X-Ray Simulator: Beam Divergence and Field Size

Focal Spot Size (mm):

Divergence Angle (°):

Maximum Distance (m):

Number of Rays:

Source (0m)

∞ (parallel)

X-rays emerge from the tube's focal spot with fixed angular divergence:

θ = 2 × arctan(target size / source-target distance)

The field size at any distance (L) is calculated by:

D = D₀ + 2 × L × tan(θ/2)

Where:

☢️ X-Ray Simulator: Beam Divergence and Field Size