Applications of Filtered Bremsstrahlung Spectra in Radiographic Studies Part II: Measurements of Iodine in Tissue and Separation of Bone and Water

Filtered Bremsstrahlung spectra with energies just above and below the iodine K-edge were used to measure iodine as a contrast agent in radiologic studies. The properties of the spectra were first analyzed using a Ge(Li) detector. Based on this data, a technique for measuring iodine in the presence of both bone and water by only two measurements was studied. The results were confirmed in experiments using radiographic film as the detector. In addition, using suitable filters, separation of bone and water was achieved with film as the recorder. Noise and future applications of the film-screen system are considered.