A sua pesquisa - "((segmentation segmentation) or (recognition segmentation)) networks bidirectional a spinal~" - não corresponde a nenhum registo.

Talvez deva tentar algumas variações de ortografia:
segmentation segmentation » registration segmentation, detection segmentation, segmentation detection
recognition segmentation » region segmentation, registration segmentation, motion segmentation
networks bidirectional » networks directional, networks directing, networks fractional
bidirectional a » bidirectional _, bidirectional ant, bidirectional soa
a spinal » _ spinal, a spiral, 2 spinal

Pode obter mais resultados ajustando a pesquisa.