An off-the-shelf light-sheet microscopy ecosystem enables versatile cleared-tissue imaging across scales and applications

Imagine trying to understand a city by looking at a single brick, or by studying a map that only shows the streets but not the buildings. For decades, biologists faced a similar problem when trying to see inside living things. To study the intricate wiring of a brain or the blood vessels of an entire organ, they usually had to slice the tissue into thin, flat pieces, like a loaf of bread, and examine each slice under a microscope. This method destroys the three-dimensional connections that hold the organ together. A newer approach, called tissue clearing, solves this by making whole organs transparent, like glass, so light can pass through them. However, to see the details inside these clear, whole organs, scientists need a special kind of microscope that uses a thin sheet of light to scan the object layer by layer. These machines are powerful, but they have traditionally been expensive, complicated to build, and limited to doing just one specific job well.

A team of researchers has now introduced a new way to build these microscopes that changes the landscape of biological imaging. Instead of forcing laboratories to choose between different expensive machines for different tasks, they have created a flexible ecosystem of tools that can be assembled from common, off-the-shelf parts. This system, which they call descSPIM-Advanced, allows a single laboratory to build a microscope tailored to their specific needs, whether that means seeing tiny details, capturing massive organs in one go, or detecting many different colors at once. The researchers demonstrated that by swapping out a few key components, the same basic design can be transformed into four distinct versions, each optimized for a different challenge in seeing the invisible world inside our bodies.

The core idea behind this work is that high-end imaging does not need to be locked behind the doors of expensive commercial facilities. The researchers started with a basic, affordable microscope design they had previously developed and showed how it could be upgraded without starting from scratch. They built four specific versions to prove the concept. The first, named Galaxy, is designed to see many different colors at the same time. In a standard microscope, if you try to look at too many glowing markers at once, their colors blur together. The Galaxy version uses a special camera that can separate these overlapping colors, allowing scientists to track up to seven different biological structures in a single mouse embryo without having to stain and scan the sample multiple times. This capability opens the door to mapping complex interactions between different cell types in a single, intact volume.

The second version, called Deepsky, focuses on sharpness. While the basic microscope is good for seeing large structures, it cannot resolve the tiny details of individual cells. The Deepsky configuration swaps in higher-quality lenses and a scanning mirror to sharpen the image. The researchers used this setup to create high-definition, three-dimensional maps of kidney and lung tissues. The images were so clear that they could count individual cells and even generate false-color images that look like traditional stained tissue slides, but without the need for physical cutting. This proves that a laboratory can achieve subcellular resolution, seeing the fine architecture of organs, without needing a multi-million-dollar commercial instrument.

For scientists who need to see the biggest structures, there is Fullmoon. Some organs, like a whole mouse brain, are simply too large for standard microscopes to capture in a single view, forcing researchers to take hundreds of small pictures and stitch them together, a process that can introduce errors. The Fullmoon version uses a large-format camera and a wide beam of light to capture a massive field of view. The team demonstrated this by imaging a whole mouse brain that had been expanded to ten times its original size. They captured the entire expanded organ in a single shot, avoiding the need for complex stitching and preserving the integrity of the data. This allows for a complete, uninterrupted view of an entire organ system.

Finally, the team addressed the barrier of cost and complexity with a version called SLIM. They stripped the system down to its simplest form, using compact laser diodes and a minimal number of parts. This configuration can be assembled in just a few hours for approximately fifteen thousand dollars, a fraction of the cost of other systems. Despite its simplicity, it still produces high-quality, three-dimensional images of whole embryos. This version serves as an accessible entry point, allowing more laboratories to begin doing cleared-tissue imaging and upgrade their systems later as their needs grow.

All these different versions are held together by a shared software platform called the Mission Control Center. This software acts as a universal remote, allowing the same computer program to operate any of the four microscope configurations. This means a lab can start with the simple SLIM version and, as their research questions become more complex, reconfigure their hardware to become a Galaxy, Deepsky, or Fullmoon system without needing to learn entirely new software or buy a completely new machine. The researchers have made the blueprints, parts lists, and software available to the public, inviting other scientists to build and improve upon their designs.

The results of this work show that advanced, three-dimensional imaging is no longer the exclusive domain of well-funded core facilities. By proving that a modular, off-the-shelf ecosystem can deliver high performance across a wide range of applications, the researchers have democratized access to these powerful tools. They have shown that with the right design, a laboratory can build a microscope that is not just a single-purpose tool, but a versatile platform capable of growing with the science. This shift means that more researchers can now explore the full three-dimensional complexity of life, from the smallest cell to the entire organ, using instruments they can build and control themselves.