1. What is Radiology Assistant Normal Values Ultrasound?

Definition: This calculator estimates normal organ volumes using ultrasound measurements based on the ellipsoid formula.

Purpose: It helps radiologists and medical professionals determine expected organ volumes for comparison with patient measurements.

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 commonly used in ultrasound measurements.

3. Importance of Organ Volume Calculation

Details: Accurate volume estimation helps in assessing organomegaly, atrophy, or normal growth patterns, and is particularly useful in liver, kidney, and thyroid evaluations.

4. Using the Calculator

Tips: Enter the length, width, and height measurements in centimeters from ultrasound imaging. 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, kidneys, spleen, thyroid, and other solid organs measured by ultrasound.

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: What are typical normal values for common organs?
A: Liver: 1200-1500 cm³, Kidney: 110-150 cm³ (adult), Spleen: 150-200 cm³, Thyroid: 10-18 cm³.

Q4: Should measurements be taken in specific planes?
A: Yes, length is typically sagittal, width is transverse, and height is coronal for consistency.

Q5: How does this compare to volumetric CT measurements?
A: Ultrasound measurements are generally smaller due to technical factors, but correlate well for clinical purposes.