For the Waters method, nasal bones, the distance from the tip of the nose to the IR is:

For the Waters method, nasal bones, the distance from the tip of the nose to the IR is:

• A. 1 inch
• B. .75 inch (2 cm)
• C. 0.5 inch
• D. 1.5 inch

Answer: (B)

In this view, the distance from the tip of the nose to the image receptor is chosen to place the nasal bones clearly in the beam while keeping distortion minimal. For the Waters technique, a small offset of about 2 cm (roughly 0.75 inch) between the nasal tip and the receptor helps the nasal bones appear without excessive magnification or superimposition by soft tissues. If the nose were much closer to the receptor, the bones could become distorted or blurred due to proximity; if it were much farther away, the nasal bones might not be captured at the right size or could be partially out of the field. So the standard distance is about 2 cm, which provides a good balance for accurate visualization of the nasal bones.

In this view, the distance from the tip of the nose to the image receptor is chosen to place the nasal bones clearly in the beam while keeping distortion minimal. For the Waters technique, a small offset of about 2 cm (roughly 0.75 inch) between the nasal tip and the receptor helps the nasal bones appear without excessive magnification or superimposition by soft tissues. If the nose were much closer to the receptor, the bones could become distorted or blurred due to proximity; if it were much farther away, the nasal bones might not be captured at the right size or could be partially out of the field. So the standard distance is about 2 cm, which provides a good balance for accurate visualization of the nasal bones.