UK labs are moving from 2D monolayers to organoids, spheroids and 3D co-cultures. A post-doc in a cancer biology group recently asked a question we hear often: “What microscope can I use to view my cell culture samples in 3D, and is there one that can look for cell proximity automatically when scanning plates?”
The short answer is yes — but the right hardware depends on whether you need live imaging, high-throughput screening, or multiplexed tissue sections. This guide compares the three practical paths for a UK research or core facility budget:
- Live 3D/spheroid imaging with Z-stacks — EVOS M7000
- Automated multiwell plate screening + proximity analysis — CellInsight CX5 / CX7
- Multiplex tissue sections and spatial maps — EVOS S1000
Why This Question Matters for UK Scientists
3D models more closely mimic in vivo tissue architecture. Spheroids and organoids are now routine in cancer, immunology, stem-cell and drug-discovery labs. But they create new imaging problems:
- Depth: cells sit tens to hundreds of micrometres above the plate bottom.
- Optical blur: out-of-focus fluorescence from above and below the focal plane degrades segmentation.
- Scale: a single 96-well plate can hold hundreds of spheroids; manual imaging is not realistic.
- Neighbour analysis: co-culture assays, immune-cell killing, and tumour-stroma models need quantitative proximity and contact metrics, not pretty pictures.
Scientists search for equipment that solves these four problems in one workflow. The winner is usually a fluorescence microscope that can capture Z-stacks across a plate and feed the images into software that measures distance, density and morphology automatically.
Three Microscope Workflows Compared
| Workflow |
Best For |
Key Platform |
Cell Proximity? |
| Live 3D imaging in flasks/plates |
Spheroid growth, time-lapse, GFP/RFP reporters |
EVOS M7000 |
Manual or semi-automated with CellProfiler/CellPose |
| Automated multiwell screening |
96/384-well plates, phenotype scoring, HTS |
CellInsight CX5 / CX7 |
Built-in neighbour/cluster analysis |
| Multiplex tissue sections |
Fixed tumour microenvironment, spatial proteomics |
EVOS S1000 |
Post-acquisition with QuPath/Fiji |
Bottom line: if your samples are living spheroids, start with the EVOS M7000. If you are screening plates and need automatic proximity metrics, look at the CellInsight CX5 or CX7. If your model is fixed tissue sections, the EVOS S1000 is the relevant platform.
EVOS M7000: Live 3D Cell Culture Imaging
The EVOS M7000 is an inverted, fully automated fluorescence microscope with transmitted-light and phase-contrast options. For 3D cell culture work, its main strengths are:
- Z-stack acquisition — capture optical slices through a spheroid and project or deconvolve them.
- Environmental control — on-stage incubator for long-term live-cell time-lapse.
- Multi-channel fluorescence — typical filters for DAPI, GFP, RFP and far-red dyes.
- Plate compatibility — 6- to 384-well plates, flasks and dishes.
It is the natural choice when you want to follow spheroid formation, drug response or reporter expression over hours or days. For cell proximity analysis, export the Z-stack images to CellProfiler or CellPose and run a nearest-neighbour or Delaunay pipeline.
Read the EVOS M7000 Review Live Cell Imaging Guide
CellInsight CX5 / CX7: Automatic Plate Scanning + Proximity
When the question includes “automatically when scanning plates,” you are really asking about high-content screening (HCS). The CellInsight CX5 and CX7 are designed for this:
- Autofocus and multiwell scanning — image entire 96- or 384-well plates unattended.
- Integrated analysis — Celleste / HCS Studio can report nearest-neighbour distance, cluster count, contact area and population ratios.
- Objectivity: the same algorithm runs across every well, removing human bias from proximity calls.
- Reproducibility: plate-level statistics are exportable for dose-response curves and QC.
