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Fig. 2 | Radiation Oncology

Fig. 2

From: Long-term survival of two patients with inoperable post-irradiation osteosarcoma treated with carbon-ion radiotherapy: a case report

Fig. 2

Radiological images before and after carbon-ion radiotherapy (C-ion RT) and dose distribution of Case 2. a Contrast-enhanced magnetic resonance imaging (MRI) before C-ion RT. The tumor (51 × 52 × 68 mm) was located in the sacral bone and had good contrast enhancement (red arrow). b 2-deoxy-2-[18F]fluoro-D-glucose-positron emission tomography (FDG-PET) before C-ion RT. The red arrow shows the tumor with abnormal FDG uptake. c Dose distribution on axial computed tomography images. The area within the red outline is the gross tumor volume of the osteosarcoma. The 95% (red), 90% (orange), 80% (yellow), 65% (green), 50% (blue), and 20% (purple) isodose curves are highlighted (100% was 70.4 Gy [relative biological effectiveness]). d FDG-PET 1 year after C-ion RT. FDG uptake was decreased compared with that before treatment (green arrow). e FDG-PET 7 years after C-ion RT. FDG uptake was decreased compared with that before treatment (green arrow)

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