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
48th meeting, 13th of January 2025
Meeting date
13/01/2025 @ 5:00 PM (CET/CEST)
Meeting summary
After the usual short organisational matters and news section, we started right away with an overview over the work done on our protocols collection since the last meeting.
There have been done updates to the figures and figure legends, and all links have been checked and updated. All authors gave their consent to their respective authorship, author order, and listed contributions. Author contributions and funding are listed in each protocol via two respective pdfs in the acknowledgment section. In addition, we looked at an example protocol run including how to add comments, to see the difference between viewing a protocol versus running it.
Subsequently, we went through the collection and all protocols to have a last check of the respective content. Several small but significant changes were made. An exhaustive list of this changes can be found in our meeting minutes. We agreed to collect and save all images and figures used for the protocols on the QUAREP-LiMi cloud. A folder will be set up for this in the WG2 work done folder.
At 6:20 PM we did publish our protocols collection. You can find the titles and DOI links below.
After this great achievement we had the pleasure of welcoming our new member Nicolas Stifani from Montreal.
For finalising our other current major project, the NBO-Q camera model and glossary, there are four meetings scheduled in January. There will be a detailed report about this project in the February meeting. In addition, in the next meeting we will take time to discuss the next steps and goals for our future WG2 work.
Collection:
Characterization of the Photon Conversion Factor, Noise, and Dynamic Range of Light Microscope Detection Systems
Separate protocols:
1. Introduction – Background and Aims
2. Sample Preparation – An Easy-to-Prepare Sample Slide
DOI: dx.doi.org/10.17504/protocols.io.x54v92b91l3e/v1
3. Data Generation – Systems with an Area Detector
DOI: dx.doi.org/10.17504/protocols.io.bp2l62eorgqe/v1
4. Data Generation – Systems with a Point Detector
DOI: dx.doi.org/10.17504/protocols.io.j8nlk8176l5r/v1
5. Analysis – Characterization of the Photon Conversion Factor, Noise, and Dynamic Range
47th meeting, 9th of December 2024
Meeting date
09/12/2024 @ 5:00 PM (CET/CEST)
Meeting summary
We started the meeting with a short discussion about our meeting day, time, and length of the meeting. In the end we decided to keep the current scenario of meeting each second Monday of a month for 90mins from 5:00 – 6:30 PM CET. This discussion was followed by a short report from the last two QUAREP-LiMi SC meetings. The main message for us was that the SC approved of our request to publish our protocols collection. This approval included the conditions that we solve all open comments and clarify author contributions following the CreDiT taxonomy. It was suggested to us to add a document to each protocol with the respective author’s contribution list. The reminder of the meeting we used to go through the comments at the collection, the protocol 1. introduction, had a quick look at the protocol 2. – Sample Preparation, and started going through the comments of protocol 3. Data Generation – Systems with Area Detector. Since there were quite a few very helpful last minute comments, we did not manage to finish going through the protocols. We are still aiming to finish and publish before the holiday season. Therefore, we decided to meet again this week Thursday, December 12th, from 4-5PM CET in the WG2 zoom room. Everybody is welcome to join.
At the end of the meeting we briefly talked about the current status of the NBO-Q camera model and glossary project. We finished the series of meetings revisiting the hardware part of the model after the first change updates. The latest changes are being added to the model. The debriefing group is working on preparing the settings part of the model. Another stakeholder meeting series will be organised for January 2025.
We closed the meeting by having a quick look at the list of To Do’s for next year.
46th meeting, 11th of November 2024
Meeting date
11/11/2024 @ 5:00 PM (CET/CEST)
Meeting summary
After the usual short organisational matters and news section, we started our meeting with the presentation by David Grunwald about his soon to be published MetaMax manuscript. MetaMax is a tool hat can be used for detector calibration. The main request from David is to check if there is any input from our WG2 work that needs to be acknowledged. You can find the manuscript and a document for your comments in our 46th meetings folder.
Next Britta presented a request from WG1 to review version 3 of its protocol on measuring illumination power and stability. Version 3 now contains also measurement requirements for multi-photon systems. In addition, it has an improved table of contents and its text was modified for clarity and accuracy. Please give comments, feedback, and endorsement directly in protocols.io until end of November.
The NBO-Q camera model ad glossary is planned to be finished by the end of this year. To achieve this, three new stake holder meeting dates were announced (Nov 11th, Nov 22nd, Dec 4th). A lock-in meeting to prepare the settings part is planned on Dec 4th. Please watch out for the invitation emails.
