Triple-energy virtual monochromatic imaging with a photon-counting detector for reducing metal artifacts in half-beam dental computed tomography

Abstract

Dental computed tomography (DCT) is crucial for accurate diagnosis and treatment planning in modern dental care. However, the presence of metal artifacts from dental restorations or implants often compromises the image quality. This study introduces and evaluates a novel technique, triple-energy virtual monochromatic imaging (TEVM), which employs a photon-counting detector (PCD) to enhance image quality. TEVM synthesizes images captured at three distinct energy levels to produce a virtual monochromatic image (VMI) with improved contrast and sharpness, particularly in areas affected by metal artifacts. We compared the efficacy of TEVM in mitigating metal artifacts using half-beam dental and endodontic CT with that of conventional methods. The results indicate that TEVM significantly reduces metal artifacts and improves image quality. In addition, this technique minimizes the need for repeated scans, thereby reducing radiation exposure. In conclusion, TEVM combined with PCD offers a promising avenue for overcoming the challenges posed by metal artifacts in dental and endodontic CT, thereby enhancing both diagnostic accuracy and patient care.