Quick Answer: CBCT Scan Duration
A typical CBCT scan takes 10-40 seconds for the actual image acquisition, with most dental CBCT scans completing in under 30 seconds. The entire appointment, including positioning and preparation, usually lasts 15-30 minutes.
Actual scan time: 10-40 seconds; Total appointment time: 15-30 minutes
Understanding CBCT Scan Time Components
Key Imaging Findings
Image Acquisition Time
The actual X-ray exposure time ranges from 10-40 seconds depending on the machine and scan protocol. Most modern dental CBCT units complete the scan in 20-30 seconds. During this time, you must remain completely still.
Patient Positioning
Takes 5-10 minutes. The technologist will help you position your head correctly in the machine. Proper positioning is crucial for obtaining diagnostic images and may require adjustments.
Image Processing
Takes 2-5 minutes after the scan. The computer reconstructs the raw data into 3D images. Modern CBCT systems can generate images almost immediately after acquisition.
Consultation Time
5-10 minutes for reviewing results with your dentist. They may show you the 3D images and explain the findings. This is optional if results are being sent to a specialist.
Factors Affecting CBCT Scan Duration
What Else Could It Be?
Takes 10-20 seconds; scans limited area (e.g., single jaw quadrant); lowest radiation dose
Takes 20-30 seconds; scans both jaws or larger region; moderate radiation dose
Takes 30-40 seconds; scans entire head and neck region; higher radiation dose but still less than medical CT
May take slightly longer (30-40 seconds); provides finest detail for precise measurements
What Happens During Your CBCT Scan
What Happens Next?
Check-in and preparation
You'll remove jewelry, glasses, and any metal objects. If you wear removable dental appliances, you'll need to take them out. The technologist will explain the procedure.
Positioning
You'll sit or stand in the CBCT machine. The technologist will position your head using chin rests and forehead stabilizers. You'll bite on a bite guide if needed for your scan type.
The scan
The machine's arm will rotate 360 degrees around your head. You must stay completely still. The machine makes a whirring sound but the scan is completely painless. Some machines require you to hold your breath briefly.
Post-scan
The technologist will check image quality. If images are satisfactory, you're done! If you moved during the scan, it may need to be repeated.
Why CBCT is Faster Than Traditional CT
| Aspect | CBCT | Medical CT |
|---|---|---|
| Scan Time | 10-40 seconds | 2-5 minutes |
| Patient Positioning | Seated/Standing | Supine (lying down) |
| Rotation | Single 360° rotation | Multiple rotations |
| Image Processing | Near-instant | May take longer |
| Total Appointment | 15-30 minutes | 30-60 minutes |
Tips for a Faster Scan
- Arrive on time - Late arrival may reduce your appointment slot
- Remove metal beforehand - Take off jewelry and glasses before entering the room
- Follow positioning instructions - Proper positioning reduces adjustment time
- Stay still during scan - Movement requires repeat scans, doubling your time
- Ask questions beforehand - Clarify concerns before the scan starts
Frequently Asked Questions
Q: Can I drive myself home after a CBCT scan? A: Yes, CBCT scans have no sedation and no recovery period. You can drive and return to normal activities immediately.
Q: Will I feel anything during the scan? A: No, CBCT scanning is completely painless. You won't feel any sensation during the X-ray exposure. The machine may make noise, but that's it.
Q: What if I move during the scan? A: Minor movements may cause blurring. Significant movement requires a repeat scan. The technologist will check image quality before you leave.
Q: How soon will my dentist get the results? A: Images are typically available immediately after processing. Your referring dentist can access them within 24-48 hours, or instantly if the system is integrated.
Q: Can I return to work after my scan? A: Yes, there's no downtime. You can return to work, school, or any normal activity immediately after your appointment.
References
- American Academy of Oral and Maxillofacial Radiology. AAOMR Position Paper on CBCT Imaging Parameters. 2023.
- European Society of Radiology. ESOR Guidelines for Dental CBCT Acquisition Protocols. 2022.
Medical Disclaimer: This information is educational only. Always discuss your specific situation with your healthcare provider for personalized medical advice.