Thyroid Collars and Radiation Gloves: The PPE Departments Forget

Ask any interventional department what their radiation protection kit looks like and the apron comes up first, every time. It’s the biggest, most visible piece of equipment in the room, and it’s the one staff are trained on from day one. Thyroid collars and radiation attenuating gloves tend to get treated as an afterthought by comparison, optional extras rather than core PPE, even though the tissues they protect, the thyroid gland and the hands, are both handling meaningfully more radiation dose than most people assume.

This guide covers why both matter, what the dose limits actually say, and how to choose the right ones for your department.

The thyroid: a small gland doing a lot of absorbing

The thyroid sits directly in the neck, close to the beam path in most interventional and fluoroscopy guided work, and it’s one of the more radiosensitive organs in the body. The ICRP sets a specific annual occupational dose limit for the thyroid gland at 300 mSv, distinct from the 20 mSv whole-body limit, reflecting both its sensitivity and its exposed position during procedures. A structured review of occupational radiation exposure found a higher prevalence of thyroid nodules among radiology, nuclear medicine and interventional cardiology staff compared with the general population, along with measurable shifts in thyroid hormone levels among more heavily exposed workers.

The protective case is straightforward and well evidenced. A narrative review of shielding effectiveness across fluoroscopy guided procedures found that thyroid collars reduce neck dose by 60 to 70%, a substantial reduction for what is a genuinely lightweight piece of kit compared with the apron. Standard thyroid shields provide 0.5mm lead equivalent protection, tested to the same EN 61331-1 attenuation standard as the rest of a department’s radiation protective clothing.

Hands: closer to the beam than people think

The hands present a different picture entirely. The ICRP extremity dose limit sits at 500 mSv a year, considerably higher than the whole-body limit, precisely because hands are expected to work close to the primary beam in a way the torso doesn’t. But that higher limit doesn’t mean hand dose is a non-issue. In direct-manipulation procedures, an operator’s hands can receive substantially more radiation than the torso, because they’re often working right at the edge of, or occasionally within, the collimated field. One frequently cited example involves a radiographer manually holding a trauma patient’s head during cervical spine imaging: doing so just four times a week, unprotected, can expose the hands to over 1,000 mSv a year, twice the extremity dose limit.

That’s an extreme case, but it illustrates the underlying point. Studies looking specifically at radiation attenuating gloves during fluoroscopy guided interventions have found dose reductions ranging from around 15% up to 60%, depending on glove design, procedure type, and how close the hands work to the beam. It’s not the dramatic 90%+ reduction an apron provides against scatter, gloves are working in a much harder environment, closer to the source, with far less material to work with before dexterity is compromised, but a genuine reduction in cumulative hand dose over a career is still a genuine reduction.

Why compliance is lower for these two than for the apron

There’s a consistent finding across studies of PPE use in interventional settings: compliance with aprons and thyroid collars tends to be high, while glove use in particular is much more inconsistent. The reasons are practical rather than clinical. Gloves reduce tactile feedback, which matters enormously during fine catheter or wire manipulation, and older or poorly fitted designs can make precise work genuinely harder. This is exactly why glove specification matters more than most departments assume: a glove nobody’s willing to wear during a real procedure protects nobody, regardless of its attenuation rating.

What to look for in a thyroid collar

• 0.5mm lead equivalence, tested to EN 61331-1, as the standard baseline for interventional and diagnostic use.
• Full wraparound coverage rather than front-only protection, since scatter reaches the neck from multiple angles during a typical procedure.
• Closure type. Hook-and-loop is common and adjustable but can harbour bacteria over repeated use; magnetic closures are increasingly popular for infection control reasons and tend to be faster to put on and remove between cases.
• Comfort over a full list. A collar that digs in or restricts neck movement gets loosened or removed by lunchtime. This matters more for the staff wearing it through back-to-back procedures than the spec sheet suggests.

What to look for in radiation attenuating gloves

• A genuine attenuation rating, not just a marketing claim. Real radiation attenuating gloves, whether lead-based or lead-free bismuth composite, will state a tested attenuation percentage rather than simply calling themselves “protective”.
• Sterile options for OR and cath lab use. Sterile radiation attenuating gloves exist specifically for use inside the sterile field, distinct from non-sterile positioning gloves used outside it. Using the wrong category in the wrong setting is a common and avoidable mistake.
• Dexterity first. If a glove noticeably degrades fine motor control, staff will find a way to work around it. The best-attenuating glove on the market is worthless if it’s not actually worn during the procedure it’s meant for.
• Latex-free options, given how common latex sensitivity has become across clinical staff generally.

Building a complete protection routine

None of this replaces the apron, and none of it works in isolation. A collar without an apron leaves the torso exposed; an apron without a collar leaves one of the body’s more radiosensitive organs unprotected in a high-scatter zone; gloves matter specifically for staff whose hands routinely work close to the beam, less so for those working primarily from a control area. The right combination depends on role, procedure type, and how close to the source a given team member typically works, which is exactly the kind of thing worth reviewing department by department rather than applying a single blanket policy.

Our thyroid collar range and radiation attenuating glove range cover both wraparound and front-panel collar styles, and sterile and non-sterile glove options, alongside our full lead apron range for departments reviewing the whole PPE picture at once. Get in touch if you’d like help matching kit to your team’s actual procedure mix.

Frequently asked questions

What is the dose limit for the thyroid gland?

The ICRP sets a specific annual occupational dose limit of 300 mSv for the thyroid gland, distinct from the 20 mSv whole-body limit, reflecting the gland’s radiosensitivity and its typically exposed position during fluoroscopy guided procedures.

How much do thyroid collars actually reduce radiation dose?

A structured review of shielding effectiveness across fluoroscopy guided procedures found thyroid collars reduce neck dose by 60 to 70%. Standard collars provide 0.5mm lead equivalent protection.

Do radiation attenuating gloves actually work?

Yes, though the reduction is more modest than an apron provides against scatter. Studies of radiation attenuating gloves during fluoroscopy guided procedures have found hand dose reductions ranging from roughly 15% to 60%, depending on glove design and how close the hands work to the primary beam.

What is the radiation dose limit for hands?

The ICRP extremity dose limit is 500 mSv a year, considerably higher than the 20 mSv whole-body limit, but this reflects the higher typical exposure hands receive during direct manipulation work, not a lower level of concern.

Why is glove compliance often lower than apron compliance?

Studies of PPE use in interventional settings consistently find lower compliance with gloves than with aprons or thyroid collars, largely because gloves can reduce tactile feedback during fine catheter or wire manipulation. Choosing a well-fitted, dexterity-focused glove matters as much as its attenuation rating.