Prostate Volume and Density Calculator

Prostate Volume and Density Formulas:

\[ V = \frac{\pi}{6} \times L \times W \times H \] \[ \rho = \frac{PSA}{V} \]

Length (L):

Width (W):

Height (H):

PSA:

ng/ml

Volume (V): cm³

Density (ρ): ng/ml/cm³

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1. What is a Prostate Volume and Density Calculator?

Definition: This calculator estimates prostate volume using ellipsoid formula and calculates PSA density from prostate-specific antigen levels.

Purpose: It helps medical professionals assess prostate health by combining size and PSA measurements into a clinically useful metric.

2. How Does the Calculator Work?

The calculator uses two formulas:

\[ V = \frac{\pi}{6} \times L \times W \times H \] \[ \rho = \frac{PSA}{V} \]

Where:

\( V \) — Prostate volume (cubic centimeters)
\( L \) — Length (centimeters)
\( W \) — Width (centimeters)
\( H \) — Height (centimeters)
\( \rho \) — PSA density (ng/ml/cm³)
\( PSA \) — Prostate-specific antigen (ng/ml)

Explanation: The prostate is modeled as an ellipsoid, and PSA density helps evaluate cancer risk relative to prostate size.

3. Importance of PSA Density

Details: PSA density improves cancer detection specificity by accounting for prostate size, with values >0.15 ng/ml/cm³ suggesting higher risk.

4. Using the Calculator

Tips: Enter prostate dimensions from ultrasound/imaging and current PSA level. All measurements must be in cm except PSA (ng/ml).

5. Frequently Asked Questions (FAQ)

Q1: Why use the ellipsoid formula?
A: It's the standard method for prostate volume estimation from ultrasound measurements, with good correlation to actual volume.

Q2: What's a normal prostate volume?
A: Typically 20-30 cm³ in young men, often enlarges with age (BPH) to 40+ cm³.

Q3: What PSA density is concerning?
A: Values >0.15 ng/ml/cm³ may warrant further investigation for prostate cancer.

Q4: How accurate is this calculation?
A: While useful clinically, actual prostate shape varies. MRI provides more precise volume measurements.

Q5: Can I use this for post-treatment monitoring?
A: Yes, tracking changes in volume and PSA density can help assess treatment response.