MRI

MRI (magnetic resonance imaging) is a scan that uses a strong magnet and radio waves, not radiation, to produce detailed pictures of soft tissues inside the body. It is especially good at showing how far a tumor extends into structures like the chest wall, diaphragm, heart sac, or spine, which CT scans sometimes miss.

Origin

The underlying physics, nuclear magnetic resonance, was described by Isidor Rabi in 1938 and later by Felix Bloch and Edward Purcell in 1946. Paul Lauterbur and Peter Mansfield adapted the technique to produce images of the human body in the 1970s, work that earned them the 2003 Nobel Prize in Medicine.

Significance in Asbestos Context

For patients with mesothelioma or other asbestos-related cancers, MRI is often ordered after a CT scan to answer specific questions that affect treatment decisions, particularly whether a pleural tumor has grown through the diaphragm, into the chest wall, into the heart sac, or along nerves. This information helps surgeons decide whether an operation like pleurectomy/decortication or extrapleural pneumonectomy is feasible. MRI findings also appear in staging reports and expert medical opinions used to support a legal claim, because they document the extent and aggressiveness of the disease. Patients should ask whether an MRI is needed before surgery is planned, and request that the imaging report and the actual image files (on disc or through a patient portal) be preserved.

Example Sentence

After the CT scan showed pleural thickening, her oncologist ordered an MRI to determine whether the mesothelioma had invaded the diaphragm before referring her to a thoracic surgeon.

Related Terms

CT Scan, PET Scan, Staging, Pleural Mesothelioma, Extrapleural Pneumonectomy, Diaphragm

Notes

• Ask your oncologist whether MRI (in addition to CT and PET) is appropriate for staging your specific tumor, particularly if surgery is being considered.
• Request copies of all imaging reports and the image files themselves; these become important evidence in both medical second opinions and legal claims.
• Tell the technologist about any implanted devices (pacemaker, defibrillator, certain stents, surgical clips, cochlear implants) before the scan. Some are MRI-incompatible.
• If you are claustrophobic, ask about an open MRI or mild sedation; an incomplete scan due to anxiety can delay treatment planning.