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Add probe/shank length as a field of the table #4
Description
The probe/shank length is not available as a field on the library:
https://github.com/billkarsh/ProbeTable/blob/main/Tables/probe_features.json
But I see on the sheets where I can see that is 10mm for most probes save for the non-human primate ones:
image from the sheet:
https://1d1204a4-e092-4bd5-ab7d-6d350a74299f.filesusr.com/ugd/328966_4228a68261964794ad55f98d80ac3f45.pdf
Is there a way to officially calculate it from the available fields?
If not, could this be added as a new field>
We are dealing with this issue here in case that's useful
SpikeInterface/probeinterface#388
Activity
billkarsh commentedon Dec 18, 2025
The length between the tip and the top edge of the farthest electrode from the tip = tip_length_um + electrode_pitch_vert_um * (rows_per_shank - 1) + (electrode_size_vert_direction_um / 2).
Those data are in the table now. Does that meet your need?
billkarsh commentedon Dec 19, 2025
Posted v1.5. The new field, shank_tip_to_base_um has nominal values (good to <.5mm) which are hopefully close enough for visualization. This level of precision does not need to involve the imec engineers to obtain.
BTW, it remains true that the region of active sites is defined as starting at tip_length_um. From there it extends upward spanning: electrode_pitch_vert_um * (rows_per_shank - 1) + (electrode_size_vert_direction_um / 2). The region from there to the end of shank_tip_to_base_um (to the base edge) has no addressable sites.
Note that detailed modeling, say, to calculate probe collisions in a very crowded insertion plan, or to design fixturing, would be better served by CAD files than by innumerable table entries.