What is the recommended source-to-image distance (SID) for a medial oblique radiograph of the fifth digit of the foot?

For a medial oblique radiograph of the fifth digit of the foot, the recommended source-to-image distance (SID) is typically 40 inches. This distance strikes a balance between image resolution and patient safety, as a closer SID can increase radiation dose while a further distance might compromise image quality.

Using a 40-inch SID in this context helps to reduce magnification and distortion, which is particularly important when imaging small structures such as the digits of the foot. This distance allows for optimal exposure and detail, resulting in clear images that aid in accurate diagnosis and assessment. Proper SID is crucial to ensure that the anatomical relationships are well represented in the radiologic field, which is especially important in extremities such as the foot.

In this case, the emphasis on using a specific SID illustrates the importance of standardized protocols in radiographic practices to ensure the quality of images while minimizing risk to patients.