1. What is a Prostate Volume Calculator?

Definition: This calculator estimates prostate volume using the ellipsoid formula based on length, width, and height measurements from imaging studies.

Purpose: It helps radiologists and urologists assess prostate size for diagnostic and treatment planning purposes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Prostate volume (cubic centimeters)
• \( L \) — Length (cm)
• \( W \) — Width (cm)
• \( H \) — Height (cm)

Explanation: The formula approximates the prostate as an ellipsoid, with π/6 being the ellipsoid volume correction factor.

3. Importance of Prostate Volume Calculation

Details: Accurate volume measurement helps in diagnosing benign prostatic hyperplasia (BPH), planning surgical interventions, and assessing cancer risk.

4. Using the Calculator

Tips: Enter the maximum length, width, and height measurements from ultrasound, MRI, or CT imaging. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What imaging modalities can provide these measurements?
A: Transrectal ultrasound (TRUS), MRI, and CT scans can all provide the necessary measurements.

Q2: How accurate is this calculation?
A: The ellipsoid formula provides a good estimate (within 10-15% of actual volume) for most clinical purposes.

Q3: What's a normal prostate volume?
A: Typically 20-30 cm³ in young men, often increasing with age (may reach 40-60 cm³ in BPH).

Q4: How does this relate to PSA levels?
A: PSA density (PSA divided by volume) is often more clinically relevant than PSA alone.

Q5: Are there alternative calculation methods?
A: Yes, planimetry (tracing each slice) is more accurate but time-consuming, while this formula offers quick estimation.