Safety Norms: Medical Imaging and Radiologic Technology

1Purpose, Scope, and Safety Principles

These norms guide students, technologists, radiologists, nurses, physicists, and support staff who prepare, position, image, or manage patients in diagnostic imaging and image-guided procedures. Their purpose is to prevent patient harm, keep radiation exposure to the lowest level consistent with diagnostic quality, protect staff and visitors, and keep practice within local scope of practice and evidence-based protocols.

Three principles apply throughout. The right patient receives the right examination, with the right protocol, with consent where required. Every exposure must be justified and optimized. No one works beyond their authorization. Items marked mandatory are minimum expectations for every facility. Items marked recommended describe good practice that local leaders may adapt after a documented risk review. These norms do not replace formal training or approved local procedures.

2Roles, Competence, and Accountability

The radiologic technologist selects technique within approved protocols, verifies identity, completes pregnancy and contraindication screening, and confirms that images are adequate for interpretation. The ordering clinician and supervising radiologist are responsible for medical justification, interpretation, and contrast decisions as defined by local policy. The medical physicist or radiation safety officer is responsible for equipment performance checks, shielding assessment, and the dosimetry program. Nursing staff handle IV access and patient monitoring only where they hold documented authorization.

Competence is demonstrated, not assumed. Students work under direct supervision and may not operate equipment independently, inject contrast, or perform unfamiliar procedures until a documented competency sign-off is complete. Managers are accountable for keeping authorization records current and for suspending access when competence lapses or cannot be verified.

• Mandatory: Only personnel with documented authorization may operate imaging equipment, select exposure settings independently, or administer contrast media.
• Mandatory: Every examination must have an identified ordering clinician and a documented clinical reason for the request.
• Recommended: Maintain a current roster of authorized operators for each room and modality, available in the scheduling or electronic record system.

3Hazards and Risk Assessment

Imaging hazards fall into four groups: radiation, patient-related, equipment and environment, and information. Radiation is the principal hazard for staff and for patients receiving repeated or high-dose procedures such as fluoroscopy, interventional work, and computed tomography. Patient-related risks include misidentification, unrecognized pregnancy, contrast reactions, falls from tables and gantries, positioning injury, and deterioration after sedation. Equipment risks include high-voltage electrical hazards, moving gantries and C-arms, crushing points on patient tables, magnetic forces in MRI rooms, and cryogen exposure. Infection risks arise from contaminated surfaces, shared accessories, and contact with blood or body fluids during IV or drain handling.

Risk assessment rates each hazard by likelihood and severity for each room and procedure type, then assigns a control, an owner, and a review interval. High-risk items, such as contrast extravasation, MRI screening failure, and high dose during interventional work, require documented controls and review by the safety committee at a set interval.

• Radiation: personal dosimetry is worn where the regulator or facility requires it, and results are reviewed by the radiation safety officer.
• MRI: ferromagnetic objects are kept out of the scanner environment, and screening is completed before the patient enters the zoned access area.
• Contrast: reactions can occur without warning, so emergency medication and resuscitation equipment must be checked and available before injection.

4Preventive Controls and Safe Practice

Start every examination by confirming two independent identifiers, such as full name and record number, against the order. Confirm the examination, laterality, and contrast requirement. Pregnancy screening and contrast allergy screening must be documented before exposure. When pregnancy status is uncertain, discuss the examination with the ordering clinician and follow the local radiation protection procedure. Use protocols approved by the medical physicist and radiologist rather than personal preference. Repeat an image only when the reason is recorded.

Consent is required for procedures that need it under local policy, including contrast administration and interventional work. The technologist confirms that the patient understands the procedure, has had questions answered, and may withdraw consent. Patients who lack capacity are handled through the legal representative pathway defined by local law. Interpreters or accessible communication are arranged before the examination, not improvised at the table. Any uncertainty about consent is escalated to the supervising clinician before the procedure starts.

Positioning and transfer require a risk check. Lock tables and gantries before patients move onto them, assist unsteady patients, and use accessories only as the manufacturer instructs. Patients who are sedated or have reduced consciousness must not be left unattended, and monitoring follows the approved sedation policy. Contrast is given only by authorized staff using the written protocol, with allergy checks, inspection of the injection site, and observation afterward.

• Mandatory: Confirm two identifiers against the order before any exposure.
• Mandatory: Document pregnancy and contrast allergy screening before exposure.
• Mandatory: Never expose a patient without a documented order and clinical justification.
• Mandatory: Keep a staff member within sight of patients on tables, in MRI, or recovering from sedation.
• Recommended: Use a structured time-out before interventional procedures, stating the patient, procedure, site, and equipment readiness.
• Recommended: Adopt evidence-based protocols from recognized professional bodies locally, and review them at a set interval.

