1：Experimental Design and Method Selection:

A radiological phantom (Rando) in the upright position was exposed to radiation from a Planmeca Intra X-ray unit over 9 exposure geometries (right side of a full mouth series). Scattered radiation doses were measured at 5 locations in the horizontal plane and 4 locations in the vertical plane, corrected for background and leakage radiation. Weightings based on workload distribution from a retrospective evaluation were applied to construct a representative scattered radiation pattern.

2：Sample Selection and Data Sources:

A Rando radiological phantom was used. Data on exposure frequencies and times were obtained from a retrospective evaluation of intraoral X-rays performed at the institution over a 2-month period.

3：List of Experimental Equipment and Materials:

Planmeca Intra X-ray unit, rectangular collimator (37 × 30 mm), semiconductor dosemeter (Unfors Raysafe ThinX), semiconductor survey detector (Unfors Xi Survey Detector), Rando phantom.

4：Experimental Procedures and Operational Workflow:

The phantom was exposed in 9 geometries with specific exposure parameters (70 kV, 8 mA, 3.2 s). Measurements were taken at specified positions, corrected for background and leakage radiation, and normalized to per mAs at 1 m distance using the inverse square law.

5：2 s). Measurements were taken at specified positions, corrected for background and leakage radiation, and normalized to per mAs at 1 m distance using the inverse square law. Data Analysis Methods:

5. Data Analysis Methods: Weighted additions of scattered radiation doses based on workload contributions were performed. The highest value in the pattern was used to derive the conversion factor, converted from Gy to Sv using a literature-based factor.