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Shielding in Radiology
X-Ray Producing Equipment, Magnetic Resonance Imaging, and Nuclear Medicine, PET, & Molecular Imaging
Location & Dates
- Webinar | Session 1 - X-Ray Shielding Criteria | Jan 25 2022 | 6-7:30pm Central Time
- Webinar | Session 2 - Mammography, CT & MRI | Jan 26 2022 | 6-7:30pm Central Time
- Webinar | Session 3 - NM, PET/CT, SPECT/CT, & Radiopharmaceutical Therapy| Jan 27 2022 | 6-7:30pm Central Time
- Webinar | Session 1 - X-Ray Shielding Criteria | Jan 25 2022 | 6-7:30pm Central Time
- Webinar | Session 2 - Mammography, CT & MRI | Jan 26 2022 | 6-7:30pm Central Time
- Webinar | Session 3 - NM, PET/CT, SPECT/CT, & Radiopharmaceutical Therapy| Jan 27 2022 | 6-7:30pm Central Time
All webinars are held in Central Time, see Time Zone Map Below
Overview
About this Webinar
Medical uses of radiation have grown very rapidly over the past two decades, and remains as the largest source of manmade ionizing radiation exposure to the U.S. population. Additionally, non-ionizing radiation from Magnetic Resonance Imaging also presents unique hazards. Engineering controls from properly designed and installed safety barriers (shielding) are among the most effective strategies for protecting individuals from the hazards unique to Radiology. Therefore, understanding the design and evaluation of shields for radioactive sources, x-ray producing equipment, and MRI systems are essential for maintaining a safe imaging environment. This 3-part webinar will provide you with an in depth look at shielding common Radiology modalities including radiography, mammography, fluoroscopy, CT, MRI, Nuclear Medicine, SPECT/CT, PET/CT, and Radiopharmaceutical Therapy.
Educational Objectives
At the completion of this webinar, participants will be able to:
Session 1 - X-ray Shielding Criteria
- Identify diagnostic x‑ray shielding criteria, such as, permitted dose, occupancy factor and sources of x‑ray exposure.
- Distinguish the difference between primary and secondary x‑ray radiation.
- Describe the models for shielded dose pertaining to primary and secondary radiation.
- Review the parameters for unshielded dose per patient in primary and secondary radiation environments.
Session 2 – Mammography, CT and MRI
- Identify the applications and limitations of the models for shielding representative radiography and fluoroscopy rooms described in NCRP-147 Chapter 5.
- Understand the issues in determining mammography shielding and perform sample calculations.
- Understand the issues in determining computed tomography shielding and perform sample calculations.
- Understand the basic considerations for shielding a clinical MRI suite.
Session 3 - NM, PET/CT, SPECT/CT, and Radiopharmaceutical Therapy
- Identify the types of shielding required for Nuclear Medicine and the need to satisfy both annual and per hour dose limits.
- Describe the general shielding requirements in Nuclear Medicine and source terms for radionuclides.
- Review shielding requirements for Positron Emission Tomography, PET/CT and SPECT/CT and the effects of half‑life in shielding calculations.
- Outline the method of combining both keV and CT shielding for Positron Emission Tomography and Computed Tomography.
- Understand the basic considerations for shielding and designing a clinical Radiopharmaceutical Therapy suite.
Schedule
Session 1 – X-ray Producing Equipment in the Diagnostic Energy Range
- Permitted dose
- Occupancy factor
- Sources of x-ray exposure
- Models for shielded dose
- Primary Radiation
- workload
- use factor
- primary transmission
- pre-shielding
- examples
- Secondary Radiation
- scatter
- leakage
- secondary transmission
- examples
- Unshielded dose per patient
- Primary
- Secondary
- Model with per patient workload
- examples
Session 2 – Mammography, CT and MRI
- Model for representative rooms (NT/Pd2)
- Radiographic room
- Rad/Fluoro room
- Fits of NT/Pd2 data
- examples
- Shielding models for film/screen and FFDM units
- Shielding data for Tomosynthesis units
- examples
- Shielding Models
- Mammography
- CT
- CTDI-based
- DLP-based
- Transmission Data
- examples
- Static Magnetic Field Shielding
- Radiofrequency Shielding
- Acoustic/Vibrational Shielding
- Extremely Low Frequency (ELF) electric field shielding
- MRI
Session 3 - NM, PET/CT, SPECT/CT, and Radiopharmaceutical Therapy
- General Requirements
- Dose in one hour
- Annualized dose
- Shielding other nuclear medicine imaging devices
- Activity to dose rate
- Accumulated dose
- Method for combining both radionuclide and CT shielding
- Examples
- Effect of half-life in shielding calculations
- Transmission data
- Method of combining both 511 keV and CT shielding
- F-18 FDG
- Source terms for radionuclides
- Review questions
- SPECT/CT
- PET/CT
- uptake room
- scanner
- Special Considerations
- CT “shine”
- Storage for RAM waste
- Storage for Phantoms and Sources
- In-patient suites
- Outpatient suites
- Relevant considerations
- Radiopharmaceutical Therapy
Audience
This webinar is for medical physicists wanting to expand their knowledge on diagnostic and nuclear medicine radiation shielding. It is also appropriate for medical physics students, residents, fellows, technologists, and biomedical engineers.
Faculty
Name
Max Amurao, PhD, MBA, DABR(D,N), MRSE, CMLSO
Dr. Amurao is an actively practicing safety professional and medical physicist. He is certified by the American Board of Radiology in Diagnostic Medical Physics and Nuclear Medical Physics, by the Board of Laser Safety, and by the American Board of MR Safety. He currently serves as the Director of Radiation Safety for Washington University in Saint Louis, and as an Assistant Professor in the Mallinckrodt Institute of Radiology.
Credits
CAMPEP
This program provides 4.5 total for all three sessions hours of continuing education for medical physicists. The program has been approved by CAMPEP for Medical Physics Continuing Education Credit (MPCEC) for qualified medical physicists.
This program provides 1.0 hours of Category A continuing education credit per session for radiologic technologists approved by ASRT and recognized by the ARRT and various licensure states. Category A credit is also recognized by CAMRT’s Continuing Education Credit Approval Program for CE credit in Canada. You must attend the entire program to receive your certificate of completion.
Time Zone