5Equipment, Environment, Privacy, and Protective Safeguards

Shielding, lead aprons, thyroid collars, and protective barriers are part of the control system. Fixed shielding and distance are used before personal garments. Shielding is inspected according to the facility program, and damaged garments are removed from use. Control room windows, lead glass, and door interlocks are checked and never bypassed. Warning lights and signs must function. A room with a faulty indicator is taken out of service until qualified personnel repair it.

Infection prevention follows standard precautions. Perform hand hygiene before and after patient contact, wear gloves for contact with blood or body fluids, and clean contact surfaces such as tables, grips, headrests, and control panels between patients using a disinfectant approved for the surface. Follow the label contact time. Single-use covers reduce cross-contamination. Sterile technique is used where the procedure requires it. Sharps go into puncture-resistant containers and are never recapped. Follow isolation procedures for infectious patients.

Privacy and information security are part of patient safety. Images, reports, and worklist data contain protected health information. Staff log in with individual credentials, lock workstations, avoid displaying images in public areas, and send images only through approved systems. Personal devices are not used to photograph screens or images. Access to records is limited to people with a clinical or operational need, and connections to picture archiving and worklist systems are managed by the information technology team.

• Mandatory: Remove damaged lead garments from service and report them to the designated officer.
• Mandatory: Do not bypass door interlocks, warning lights, or emergency stop functions.
• Mandatory: Clean and disinfect contact surfaces between patients using approved products.
• Recommended: Store contrast and emergency medications in labeled locations with storage conditions stated by the manufacturer.

6Incident Reporting, Emergencies, and Escalation

Report every incident, near miss, and unsafe condition through the facility reporting system as soon as the patient is safe. Examples include wrong patient or wrong side imaging, contrast reaction, fall, unexpected exposure, lost dosimeter, damaged shielding, MRI projectile events, and privacy breaches. Reports should be factual and free of blame so the system can learn. Near misses are reported because they reveal weaknesses before harm occurs.

Emergencies come first. Call the designated emergency response number or rapid response team, start basic life support only if trained, and use emergency equipment checked at the start of the shift. Do not bring ferromagnetic equipment into the MRI environment during a resuscitation. Remove a patient from the magnetic field area only when qualified personnel can do so safely. Escalate to the supervising clinician whenever a reaction, unexpected finding, or doubt about identity or consent arises, and stop the examination when continuing would increase risk. Unintended radiation exposure goes to the radiation safety officer without delay, who manages any regulatory reporting duties.

• Mandatory: Stop the procedure and inform the supervising clinician when identity, consent, or patient safety is in doubt.
• Mandatory: Report unintended radiation exposure to the radiation safety officer during the same shift.
• Mandatory: Keep emergency contact numbers and resuscitation equipment accessible in every imaging room.
• Recommended: Hold a short debrief after significant incidents to identify root causes and corrective actions.

7Records, Training, Inspection, and Review

Records prove that controls operate. Maintain exposure records, dosimetry results, equipment checks, shielding inspection logs, contrast reaction records, consent documentation, competency sign-offs, and incident reports. Retention periods are set by local law, so verify them with the competent authority or the facility records office. Patient information is not stored on personal devices or unapproved cloud services.

Training is role specific and refreshed at intervals set by the facility and regulator. Core topics include radiation protection, MRI safety, contrast management, emergency response, infection prevention, privacy, and patient communication. Training is confirmed by practical assessment, not attendance alone. Audits check identification, consent, repeat image rates, and protocol adherence, and the quality committee reviews the results. These norms are updated when equipment changes, when incidents reveal gaps, or when recognized professional guidance changes, with signed acknowledgment from staff.

• Mandatory: Complete documented competency assessment before independent practice on any modality.
• Recommended: Audit a sample of examinations at a set interval for identification and consent compliance.
• Recommended: Track repeat exposure and repeat image rates to identify protocol or training gaps.

Implementation checklist

• Confirm the order, patient identity, and examination using two identifiers before any exposure.
• Document pregnancy and contrast allergy screening before radiation or contrast is given.
• Verify consent, and escalate any doubt to the supervising clinician before proceeding.
• Use only the approved protocol and the lowest exposure consistent with diagnostic quality.
• Confirm you hold current authorization for the modality and task you are performing.
• Complete MRI screening and remove ferromagnetic items before anyone enters the zoned area.
• Perform hand hygiene and disinfect contact surfaces between patients using approved products.
• Lock workstations and send images only through approved systems to protect privacy.
• Report incidents and near misses during the same shift through the facility system.
• Confirm emergency equipment and contact numbers are accessible in the room before starting.
• Verify local regulations, standards, and manufacturer instructions with competent authorities.