Figure 3.

Stereotactic body radiation therapy (SBRT) plans considering ⁹⁰Y selective internal radiation therapy (SIRT) for patients 9 and 10. Liver (blue), tumor 1 (magenta), tumor 2 (cyan, patient 10 only), and dose-constraining 7 Gy equivalent dose (EQD) isodose (orange, corresponding to ≈40 Gy to normal liver from ⁹⁰Y SIRT) contours were used for SBRT planning. The left column illustrates the ⁹⁰Y SIRT EQD derived from radiobiological modeling. The center column represents the SBRT plan with a single planning target volume (PTV) of the collective tumor contours. The right column shows the accumulated doses of the left and center columns.