Episode 404: Whole-Body MRI, CT Scans, and What Imaging Can Tell You — Matthew Paul Clemons, MD

Matthew Paul Clemons, MD, is a diagnostic radiologist specializing in nuclear medicine and body imaging. He is Head of Nuclear Medicine at Radiology Partners Houston and a rectal and prostate cancer specialist. Whole-body MRI promises a detailed look under the hood—but what can a quick screening scan actually see, miss, and send you chasing? Dr. Paul Clemons explains why a whole-body MRI is a limited study, how incidental findings can lead to further tests, and why standard screening remains the better choice for most people. Expect to learn how MRI creates images and why scan protocols take time, why open MRI systems can have important image-quality limits, how PET/MRI adds functional information, why CT and MRI can be complementary rather than redundant, how radiation and implanted devices factor into decisions, why spine findings do not always match symptoms, when conservative care deserves consideration, and where DEXA versus MRI can be useful for tracking body-composition trends. Episodes you'll enjoy next: #237 — Demystifying Body Composition Testing with Dr Grant Tinsley and Dr Eric Helms: a practical companion discussion on body-composition measurement and its limits. #159 — Advice, Mentorships, Askholes, and Diagnostics: An Interview with Dr. Adam Sumarski: a related conversation on diagnostics and imaging in sports medicine. Episode Timestamps: 1:50 Whole-body MRI and preventive screening 2:52 How MRI works: magnets, noise, and safety 7:05 Open MRI, magnet strength, and image quality 9:05 MRI sequences, scan time, and diagnostic protocols 11:47 Why whole-body MRI is a limited screen 12:46 Incidental findings and downstream testing 13:57 High-risk screening, rare genetic conditions, and lung limits 17:53 Sensitivity, specificity, and standard screening 24:15 PET/MRI and where whole-body imaging has a clinical role 27:05 Why MRI and PET/CT systems are expensive to install 31:59 MRI safety, implants, and pacemakers 36:36 CT versus MRI: why one scan can lead to another 38:52 Whole-body CT, radiation, and its limits 43:47 Back-pain scans: why an image may not explain symptoms 51:44 Physical therapy, surgery, and warning signs 58:46 Evaluating evidence for peptides, stem cells, and biologics 1:05:47 Choosing an orthopedic surgeon for athletic goals 1:15:24 DEXA versus MRI for body-composition trends Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter