Methods, apparatus and systems for production, collection, handling, and imaging of tissue sections
Methods, apparatus and systems for collecting thin tissue samples for imaging. Thin tissue sections may be cut from tissue samples using a microtome-quality knife. In one example, tissue samples are mounted to a substrate that is rotated such that thin tissue sections are acquired via lathing. Collection of thin tissue sections may be facilitated by a conveyor belt. Thin tissue sections may be mounted to a thin substrate (e.g., by adhering thin tissue sections to a thin substrate via a roller mechanism) that may be imaged, for example, by an electron beam (e.g., in an electron microscope). Thin tissue sections may be strengthened before cutting via a blockface thinfilm deposition technique and/or a blockface taping technique. An automated reel-to-reel imaging technique may be employed for collected/mounted tissue sections to facilitate random-access imaging of tissue sections and maintaining a comprehensive library including a large volume of samples.
1. A system for processing a tissue sample, the system comprising:
a cutting portion including:
a cutting surface for contacting the tissue sample so as to liberate a thin tissue section that includes at least a portion of the tissue sample, and
a water bath constructed and arranged to contain water having a surface for supporting the thin tissue section; and
a collecting portion including:
a conductive support tape for collecting the thin tissue section from the surface of the water on to the support tape, wherein the support tape is adapted for electron microscopy, and
a conveyor device upon which the support tape is disposed for automatically guiding the support tape and the thin tissue section toward a collection region;
wherein the water disposed within the water bath provides a sole region of contact between the cutting portion and the collecting portion.
2. The system of claim 1 , wherein the collection region comprises a take-up reel for collecting the support tape and the thin tissue section.
3. The system of claim 1 , wherein the thin tissue section is less than 1micron in thickness.
4. The system of claim 3 , wherein the thin tissue section is between about 100nm and about 1micron in thickness.
5. The system of claim 1 , wherein the cutting surface comprises an ultramicrotome-quality knife.
6. The-system of claim 2 , wherein the take-up reel is circular.
7. The-system of claim 1 , wherein a surface of the support tape is adapted to support a plurality of thin tissue sections.
8. The system of claim 1 , wherein the conveyor device is constructed and arranged to automatically guide the support tape from a first location toward a second location.
9. The-system of claim 8 , wherein the second location is disposed at a higher position relative to the first location.
10. The system of claim 1 , wherein the support tape comprises metal.
11. The system of claim 1 , wherein the support tape is adapted to permit electrons to travel along a line between an upper region of the support tape and a lower region of the support tape.
12. The system of claim 11 , wherein the support tape includes holes that permit electrons to travel between the upper region and the lower region of the support tape.
13. The system of claim 1 , wherein upon placement of the support tape in a chamber of an electron microscope and upon subsequent bombardment of electrons on to the support tape, the electrons are permitted to travel freely along a surface of the support tape so that the support tape does not exhibit charging.