Should I prepare myself for the scan?
No special preparation is needed for a CBCT scan. Anything that might interfere with the imaging such as earrings, necklaces, piercings, hairpins or eyeglasses should be removed. This interference takes the form of ‘scatter’, which distorts the image in the immediately surrounding area. The x-ray technician may ask you to remove dentures or other appliances, but it is advisable to bring these along to the appointment, as the technician may on occasion be required to incorporate them into the scan.
Radiation Dosage Comparison Chart
We have taken some highlights to try and help you understand what these doses mean to you in compassion to other everyday sources of radiation you may not even think about. The full chart below shows the comparison of different sources of radiation in microSieverts.
|Radiation Source||Effective Dose uSv||Lifetime increase in cancer risk B (per Million exams)||Background equivalency|
|Airport security scan||0.1||18 minutes|
|Eating 1 banana||0.1||18 minutes|
|360 Visualise 3D Pediatric Low Dose CBCT (4×4 cm)||1.4||0.1||4 hours|
|360 Visualise 3D Adult Low Dose CBCT (5 x 5 cm)||5||0.3||0.5|
|Daily background dose (Cosmic Radiation)||8-10||1 day|
|Normal Dental Intra Oral X-ray Single PA or Bitewing (round collimation)||9.5||0.5||1 day|
|360 Visualise Panoramic OPG Exam (Paediatric)||12||0.7||1.5|
|360 Visualise Dual Jaw Low Dose CBCT (8×9)||19||1.1||2 days|
|360 Visualise Panoramic OPG Exam (Adult)||29||1.7||3.5 days|
|4 Bitewings (round collimation)||38||2||4 days|
|Flight from London to New York||50||6 days|
|360 Visualise 3D EndoHD CBCT (5 x 5 cm)||58||3.5||7 days|
|Full mouth series (digital)||171||9||21 days|
|Full mouth series (D-speed film)||388||21||47 days|
|Hospital CT scan of Jaw||2100||153||256|
|Background dose received each year||3000-3500||1 year|
† Based on studies conducted by John Ludlow, University of North Carolina, School of Dentistry, utilizing the CS 8100 3D dose protocol (Aug 2014, Nov 2015, May 2017).
‡ Jamali, J., Kolokythas, A. and Miloro, M., 2015. Clinical Applications of Digital Dental Technology, pp.6-8.
Effective dose calculations based on the revised guidelines given by the International Commission on Radiological Protection (ICRP 103).
A. Effective dose measured in microSieverts (?Sv) describes the effect on the body’s various tissues when exposed by radiation from various sources. Different types of tissues in our body all have different sensitivity to radiation.
B. According to the American Cancer Society, the average person (male or female) in the U.S. has a 20% chance of developing a fatal cancer during his or her lifetime (or 200,000 per million people). The table above shows that if a million people had a panoramic exam (adult), the total cancer rate would change from 200,000 per million to 200,001.7 per million, or a 0.00085% increased risk of developing cancer.
C. The average person in the U.S. receives approximately 8-10 ?Sv of effective dose of ionising radiation per day.