National Map of SPECT-CT Access Reveals Stark Geographic and Racial Disparities

A US geospatial analysis found highly unequal SPECT-CT access (Gini 0.327). Between-group inequality was significant by race and population (p≤0.004), not income or sex. Local racial impact varied widely: from -7.82 to +9.37 miles/% White, highlighting regional disparities.

• Geographically weighted regression vastly outperformed the global model (adjusted R² 0.984 vs 0.115), uncovering local reversals in racial impact.
• Within-group inequality was substantial, particularly among lower-White and high-population areas.

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