Dental Clinic with X-ray or CBCT: Complete Guide to CNCAN Registration

Dental Clinic with X-ray or CBCT: Complete Guide to CNCAN Registration

Installing radiological equipment in a dental clinic involves much more than selecting the system and scheduling its installation. The room, wall structure, equipment position, activities in adjacent areas, personnel, documentation, dosimetric monitoring, and technical checks must be assessed together.

A poor decision at the beginning of the project may lead to additional construction work, relocation of the equipment, modification of the shielding, or delays in starting clinical activity. Radiation protection should therefore be included from the design stage rather than added after the premises have been completed.

CNCAN registration or authorization?

The general expression “CNCAN authorization” is frequently used in practice. Technically, current Romanian regulations state that dental radiology practices using intraoral, extraoral, and CBCT installations are generally subject to CNCAN registration.

Registration must be requested before the practice begins and covers the applicable activities related to siting, construction, possession, and use of the radiological installation. The certificate allows only the activities and equipment specified in the document and under the conditions established by CNCAN.

This distinction is important because a dental CBCT system should not be confused with a conventional medical computed tomography scanner. The applicable regulatory pathway must be determined according to the exact equipment and practice.

1. Define the type of equipment to be installed

The first step is to establish the exact activity:

• intraoral dental X-ray system;
• panoramic system;
• cephalometric system;
• combined panoramic and cephalometric system;
• CBCT;
• several systems at the same workplace.

The equipment model, maximum tube voltage, beam geometry, field of view, estimated workload, and equipment position influence the shielding calculation and the organization of the room.

Construction work should not be finalized before the equipment and its configuration have been established.

2. Assess the room before construction

The room must provide sufficient space for equipment installation, clinical use, servicing, and patient access. Its size and configuration must take account of the manufacturer’s requirements and, where necessary, a radiation safety assessment performed in consultation with a radiation protection expert.

The assessment should consider:

• wall materials and thicknesses;
• ceiling and floor construction;
• rooms above and below;
• adjacent clinical and public areas;
• places where staff or members of the public remain;
• doors and windows;
• equipment position and beam direction;
• estimated number of examinations;
• types of procedures performed.

A room that appears suitable from an architectural perspective may require changes after the beam direction and occupancy of neighboring areas have been assessed.

3. Shielding does not automatically mean lead on every wall

Structural shielding must be determined through a radiation protection calculation. This calculation considers radiation energy, workload, beam orientation, use and occupancy factors, existing construction materials, and applicable dose constraints.

Depending on the result, the solution may include:

• walls with sufficient thickness;
• attenuation materials;
• lead sheets or boards;
• barium-based plaster;
• shielded doors or windows;
• local protection in specific directions.

Not every dental clinic requires the same solution. Installing lead without a calculation may create unnecessary costs, while insufficient shielding may require the work to be repeated.

The registration documentation must include room plans, adjacent activities, equipment position, beam direction, area classification, and the structural shielding calculation.

4. Use authorized suppliers and installation companies

The equipment must be obtained through a supplier legally permitted to provide the relevant installation. Installation, assembly, testing, maintenance, repair, and decommissioning must be performed by an undertaking authorized by CNCAN for the applicable handling activities.

The clinic should retain:

• equipment identification documents;
• technical documentation and manuals;
• applicable declarations and certificates;
• installation records;
• commissioning report;
• acceptance test results;
• operator training records;
• technical service file.

Training provided by the installing company must be documented for each operator.

5. What must the CNCAN registration file contain?

The exact content depends on the clinic configuration and equipment. The technical registration file includes, among other elements:

• applicant and workplace information;
• complete identification of the radiological installation;
• description of the building and room;
• scaled floor and room plans;
• activities performed in adjacent areas;
• equipment position and beam direction;
• structural shielding calculation;
• acceptance test results;
• measurement-based shielding verification;
• list of occupationally exposed workers and their permits;
• radiation protection programme;
• quality assurance programme;
• administrative documents and proof of applicable fee payment.

Incomplete documentation may delay the assessment and issuance of the certificate.

6. Appoint a Radiation Protection Officer

The medical facility must formally appoint at least one Radiation Protection Officer, or RPO, for each controlled area. The RPO must have the appropriate training and practice permit and must report directly to the facility’s legal representative.

The RPO’s activities include:

• supervising the radiation protection programme;
• overseeing personal dosimetry;
• maintaining equipment records;
• checking warning and safety systems;
• organizing periodic training;
• monitoring occupational health requirements;
• maintaining records;
• liaising with the radiation protection expert;
• participating in equipment installation, maintenance, and testing.

The RPO must be actively involved in the clinic’s operations, not merely listed in the documentation.

7. Ensure that personnel are properly trained and authorized

The facility must use workers who hold the practice permits appropriate to their position and assigned tasks. Responsibilities must be defined, documented, and communicated to staff.

Before the activity starts, verify:

• professional qualifications;
• applicable CNCAN practice permits;
• equipment operation training;
• radiation protection training;
• written responsibilities;
• working procedures;
• procedures for unusual events;
• occupational health surveillance.

For CBCT, training should also cover examination justification, field-of-view selection, and protocol optimization.

8. Complete acceptance testing and shielding verification

After installation, acceptance testing must demonstrate that the equipment operates within the required parameters.

