Normal Prostate Size CT Scan

Prostate Volume Formula:

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

Prostate Volume (cm³):

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1. What is Prostate Volume Calculation?

Definition: This calculator estimates prostate volume using CT scan measurements based on the ellipsoid formula.

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

2. How Does the Calculator Work?

The calculator uses the ellipsoid formula:

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

Where:

\( V \) — Prostate volume (cm³)
\( L \) — Length (cm)
\( W \) — Width (cm)
\( H \) — Height (cm)

Explanation: The prostate is modeled as an ellipsoid, and the formula calculates its volume based on three orthogonal measurements.

3. Importance of Prostate Volume Measurement

Details: Prostate volume assessment helps in diagnosing BPH (benign prostatic hyperplasia), planning surgical procedures, and evaluating prostate cancer risk.

4. Using the Calculator

Tips: Enter the maximum length, width, and height measurements from CT scan in centimeters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal prostate volume?
A: Typically 20-30 cm³ in young men, may increase to 30-50 cm³ with age due to BPH.

Q2: How accurate is this method?
A: The ellipsoid formula provides a good estimate (within 10-15% of actual volume) when proper measurements are taken.

Q3: Should measurements be taken in axial or sagittal plane?
A: Width is typically axial, length is sagittal, and height is coronal or axial, depending on prostate orientation.

Q4: How does this compare to TRUS measurements?
A: CT measurements may slightly differ from transrectal ultrasound (TRUS) but are generally comparable.

Q5: When is prostate volume clinically important?
A: Important for PSA density calculation, surgical planning, and monitoring BPH progression.