Figure 1From: The safety and usefulness of neutron brachytherapy and external beam radiation in the treatment of patients with gastroesophageal junction adenocarcinoma with or without chemotherapyAn X-ray image was taken while the applicator and the source were both inserted into the esophagus of a patient. The water balloon can clearly be seen as it is filled with an X-ray contrast agent. The dose was prescribed to the reference point, which was located 10 mm from the center point of the source capsule in the transverse direction. From the first to fourth NBT, the shape of the tumor can be clearly identified.Back to article page