Accuracy of prostate volume measurements using transrectal multiplanar three-dimensional sonography

Area of Science:

• Urology
• Medical Imaging
• Diagnostic Ultrasound

Background:

• Accurate prostate volume estimation is crucial for diagnosing and managing benign prostate hypertrophy (BPH) and prostate cancer.
• Conventional bidimensional (2D) sonography has limitations in precision for prostatic calculations.
• Three-dimensional (3D) ultrasound technology offers potential for improved volumetric accuracy.

Purpose of the Study:

• To compare the accuracy of 3D ultrasound with conventional 2D sonography for prostate volume measurements.
• To assess the clinical utility of 3D ultrasound in prostatic calculations.

Main Methods:

• A prospective study involving 80 patients (aged 63-74 years) with BPH or prostate cancer.
• Prostate volumes were measured using both 3D ultrasound (Kretztechnik Voluson 530D, 7.5 MHz transducer) and 2D sonography.
• Error margins and ranges were calculated for both imaging modalities.

Main Results:

• 3D ultrasound demonstrated a significantly lower mean absolute error (+/-0.2-3 mL, range 6.5%) compared to 2D sonography (+/-0.4-5 mL, range 35%).
• Both methods' accuracy was influenced by factors such as the presence of a third prostatic lobe, gland morphology, and size.
• 3D ultrasound provides a more precise estimation of prostate volumes.

Conclusions:

• 3D ultrasound is a more accurate method for prostate volume calculation than 2D sonography.
• Improved accuracy can enhance the evaluation of therapies targeting prostate volume reduction, particularly for BPH.
• 3D ultrasound offers significant clinical value with minimal additional cost.