The main part of our meeting was again dedicated towards finalising our WG2 protocols collection. We got several helpful and positive comments from WG2 members and also members from other WGs. The most urgent comment was for us to clarify our aim 1. We discussed this and agreed on a version. For the reminder of the meeting we split into two break out rooms to work on the collection, protocols 1 (introduction) and 5 (analysis) in one room and protocols 2 (sample prep) and 3 and 4 (data collection) in the other room. Since we did not manage to finish, we agreed to have extra meetings to work on the protocols (see meeting minutes for exact dates and time). Our aim is to present the final collection to the steering committee on December 3rd for approval to publish.
Addendum: Britta presented our protocols collection draft during the SC meeting on November 12th. We got the OK to present our collection for publication approval in the December 3rd meeting.
45th meeting, 14th of October 2024
Meeting date
14/10/2024 @ 5:00 PM (CET/CEST)
Meeting summary
We started the meeting with a brief report from the last steering committee meeting followed by a short report about the current status of the work at the NBO-Q camera model and glossary. The camera model work is progressing steadily. We aim to finish the hardware part first and then continue with the settings part. To prepare well for this, a small group will meet beginning of December. More stakeholder meetings will take place in October and November.
The main part of our meeting was spent working on our protocols collection. By now we reserved the DOIs for later publication and sent emails to the co-chairs of the other WGs to ask for feedback. We discussed to also present during upcoming meetings of other WGs if possible and appropriate. We aim to publish the collection until the end of 2024. For that we need to either present in the SC meeting in November or December.
Decision will be made in our November WG2 meeting. The reminder of the meeting we worked on our protocols collection going through the comments we already received there.
44th meeting, 9th of September 2024
Meeting date
09/09/2024 @ 5:00 PM (CET/CEST)
Meeting summary
After the summer break, the WG2 meeting was a good opportunity to redefine our deadlines for completing our protocol collection.
We discussed guidelines and disclaimers, the collection of new sample images, and formed small groups to finalize each protocol for sending out our collection for testing and comments to the whole QUAREP-LiMi community as soon as possible.
WG2, together with WG7, is also involved in finalizing the camera model and glossary part of the NBO-Q model schema. To conclude the revision process, we will hold three further meetings with the stake-holder group still this month.
The preparation of both, the protocol collection as well as the NBO-Q camera model and glossary, is very important for achieving our next goal, the publication of our first paper.
43rd meeting, 8th of July 2024
Meeting date
08/07/2024 @ 5:00 PM (CET/CEST)
Meeting summary
Since we had previously decided to skip our regular WG2 August meeting, we agreed to use August for finalising our protocols. On August 19th we will meet at our usual WG2 time (5:00 – 6:30PM CEST) for a protocols collection hackathon. This discussion was followed by short reports from the QUAREP-LiMi SC meeting, from the Dutch microscopy association, and about a new QC white paper by evident. During the subsequent agenda point we talked about the next steps towards finalising the NBO-Q camera model and glossary. First final revision meetings by the stakeholder groups were planned for July.
The main agenda point of our 43rd meeting was discussing the next steps towards finalising our protocols for publication. We agreed on the following timeline: until August 19th finalise separate protocols, put them into one collection during the hackathon on August 19th, get the protocols collection tested theoretically and practically and collect example measurements until October 14th. Implement comments and example measurements until November 11th (our WG2 meeting) and present the final protocols collection to the QUAREP-LiMi steering committee on November 12th. To finalise our separate protocols, we formed four small teams who will organise respective discussion meetings. For this version of the protocols collection we decided to keep separate protocols for point and area detectors, respectively. We plan to add protocols based on the French QC paper in the next version of our protocols collection.
Working Group 3
Working Group 4
49th meeting, 16th of September 2025
Meeting date
16/09/2025 @ 5:00 PM (CET/CEST)
Meeting summary
LacJ updated the group on the latest news from QUAREP-LiMi. The group then discussed the results and the discussion section of the protocol, and it was agreed to include the data obtained using MetroloJ_QC, where the experimental distance is normalized to the reference distance. The group also addressed the naming convention, in light of the new data being generated for both widefield (WF) and spinning disk confocal (SDC) systems.
48th meeting, 17h of June 2025
Meeting date
17/06/2025 @ 5:00 PM (CET/CEST)
Meeting summary
LacJ presented a report from the last SC meeting. AzeM informed the group that a new OB representative is needed. The group discussed the recent modifications to the protocol made by DauA and agreed on the next steps to finalize it: DauA and AzeM will collaborate on developing the discussion section. It was also decided to begin acquiring new datasets using widefield (WF) and spinning disk confocal (SDC) systems. A new batch of slides containing 1 µm TetraSpeck beads will be sent to those interested in acquiring images. The group will take a summer break in July and August, with the next meeting scheduled for September 16th.
