaging. The remaining sections follow this same general outline.

10:52

This lecture includes the following key topics:

  • EM Radiation
  • Atomic Structure
  • Electron Structure
  • Ionization
  • X-Ray Interactions with Matter
  • Compton Scattering Equation
15:17

This lecture includes the following key topics:

  • X-ray Tubes
  • Image Formation
  • Collimator
  • Anti-Scatter Grid
  • Image Examples
  • Adverse Effects
  • Dose and Dose Rate
  • Geiger Counter
  • Protective Equipment
  • Pros & Cons
13 pages

Have you or someone you know ever had a broken bone? This lecture describes how some bone fractures are classified using x-ray images.

Projection X-ray
6 questions
Section 3: Computed Tomography (CT) Imaging
09:44

This lecture includes the following key topics:

  • CT Slice Nomenclature
  • Pixels vs. Voxels
  • Projection vs. Tomography
  • Equipment
  • Imaging Methods
  • Sinogram
06:14

Stretch your mind with this lecture and try to predict the appearance of different sinograms for different geometrical targets.

10:08

Learn radon transform math and and apply it to algebraic matrix reconstruction principles to make your very own 4-pixel CT image

Represent your CT data using g(R,theta) notation
7 questions
13:06

This lecture includes the following key topics:

  • Backprojection
  • Filtered Backprojection
  • Image Formation Recap
  • Dose-Quality Trade-off
  • Image Quality Metrics
  • Example Images
  • Noise Artifacts
  • Pros & Cons
CT Imaging
5 questions
Section 4: Ultrasound Imaging
12:24

This lecture includes the following key topics:

  • Ultrasound System Architecture
  • Probe Components
  • Piezoelectric Effect
  • Transverse vs. Longitudinal Waves
  • Compression and Rarefaction
  • Reflection, Transmission, and Refraction
  • Acoustic Impedance
A Note on Refraction and Sound Speed
Article
07:06

This lecture includes the following key topics:

  • Pulse Echo Imaging
  • Beamforming
  • Envelope Detection
  • Time-Depth Relationship
  • A-mode, B-mode, M-mode
  • Image Examples
11:29

This lecture includes the following key topics:

  • Speckle
  • Clutter
  • Shadowing
  • Speckle Tracking
  • SLSC
  • Doppler Imaging
  • Recent Advances
  • Pros & Cons
Sound In, Sound Out
5 questions
17 pages

This my research paper describing one of the many benefits of 3D speckle tracking. You should be able to understand most of the details within after completing this section of the course.

30 pages

This is another one of my research papers. It describes additional methods that can be used to track tissue motion and compares them against each other. This is the most comprehensive study of advanced tracking methods for the liver to date.

Section 5: Magnetic Resonance Imaging (MRI)
11:02

This lecture includes the following key topics:

  • MRI System Components
  • The Electromagnet Properties
  • Proton Response to Magnetic Field
  • Precession
  • Larmor Frequency
  • Magnetization Vectors
08:42

This lecture includes the following key topics:

  • RF Coils
  • Proton Response to RF Energy
  • Faraday Induction
  • Flip Angle Measurements
  • Gradient Coils
  • Slice Selection
More Details on the Larmor Frequency and Flipping Protons
Article
10:14

This lecture includes the following key topics:

  • Magnetization Vector Recording
  • Obtaining Image Contrast
  • Example Images
  • MRI Safety
  • Noise Artifacts
  • Pros & Cons
12 pages

Ever wondered what the brains of patients with neurological diseases looked like? Satisfy your curiosity with this lecture.

Flip, flip, spin
6 questions
Section 6: Recap and Outlook
1 page

By now, you have all of the information you need to determine which imaging method made these brain images. Look for key features that are unique to each imaging method.

Solutions to "Guess That Image"
Article
10:00

This lecture includes the following key topics:

  • Light and Sound Relationship
  • Contrast Mechanism
  • Common Applications
15:09

This lecture includes the following key topics:

  • Advantages and Disadvantages of Small Lasers
  • SLSC Applied to Photoacoustic Imaging
  • Interventional Imaging Potential
09:23

This lecture includes the following key topics:

  • Reasons to Include Robots
  • Eye Protection
  • Pros & Cons
Identify the Imaging Method
5 questions
Section 7: Evaluation
Short and Sweet Course Feedback
4 questions

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Instructor Biography

Muyinatu Bell, PhD, Biomedical Engineer, Researcher, and Course Instructor

Dr. Bell is an accomplished researcher and engineer with degrees and training from world class institutions. She earned her Ph.D. degree in Biomedical Engineering from Duke University (Durham, NC, USA) and her B.S. Degree in Mechanical Engineering from the Massachusetts Institute of Technology (Cambridge, MA, USA), where she minored in Biomedical Engineering. In addition, Dr. Bell conducted research abroad as an Academic Visitor at the Institute of Cancer Research and Royal Marsden Hospital (Sutton, Surrey, UK).

Dr. Bell has published over 39 scientific journal articles and conference papers and has 8 years of experience presenting her work at national and international meetings, sharing her findings with novice and experienced colleagues alike. These presentations have led to invited speaking engagements at multiple universities across the globe, as well as guest lectures and teaching positions to develop new courses at her current institution, Johns Hopkins University (Baltimore, MD, USA), where she currently resides as a research fellow. She is the recipient of numerous awards, grants, and fellowships that fund and support her work.

Dr. Bell has a passion for disseminating knowledge to her students and enjoys seeing the proverbial light bulb illuminate in the minds of others. She takes pleasure in being the source of these "Aha!" moments. Her areas of interest, research, and expertise include medical imaging, ultrasound, photoacoustics, medical device design, medical robotics, technology development, and novel image processing methods, for which she has multiple patents pending.

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