Fig. 2
From: Oral mucosal melanoma treated with carbon ion radiotherapy: a case report
Dose distribution of carbon ion radiotherapy. Treatment plan for the oral mucosal melanoma. The gross tumor volume is shown in red. We used a shrinking field around clinical target volume 1 and clinical target volume 2. Clinical target volume 1 is shown by the gray line on the anterior plan. Clinical target volume 2 is shown by the cyan line on the posterior plan. An isovalues line of 95 % is shown by the red line and almost covers the clinical target volume. CTV clinical target volume, GTV gross tumor volume