Fernández Álvarez-Estrada, RamónCalvo Padilla, María Luisa2023-06-202023-06-202004-110969-804310.1016/j.apradiso.2004.05.039https://hdl.handle.net/20.500.14352/51054© 2004 Elsevier Ltd. World Congress on Neutron Capture Therapy (11º. 2004. Boston, EE.UU.). Both authors acknowledge the financial support of Ministerio de Ciencia y Tecnología, Spain: R.F. A.-E. through Proyecto FPA2000-0956, while M.L.C. through Proyecto TIC2002-1846. We are grateful to Dr. J.F. Crawford for interesting correspondence, Mrs. Reiko Matsuoka for providing kindly information about the activities of the NCT community and to the referees for comments and criticism. R.F. A.-E. is Associate Member of Instituto de Biocomp. y Física de Sist. Compl., Universidad de Zaragoza, Zaragoza, Spain.We summarize previous researches regarding neutron guides of small transverse cross-section (neutron fibres), smaller than those of the standard hollow guides and collimators employed currently. Those studies may not be widely known in the neutron capture therapy (NCT) community, but they may be interesting for it. Such neutron fibres could allow to deliver and concentrate neutron beams selectively in regions of size smaller than 1 mm. We present new estimates and point out and discuss some new possible specific applications of those neutron fibres, which would not replace standard NCT but could supplement it. Thus, we entertain the possibility that neutron fibres could be useful for additional therapies (in typical NCT durations) of: (i) rather small tumours, (ii) thin borders of tumours. The use of these neutron fibres could reduce the undesirable delivery of radiation to healthy tissue around regions with malignant tissue.engjournal articlehttp://dx.doi.org/10.1016/j.apradiso.2004.05.039http://www.sciencedirect.comopen access535Bending LossesOpticsÓptica (Física)2209.19 Óptica Física