About this Program

In the past several years, significant advances in Computed Tomography (CT) technology have occurred with the development of spiral/helical scanning and multi-slice/multi-detector row scanners. These developments have driven an expansion in the clinical applications of CT and an increased number of CT scanners. Opportunities for CT technologists have grown as a result. Evidence of competency in CT can be demonstrated by completing the requirements for certification in Computed Tomography offered by the American Registry of Radiologic Technologists (ARRT). This has become a required credential for employment in many facilities.

This on-demand review series offers a comprehensive foundation in CT imaging knowledge, enhancing your understanding of the appropriate use and interpretation of this technology. Accessible at your convenience, this series allows you to choose the topics you need to review and revisit them whenever you wish. This serves at preparation for the ARRT CT certification examination

Completing all four parts provides 16 continuing education credits. A certificate of attendance, documenting 4-credit hours will be provided for each individual upon completion.

Agenda:  Part 2 - Radiation Physics and Instrumentation

CT System Principles, Operation and Components

  • Tube characteristics
  • Generators
  • Collimation and filtration
  • Detectors and arrays
  • Conventional vs. Helical scanning
  • Interpolation
  • Cardiac gating/calcium scoring
  • Informatics
  • Quality Control
  • Operational and components
  • Reconstruction algorithm

Image processing and display

  • Image quality
  • Image display
  • Pixel, Voxel, Matrix, FOV
  • CT numbers/attenuation coefficient
  • Windowing and leveling
  • X, Y and Z coordinates
  • Hounsfield Units
  • Spatial and contrast resolution
  • Post processing 3D

Artifacts

How it Works:

  • The On Demand CE activity that you purchased will be located in your “My Account” section once you log into the MTMI Website.
  • You have three attempts to pass each quiz.
  • You must earn a score of 75% or higher.
  • Credit is recorded the day you submit and pass the quiz and is determined using Central time.
  • You have 30 days to complete and pass the quiz.
  • Once passed, access your MTMI “My Account” to print your “Certificate of Completion.”
  • This video expires 1 year after purchase date.

Educational Objectives

At the completion of this program, participants will:

  • Understand the patient handling, assessment and monitoring skills required for CT 
    examinations. 
  • Safely conduct and monitor the administration of contrast media required for some CT 
    imaging techniques. 
  • Appreciate radiation safety and dose considerations needed to conduct CT 
    examinations safely. 
  • Describe the main components of a CT scanner and their function in the imaging 
    process. 
  • Understand the operation of a CT scanner and the control of parameters that affect 
    image quality and artifacts. 

Program Faculty

Meet your presenter(s)

Amber L. Lenhard MBA

Amber L. Lenhard MBA

MBA, B. A. Humanities; BAS; RT(R)(CT)

Mrs. Amber Lenhard is a former college instructor in Medical Imaging, and prior US Air Force Radiologic technologist. Over the past 12 years, she has used her military training to help instruct and mentor many students within Medical Imaging. Amber has a passion for the field of Medical Imaging and enjoys still being able to work, hands on, in both X-ray and CT wherever she goes.  Her husband of 20 years, Keith, is currently on active duty, as a Naval OR Nurse, and together they have two children, Donovan James and Abigail Joy. A fun fact about Mrs. Amber is that she had the opportunity to fulfill a career dream of working with professional athletes. From 2016 - 2021 she was one of the X-ray techs, who alongside the athletic trainers, worked for both the Washington Redskins NFL, as well as the Nationals Baseball teams, and has a 2019 World Series ring.

Credits

Accredited training programs

ASRT Pending Credit Information

ASRT Pending

Category A/A+ CE credit is pending approval by the ASRT. An application for 4 hours of credit for radiologic technologists recognized by the ARRT and various licensure states has been filed.