Computed tomography for iodine contrast media detection using energy information measured by a current-mode detector

Abstract

To exploit the energy information of x-rays in computed tomography (CT), we developed a current-mode detector that gave the energy distribution of the incident x-rays. The CT value obtained for a given material in a phantom depended on the x-ray path length through the phantom. To ensure a constant CT value for a given material, we prepared response functions as a function of the x-rays path length and applied these response functions in the unfolding process. When using response functions that depended on the x-ray path length, the CT values obtained were constant for a given material. In addition, the CT values obtained for iodine contrast media were greater than the values obtained using conventional current CT, especially for higher x-ray tube voltages.

Simulation Study on the Feasibility of Current-mode SPECT for B-10 Concentration Estimation in Boron Neutron Capture Therapy

“…For overcoming high rate background gamma rays and obtaining 10 B concentration image, we have been studying the feasibility of current-mode SPECT with applying the principle of a transXend detector, which we have invented for energy-resolved X-ray computed tomography [7][8][9][10][11][12]. In this method, all the gamma rays are measured as electric current.…”