Radiation Safety Training That Changes Behaviour

How to turn radiation protection from a set of rules into team habits that measurably lower staff dose in interventional radiology and cardiac catheterisation labs.

Make the risk visible

The International Commission on Radiological Protection recommends an occupational dose limit for the lens of the eye of 20 mSv per year, averaged over five years, with no single year above 50 mSv. The limit was lowered because evidence showed radiation-induced cataracts at lower doses than previously thought. For anyone working beside a C-arm, that puts head-level protection at the centre of daily practice.^[1]

The problem is that scatter radiation is invisible. Staff cannot see the dose they are standing in, so it is hard to connect a habit, such as where they stand or where the screen sits, to its consequence. RadSafe VR makes that link visible. Modelled on the Siemens Healthineers ARTIS icono interventional system, with radiation output calibrated with medical physicists, it shows scatter and live staff dose as learners change tube position, frame rate, dose level, patient body mass, staff position and shielding.

What the RadSafe VR trials show

Three crossover trials have measured real occupational dose with dosimeters before and after RadSafe VR training. In each, every group received both VR and traditional training in turn.

• 100 scrub nurses, cardiac catheterisation labs. Over 18 months, with dosimeters at the eye, chest and pelvis, RadSafe VR training produced significantly greater dose reductions than traditional training at all three sites, and the benefit persisted after training.^[2]
• 39 cath lab and orthopaedic theatre staff. Over two years, RadSafe VR reduced radiation exposure significantly more than didactic training, with larger effects per hour of training. Satisfaction, engagement and confidence were also significantly higher after VR.^[3]
• 34 interventional radiology nurses, eight hospitals. Eye dose fell by about 25% after VR training, against about 7% after traditional training. When the second group switched to VR, their eye dose fell by about 23%.^[4]

Learners value it too. At University College Dublin, 80% of radiography and medical students who responded enjoyed learning radiation safety in a 3D VR interventional suite, and 73% said it improved their confidence across the learning outcomes.^[5]

Immediate feedback builds habits

Behaviour changes when feedback is instant and specific. In a randomised trial of 505 cardiac catheterisation procedures, a radiation monitor that gave operators real-time audible feedback significantly reduced their exposure compared with procedures without it.^[6]

Simulation applies the same principle with no exposure at all. Learners make a choice, see the dose change, and try again, as many times as they need. The habit is built before they are back in a live room.

Coach geometry, shielding and collimation

A handful of controllable choices drive most staff exposure. Each has published evidence behind it.

• Ceiling-suspended screen. In a phantom study of coronary angiography, a ceiling screen with table-side shielding cut dose to the primary operator by 76.8% to 93.5%, depending on its position. It worked best placed close to the operator.^[7]
• Protective eyewear and head position. Radiation safety glasses reduced eye dose by a factor of about 8 to 10 when facing the source, but by only about 2 in clinical practice, because protection drops sharply when the head turns away from the irradiated area. Eyewear works best with good habits.^[8]
• Radiation-absorbing drapes. In a randomised study of transjugular liver biopsies, disposable radiation-absorbing drapes reduced operator dose by 56%.^[9]
• Collimation. Routinely collimating to the minimum required field significantly reduced radiation exposure in electrophysiology procedures.^[10]
• Frame rate. In a randomised trial of transradial coronary procedures, fluoroscopy at 7.5 frames per second instead of 15 reduced operator dose by 30%.^[11]

Train these as concrete moves in realistic tasks: move the screen, change the projection, drop the frame rate, and watch the staff dose respond.

Practise in VR, check transfer in the real room

Skills learned in a headset need to hold up in a physical room. In a randomised study of 188 first-year radiography students, those trained with VMC's VR simulation completed an exam in a real X-ray room, with actors as patients, faster and with fewer errors in moving equipment and positioning than students trained on physical equipment.^[12] Spatial skills, such as where to stand and how to set up equipment, are exactly the ones that drive occupational dose.

A four-week rollout that embeds change

Week 1: baseline and briefing. Fit staff with eye, collar and ring dosimeters where required. Record collimation, pulse and frame rates, fluoroscopy time and shield placement on consecutive cases. Brief the team on the lens dose limit and how small changes in geometry alter head and hand dose.

Week 2: simulation with live dose. Run two scenario-based sessions in RadSafe VR. Ask each learner to bring staff dose down by changing tube position, screen placement, projection and frame rate. Export each session report and debrief on which changes made the biggest difference. Results are saved to each learner's own portfolio, which the radiation safety officer or educator can also view.

Week 3: live cases with visible feedback. Where real-time dose displays are available, show staff dose during a training list. Make short pauses to fix screens or geometry a normal part of the list when dose rates spike.

