title: Lung cancer: a 6-field technique using lateral beams in conformal radiotherapy for bilateral supraclavicular lymph node metastases.
abstract: A 6-field technique using lateral beams in conformal radiotherapy was developed for patients with bilateral supraclavicular lymph node metastasis of lung cancer. The possibility of using this technique in practice was evaluated. Six fields with the same isocenter point (IP) were arranged. Two fields using anterior-posterior opposed beams involved all of the planning target volume (PTV). The next 2 fields using off-cord oblique beams involved the PTV inferior to the IP. The remaining 2 fields using lateral opposed beams, that shielded the spinal cord, involved the PTV superior to the IP. The oblique 2 fields and lateral 2 fields were connected using a half-beam technique. In 6 patients with non-small-cell lung cancer (NSCLC, n = 4) or small-cell lung cancer (SCLC, n = 2), treatment re-planning based on this technique was performed. This technique was applicable in 4 patients with NSCLC, in whom the general criteria of radiotherapy for lung cancer were met. In 2 patients with SCLC, the cumulative volume of lung that received more than 20 Gy exceeded 37% of the total lung volume. This technique was usable in 67% of the patients and was not necessarily contraindicated in the other 33%.
authors: Department of Radiation Oncology, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno-ku Osaka, 5458585 Japan.
authors: Shinichi
authors: S
authors: Tsutsumi
authors: Department of Radiology, Izumi Municipal Hospital, 4-10-10, Fuchucho, Izumi, 5940071 Japan.
authors: Takuhito
authors: T
authors: Tada
authors: Department of Radiology, JCHO Osaka Hospital, 4-2-78, Fukushima, Fukushima-ku, Osaka, 5530003 Japan.
authors: Tomoko
authors: T
authors: Maekado
authors: Department of Radiology, Izumi Municipal Hospital, 4-10-10, Fuchucho, Izumi, 5940071 Japan.
authors: Masahiro
authors: M
authors: Tokunaga
authors: Department of Radiology, Izumi Municipal Hospital, 4-10-10, Fuchucho, Izumi, 5940071 Japan.
authors: Noriko
authors: N
authors: Tanaka
authors: Department of Radiology, Izumi Municipal Hospital, 4-10-10, Fuchucho, Izumi, 5940071 Japan.
authors: Ai
authors: A
authors: Kobayashi
authors: Department of Radiation Oncology, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno-ku Osaka, 5458585 Japan.
authors: Eiichiro
authors: E
authors: Okazaki
authors: Department of Radiation Oncology, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno-ku Osaka, 5458585 Japan.
authors: Shougo
authors: S
authors: Matsuda
authors: Department of Radiation Oncology, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno-ku Osaka, 5458585 Japan.
authors: Masako N
authors: MN
authors: Hosono
authors: Department of Radiation Oncology, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno-ku Osaka, 5458585 Japan.
authors: Yukio
authors: Y
authors: Miki
keywords: Conformal radiotherapy; Lung cancer; Supraclavicular lymph node metastasis