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Comparison of hardware arrangement within cross-sections of a 6-mm rigid endoscope with a multiport neuroendoscope. A conventional rod lens endoscope with a 2.8-mm scope channel can easily accommodate a 2.6-mm construct (1.6-mm LED and 1-mm chip-on-tip camera) of the multiport endoscope. The addition of a side port working channel with concurrent imaging tends to use up more of the crosssectional area.
