TB rays, also known as Tuberculosis rays, are a form of X-ray imaging used in medical diagnostics. First adopted in the early 20th century to help detect pulmonary tuberculosis, they work by penetrating soft tissues to produce clear images of the lungs. Clinically, they are often used alongside standard radiographic views such as posteroanterior (PA) and lateral projections to improve diagnostic clarity.
Over time, their use has declined as more advanced imaging methods have become available, particularly computed tomography (CT) scans, which provide greater detail and sensitivity. The shift reflects broader changes in radiology, where newer technologies offer improved accuracy for detecting and monitoring lung disease. Despite reduced usage, TB rays remain an important part of medical imaging history, illustrating the progression from basic X-ray techniques to modern cross-sectional imaging used in contemporary healthcare.