Gonad dose in cineurethrocystography.

Area of Science:

• Radiology
• Medical Imaging
• Urology

Background:

• Cineurethrocystography is a diagnostic imaging technique.
• Accurate technical factors and radiation dose assessment are crucial for patient safety.

Purpose of the Study:

• To detail the technical factors for cineurethrocystography in the true lateral projection for females.
• To measure and report radiation doses to midline structures in females and gonads in males during this procedure.
• To compare these doses with existing literature and other common radiological examinations.

Main Methods:

• Radiation dose measurements using Lithium Fluoride thermoluminescent dosimeters (LiF TLD) inserted into the vagina for females.
• Utilizing a Rando phantom to estimate ovarian radiation dose.
• Measuring gonad dose in males with and without lead foil protection.
• Recording the number of cine frames exposed for each examination.

Main Results:

• Average midline radiation dose in 19 female examinations was 148 mrad (range: 50-306 mrad) with an average of 96 cine frames.
• Estimated average ovarian dose is 30% higher than midline dose due to proximity.
• Average male gonad dose with protection was 123 mrad (range: 56-243 mrad) over 107 cine frames.
• A single male patient without gonad protection received 1575 mrad for 112 cine frames.

Conclusions:

• The radiation doses recorded for cineurethrocystography in both sexes are within acceptable ranges.
• Results compare favorably with published data and doses from intravenous pyelogram (IVP) procedures.
• The study provides essential data for optimizing radiation safety in cineurethrocystography.