Getting Ahead of a Dementia Diagnosis: Is a Whole Body MRI Scan the Answer?

In 2021,  an estimated 57 million people worldwide were living with dementia.

Dementia is a broad term used to describe a group of diseases that affect cognitive function, including memory, thinking, and the ability to perform daily activities.

With Dementia cases estimated to double by 2060, how can we aim to get ahead of a potentially life-threatening diagnosis?

What is Dementia?

Dementia is an umbrella term for the deterioration of one’s memory, language, problem-solving skills, and other cognitive abilities that interfere with daily life. The most common diseases that cause dementia include vascular, Lewy body, frontotemporal, and, most recognizable, Alzheimer’s disease.

Warning Signs and Symptoms of Dementia

Dementia symptoms are progressive, meaning symptoms tend to start slowly and gradually worsen over time. Early signs of dementia may include changes in mood or behavior, which may go unnoticed until memory problems begin to present themselves.

Early signs of dementia can include:

• Losing or misplacing items
• Forgetfulness
• Getting lost while walking or driving
• Confusion, even in familiar places
• Difficulties in problem-solving or decision-making
• Difficulty performing familiar tasks

Dementia Rates are on the Rise, but Why?

According to a recent study published in the journal Nature Medicine, a person who reaches age 55 without dementia has roughly a 42 percent chance of developing it at some point in the rest of their life, with most of that risk arriving in the oldest years. The same research found risk runs higher for women, for Black adults, and for people carrying the APOE e4 gene variant.

In the United States, the number of people newly diagnosed each year is projected to roughly double, from about 514,000 in 2020 to about 1 million a year by 2060.

So, the question is, why are dementia rates rising at an alarming pace?

There are several factors attributed to the rise in dementia cases, but the most prevalent are due to increased life expectancy and an aging population. Dementia presents the most significant risk to the older population, and as advancements in healthcare and living conditions have led to longer lives, more people are living into the age range where dementia presents a higher risk.

Other factors that can contribute to the rise in dementia include environmental and health factors, genetics, and lifestyle choices, such as maintaining a healthy weight and diet, along with managing hearing loss and mental health.

Researchers within the study stated, “Accumulating data from clinical trials have linked healthy lifestyle behaviors, the absence of vascular risk factors, and hearing rehabilitation with improved cognitive outcomes.”

The research findings suggest a need for policies that enhance healthy aging to help reduce the ever-present danger of a dementia diagnosis.

Can an MRI Scan Diagnose Dementia?

No. And any clinic that tells you otherwise is selling you something.

Dementia is what doctors call a clinical diagnosis. It is made by a physician who takes a careful history, usually including a conversation with someone who lives with you, assesses memory, language and reasoning with structured cognitive testing, performs a neurological examination, and runs blood work to check for treatable things like vitamin B12 deficiency and thyroid problems that can look like cognitive decline. Where a specific disease such as Alzheimer’s needs confirming, that comes from biomarkers: amyloid and tau PET imaging, cerebrospinal fluid testing, and newer blood-based markers. None of that is an MRI.

So where does imaging fit?

It plays a real supporting role, and it is worth being precise about it. A dedicated brain MRI can show patterns of structural change that support a physician’s impression, such as shrinkage in the hippocampus associated with Alzheimer’s. It can measure small vessel disease in the white matter, which speaks to vascular contributions to cognitive decline. And it can find conditions that produce dementia-like symptoms but have different and sometimes treatable causes: a brain tumour, a chronic subdural haematoma from an old fall, or normal pressure hydrocephalus. Finding one of those changes the entire course of care.

But atrophy on a scan is not a diagnosis. Some brain shrinkage is a normal part of ageing, people with dementia sometimes have unremarkable MRIs, and atrophy patterns overlap between conditions. The image is one input among several. It does not decide the question.

There is one more distinction worth understanding. When a neurologist orders imaging for memory symptoms, they order a dedicated non-contrast MRI of the head, built around that specific question. A whole-body screening MRI is a different examination with a different job. It surveys head to pelvis looking broadly across organ systems, it includes the brain, and it can show significant structural findings there. It is not a dedicated dementia protocol and we will not tell you it is one.

And if the underlying question is whether you can scan your way to knowing if dementia is coming, the honest answer is that no medical body recommends imaging asymptomatic people to predict dementia, and no study has shown it improves how anyone does. The U.S. Preventive Services Task Force reviewed screening older adults for cognitive impairment and concluded the evidence was insufficient to weigh benefits against harms.

What Actually Works for Dementia Early Detection and Prevention

This is the part worth your attention, and it is genuinely hopeful.

The Lancet Commission on dementia concluded in its 2024 report that around 45 percent of dementia cases worldwide are potentially preventable or delayable by addressing 14 modifiable risk factors across a lifetime: hearing loss, untreated vision loss, high blood pressure, high LDL cholesterol, diabetes, obesity, smoking, excessive alcohol, physical inactivity, social isolation, depression, head injury, air pollution and limited education. The World Health Organization adopted the same 45 percent figure in its updated guidance in 2026.

Several of those are cardiovascular and metabolic, which is territory a whole-body scan legitimately touches. That is where our scan earns a place in this conversation: not as a dementia test, but as one way of getting a broader picture of the vascular and metabolic health sitting underneath a meaningful share of that 45 percent. Paired with the things that genuinely move the needle, that is what getting ahead of dementia actually looks like.

If you are noticing memory changes, the right first step is a conversation with your physician, not a scan you booked yourself. If you want a broad structural baseline while you are well, schedule an appointment or talk to our team first.

This article is for general education and is not medical advice.