Working Group 1
Quality Assessment and Reproducibility for Instruments & Images in Light Microscopy
The Consortium for Quality Assessment and Reproducibility for Instruments and Images in Light Microscopy (QUAREP-LiMi), formed by the global community of practitioners, researchers, developers, service providers, funders, publishers, policy makers and industry related to the use of light microscopy, is committed to democratizing access to quantitative and reproducible light microscopy and the data generated by it.
Our mission is to provide a comprehensive set of community-agreed guidelines, protocols, automation procedures and other resources aimed at improving quality control, quality assurance, and instrument/method calibration. The stakeholders advocate for the use of the highest level of reproducibility for data generated by light microscopy methods in scientific research and biotechnology applications. In support of achieving its mission, QUAREP-LiMi:
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sanctions Working Groups to form teams that focus on specific technical or outreach topics;
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maintains, disseminates, and teaches best practices, protocols, and software tools; and
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collaborates with providers of reference materials or instrumentation or other tools that enable the easy implementation of best practices at the community level.
We came together in our first online Web meeting on the 28th of April, 2020, with about 50 attendees. By now (24st of April 2024), the network has grown to 620 people from 41 countries worldwide. We have members from academia (research labs, core facilities), national microscopy communities, companies involved in the microscopy business, organizations or institutions related to standardization on a national or international level, and scientific publishers and observers from funding agencies (see the graph below and on the member page for an overview).
Ten working groups (WGs) were established in the 2nd General Meeting on the 9th of July 2020 to bring our common aims quickly forward. Our web page gives an overview of QUAREP-LiMi’s work. In the 3rd General Meeting, WG 11 “Microscopy Publication Standards” and later WGs 12 “Image Visualization and Analysis” and 13 “Phototoxicity” were established. WG 14 “Environment” and 15 “FLIM” are in the process of being established, and WG 8 is restructured to work on “Education, Training and Outreach”.
QUAREP-LiMi operates a NextCloud and an OMERO server, serving as a centralized repository and exchange point for our collective work. These platforms facilitate collaboration and data sharing among our members.
QUAREP-LiMi is absolutely open to new members, and we are looking forward to your contribution. If you are interested in joining our initiative, please fill out our membership form. Use our form for changing your working group (WG) or joining a new WG. For any further questions, please contact us.
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Working Group 2
18th meeting, 11th of April 2022
Meeting date
11/04/2022 @ 5:00 PM (CET/CEST)
Meeting summary
At the beginning of our 18th meeting, we talked about a few organisational matters and shared general QUAREP-LiMi news: the next general assembly will take place May 25th 2022, 4-6PM CEST.
This was followed by reports from the the last two WG2 & WG7 camera glossary meetings. The main topic for both meetings was what defines a colour camera. It was reported that that joined discussion group also needs input from WG2 about what we require the model to deliver. The ensuing discussion pointed out: commonly used glossary and definitions, to be used in methods sections, for spec sheets, TIER level needed with minimal specs required and additional specs available upon request.
The APE Quantiflash test samples will be shipped to their first testes soon. The transfer of our data collection to Airtable is under way. More infos to both topics will come in the next meeting.
Last but not least, we discussed the next steps towards finalising the first part of our protocols and moving them to protocol.io following the example and experience of WG1. Until the next meeting, each subgroup will look at their respective protocol draft, go over the text and identify open questions. We agreed to finalise the structure with a general introduction and branching or similar feature for the AD and PD protocols. The aim is to have a teaser ready for ELMI, publish the protocol in autumn.
To be able to do so, we need to have more people test the protocols, measurement and analysis.
Working Group 3
Working Group 4
37th meeting, 21st of May 2024
Meeting date
21/05/2024 @ 5:00 PM (CET/CEST)
Meeting summary
WG4 acknowledges the acceptance of the QUAREP by-laws. Judith Lacoste serves as the WG4 Steering Committee (SC) representative, Ileana Micu as the Editorial Review Board (ERB) representative, and Christian Kukat as the Ombuds Board (OB) representative. Also, Maria Azevedo is now co-chair with Aurélien Dauphin. An overarching publication involving WG03, WG04, WG05, and a microscope manufacturer was discussed, and suggestions for WG04 representatives to participate were put forward. An update on the naming convention was provided, and the group discussed what should be included for WG04 datasets. Importantly, WG04 will not meet in June; however, an email containing updates on the naming convention and instructions to test OMERO will be sent. The next WG04 meeting is scheduled for July 16th.
