What does a Prenuvo or Ezra scan look for?

A Prenuvo or Ezra scan looks for solid-organ cancers, brain aneurysms, spine and joint issues, and major structural abnormalities across most of the body in 60 minutes. They do not screen for lung cancer (low-dose CT is better) or heart artery disease (CCTA is better).

How much does a full-body MRI cost?

A full-body MRI costs about $1,500 to $2,500 self-pay, depending on the company and location. Insurance does not typically cover screening MRI in asymptomatic patients. We help you weigh the cost against your specific risk profile.

Is a full-body MRI safe?

A full-body MRI is safe for most patients because it uses no radiation. The main risks are claustrophobia, gadolinium contrast reactions if contrast is used, and the downstream consequences of incidental findings. Patients with certain implants cannot have an MRI.

How long does the scan take?

The scan takes about 60 minutes inside the magnet. The full appointment is usually 90 minutes including check-in, IV placement if needed, and changing. The report is typically delivered within 7 to 14 days.

Will the scan detect early-stage cancer?

The scan will detect many early-stage solid-organ cancers, especially in the kidney, liver, pancreas, ovary, and prostate. Sensitivity for very small tumors (under 5 to 10 mm) is limited, and the scan is not validated for lung, breast, or colon screening.

What is an "incidentaloma" and why does it matter?

An "incidentaloma" is a finding on a scan that is unrelated to why the scan was done, often benign. It matters because each one creates a follow-up decision. Most lead to nothing. Some lead to extra scans, biopsies, and stress. The right physician partner separates signal from noise.

Will my insurance cover a full-body MRI?

Insurance does not typically cover a full-body MRI for screening. It is considered preventive and self-pay. HSAs and FSAs sometimes apply. We can help you decide if the spend matches your goals.

Can I have a full-body MRI with claustrophobia?

You can often have a full-body MRI with claustrophobia, especially at imaging centers with wide-bore or open scanners like Prenuvo. Some centers offer mild oral sedation. We can prescribe a one-time low-dose anxiolytic if needed.

How does diffusion-weighted imaging (DWI) detect cancer?

Diffusion-weighted imaging (DWI) detects cancer by measuring how water moves inside tissue. Cancer cells are densely packed, so water movement is restricted, and tumors light up bright on DWI maps. This makes solid tumors stand out without contrast in many cases.

What is the difference between Prenuvo and Ezra?

The difference between Prenuvo and Ezra is hardware versus software. Prenuvo invests in proprietary scanner coils and a tightly controlled protocol. Ezra layers AI analysis on standard hospital MRI machines. Both produce useful reports. Prenuvo tends to be longer and more comprehensive. Ezra is often faster and cheaper.

Should I get a full-body MRI if I have BRCA1 or Lynch syndrome?

You should consider a full-body MRI if you have BRCA1, Lynch syndrome, or another high-risk genetic mutation. Patients with these mutations often benefit from earlier and more frequent imaging. The screening plan should be coordinated with a genetic counselor and oncologist familiar with the syndrome.

How does whole-body MRI compare to PET-CT for cancer screening?

Whole-body MRI compares favorably to PET-CT for screening because it uses no radiation and is better at detecting solid-organ tumors. PET-CT is reserved for known cancer staging and recurrence monitoring, not for screening healthy patients, since it delivers significant radiation.

What is a "Bosniak classification" for kidney cysts?

The Bosniak classification grades kidney cysts from I (clearly benign) to IV (clearly malignant). Most incidental kidney cysts found on a screening MRI are Bosniak I or II and need no follow-up. Bosniak III and IV usually need urology evaluation and possible biopsy or surgery.

How often should I repeat a full-body MRI?

You should repeat a full-body MRI every 2 to 3 years for most patients with no positive findings. Patients with high-risk genetic mutations may benefit from yearly scans coordinated with their oncology team. Annual scans for low-risk patients are usually overkill.

