Normal Ovarian Volume Radiology

Ovarian Volume Formula:

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

Ovarian Volume (cm³):

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1. What is Ovarian Volume Calculation?

Definition: This calculator estimates normal ovarian volume using the ellipsoid formula based on three orthogonal measurements.

Purpose: It helps radiologists and gynecologists assess ovarian size, which is important for evaluating various gynecological conditions.

2. How Does the Calculator Work?

The calculator uses the prolate ellipsoid formula:

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

Where:

\( V \) — Ovarian volume (cm³)
\( L \) — Maximum longitudinal diameter (cm)
\( W \) — Maximum transverse diameter (cm)
\( H \) — Maximum anteroposterior diameter (cm)

Explanation: The formula approximates the ovary as an ellipsoid and calculates its volume using three perpendicular measurements.

3. Importance of Ovarian Volume Measurement

Details: Normal ovarian volume varies with age and menstrual status. Typical range is 5-15 cm³ in premenopausal women. Increased volume may indicate PCOS, cysts, or tumors.

4. Using the Calculator

Tips: Enter the three orthogonal measurements (length, width, height) in centimeters from ultrasound or MRI images. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the normal ovarian volume range?
A: Premenopausal women: 5-15 cm³; Postmenopausal women: typically <5 cm³.

Q2: Why use the ellipsoid formula?
A: It's the standard method in radiology as it approximates ovarian shape and is reproducible.

Q3: When is ovarian volume considered abnormal?
A: Volume >10 cm³ in premenopausal or >5 cm³ in postmenopausal women may warrant further evaluation.

Q4: How accurate is this calculation?
A: It provides a good estimate, though actual ovarian shape may vary from perfect ellipsoid.

Q5: Can this be used for polycystic ovaries?
A: Yes, PCOS diagnosis often includes ovarian volume >10 cm³ (with other criteria).