[Three-dimensional display of the prostate based on transrectal ultrasonogram]

Area of Science:

• Medical Imaging
• Urology
• Software Development

Background:

• Accurate prostate contour and weight estimation are crucial for diagnosis and treatment.
• Traditional methods like assuming an ellipsoidal shape can underestimate prostate weight, especially in normal cases.

Purpose of the Study:

• To develop and evaluate the clinical usefulness of a novel software for three-dimensional (3D) prostatic contour display.
• To assess the accuracy of 3D contour analysis in differentiating prostate conditions and estimating weight.

Main Methods:

• Development of a laptop computer software utilizing transrectal ultrasonograms for 3D prostatic contour reconstruction.
• Analysis of characteristic prostatic shapes in cases of prostate cancer, benign prostatic hypertrophy, and normal prostates.
• Evaluation of 3D contour display in monitoring weight changes during anti-androgen therapy for benign prostatic hypertrophy.

Main Results:

• Distinct 3D prostatic contours were observed for cancer (irregular), hypertrophy (smooth spherical), and normal (flat) cases.
• Ellipsoidal estimation of prostate weight was found to underestimate actual weights, particularly in normal cases.
• The 3D display effectively visualized localized regrowth in nine benign prostatic hypertrophy patients experiencing transient weight reduction during therapy.

Conclusions:

• The developed software provides a clinically useful tool for visualizing 3D prostatic contours.
• 3D display aids in differentiating prostate conditions and offers a more accurate assessment than simple ellipsoidal approximations.
• This technology is valuable for monitoring treatment response, especially in cases of dynamic prostate size changes.