PURPOSE: The purpose of this paper is to evaluate acute radiation-induced toxicity of carbon ion therapy. MATERIAL AND METHODS: From December 1997 to November 2000, 37 patients with chordomas and low-grade chondrosarcomas of the skull base have been treated with carbon ions at the heavy ion synchrotron (SIS) at GSI, Darmstadt. Tumor-conformal application of carbon beams was realized by intensity-controlled raster scanning in combination with pulse-to-pulse energy variation. The treatment planning procedure included a biological plan optimization. We applied a cobalt-Gray equivalent dose of 60GyE. Acute toxicity was assessed according to the common toxicity criteria (CTC). RESULTS: Acute toxicity included skin reactions ( degrees I+ degrees II) in four patients, mucositis ( degrees I- degrees III) in eight patients, otitis and middle ear effusion in four, sinusitis in four, nausea/weight loss in one and edema of the temporal lobes in one patient. In two patients, preexisting neurological symptoms worsened. We did not observe acute morbidity > degrees III of normal tissues. CONCLUSION: Scanning beam delivery of heavy charged particles is safe and reliable. No unexpected acute dose limiting toxicity was observed. With regard to toxicity, a substantial improvement compared to passive beam shaping technology is achieved.
PURPOSE: The purpose of this paper is to evaluate acute radiation-induced toxicity of carbon ion therapy. MATERIAL AND METHODS: From December 1997 to November 2000, 37 patients with chordomas and low-grade chondrosarcomas of the skull base have been treated with carbon ions at the heavy ion synchrotron (SIS) at GSI, Darmstadt. Tumor-conformal application of carbon beams was realized by intensity-controlled raster scanning in combination with pulse-to-pulse energy variation. The treatment planning procedure included a biological plan optimization. We applied a cobalt-Gray equivalent dose of 60GyE. Acute toxicity was assessed according to the common toxicity criteria (CTC). RESULTS: Acute toxicity included skin reactions ( degrees I+ degrees II) in four patients, mucositis ( degrees I- degrees III) in eight patients, otitis and middle ear effusion in four, sinusitis in four, nausea/weight loss in one and edema of the temporal lobes in one patient. In two patients, preexisting neurological symptoms worsened. We did not observe acute morbidity > degrees III of normal tissues. CONCLUSION: Scanning beam delivery of heavy charged particles is safe and reliable. No unexpected acute dose limiting toxicity was observed. With regard to toxicity, a substantial improvement compared to passive beam shaping technology is achieved.
Authors: Osama Mohamad; Brock J Sishc; Janapriya Saha; Arnold Pompos; Asal Rahimi; Michael D Story; Anthony J Davis; D W Nathan Kim Journal: Cancers (Basel) Date: 2017-06-09 Impact factor: 6.639