| Course | APS-4000 Occupational Safety and Health |
|---|---|
| Module | Module 5 |
| Paper type | Research exercise: environmental control |
| Length | About 444 words, 4 pages |
| Format | APA 7 student paper |
| School | Thomas Edison State University |
| Program | B.S. in Medical Imaging |
| Updated | October 2026 |
Free sample paper for APS 4000 Module 5
Time, Distance, Shielding: Bringing Down Staff Radiation Doses in an Interventional Suite
Student Name
B.S. in Medical Imaging, Thomas Edison State University
APS-4000: Occupational Safety and Health
Mentor Name
Month Day, Year
Time, Distance, Shielding: Bringing Down Staff Radiation Doses in an Interventional Suite
The Hazard
Scatter radiation from patients during fluoroscopy-guided procedures is the main occupational radiation hazard in imaging. After the hospital opened an interventional suite for vascular and pain procedures, two technologists who work there most often saw their quarterly whole-body dosimeter readings rise from near background to about 1.1 millisieverts per quarter. That is well below legal limits but a clear change worth investigating.
Limits and Monitoring
The federal occupational dose limit for adults is 0.05 sievert, or 5 rem, total effective dose equivalent per year, with separate limits for the lens of the eye, skin and extremities (10 C.F.R. § 20.1201). New Jersey, as an agreement state, enforces equivalent limits. Beyond limits, licensees must keep doses as low as reasonably achievable, a principle that requires reducing exposure whenever it can be done at reasonable cost. Asfahl and Rieske (2019) describe environmental control as measuring exposure, comparing it with limits and applying controls in order of effectiveness.
What Research Shows
Kim et al. (2008) reviewed decades of studies of occupational doses to operators performing cardiac catheterization and found wide variation in reported doses, with use of protective shielding and procedure volume among the factors influencing dose. Vano et al. (1998) examined staff in interventional laboratories without optimized protection and found lens opacities consistent with radiation exposure, showing that the eye is a sensitive target when shields and protective eyewear are not used.
Controls
| Principle | Control |
|---|---|
| Time | Use pulsed fluoroscopy at the lowest frame rate that gives adequate images; record fluoroscopy time for each case |
| Distance | Technologists stand at least two meters from the patient during acquisition runs when not needed at the table |
| Shielding, engineering | Ceiling-mounted lead acrylic shield and table skirts installed and used on every case |
| Shielding, personal | Fitted lead aprons and thyroid shields; leaded eyewear for staff near the table |
| Monitoring | Second dosimeter at the collar outside the apron to estimate eye dose; quarterly review with the radiation safety officer |
Follow-Up
The radiation safety officer will review the two technologists' readings each quarter after the controls are in place, along with those of everyone who works regularly in the suite. If readings do not fall within two quarters, the officer will observe procedures to find where staff are standing and how shields are positioned. Training on shield placement will be added to the orientation for anyone assigned to the suite.
Conclusion
The technologists' doses are legal but rising, and research shows that the eye can be harmed when protection is not optimized. Using time, distance and shielding systematically, and monitoring eye dose, should bring doses back toward background levels.
References
Asfahl, C. R., & Rieske, D. W. (2019). Industrial safety and health management (7th ed.). Pearson.
Kim, K. P., Miller, D. L., Balter, S., Kleinerman, R. A., Linet, M. S., Kwon, D., & Simon, S. L. (2008). Occupational radiation doses to operators performing cardiac catheterization procedures. Health Physics, 94(3), 211-227. https://doi.org/10.1097/01.HP.0000290614.76386.35
Standards for Protection Against Radiation, 10 C.F.R. § 20.1201 (2024). Occupational dose limits for adults.
