Cone Beam CT (CBCT) scanners have become an increasingly common feature in modern dental practices. These systems provide detailed three-dimensional imaging used for implant planning, orthodontics, oral surgery, and endodontics. While CBCT technology offers significant clinical benefits, installing one within a dental practice requires careful planning to ensure the room meets UK radiation protection regulations, spatial requirements, and practical workflow considerations.

Designing a CBCT room normally involves coordination between the practice designer, equipment supplier, and the Radiation Protection Advisor (RPA). The RPA assesses the proposed installation and determines the shielding, controlled area boundaries, and safety measures required to protect staff, patients, and the public.

Radiation Regulations for Dental CBCT

Dental CBCT installations in the UK are governed by several key guidance documents and professional recommendations, including:

  • Guidance from DXPS / Public Health England (PHE)
  • Recommendations from a qualified Radiation Protection Advisor (RPA)

Before installing a CBCT scanner, a radiation risk assessment must be carried out. This assessment determines the required shielding levels and identifies the boundaries of the controlled radiation area.

The RPA will review the building construction, surrounding rooms, and occupancy levels to determine whether shielding is required in walls, doors, ceilings, or glazing.

Typical CBCT Room Size

A common early design question is how much space is required for a CBCT scanner. While manufacturers provide specific installation drawings, a useful guideline during the early design stage is to consider the footprint of a DDA compliant accessible toilet.

A typical DDA toilet measures approximately 2200 mm Ă— 1500 mm, and this footprint often provides sufficient space for most dental CBCT units. Using this size as a planning guide generally allows adequate room for:

  • the CBCT scanner itself
  • patient positioning within the machine
  • safe circulation space around the equipment
  • door swing clearance
  • operator access during setup

Although this dimension is commonly used as a design guideline, the final room layout must always be reviewed by the equipment manufacturer and the Radiation Protection Advisor to confirm compliance.

Shielding and Lead Protection

Radiation shielding is a critical aspect of CBCT room design. Depending on the scanner model and surrounding areas, shielding may be required in:

  • stud partition walls
  • a lead-lined door
  • viewing panels or camera and display systems
  • ceilings or floors in certain situations

Shielding is typically installed using Code III lead sheet as a minimum, or alternatively Knauf Safeboard, integrated within the wall construction. The thickness of lead required varies depending on the scanner output and the location of adjacent occupied spaces.

Rooms located next to waiting areas, reception spaces, or neighbouring properties may require more shielding than rooms surrounded by service areas or plant rooms.

The final shielding specification must always be confirmed by the Radiation Protection Advisor.

Reinstalling Existing Equipment

Some dental practices relocate scanners when moving premises or refurbishing an existing clinic. While reusing equipment can reduce capital costs, it introduces additional considerations during room design.

Older imaging systems, particularly those with cephalometric (Ceph) arms, often require greater levels of radiation shielding than newer compact CBCT units. Cephalometric imaging involves a wider radiation path and larger exposure area, which can increase shielding requirements.

When reinstalling previously installed equipment, the Radiation Protection Advisor will reassess the installation and may require additional lead protection compared with the original installation.

This means walls, doors, or partitions that were previously adequate may need upgrading to meet current safety standards.

For this reason, early consultation with the equipment supplier and RPA is essential when planning to relocate or reinstall CBCT equipment.

Electrical and Data Requirements

CBCT scanners require dedicated electrical and data connections to operate reliably within the dental practice.

Typical infrastructure requirements include:

  • dedicated 230V electrical supply from a switched fused spur in the operator position
  • network connection to imaging software, acquisition PC, and reconstruction server where applicable
  • workstation or server integration
  • sufficient data storage capacity for large imaging files

Because CBCT images generate large file sizes, reliable network infrastructure and adequate data storage are essential to ensure efficient workflow.

Ventilation and Environment

Although CBCT scanners do not generate excessive heat, the imaging room should still provide adequate ventilation and comfortable environmental conditions.

Proper ventilation supports equipment reliability and ensures that patients remain comfortable during scanning procedures.

Lighting design is also important. Soft ambient lighting helps patients feel relaxed while providing sufficient visibility for staff to operate the equipment safely and clearly see the operational laser guides used for patient positioning.

Patient Positioning and Workflow

Room layout should allow patients to enter the imaging room comfortably and position themselves safely within the scanner.

Most CBCT scanners require patients to stand or sit while the scan is taken. The operator must also have clear access to control the machine and monitor the patient during the scan.

Careful planning of the room layout ensures:

  • unobstructed access to the scanner
  • safe patient positioning
  • efficient operation during busy clinics

Many practices position the CBCT room close to surgeries or consultation rooms so that imaging can be performed quickly during treatment planning.

Integrating CBCT into Practice Design

CBCT rooms are usually positioned within the practice layout so they are easily accessible from surgeries and consultation areas. Some practices design imaging rooms that accommodate both panoramic imaging systems and CBCT scanners within the same space.

Positioning the imaging room correctly improves workflow efficiency while maintaining patient privacy and regulatory compliance.

Early planning during the practice design stage ensures that the required electrical services, shielding, and structural provisions are incorporated before construction begins.

Conclusion

Designing a CBCT room in the UK requires careful coordination between the practice designer, equipment supplier, and Radiation Protection Advisor. Proper planning ensures that the room meets radiation protection regulations while allowing efficient clinical workflow.

Using a DDA accessible toilet footprint of approximately 2200 mm Ă— 1500 mm as an initial planning guideline often provides sufficient space for most CBCT installations. However, final