Is CBCT Safe for Children? — What Parents in Lahore Need to Know
A Parent’s Concern That Deserves a Thorough Answer
When a dentist or orthodontist recommends a CBCT scan for a child, the first reaction of most parents in Lahore is concern about radiation. It is a completely natural response. Children feel more vulnerable than adults, and the word radiation carries an anxiety that is difficult to set aside without a clear, honest explanation of what the scan actually involves and what the real risks are at the doses used in paediatric dental imaging.
At Alnoor Diagnostic Centre in Shadman, Lahore, we perform CBCT scans on paediatric patients regularly and understand that parents deserve precise answers rather than vague reassurances. This guide explains what the evidence actually shows about CBCT safety in children, why children require special consideration compared to adults, and what responsible paediatric CBCT practice looks like.
Why Children Require Special Consideration
Children are not simply smaller adults when it comes to radiation safety. Several biological factors make their tissues more sensitive to radiation than mature adult tissue, and these differences are clinically important when making decisions about paediatric imaging.
Children are in a state of active growth and rapid cell division. Cells that are dividing rapidly are generally more susceptible to radiation-induced DNA damage than cells in a stable, mature state. The organs and tissues of a growing child therefore carry a theoretically higher sensitivity to radiation effects than the equivalent tissues in an adult.
Children also have a longer life expectancy ahead of them than adults at the time of imaging. The stochastic risk from radiation — the small statistical increase in lifetime cancer risk — is cumulative and distributed across the remaining lifespan. A radiation exposure at age eight carries a longer window in which any theoretical long-term effect could manifest compared to the same exposure at age fifty. This longer potential consequence period is the primary reason paediatric radiation protection standards are stricter than those applied to adults.
These considerations do not mean CBCT is unsafe for children. They mean it must be used with greater justification, greater care in protocol selection, and greater attention to dose reduction than in adult imaging.
What the Actual Radiation Dose Involves
A paediatric dental CBCT scan delivers a radiation dose that varies considerably depending on the machine, the field of view selected, and the scanning protocol used. With paediatric-optimised low-dose protocols — which responsible imaging centres apply routinely for children — the dose from a small field of view CBCT scan is in the range of 20 to 100 microsieverts. A larger field of view scan delivers a higher dose, which is why field of view selection is a particularly important clinical decision in paediatric imaging.
To contextualise these numbers, children in Pakistan receive natural background radiation from the environment of approximately 2,000 to 3,000 microsieverts per year simply by living normally. A paediatric CBCT scan with a small field of view and optimised low-dose protocol delivers a dose comparable to a few days of this natural background exposure. The theoretical cancer risk from this level of exposure is extremely small — calculated to be in the range of one in several hundred thousand to one in a million for a single scan — and must be weighed against the genuine clinical benefit the scan provides.
The ALARA Principle Applied to Children
The guiding framework for all radiation use in medical imaging is ALARA — As Low As Reasonably Achievable. In paediatric imaging, this principle is applied with particular rigour through several practical measures that responsible imaging centres implement as standard.
Field of view selection is the most impactful dose reduction measure. The field of view determines how much tissue is irradiated — a small field targeting a single tooth region delivers far less radiation than a large field covering the entire skull. In children, the smallest field of view that adequately covers the clinical area of interest should always be selected. Using a full skull field of view when a smaller region would answer the clinical question is not acceptable paediatric radiological practice.
Resolution settings also affect dose. High-resolution scans deliver more radiation than standard resolution. For many paediatric clinical questions — impacted tooth localisation, jaw fracture assessment, orthodontic planning — standard resolution is entirely sufficient and should be selected in preference to high resolution protocols.
Paediatric-specific exposure settings reduce radiation dose further by adjusting tube current and voltage to the smaller anatomy of a child’s head, which requires less radiation to produce a diagnostic image than the larger anatomy of an adult. Modern CBCT machines have paediatric presets specifically designed for this purpose.
At Alnoor Diagnostic Centre in Shadman, Lahore, paediatric CBCT scans are performed using optimised low-dose protocols with field of view and resolution settings selected specifically for each child’s clinical indication and physical size.
When Is CBCT Justified in Children?
Strict clinical justification is required before any paediatric CBCT scan is performed. The clinical benefit must clearly outweigh the radiation risk — and this assessment must be made for each individual child rather than applied generically.
CBCT is clinically justified in children for accurate localisation of impacted teeth — particularly impacted canines and unerupted permanent teeth — where the three-dimensional position relative to adjacent roots cannot be reliably determined from two-dimensional X-rays. It is justified for cleft palate assessment before and after bone grafting, where precise bone defect measurement directly guides surgical planning. For assessment of jaw fractures after trauma, orthodontic planning involving significant skeletal discrepancies or jaw surgery, assessment of jaw cysts and pathology detected on routine imaging, and evaluation of the temporomandibular joints in children with suspected joint disease — all represent situations where the diagnostic information from CBCT genuinely changes clinical management in ways that justify the radiation involved.
CBCT is not justified as a routine screening tool, not appropriate as a substitute for simpler investigations that adequately answer the clinical question, and not indicated simply because it is available or because the parent or referring dentist requests it without specific clinical grounds. A responsible imaging centre declines paediatric CBCT requests that lack adequate clinical justification — and Alnoor Diagnostic Centre maintains this standard without exception.
Practical Considerations for Paediatric CBCT
Children must remain still during the scan for image quality to be adequate. Movement during the 10 to 20 second rotation causes motion artefacts that degrade the three-dimensional image and may necessitate a repeat scan — resulting in double the radiation exposure. Preparing the child before the appointment significantly reduces this risk.
Explain the procedure at home in simple, age-appropriate language before the appointment. Tell your child they will stand or sit next to a machine that will move around their head making a gentle sound for a few seconds, that it will not hurt, and that they must stay very still like a statue for just that brief moment. Children who understand what to expect cooperate far more reliably than those who encounter the machine without preparation. Our radiographers at Alnoor Diagnostic Centre are experienced in working with paediatric patients and take time to demonstrate the machine and explain the process in child-friendly terms before beginning.
CBCT Scanning for Children at Alnoor Diagnostic Centre, Lahore
At Alnoor Diagnostic Centre in Shadman, Lahore, every paediatric CBCT scan is performed using age-appropriate low-dose protocols with field of view and resolution settings optimised for the child’s size and clinical indication. Our experienced radiographers and radiologists ensure that every scan is both diagnostically adequate and performed with the minimum radiation dose necessary — fully consistent with the ALARA principle and international paediatric radiation protection guidelines.
If your child has been referred for a CBCT scan and you have questions about what the procedure involves or the radiation dose your child will receive, we encourage you to speak with our team before the appointment.