Shielding effectiveness must be verified through measurements performed under representative conditions. The results form part of the CNCAN registration documentation.

Clinical use should not begin solely because the equipment can produce images. The applicable technical, documentary, and registration steps must first be completed.

9. Is personal dosimetric monitoring required?

The facility must ensure individual monitoring for all workers classified as occupationally exposed. Monitoring must be performed by an individual dosimetry service designated by CNCAN, and the monitoring system must be established in consultation with a radiation protection expert.

This does not mean that every clinic employee automatically requires a dosimeter. Monitoring is determined according to actual duties, worker classification, and the radiation risk assessment.

Personnel assessed for monitoring may include:

• dentists operating the equipment;
• assistants involved in examinations;
• personnel frequently entering the controlled area;
• other persons who may be occupationally exposed.

Dosimeters must be worn, stored, and returned according to the established procedure.

10. Perform periodic workplace monitoring

Radiological surveillance of fixed medical radiological installations must be carried out at intervals of 12 months and after major repairs, the introduction of new techniques, or other changes that may affect radiation protection conditions.

The report should include:

• equipment parameters used during measurement;
• room plan and measurement points;
• measured dose-rate values;
• measuring instrument and calibration information;
• measurement date;
• identity of the person performing the measurement;
• corrective actions, where applicable.

Area monitoring does not replace personal monitoring. They assess different aspects of the radiation protection system.

11. QA/QC is not the same as routine servicing

The clinic must implement a quality assurance programme and quality control procedures for the radiological installation and medical exposures. These include equipment performance monitoring, image receptor control, written protocols, result records, and patient dose assessment.

Daily, weekly, and monthly checks recommended by the manufacturer must be performed. Following repairs and during periodic checks at intervals not exceeding one year, the authorized handling company must issue documentation confirming that the equipment remains within its nominal technical parameters.

Technical servicing, quality control, and workplace radiation monitoring have different purposes and must be documented separately.

12. Is a red warning light mandatory for every dental X-ray unit?

The same warning light, interlock system, or room configuration should not automatically be assumed for every dental installation.

Current regulations allow dental radiological systems to be installed in the room where dental procedures are performed. Under this arrangement:

• the operator may initiate exposure after moving outside the useful beam and to the maximum distance allowed by the exposure cable;
• if exposure is controlled from outside, the patient must be monitored audiovisually;
• radiation warning systems or interlocks are not automatically required;
• where several systems are installed in the same room, simultaneous operation must be prevented through a technical solution.

The final solution depends on the equipment, room, operator position, shielding calculation, and radiation safety assessment.

13. Important CBCT requirements

CBCT should be used only when the examination is justified, and the protocol must be adapted to the clinical need.

The regulations address:

• adjustable exposure parameters and optimized protocols;
• selection of the smallest clinically necessary exposed volume;
• calibration of digital systems;
• selection of the largest voxel size compatible with diagnostic accuracy;
• pediatric imaging mode;
• careful use of thyroid protection without creating image artifacts.

CBCT should not be used routinely where the necessary clinical information can be obtained through a lower-exposure procedure.

14. Maintain compliance after registration

Compliance does not end when the CNCAN certificate is received. The clinic must maintain and update:

• equipment records and technical files;
• staff permits and training records;
• personal monitoring results;
• occupational health records;
• workplace monitoring reports;
• QA/QC results;
• service and repair records;
• protective equipment records;
• examination protocols;
• patient dose records;
• unusual event and corrective action records.

Replacing the system, adding new equipment, moving an installation, modifying the room, or changing responsible personnel may require modification of the certificate before the change becomes effective.

Common mistakes

Common problems include:

• purchasing equipment before assessing the room;
• completing construction without a shielding calculation;
• assuming every wall must contain lead;
• treating installation as completion of the CNCAN process;
• missing acceptance tests;
• failure to verify shielding effectiveness;
• appointing an RPO only formally;
• incomplete personnel permits or training;
• starting dosimetry after clinical work begins;
• confusing QA/QC with routine servicing;
• failing to document later changes.
• How can Q RAD Laboratory help?

Q RAD Laboratory can coordinate the entire project, from the initial plan to the clinic’s ongoing operation.

Through our own resources and authorized strategic partners, we can coordinate:

• initial project assessment;
• room selection and evaluation;
• workflow design;
• shielding calculations;
• radiation protection construction solutions;
• equipment selection and supply;
• installation and commissioning;
• CNCAN documentation;
• RPO support;
• personal dosimetric monitoring;
• workplace monitoring;
• technical tests and checks;
• radiation protection equipment;
• staff training;
• document maintenance;
• inspection preparation.

The client works with a single point of contact, while Q RAD coordinates the specialists and authorized companies required for each stage.

Conclusion

Opening a dental clinic with an intraoral X-ray, panoramic, or CBCT system must be planned as an integrated project. The room, equipment, shielding, personnel, documentation, and procedures are interconnected.

The most efficient approach is to involve specialists before purchasing the equipment and before completing construction work. This helps prevent expensive modifications, delays, and nonconformities.

Q RAD Laboratory can coordinate the process from design and construction to equipment, CNCAN registration, dosimetric monitoring, and continuous operational support.

This article provides general information. Exact requirements depend on the installation, room configuration, activity performed, and conditions imposed by the competent authorities.