What is gadolinium retention and is it dangerous?

Gadolinium retention is the accumulation of gadolinium contrast in brain, bone, and other tissues over many MRI scans. Newer macrocyclic gadolinium agents have much lower retention. Most full-body MRI providers now skip contrast for screening, which avoids the issue entirely.

Can a full-body MRI detect early Alzheimer's or vascular dementia?

A full-body MRI can detect structural changes associated with vascular dementia, like white matter disease and small infarcts, and atrophy patterns that suggest Alzheimer's. It is not a stand-alone diagnostic test, but it adds useful context to a cognitive evaluation.

How sensitive is whole-body MRI for pancreatic cancer?

Whole-body MRI is moderately sensitive for pancreatic cancer, especially with dedicated pancreas sequences and contrast. It can detect cysts, masses, and ductal changes that might point to early disease. For high-risk patients, dedicated pancreas MRI or endoscopic ultrasound may be added.

What happens if my full-body MRI finds a small lung nodule?

If your full-body MRI finds a small lung nodule, the next step is usually a low-dose CT of the chest, which is better for lung evaluation. Most small nodules are benign, especially under 6 mm. We follow Fleischner Society guidelines for follow-up timing.

How does Fishtown Medicine triage Prenuvo or Ezra reports?

Fishtown Medicine triages Prenuvo or Ezra reports by separating actionable findings from cosmetic ones. We focus on lesions that change management, ignore lesions that do not, and coordinate any follow-up imaging or specialist referrals through one inbox so you are not chasing six different doctors.

Why does Fishtown Medicine recommend pairing a full-body MRI with [Galleri](/diagnostics/grail-gallery)?

Fishtown Medicine recommends pairing a full-body MRI with Galleri because the two tools complement each other. MRI sees structural disease in solid organs. Galleri detects molecular cancer signals in the blood across 50-plus cancer types, including ones that are hard to see on MRI like esophageal, gastric, and colon cancer.

TL;DR · 30-second take

A full-body MRI is a 60-minute scan that uses powerful magnets and diffusion-weighted imaging to look at most solid organs (brain, spine, liver, kidney, pancreas, prostate, ovaries) without radiation. It can find early cancers and brain aneurysms, but it also finds harmless quirks that drive follow-up scans and anxiety, the so-called incidentaloma tax.

Full-Body MRI in Philadelphia: A Clinical Review

Medicine has historically been reactive. We wait for you to cough up blood before we scan your lungs. We wait for you to turn yellow before we scan your liver. By the time symptoms appear, the disease is often advanced. Whole-body MRI flips that model. Whole-body MRI, offered by companies like Prenuvo and Ezra, is a proactive screen of all solid organs (brain, spine, liver, kidney, pancreas, spleen, pelvis) in about 60 minutes. The superpower is diffusion-weighted imaging (DWI), which makes tumors glow because cancer cells are denser than healthy tissue. The caveat is that it sees everything, including harmless quirks. That creates the "incidentaloma tax."

Why use MRI for whole-body screening?

We use MRI for whole-body screening because it has two key advantages over CT.

No radiation

Unlike a CT scan, which is essentially a 3D X-ray using ionizing radiation, MRI uses magnets. You can have many MRIs a year with zero DNA damage. That makes MRI viable for proactive, repeat screening.

Soft-tissue contrast

MRI is superior to CT for soft, squishy organs like the brain, liver, pancreas, and prostate. It is inferior to CT for "hard or air" structures like the lungs, bone, and coronary arteries. A whole-body MRI is not a good lung cancer screen (use low-dose CT) and not a heart attack screen (use CCTA with Cleerly).

What can a whole-body MRI catch?

A whole-body MRI can catch several silent, lethal conditions before they cause symptoms.

