ALARA in Dentistry: How to Keep X-Ray Exposure Low

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By MVD Team
The MVD X-Ray Technologies team is made up of engineers, software developers, and x-ray technician specialists dedicated to improving digital radiography quality assurance across Canada. We combine expertise in medical device design, radiation safety, and AI-based image analysis to help clinics stay compliant and confident in their daily QA routines.

Every dental X-ray involves a small amount of radiation. ALARA is the principle that keeps it in check.

Short for "As Low As Reasonably Achievable," ALARA is one of the foundations of safe dental imaging and a core expectation under Safety Code 30.

Here is what ALARA means in practice, and how clinics put it to work every day.

What ALARA Really Means

ALARA is not about avoiding X-rays. Diagnostic imaging is essential to good dental care.

It is about making sure every exposure is justified, optimized, and never higher than it needs to be.

In other words: get the diagnostic image you need, with the lowest dose that still does the job.

The Three Pillars of ALARA

Most ALARA guidance comes down to three ideas:

  • Justification - only take an X-ray when it will genuinely inform care
  • Optimization - use the right settings, technique, and equipment for each patient
  • Limitation - keep dose within recognized limits for patients and staff

How Clinics Reduce Exposure Without Losing Image Quality

Lower dose should never mean weaker diagnostics. The goal is balance.

Practical steps include:

  • Using correct exposure settings for each patient and region
  • Maintaining sensors and equipment so images are right the first time
  • Avoiding retakes through consistent technique and quality assurance
  • Applying shielding and collimation appropriately

Retakes are one of the biggest hidden sources of extra exposure, and one of the easiest to prevent.

Where Quality Assurance Fits In

Consistent QA is one of the most effective ALARA tools a clinic has.

When equipment is verified daily, the problems that cause poor images, and therefore retakes, get caught early.

Patient safety and dose reduction go hand in hand with reliable, well-documented testing.

Making ALARA Effortless

ALARA is easier to maintain when it is built into your workflow instead of left to memory.

The Phantom XY System helps clinics keep image quality high and retakes low, supporting ALARA every single day.

Want to see how digital QA supports lower exposure and better images? Book a demo.

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