X-ray photometry refers to the measurement of X-ray radiation in a specific area. It is used in a variety of fields, including astronomy, medical imaging, and materials science. While "X-ray photometry" is the most commonly used term for this kind of measurement, there are a few other phrases that can be used interchangeably to describe the same process. These include "X-ray spectrometry," which refers specifically to the measurement of X-ray spectra, and "X-ray fluorescence analysis," which involves the study of emissions from excited atoms. Other related terms include "X-ray diffraction," "X-ray crystallography," and "X-ray tomography." Regardless of the specific term used, X-ray photometry is a vital tool in many scientific disciplines.