1. What is the Normal Value Radiology Assistant?

Definition: This calculator estimates organ volumes using the ellipsoid formula commonly used in radiology measurements.

Purpose: It helps radiologists and medical professionals estimate normal organ volumes for diagnostic and research purposes.

2. How Does the Calculator Work?

The calculator uses the ellipsoid formula:

Where:

• \( V \) — Volume of organ (cubic centimeters)
• \( L \) — Length measurement (cm)
• \( W \) — Width measurement (cm)
• \( H \) — Height measurement (cm)

Explanation: The formula approximates organ volume by treating it as an ellipsoid shape, which is a common approximation in radiology.

3. Importance of Organ Volume Calculation

Details: Accurate volume estimation helps in assessing organomegaly, tumor size, treatment response, and pre-transplant evaluations.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Which organs can this calculator be used for?
A: It's commonly used for liver, spleen, kidneys, thyroid, and other solid organs that approximate ellipsoid shapes.

Q2: How accurate is the ellipsoid formula?
A: It provides a good estimate (within 10-15% of actual volume) for regularly shaped organs, but may be less accurate for irregular shapes.

Q3: Should measurements be in any particular plane?
A: Typically length is longest dimension, width is perpendicular to length, and height is the third orthogonal dimension.

Q4: What are typical volume ranges for common organs?
A: Liver ~1200-1500 cm³, spleen ~150-200 cm³, kidney ~110-150 cm³ (varies by size and gender).

Q5: Can this be used for tumor volume calculation?
A: Yes, the same formula is often used for measuring tumor volumes in treatment response assessments.