Abstract: Metrological traceability of time-related parameters during the exposure process is required in the research, production, and quality control of medical diagnostic X-ray radiation sources. Appropriate methods for value dissemination should be established to meet these measurement requirements. Through comprehensive research on relevant national standards, international standards, and various industry specifications, this paper evaluates and analyzes the current definitions, measurement methods, and value dissemination approaches for exposure time, irradiation time, and loading time. The relationships between these time quantities are clarified, and the necessity of establishing a time quantity dissemination system is demonstrated. Based on newly revised national and international standards, a value dissemination method for irradiation time was designed, achieving independent traceability of irradiation time and loading time in principle. Analysis of measurement results and uncertainty indicates that the method of value dissemination based on loading time and the method based on irradiation time cannot substitute for each other.