Posture scanning, what the camera measures and what a posture number cannot tell you

Posture scanning at Source Chiropractic uses a Moti Physio three-dimensional scanner, a depth camera with analysis software, to record how you stand. It takes about a minute, there's no radiation, and nothing touches you. We use the result as a measurement you can keep and compare later. It doesn't diagnose anything, and it's kept apart from the examination at our Clarksville practice. The manufacturer describes its own software the same way. The one published study comparing it with X-rays found a real margin of error, and the research linking posture to pain is thinner than the pictures suggest. The sections below take each of those in turn.

What is a posture scan?

You stand on a mat in front of a small camera for about a minute. The camera is an infrared depth sensor, the same kind of technology found in some phones and game consoles. It records the shape of your body's surface, not an image of your bones. Software then estimates where your joints are, draws a figure over the recording, and reports angles: how far forward your head sits relative to your shoulders, the tilt of your pelvis, the side-on curves of your spine, and left-to-right differences. Calivus Labs, the US distributor, describes the output as joint angles, movement range and symmetry, and comparisons between sessions.

What you get is a set of numbers and a rendered figure, which can be printed or emailed.

What does the manufacturer say it is?

This matters more than anything the scan shows you. The software's own license agreement (MGsolutions, version 2.1, read September 16, 2026) calls it "non-medical software intended solely for general wellness and health-promotion purposes" and says it "is not a medical device and is not intended for the diagnosis, cure, mitigation, treatment, or prevention of any disease or medical condition", and the manufacturer's support pages add that medical use is prohibited.

The same manufacturer calls the device "X-ray-like", and its US distributor pitches it to clinics as a way to get patients to "commit to care plans" and "stick with you longer". That's sales copy aimed at clinics, and it isn't how we use it. For us the scan is a measurement, and we don't build a plan of care on it.

How accurate is a posture scan compared with an X-ray?

The manufacturer points to a hospital study that compared its software with full-body X-rays. The study is real, and the details matter. In 2020, seventy rehabilitation patients at a Korean university hospital were measured on the same day by EOS radiography and by this software (version 2.11) with a depth camera (it's listed in the research notes below). Three measurements, forward head position, the tilt of the first thoracic vertebra and the tilt of the pelvis, correlated moderately with the X-ray values. Knee flexion and the low back curve correlated fairly. On four of the seven measurements, the two methods disagreed by a statistically significant margin. The authors call the validation acceptable and say the accuracy needs to improve. They also note that clothing distorts the surface the camera reads, that the test position wasn't the one the software normally uses, and that the software has been updated since.

So here's what "compared with X-ray" means in practice. The scan follows the general direction of the X-ray measurement, but the margin is wide enough that a single number, or a few degrees of change between two scans, shouldn't be read as fact. A change between visits may be the software's estimate moving, your clothes, or how you happened to stand that day.

What do the colors and figures on a scan mean?

The software colors muscles red for "tightness" and blue for "weakness", and it can show an "ideal", "current" and "worsened" version of your figure side by side. These are renderings, not findings. The colors are the software's classification from the shape of your surface, and no muscle is actually measured. The "ideal" is the software's reference model. The "worsened" figure shows what the model would look like with the angles pushed further. It isn't a prediction about you, and nobody at this practice will present it as one.

What can a posture scan tell you about pain?

Less than the pictures suggest.

• Back pain. A 2020 review of 41 systematic reviews found both positive and null associations between spinal posture and low back pain. Reviews limited to studies that followed people over time were less able to reach consistent conclusions, and the review found no evidence that posture comes before a first episode of low back pain (it's in the research notes below). An earlier review of 54 studies found no strong evidence linking the side-on curves of the spine to any health outcome, including spinal pain.
• Neck pain. Adults with neck pain do, on average, hold the head further forward than adults without it, and the posture correlates with pain and disability scores. The difference is about three degrees. That's of the same order as the differences between age groups and between men and women in the same data (about 2.4 and 2.6 degrees). Every study behind it is a snapshot, too, so none of them can say which came first, the posture or the pain. In adolescents, no such difference was found.

So a posture measurement describes how you were standing, at that moment, in those clothes. It can't show that your posture caused your pain, and correcting a number isn't a treatment goal. Our posture article makes the same point from the other side: most posture questions are really questions about a task, and the task is where the useful changes are.

Where does a posture scan fit at Source Chiropractic?

A scan is a posture record: a picture of how you stand that you can see, keep and compare with a later one. It's separate from the examination. The manufacturer's license limits the software to general wellness use and prohibits medical use, so we don't use a scan to diagnose anything. A diagnosis and a plan come from the examination, by hand and by watching you move, not from the scan.

A repeat scan, if there is one, is a repeat measurement with the margin described above. A repeat scan alone isn't a reason to continue care. Deciding to keep coming in is its own decision, and our wellness care guide sets out what the evidence supports.

What are the risks of a posture scan?

The scan itself carries no physical risk. It's a camera: no radiation, no contact, no force. There are two other things to know about.

The first is privacy. A scan is a recording of your body's shape plus a set of measurements. Is it kept, and if so, where (in our own records, the scanner's software, or both), for how long, and who can see it? Those are fair questions to put to us before a scan. The manufacturer says its software is built with HIPAA compliance in mind. That's the manufacturer's phrasing, not a description of how we store a scan, and our own obligations for anything we keep about you apply to a scan just as they do to the rest of your record.

The second is the picture. A "worsened" figure, or a body colored red, can convince a person their spine is damaged or deteriorating, when the evidence above says a posture number doesn't carry that meaning. A scan that worries you is worth bringing up, because the number describes how you stood that day, and that's all it describes.

What are the other options for a posture question?

For a posture question, the best-supported options aren't measurements at all. Our posture article covers desk and workstation setup, changes of position, breaks from a repetitive task and staying active. For neck or back pain, our guides on neck pain and back pain describe the exam, the warning signs that need medical assessment first, and the care options, and none of them begins with a picture of your posture. A physical therapist, a medical doctor and a spine specialist each cover something different, and when a finding isn't ours to handle, referral is part of the plan.

What should I ask before a posture scan?

When you call to book, you can check if a scan is part of your visit, if it'll be repeated, and if it carries a separate charge. The new-patient offer has its own terms, and this page does not describe the scan as part of them.

If a scan is repeated, the same margin applies both times, so how much change would really mean something is worth talking about before anyone reads progress into it.

If we are not able to help you with your problem or are unable to reduce your pain levels, we will make sure to give you a recommendation to another experienced provider.

Whatever brought you in, the history and exam are what decide your care, and a scan never takes their place.