Vano, E., Gonzalez, L., Beneytez, F., & Moreno, F. (1998). Lens injuries induced by occupational exposure in non-optimized interventional radiology laboratories. British Journal of Radiology, 71(847), 728-733. https://doi.org/10.1259/bjr.71.847.9771383
Reading the APS 4000 Module 5 assignment instructions
The fifth exercise deals with controlling hazards in the work environment, while Part 4 of the project, an outline plus a revised review of sources, comes due alongside it. For the exercise, identify a physical or chemical hazard in your workplace, explain the applicable exposure limits and how exposure is monitored, review research on the hazard and recommend controls in order of effectiveness. Asfahl and Rieske's chapters on environmental control are the base. Cite limits from official regulations and present controls clearly, for example in a table. Plan follow-up monitoring to show whether controls worked. Report the monitoring data that showed the problem. Cite limits from the regulation itself. Order controls by effectiveness.
How the APS 4000 Module 5 example is put together
The exercise starts with a measured change: two technologists' dosimeter readings rising after a new interventional suite opened. It explains the federal adult dose limit, cited to the regulation, and the principle of keeping doses as low as reasonably achievable. Kim and colleagues' review and Vano and colleagues' study of lens injuries show why the eye matters. A margin note explains why a legal dose still warrants action. A five-row table organizes controls by time, distance, engineering and personal shielding and monitoring, ending with a second dosimeter for eye dose. A follow-up section sets quarterly reviews and an observation step if readings do not fall. Eye dose gets its own monitoring.
APS 4000 Module 5 rubric: what earns full marks
Mentors grade this exercise on correct identification of the hazard and its limits, research on health effects and controls, application to the workplace, controls ordered by effectiveness and precise citation. Papers that use real monitoring data and official limits show rigor. Recognizing that legal compliance is not the end of protection shows professional judgment. Organizing controls by recognized principles shows understanding. Mentors also credit follow-up plans that check whether controls reduced exposure. Organizing controls by time, distance and shielding shows command of radiation protection. Using monitoring data to trigger action, even below legal limits, reflects the as-low-as-reasonably-achievable principle. Eye dose monitoring shows depth. Follow-up shows care.
APS 4000 Module 5 help from the desk
Students lose points by describing a hazard without exposure data, by quoting limits without sources or by relying on personal protective equipment alone. Find monitoring data or measure exposure if you can, cite the limit from the regulation, review research on effects and list controls from engineering to personal protection. A free first draft of your APS-4000 Module 5 exercise can be built on a hazard in your workplace. Say how and when you will check that exposure has fallen after the controls are in place. Treat legal limits as a ceiling, not a goal, and explain how exposure will be kept as low as practical. Review readings each quarter. Use second badges.
Write yours, or have the desk draft it
This paper is an original model document written by our desk, not a submitted student paper and not an official Thomas Edison State University document. Read it for the moves, then write your own to the instructions in your classroom. If you want one built to your exact prompt and rubric, the first custom sample is free and arrives in 24 to 48 hours.
More APS 4000 and B.S. in Medical Imaging sample papers
- APS 4000 Module 1: Research Exercise: The Safety and Health Manager's Role in a Hospital Imaging Department
- APS 4000 Module 2: Research Exercise: Which Rules Govern Safety in a New Jersey Hospital Imaging Department?
- APS 4000 Module 3: Research Exercise: Applying the Hierarchy of Controls to Patient Handling in Imaging
- APS 4000 Module 4: Research Exercise: Imaging's Part in a Hospital Mass Casualty Plan
- APS 4000 Module 6: Final Project Report: Ending Manual Patient Lifts in a Hospital Imaging Department
- APS 4000 Module 7: Project Presentation: Ergonomics and a Safe Patient Handling Program for Imaging
APS 4000 Module 5 questions, answered
Where can I find a free APS 4000 Module 5 sample paper?
The research exercise above addresses rising staff radiation doses in a hospital's interventional suite.
What is the federal occupational radiation dose limit?
For adults, 0.05 sievert, or 5 rem, total effective dose equivalent per year, with separate limits for the eye, skin and extremities.
What does ALARA mean?
Keeping radiation doses as low as reasonably achievable, below legal limits whenever reasonable.
What are time, distance and shielding?
The three basic means of reducing radiation exposure: less time near the source, more distance and barriers between.
What is Part 4 of the APS-4000 project?
A basic outline of the report and a revised literature review, due with Module 5.