1. What is a Splenic Volume Calculator in Radiology?

Definition: This calculator estimates spleen volume based on length, width, and height measurements from radiological imaging.

Purpose: It helps radiologists and clinicians assess spleen size for diagnosing conditions like splenomegaly or monitoring treatment response.

2. How Does the Calculator Work?

The calculator uses the prolate ellipsoid formula:

Where:

• \( V \) — Volume of spleen (cm³)
• \( L \) — Maximum length (cm)
• \( W \) — Maximum width (cm)
• \( H \) — Maximum height (cm)

Explanation: This formula approximates the spleen as an ellipsoid shape, which is the standard method for volume estimation in radiology.

3. Importance of Splenic Volume Calculation

Details: Accurate volume measurement helps diagnose splenomegaly (normal range: 107-314 cm³ in adults), monitor disease progression, and assess treatment effectiveness.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What imaging modalities can be used?
A: CT and MRI are most common, but ultrasound measurements can also be used if all three dimensions are obtained.

Q2: How accurate is this formula?
A: It correlates well with actual volumes (r=0.97) though slightly underestimates true volume by about 5-10%.

Q3: What's considered a normal spleen volume?
A: Typically 107-314 cm³ in adults, but varies by body size. Splenomegaly is usually >400 cm³.

Q4: Why not use planimetry?
A: Planimetry is more accurate but time-consuming. This formula provides quick estimates suitable for clinical practice.

Q5: How do I measure the dimensions?
A: Measure maximum length in the sagittal plane, width in the axial plane, and height in the coronal plane.