What is the effect of using lower kVp settings on radiographic images?

Using lower kilovolt peak (kVp) settings in radiographic imaging primarily impacts the contrast of the resulting images. Lower kVp settings result in images with higher contrast, which means there is a greater difference between the light and dark areas of the radiograph. This is particularly useful in dental imaging where distinguishing between different tissues can be crucial for diagnosis.

However, while lower kVp enhances image contrast, it is essential to note that it can also lead to an increase in patient dose. This occurs because lower kVp settings increase the exposure time required to achieve adequate image quality, which can result in a higher cumulative exposure to radiation for the patient. Therefore, while higher contrast may be desirable, it is a trade-off with increased radiation exposure.

In contrast, lower contrast images produced by higher kVp settings would require less exposure time and result in a lower patient dose, but they may not offer the same level of detail needed for accurate diagnostics. The objective in dental radiography is to find a balance between achieving the necessary image quality and minimizing radiation exposure, thus making the choice of kVp critically important in practice.