B-Read

A B-Read is a standardized interpretation of a chest X-ray performed by a physician specially certified to classify lung and pleural changes caused by mineral dust diseases like asbestosis. The reader uses the International Labour Organization (ILO) Classification system to assign a "profusion" score (from 0/0 to 3/3) describing how many small opacities appear in the lungs, and separately notes pleural plaques, thickening, and calcification. Only physicians who pass the NIOSH B Reader certification exam may issue these readings.

Origin

The B Reader program was established by the U.S. National Institute for Occupational Safety and Health (NIOSH) in 1974 to bring consistency to the reading of chest films for pneumoconiosis. The "B" designation indicates advanced proficiency beyond an "A" reader. The underlying ILO Classification of Radiographs of Pneumoconioses was first issued in 1950 and has been revised periodically, most recently in 2011 (with a 2022 digital update).

Significance in Asbestos Context

For a patient, a B-Read is often the document that translates an X-ray into evidence a court or trust will accept. Many state filing statutes and asbestos bankruptcy trust distribution procedures require a qualifying B-Read (commonly a profusion rating of 1/0 or higher, or documented bilateral pleural plaques) before an asbestosis or pleural disease claim can move forward. Because different certified readers can score the same film differently, defendants almost always obtain their own B-Read, and the credentials and reading history of your B Reader can become a focus of cross-examination. A B-Read is not a clinical diagnosis on its own; it is a classification of what appears on the film, which then must be combined with your exposure history, breathing tests, and sometimes a high-resolution CT scan to support a formal diagnosis.

Example Sentence

Her certified B Reader assigned a profusion rating of 1/1 with bilateral pleural plaques, which met the medical threshold required by both her state's filing statute and the relevant asbestos bankruptcy trust.

Related Terms

ILO Classification, Profusion Rating, Pleural Plaques, Asbestosis, Pneumoconiosis, High-Resolution CT Scan (HRCT), NIOSH

Notes

• Ask whether the physician who read your film holds current NIOSH B Reader certification (it must be renewed every four years by re-examination). Request a copy of the B-Read report and the certification number for your records.
• Preserve the actual imaging files (DICOM digital images or original films), not just the report. If your case is challenged, opposing experts and your own follow-up readers will need access to the underlying images.
• A B-Read alone is not a diagnosis. Ask your treating pulmonologist to correlate the B-Read with your exposure history, pulmonary function testing (FVC, DLCO), and HRCT imaging when appropriate.
• If you worked in shipyards, construction, power plants, refineries, insulation, or manufacturing and have never had a B-Read, ask your attorney or treating physician about arranging one. In some states the statute of limitations begins running when a radiographic abnormality is discovered.
• Be aware that defense experts often track high-volume B Readers; choosing a reader who is board-certified in radiology or pulmonology with an academic affiliation can help your reading withstand challenge.