36th meeting, 24th of April 2024
Meeting date
24/04/2024 @ 5:00 PM (CET/CEST)
Meeting summary
A microscope manufacturer is using the QUAREP protocols to provide time-0 measurments before shipping units to its customers. The manufacturer‘s team presented on what seems to be a code implementation issue for the calculation of the reference surface used to calculate the co-registration performance with the tool MetroloJ QC. With the supporting references, they show that the way code is currently written, the 3D reference surface is rendered as a peanut shape instead of an ovoid elongated sphere. As a result of this, the XY and Z co-registration accuracy is not correctly assessed. The authors of MetroloJ_QC will be contacted to present them these findings and ask for feedbacks.
35th meeting, 19th of March 2024
Meeting date
19/03/2024 @ 5:00 PM (CET/CEST)
Meeting summary
WG04 pursues the analyses of 1um beads datasets for color co-registration, comparing different software. There was a discussion regarding measurements of signal to background ratio on aging bead preparations. The group discussed about how detectors settings and metadata can have an impact on the co-registration analysis results. Please note the next WG04 monthly meeting date. It was moved because of QUAREP annual meeting. Lastly, many thanks to the members who agreed to become co-chairs and representatives of WG-04: Maria Azevedo, Aurélien Dauphin, Christian Kukat, Judith Lacoste and Ileana Micu.
34th meeting, 20th of February 2024
Meeting date
20/02/2024 @ 5:00 PM (CET/CEST)
Meeting summary
Today the proposed QUAREP by-laws were presented. WG04 is grateful to those who worked with David Grunwald for the preparation of this impressive document. The by-laws will be submitted for approval during the QUAREP annual meeting next April. In the mean time, WG04 is asking its members to come forward for the following positions in our workgroup: WG04 co-chairs, a WG04 steering committee representative, a WG04 editorial review board representative and a WG04 ombuds board representative. In addition, QUAREP will need to elect 13 persons on the steering committee and 3 persons on the ombuds board. Our organisation just reached 600 members, for sure there will be new people joining on the above committees to make QUAREP better. Please let us know of your interest in the above positions. A big thanks in advance!
Working Group 5
Working Group 6
Working Group 7
33rd meeting, 17th of February 2025
Meeting date
17/02/2025 @ 5:00 PM (CET/CEST)
Meeting summary
The meeting covered updates on France BioImaging’s metadata efforts, including OMERO.quay beta testing, buffer server deployment, and authentication improvements. WG10 discussed defining “raw” images and their metadata requirements, emphasizing the need for clarity on file formats. The website report highlighted the need for better organization and visibility of resources, with a proposal to create a landing page and potentially rebrand NBO-Q. Discussions on synonyms and profiles addressed term mapping challenges and possible alias extensions. Additional topics included a McGill student project porting NBO-Q to LinkML and preparations for an ISO discussion at OME2025. The next meeting date requires rescheduling due to Easter.
31st meeting, 21st of October 2024
Meeting date
21/10/2024 @ 5:00 PM (CET/CEST)
Meeting summary
The following topics were discussed:
- Report back on work done by members of the WG to align the terminology used in the upcoming WG11 checklist with NBO-Q
- Mandate from the SC to WG7 to generate an NBO-Q landing page.
- The primary target audience for the NBO-Q landing page is QUAREP members.
- The NBO-Q landing page will start by simply delineating the data model and why it is essential to the QUAREP mission. Subsequently, more content, including examples and visualizations, will be added gradually. A group of volunteers were identified to work on moving this project forward. They will present their work during the next meeting.
- In all we do, it is essential to advance together and develop consensus with all members of QUAREP. To this aim, it is crucial to educate all members of QUAREP on what metadata is, how metadata can be represented in machine and human-readable manners, and why organizing metadata in a model is essential.
Working Group 8
Working Group 9
Working Group 10
34th meeting, 10th of December 2024
Meeting date
10/12/2024 @ 4:00 PM (CET/CEST)
Meeting summary
Presentation by Siân Culley (King’s College London): be there!
30th meeting, 12th of March 2024
Meeting date
12/03/2024 @ 4:00 PM (CET/CEST)
Meeting summary
This meeting will be dedicated to a quick review of the RID parameter, a global discussion about the new parameter AS told us about and importantly, the ByLaws document with the need of volunteer candidates for the various positions (SC, EBR, OB).
Working Group 11
40th meeting, 22nd of May 2025
Meeting date
22/05/2025 @ 5:00 PM (CET/CEST)
Meeting summary
1-During the last meeting, you expressed your wish to publish the bare minimal list as a standalone document instead of the comprehensive manuscript we were initially envisioning. The main concerns we have are figuring out the type of journal that accepts this format/content and the fact that there are at least 3 publications providing guidelines/checklists for methods reporting.
2-The second action item was to organize the live document that we created a long time ago in which we determined what was level 1 (required), 2 (depends on the application), 3 (nice to have) to build a logic tree for biologists to generate the appropriate checklist depending on the experiment they did.