46th meeting, 15th of April 2025
Meeting date
15/04/2025 @ 5:00 PM (CET/CEST)
Meeting summary
WG04 members began the meeting by discussing feedback from the annual meeting. The author list on protocols.io was also addressed, and it was agreed that all co-authors should enter their full institutional address in the affiliation section under the “Organization” sub-tab.
The group also discussed the upload of WG04 data into OMERO and reviewed the adopted naming conventions.
Regarding next steps, members agreed to move forward with improving the first version of the WG04 protocol. The immediate goal is to adapt the protocol for use on confocal spinning disk and widefield microscopy systems.
44th meeting, 18th of February 2025
Meeting date
18/02/2025 @ 5:00 PM (CET/CEST)
Meeting summary
In the latest WG04 meeting, members reviewed the feedback received from a co-chair of another WG on the first version of the protocol. Final adjustments were discussed and agreed upon to refine the document before publication. Additionally, the group addressed authorship matters, ensuring proper acknowledgment of contributions and clarifying the necessary updates to affiliations on protocols.io.
Working Group 5
48th meeting, 14th of April 2025
Meeting date
14/04/2025 @ 3:30 PM (CET/CEST)
Meeting summary
The protocol V2 was discussed and it was voted to pass the next version of the protocol to the SC.
For the upcoming ELMI workshop, plans were initiated to host a one-hour session, considering point source and line patterns, and coordinating tasks among participants.
An update on the paper shared insights on confocal SBR and r² values, noting differences due to noise factors. Discussions included data analysis techniques and the challenges of data variance over time. The meeting concluded with a call for organizing data in OMERO and an update on a new ISO norm for metadata, inviting community participation. The next meeting is postponed by a week to accommodate a French national holiday.
Working Group 6
Working Group 7
17th meeting, 19th of September 2022
Meeting date
19/09/2022 @ 5:00 PM (CET/CEST)
Meeting summary
The work of QUAREP-WG7 is done within WG7-Subgroups that have clear goals listed on the WG7 homepage (https://quarep.org/working-groups/wg-7-metadata/).
The general meeting serves as a space for reporting back on the progress that has been achieved within the Subgroups, connecting the dots, strategic planning, and general discussions.
This organization allows WG7 to carry out several parallel tasks that span from image metadata model specifications, the development of metadata collection tools, the improvement of the metadata storage formats, and the development of educational and training material to onboard biomedical researchers.
DECISIONS:
- The general organization of WG7 is sound, and it will be maintained.
- To leave more time for Subgroup work and reduce time waste, it was decided that we will reduce the frequency of WG7 general meeting while making Subgroup meetings regular and consistent.
- Specifically, the general meeting will be held on the third Monday once every 2 months —> NEXT GENERAL MEETING will be on 11/21/2022 (17:00 CEST / 11:00 EST)
- The same slot will be utilized as needed by the subgroups. For example, the next WG7-Subgroup 2 meeting will take place on the 17th of October (17:00 CEST / 11:00 EST).
- At the same time, it is essential to improve communication and progress management to make sure people have a clear idea of what is happening, and how they can contribute.
- To facilitate the division of labor and communication, we will create granular task lists in Excel and link the list from the WG7 homepage (https://nextcloud.quarep.org/index.php/s/DgJBQnjg3jSMgx8). The list will be bae on the tasks emerging from Sub-Group meetings, will provide precise instructions, and include clear due dates (e.g. Subgroup 1: TASK = provide feedback on Micro-Meta App Confocal canvases; DUE=10/17/2022)
16th meeting, 18th of July 2022
Meeting date
18/07/2022 @ 5:00 PM (CET/CEST)
Meeting summary
Despite considerable progress (publications, collaborations with other working groups, feedback from manufacturers, further development of metadata collection tools, educational material, outreach, etc.), participation has been waning.
To address this issue, we discussed the following topics:
1) What can we do to improve motivation and participation?
2) What should be our goals for the upcoming year?
The discussion was very animated and participated. Several constructive suggestions were made. In summary:
1) Having subgroups allows to achieve tasks, but it can be very confusing. It is important to improve the organization of the work and communication to members on what needs to be done and what is done:
– agreed upon, small, and achievable tasks
– clear schedule (always advertised on the QUAREP calendar)
– report back consistency on goals and progress
2) It is important to shift focus from Microscopy Metadata to Experimental/Sample Metadata capture. Would it make sense for WG7 to be involved in developing standards around these topics?
3) It is important to develop guidelines but for work to be successful and productive, WG7 has to be involved with developers to produce tools that implement the guidelines and bring them to life for imaging scientists.
Next steps:
– The August meeting is canceled. See you back in September
– In September, all Subgroups will have a meeting to organize next year’s schedule (regular or not?) goals and activities.
– Co-Chairs will meet to decide whether a survey to collect feedback on future goals is needed for all WG7 members (even those that do not participate in sub-groups).
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.