Image analysis and measurement of biological samples
Methods, devices, apparatus, and systems are provided for image analysis. Methods of image analysis may include observation, measurement, and analysis of images of biological and other samples; devices, apparatus, and systems provided herein are useful for observation, measurement, and analysis of images of such samples. The methods, devices, apparatus, and systems disclosed herein provide advantages over other methods, devices, apparatus, and systems.
1. A system for analyzing a sample, the system comprising:
a single dark field illumination source;
a detector;
an objective lens with an aperture;
a sample holder comprising a cover, a base having a first side and a second side, and a sample chamber wherein the dark field illumination source and the detector are both located on the same side of the sample holder, wherein the dark field illumination source is positioned so that light from the dark field illumination source to the sample holder is directed only at an oblique angle with respect to the base,
wherein said sample holder is shaped to provide a plurality of light paths, said plurality of light paths including both a direct light path comprising encountering the sample chamber before encountering an outer surface of the cover and an indirect light path comprising a point of internal reflection within the sample holder before encountering the sample chamber, effective that said light from the illumination source simultaneously provides both epi-illumination and trans-illumination to the sample chamber sufficient for dark field microscopy, wherein the aperture of the objective passes only scattered light from the sample to the detector sufficient for dark field microscopy.
2. The system of claim 1 , wherein the cover has an exterior surface coated with an optically absorbent material.
3. The system of claim 2 , wherein said indirect light path comprising a point of internal reflection within the sample holder comprises at least one point of total internal reflection of light within the sample holder.
4. The system of claim 1 , wherein the cover has an exterior surface coated with an optically absorbent ink.
5. The system of claim 1 , wherein said indirect light path comprising a point of internal reflection within the sample holder comprises at least one point of total internal reflection of light at a surface of the sample holder cover.
6. The system of claim 1 , wherein the sample holder comprises two or more sample chambers for holding sample.
7. The system of claim 1 , wherein the sample holder has a rectangular, cross-sectional shape.
8. The system of claim 1 , wherein the sample holder has a circular horizontal, cross-sectional shape.
9. The system of claim 1 , wherein the sample holder has a saw tooth vertical cross-sectional shape.
10. The system of claim 1 , wherein the sample holder has a step-shaped vertical cross-sectional shape.
11. The system of claim 1 , wherein said sample holder is movable relative to said illumination source to a plurality of locations, wherein said optically transmissive surface of the sample holder may be illuminated by the illumination source at each of said locations.
12. The system of claim 1 , wherein said dark field illumination source comprises a ringlight.
13. The system of claim 12 , wherein said ringlight is selected from the group consisting of a light emitting diode (LED)-based ringlight and a laser-based ringlight.
14. The system of claim 1 , further comprising a support structure comprising an optically transmissive surface shaped to engage an optically transmissive surface of the sample holder.
15. The system of claim 1 , further comprising a compression device configured to retain the sample holder in a desired location for illumination by the dark field illumination source.
16. The system of claim 1 , wherein said sample holder comprises a channel configured to contain at least a portion of the sample, and wherein the detector is configured to image at least a portion of said channel in the sample holder.
17. The system of claim 16 , wherein said channel comprises an elongated channel configured to contain at least a portion of the sample, said elongated channel having a length, and wherein said detector is configured to image the entire length of the elongated channel in the sample holder.
18. The system of claim 17 , wherein said elongated channel of the sample holder is sized and configured to hold the sample in a static, non-flowing manner effective that the sample remains separate from said detector.
19. The system of claim 18 , wherein the sample holder comprises a first fluid circuit sized and configured to hold one portion of the sample in a static, non-flowing manner and the sample holder comprises a second fluid circuit sized and configured to hold another portion of the sample in a flowing manner.
20. The system of claim 16 , wherein said dark field illumination source is movable relative to the sample holder.
21. The system of claim 16 , wherein said sample holder further comprises a fluid circuit fully confined in the sample holder, and wherein the sample is located in said fluid circuit, effective that the sample remains separate from said detector.
22. The system of claim 21 , wherein said sample holder is movable relative to the detector.
23. The system of claim 21 , wherein said detector is movable relative to the sample holder.
24. The system of claim 1 , wherein the sample holder comprises a fluid circuit sized and configured to hold and fully confine the sample within said fluid circuit, effective that the sample remains separate from said detector.
25. The system of claim 1 , wherein said sample holder and said dark field illumination source comprise at least part of an optical analysis unit, said system further comprising a clinical analysis unit configured to perform clinical analysis on said sample.
26. The system of claim 25 , wherein each of said optical analysis unit and said clinical analysis unit are sized and configured to receive an aliquot of a single sample, effective that both an optical analysis and a clinical analysis may be performed on portions of a sample at the same time.
27. The system of claim 25 , wherein said clinical analysis unit is sized and configured to perform at least one clinical analysis selected from the group consisting of general chemical analysis, nucleic acid analysis, and enzyme-linked binding analysis.
28. The system of claim 1 further comprising an automated stage for receiving the sample holder, wherein the automated stage is configured to create relative motion between the sample holder and the detector in a pattern to visualize individual portions of the sample holder, and
wherein both the dark field illumination source and the detector are located below a plane where the automated stage receives the sample holder.