Figure 1
From: Spinal radiosurgery - efficacy and safety after prior conventional radiotherapy
3-D planning in a patient with osseous metastasis in the lumbar vertebral body 5. PTV for conventional radiotherapy (Figure 1a) included L4-L1 (→ = encompassing 95%-isodose). Below (Figure 1b) salvage SRS planning in the same patient at lumbar vertebral body 5 after conventional radiotherapy (green: 70%-isodose, yellow: 60%/50%/40%-isodose, white: 30%/20%-isodose). Abbreviation: SRS = spinal radiosurgery.