1. What is Normal Prostate Volume?

Definition: This calculator estimates prostate volume using the ellipsoid formula, which is commonly used in radiology and urology.

Purpose: It helps clinicians assess prostate size for diagnostic purposes, treatment planning, and monitoring of prostate conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Volume of prostate (cm³)
• \( L \) — Length (cm)
• \( W \) — Width (cm)
• \( H \) — Height (cm)

Explanation: The formula approximates the prostate as an ellipsoid shape, which is a standard method in clinical practice.

3. Importance of Prostate Volume Measurement

Details: Prostate volume assessment is crucial for:

• Diagnosing benign prostatic hyperplasia (BPH)
• Planning prostate cancer treatments
• Calculating PSA density (PSA divided by volume)
• Monitoring prostate growth over time

4. Using the Calculator

Tips: Enter the three orthogonal measurements (length, width, height) typically obtained from TRUS (transrectal ultrasound) or MRI. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal prostate volume?
A: Typically 20-30 cm³ in young adults, may increase with age (up to 40-50 cm³ in older men with BPH).

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

Q3: What's the difference between volume and weight?
A: Prostate weight (grams) is approximately equal to volume (cm³) multiplied by 1.05 (specific gravity of prostate tissue).

Q4: When would prostate volume be important?
A: Important for assessing BPH symptoms, planning surgical procedures, and evaluating prostate cancer risk.

Q5: What imaging methods can provide these measurements?
A: TRUS (most common), MRI, and CT scans can all provide the necessary measurements.