In million-volt radiography, how does filtration at the tube impact radiographic quality?

In million-volt radiography, the role of filtration at the X-ray tube is primarily to enhance the quality of the X-ray beam while simultaneously protecting patients and personnel from unnecessary exposure to lower-energy photons that do not contribute to image formation.

Filtration effectively removes these low-energy X-rays that would otherwise increase the radiation dose without improving image quality. By filtering out these less penetrating rays, the remaining higher-energy X-rays that penetrate the subject matter more effectively reach the detector or film, thus improving the overall diagnostic quality of the radiographic image.

This process does not mean that filtration offers no improvement to the radiographic quality. In fact, it can significantly improve the contrast of the image and reduce the likelihood of image artifacts caused by scatter radiation. Therefore, the assertion that filtration offers no improvement in radiographic quality does not accurately reflect the benefits filtering provides in the context of million-volt radiography.