Silent cancers (solid tumors)

Pancreatic cancer: One of the most lethal cancers. MRI can catch cysts or early masses years before symptoms.
Kidney cancer (renal cell carcinoma): Often asymptomatic until the tumor is large.
Liver tumors: Both primary liver cancers and metastases.
Ovarian and testicular cancers: Often missed on routine exams.

Vascular safety (aneurysms)

Brain aneurysms: A "ticking time bomb" in some families. We can see whether the Circle of Willis has a bubble. Under 3 mm, we watch. Over 7 mm, we typically refer for clipping or coiling. Saves lives.

Neurological baseline

White matter hyperintensities: Early signs of vascular disease or MS.
Disc herniations: Spinal stenosis before it becomes crippling.

Who is a full-body MRI for?

A full-body MRI is for two main groups:

The "executive physical" mindset

You treat your body like an enterprise asset. You want a detailed audit. The cost (about $2,500) is small compared with the cost of a missed diagnosis at Stage 3.

Cancer anxiety with family loss

You have lost friends or family to sudden, late-stage cancer. The not-knowing affects your daily life. The scan can buy you 2 to 3 years of psychological clarity, especially when paired with Galleri and a genetic review.

Who is a full-body MRI NOT for?

A full-body MRI is not for everyone, and we are honest about the trade-offs.

The medical-cascade vulnerable

This is key. If we scan 100 healthy adults:

About 20 will have a "liver hemangioma" (a benign blood vessel knot).
About 15 will have "thyroid nodules" (almost always benign).
About 10 will have "kidney cysts."

If you get this report and panic, you can end up in a chain of follow-up scans, biopsies, and sleepless nights for conditions that would never have hurt you. You must be mentally ready to tolerate ambiguity.

Implant holders

If you have a pacemaker, cochlear implant, or older metal shrapnel or aneurysm clips, you may not be able to enter the magnet. Modern conditional pacemakers are sometimes safe under specific protocols. Always ask the imaging team.

What is the strategic roadmap for a full-body MRI?

The strategic roadmap for a full-body MRI covers selection, scanning, and the most important step: clinical interpretation. We facilitate referrals to Prenuvo (hardware-focused, proprietary coils) or Ezra (software-focused, AI overlay on standard machines).

The scan: 60 minutes. Loud banging noises (magnets). Claustrophobic warning. Prenuvo has open-style coils that help.
The report: A 30-page PDF of your anatomy.
The review (most important step):

The clinic acts as the filter.
Report: "Hyperintense lesion on segment 4 of liver."
Us: "That is a hemangioma. It is a birthmark. Ignore it."
Report: "2 cm complex cyst on kidney."
Us: "That needs a targeted diagnostic follow-up. We coordinate it for you."

The scan gives you data. We give you context.

Scientific References

Hricak H, et al. "Medical imaging and nuclear medicine: a Lancet Oncology Commission." The Lancet Oncology. 2021.
Caglic I, et al. "Whole-body magnetic resonance imaging for cancer screening: A review." European Journal of Radiology. 2022.
Saya S, et al. "Surveillance Strategies and Outcomes in Lynch Syndrome." JAMA. 2018.
Westwood M, et al. "Whole-body magnetic resonance imaging for staging and monitoring." Health Technology Assessment. 2020.

Dr. Ash is a board-certified internal medicine physician at Fishtown Medicine in Philadelphia. He practices Medicine 3.0 preventive medicine so problems are found early, when they are still solvable.

Fishtown Medicine | Diagnostics

2418 E York St, Philadelphia, PA 19125(267) 360-7927 hello@fishtownmedicine.comHSA/FSA Eligible

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Medical Disclaimer: This resource provides clinical context for educational purposes. In the world of Precision Medicine, there is no "one size fits all", the right plan must be matched to your unique lab work, physiology, and goals. Consult Dr. Ash to determine if this approach is right for you, especially if you have chronic health conditions or are taking prescription medications.

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TL;DR · 30-second take

Full-Body MRI in Philadelphia: A Clinical Review