John Waddle and radiologist Steven A. Sirr MD have developed a unique expertise in using computed tomography — CT Scans — to visualize valuable bowed string instruments. The project began when Dr. Sirr brought his violin to work with him and, out of curiosity, ran it through a CT scanner.
Since then, he and John have obtained permission to scan many of the world's great violins and published their findings in scientific journals. As they have concluded:
- CT can provide the modern luthier and acoustic scientist with a unique tool for noninvasive evaluation of an instrument's structure, defects, and repair history and for accurate measurements of its wood thickness and density.
- CT derived information may aid luthiers in replicating the qualities of original masterpieces.
- CT evaluation may have an important role in the valuation, insurance, and identification of valuable stringed instruments.