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- Start Harmony software
- Log-in with user account: personal account, with personal settings
- User accounts can only delete own data. Administrators can delete all.
- info: The software is process-oriented; (re)configuration and data generation are alternating.
- Choose plate. Nomenclature = number of wells, manufacturer, type/name of plate
- Choose objective. Start at eg. 20x / 0.4 NA
- Choose operational mode (opt-mode). Confocal = spinning disc mode, with pinholes, 5% transmission of light, both ways. Epi = non-confocal, 100% transmission of light, both ways.
- Binning: (makes image size <4.7 Megapixel) → signal x4, noise x2, resolution significantly reduced.
- Live preview: eg. Show current image during stack acquisition. off = evaluate manually after setting up acquisition.
- Click "new" → new experiment.
- Set up individual channels for your fluorophores.
- info: Arrowheads under menus always reveal more detailed settings.
- Plate layout (right-most). Select wells to measure, click "SELECT". Select FOV, number, position.
- Select well-to-test.
- Clean plate-bottom with KimTech wipe and 70% Ethanol before use.
- Load plate (place within protrusions).
- or: Load slides in holder.
- or: Load slide holder into Operetta.
Setting up for imaging:
- Evaluate brightness; auto-scale and auto-contrast are always applied.
- No range-indicator (over/under exposure) is available, but a histogram for each channel is displayed
- Scaling: Normal mode: Black-to-Colour. Enhanced mode: Black-to-Colour-to-White.
- info: right-click on the sample image, "show intensity". Ctrl + Click to add ROIs.
- Find focus height: Z-stack!
- Start at negative values. Go up to positive. See in "TEST IMAGES" (right of screen)
- info: pick the right focus height for each channel individually.
- Do focus finding in another cell
- info: it is possible to disable "use z-stack in test" to trial only single-plane images
- info: if you want no stack acquisition upon running the actual experiment, simply select "0 planes"
- Overview picture: in the "well layout" section, select all interesting wells; right click "overview;" preview field: observe the stitched image afterwards.
- The overview picture is automatically downscaled to 200 MB in size; full-resolution stitching is not supported.
- Double-check overlap: Pull up the contrast to an extreme value (visually; right-click in the image)
- Determine whether flat-field correction will be necessary.
- "online-job" = perform image analysis during acquisition
- info: Can add layouts (labels) to the output data. This is an additional table.
- info: re-use a plate layout (saved, from eg. editor or previous experiment); "Assay" in "define layout" (right-most).
- info: using "Test Images", and marking regions, right-click and "use as background for well" for a visual aid for selecting further regions.
Run experiment
- Evaluate that the correct assay is loaded.
- Name the plate and add keywords.
- → Start! And observe live-preview images during acquisition (when enabled)
- Select the whole plate, right-click, organise images in "realistic" (corresponding to the plate) or "packed" (best for display) layouts
- info: The software can do flat-field correction based on acquired images, provided that foreground/background and areas without cells are present. This also works in wells filled with tissue or more-than-confluent cell cultures.
- When done: open the lid (settings - Operetta CLS - open) and remove plate/slide holder.
Loose info pieces:
Operetta CLS: z-steps > 100 nm
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