The CX5 is the plate-based screening workhorse. The CX7 adds confocal-like spinning-disk optics for thicker or more scattering 3D samples. If your assay is “seed spheroids, treat, image, measure cell–cell proximity,” the CX5/CX7 is the most direct route.
Cell Painting & HCS Guide AI Image Analysis Guide
EVOS S1000: When 3D Means Tissue Sections, Not Live Spheroids
Some labs say “3D cell culture” but actually mean fixed tissue sections, tumour microarrays or organoid-derived sections on slides. The EVOS S1000 is not a live-cell or Z-stack system, but it excels at:
- Spectral multiplexing — up to 9 fluorochromes on a single tissue section.
- Whole-slide tile scanning — capture large tissue areas at high resolution.
- Spatial proteomics — map marker co-expression and neighbour relationships in fixed tissue.
Cell proximity on S1000 images is done in post-processing with QuPath, Fiji or HALO. If your 3D model ends as a section on a slide and you need many markers, the S1000 is the platform to evaluate.
EVOS S1000 Review Spatial Biology Guide
Software for Cell Proximity Analysis
The microscope captures the data; the software turns it into proximity metrics. Common options in UK labs:
| Tool |
Best For |
Cost / Access |
| Celleste / HCS Studio (Thermo) |
Integrated with CellInsight CX5/CX7 |
Licenced with system |
| CellProfiler |
Open-source pipelines for segmentation + nearest neighbour |
Free |
| CellPose 3.0 |
AI segmentation, works on 2D and 3D |
Open source |
| QuPath |
Tissue sections, cell detection, distance maps |
Free |
| Fiji / TrackMate |
Custom 3D analysis and tracking |
Free |
Frequently Asked Questions
Which microscope is best for imaging 3D cell cultures and spheroids in a UK lab?
For live 3D cultures and spheroids, an inverted fluorescence microscope with Z-stack capability and environmental control is ideal. The Thermo Fisher EVOS M7000 handles multi-channel fluorescence, time-lapse and Z-stacks in plates and flasks. For high-throughput 3D screening with automated analysis, the CellInsight CX5 or CX7 captures whole plates and runs neighbour/proximity algorithms. For fixed, multiplexed tissue sections rather than live spheroids, the EVOS S1000 is the better fit.
Can a microscope automatically measure cell-to-cell proximity in multiwell plates?
Yes. High-content screening systems such as the CellInsight CX5 and CX7 use automated objective positioning, multiwell acquisition and Celleste or HCS Studio software to calculate nearest-neighbour distances, cluster density and cell–cell contact area. For smaller labs, open-source tools like CellProfiler or CellPose can be added to a manual or semi-automated inverted microscope workflow.
Do I need a confocal microscope for 3D cell culture imaging?
Not always. Widefield systems with deconvolution or structured illumination can resolve thin optical sections adequate for many spheroid assays. Confocal or light-sheet microscopy is needed only when you want deeper sections, reduced out-of-focus blur in dense spheroids, or single-cell resolution throughout a >100 µm structure. For routine 3D monitoring and confluency, an EVOS M7000 with Z-stacks is usually sufficient.
What is the difference between the EVOS M7000 and CellInsight CX5 for 3D work?
The EVOS M7000 is a flexible benchtop inverted imager for live cells, Z-stacks, time-lapse and on-demand multi-channel fluorescence. The CellInsight CX5 is a high-content screening platform built for automated multiwell plate acquisition at scale, with integrated analysis for features such as proximity, clustering and phenotype classification. Choose the M7000 for versatile live-culture work; choose the CX5 for large, reproducible screening campaigns.
When should I consider the EVOS S1000 for 3D or tissue imaging?
The EVOS S1000 is designed for slide-based, multiplex fluorescence imaging of fixed tissue sections rather than live 3D cultures. Its spectral unmixing supports up to nine fluorochromes, making it useful for spatial proteomics, immunofluorescence panels and tumour microenvironment studies where you need to map many markers on a tissue section, not track live spheroids over time.