Week 4: compare and commit. Compare behaviours and personal dose with the Week 1 baseline. Each person sets one specific action for the next month, then repeats a RadSafe VR scenario and exports the report, so progress is recorded in their portfolio.

Checklist for every case

• Detector as close to the patient as possible
• X-ray tube as far from the patient as practical
• Ceiling screen between the operator's head and the patient
• Table skirts down, lateral shields in place
• Collimated to the anatomy of interest
• Lowest acceptable pulse and frame rates
• Protective eyewear on, head turned towards the screen
• Dosimeters worn and working
• One learning point noted for the team debrief

Frequently asked questions

Does VR radiation safety training reduce staff dose?

Yes. Three crossover trials in cardiac catheterisation labs, orthopaedic theatres and interventional radiology found staff received significantly less radiation after RadSafe VR training than after traditional training. One reported an eye dose reduction of about 25%.

What is the eye lens dose limit for staff?

The ICRP recommends 20 mSv per year, averaged over five years, with no single year above 50 mSv. Check your national regulations, which set the legal limit where you work.

Which changes reduce operator dose the most?

Published studies show large reductions from a correctly positioned ceiling-suspended screen, radiation-absorbing drapes, tighter collimation and lower frame rates. Protective eyewear helps most when the head faces the source.

Who should take radiation safety training in VR?

Anyone who works around fluoroscopy: radiographers, interventional radiologists, cardiologists, surgeons, scrub and circulating nurses, anaesthetic staff and students before their first placement.

References

1. ICRP (2012). ICRP Statement on Tissue Reactions and Early and Late Effects of Radiation in Normal Tissues and Organs. ICRP Publication 118. Annals of the ICRP, 41(1/2), 1 to 322.
2. Romanenko, T., Kovalenko, M., Kovalenko, O., Bondarenkp, O., and Melnyk, I. (2026). Virtual reality vs traditional training in radiation safety for scrub nurses: a crossover trial in cardiac catheterisation labs. Journal of Perioperative Care, 1(1), 1 to 8.
3. Mwangi, W., and Tanaka, Y. (2025). Comparative effectiveness of immersive virtual reality and traditional didactic training on radiation safety in medical professionals: A crossover study. Journal of Medical Radiation Sciences, 72(S2), S52 to S60.
4. Khamis, K. K., Bello, A. S., and Abdullahi, M. L. (2025). Assessing the impact of virtual reality training on radiation dose reduction among interventional radiology nurses: A multicenter crossover study. Journal of Radiology Nursing, 44(3), 300 to 305.
5. Rainford, L., Tcacenco, A., Potocnik, J., Brophy, C., Lunney, A., Kearney, D., and O'Connor, M. (2023). Student perceptions of the use of three-dimensional (3-D) virtual reality (VR) simulation in the delivery of radiation protection training for radiography and medical students. Radiography, 29(4), 777 to 785.
6. Christopoulos, G., Papayannis, A., Alomar, M., et al. (2014). Effect of a real-time radiation monitoring device on operator radiation exposure during cardiac catheterization. Circulation: Cardiovascular Interventions, 7(6), 744 to 750.
7. Jia, Q., Chen, Z., Jiang, X., et al. (2017). Operator radiation and the efficacy of ceiling-suspended lead screen shielding during coronary angiography: An anthropomorphic phantom study using real-time dosimeters. Scientific Reports, 7, 42077.
8. van Rooijen, B., de Haan, M., Das, M., et al. (2014). Efficacy of radiation safety glasses in interventional radiology. CardioVascular and Interventional Radiology, 37(5), 1149 to 1155.
9. Kohlbrenner, R., Lehrman, E., Taylor, A., et al. (2018). Operator dose reduction during transjugular liver biopsy using a radiation-attenuating drape: A prospective, randomized study. Journal of Vascular and Interventional Radiology, 29(9), 1248 to 1253.
10. Walters, T., Kistler, P., Morton, J., et al. (2012). Impact of collimation on radiation exposure during interventional electrophysiology. Europace, 14(11), 1670 to 1673.
11. Abdelaal, E., Plourde, G., MacHaalany, J., et al. (2014). Effectiveness of low rate fluoroscopy at reducing operator and patient radiation dose during transradial coronary angiography and interventions. JACC: Cardiovascular Interventions, 7(5), 567 to 574.
12. Rowe, D., Garcia, A., and Rossi, B. (2023). Comparison of virtual reality and physical simulation training in first-year radiography students in South America. Journal of Medical Radiation Sciences, 70(2), 120 to 126.