Magnetic Field–Based Dose Modulation in Diagnostic Radiology: A Feasibility Study

This study evaluated whether a static magnetic field can modulate the electron-associated component of dose during diagnostic electromagnetic photon beam exposures. Doses were measured with a solid-state dosimeter at 60–110 kVp (10-kVp steps) on an X-ray radiation gene rator operated at 200 mA, 100 cm source-to-detector distance, 1.0 s, and 20 × 20 cm field. For each kVp, 20 repeated measurements were acquired under two conditions: no field versus a transverse ~0.5 T field generated by Nd magnets; output reproducibility was verified (all CV ≤ 0.05). With the field applied, doses were consistently but slightly lower at 60–90 kVp (all two- sided P > 0.05). Statistically significant reductions appeared at higher kVp: 100 kVp, 21.325 ± 0.155 vs 21.245 ± 0.076 mGy (P = 0.048); 110 kVp, 24.970 ± 0.108 vs 24.910 ± 0.072 mGy (P = 0.047). These findings support the feasibility of magnetic-field–induced dose modulation under diagnostic-energy conditions.