X-ray fluorescence imaging (XFI) is a non-invasive technique enabling key applications such as pharmacokinetic studies and immune cell tracking. Labeling with medium to heavy elements enables detection by excitation with hard x-rays and subsequent measurement of emitted characteristic radiation. XFI provides high spatial resolution, high sensitivity and provides quantitative data. Special requirements need to be fulfilled by the x-ray detectors to reach a high sensitivity. These include high energy resolution, detection efficiency, large active area, and throughput, while minimizing noise from internal detectors effects. Here we discuss recent XFI applications in preclinical imaging and experiences with various detector types.
|