IIT-Madras gets a new task from PM Modi: Create largest 3D brain map atlas

Prime Minister Narendra Modi launched IIT Madras’s project to create a large, publicly accessible collection of cellular-resolution 3D maps of more than 100 human brains. The goal is to show the brain’s cellular landscape in three dimensions, beyond what ordinary anatomical images reveal. This could support research into development, ageing and disease.

The Sudha Gopalakrishnan Brain Centre will use specialised imaging and high-performance computing. Researchers will turn entire post-mortem human brains into detailed digital maps. The project includes brains from the earliest foetal stages through old age, as well as disease-affected brains.

More than 200 researchers, engineers and technicians are involved. The effort also connects over 10 Indian medical institutions with more than 30 leading researchers from over 10 countries. Because the maps will be open access, scientists and medical professionals worldwide can study them and develop new research questions.

A cellular-resolution 3D brain map is a detailed digital representation of an entire human brain, showing its cellular landscape in three dimensions. It helps researchers examine how brain tissue is organised, rather than seeing only broad anatomical structures. That matters because development, ageing and disease involve changes within tissue and cells.

The centre will create these maps from post-mortem human brains using specialised imaging technology and high-performance computing. By contrast, the article describes MRI as a clinical tool that captures stroke-related structures at a millimetre scale. Histology, the microscopic examination of tissue, works at micron-level resolution.

The two views answer different questions. MRI shows larger patterns that doctors can identify clinically, while cellular mapping reveals finer changes inside tissue. Bringing detailed maps together in an open-access resource could help researchers compare brains across ages and diseases and investigate how cellular organisation changes.

IIT Madras’s project is designed to cover more than 100 human brains. Its unusually broad scale is intended to create a resource spanning the human lifespan, rather than focusing on one age group or condition. Researchers want to compare cellular organisation as the brain develops, ages and changes during disease.

The collection will begin with the earliest stages of foetal development and continue through old age. It will also include brains affected by disease, allowing researchers to examine changes associated with neurological conditions. The centre plans to transform entire post-mortem brains into detailed digital 3D maps.

The work involves more than 200 researchers, engineers and technicians, over 10 medical institutions across India, and more than 30 leading researchers from over 10 countries. Together, these collaborators are building a global, open-access resource for brain science and medicine. The article does not list every disease or the exact number of disease-affected brains.

C-STROKE is an open-access atlas of human ischaemic stroke. IIT Madras describes it as the world’s first such atlas. Its purpose is to connect the brain damage seen in clinical imaging with the underlying changes in brain tissue.

The atlas contains more than 1,000 annotated sections from a stroke-affected brain. MRI provides images of the same brain at millimetre-scale resolution. Researchers then compare those images with histology, which examines tissue microscopically at micron-level resolution. The sections map neuronal health, inflammation, blood-brain barrier damage, oxygen deprivation and nerve-fibre injury.

This direct connection lets researchers examine how microscopic damage corresponds to visible MRI patterns. C-STROKE was generated using the Param Shakti supercomputer, with support from the Ministry of Electronics and Information Technology. Its open-access viewer and analytical tools are intended to let researchers worldwide explore the data.

An ischaemic stroke occurs when a blood vessel supplying the brain becomes blocked. The blockage interrupts the flow of blood to part of the brain. As a result, brain cells are deprived of oxygen and nutrients, which can damage the affected tissue.

C-STROKE examines what happens inside that damaged tissue. Its more than 1,000 annotated sections map several features, including neuronal health, inflammation, blood-brain barrier damage, oxygen deprivation and injury to nerve fibres. These microscopic findings come from a stroke-affected human brain.

Doctors typically identify stroke-related damage using MRI, which shows structures at a millimetre scale. The atlas adds histology at micron-level resolution, allowing researchers to inspect the tissue more closely. By comparing these levels, scientists can connect the blocked blood supply with cellular changes and the larger patterns visible in clinical images. The article presents this as a foundation for better stroke research.

MRI shows stroke-related damage at a millimetre scale, but it does not by itself provide the same microscopic detail as tissue examination. C-STROKE links MRI images to histology from the same stroke-affected brain. This gives researchers a way to relate visible imaging patterns to cellular changes.

For example, the atlas maps neuronal health, inflammation, blood-brain barrier damage, oxygen deprivation and nerve-fibre injury across more than 1,000 annotated sections. Researchers can compare these findings with the corresponding MRI patterns. The key mechanism is the direct connection between a clinical image and microscopic evidence from the same brain.

This comparison could improve understanding of the biological processes behind stroke damage. It could also help researchers identify potential targets for future treatments. C-STROKE’s open-access viewer and analytical tools allow researchers worldwide to examine the data. The article describes these as possibilities, not established treatments or guaranteed outcomes.

The brain can be studied at different levels, and each level reveals different information. MRI captures structures at a millimetre scale, while histology examines tissue at micron-level resolution. Cellular-resolution 3D maps add a broader three-dimensional view of how cells are arranged throughout entire brains.

C-STROKE demonstrates why these scales need to connect. Researchers can compare MRI patterns with microscopic evidence from the same stroke-affected brain. That evidence includes neuronal health, inflammation, blood-brain barrier damage, oxygen deprivation and nerve-fibre injury. The comparison links a visible clinical pattern to changes inside brain tissue.

Using several scales could help researchers follow how the brain develops, ages and changes during disease. It may also clarify which cellular processes lie behind larger anatomical patterns. IIT Madras plans to make these detailed resources publicly available, giving scientists and medical professionals worldwide data for further investigation. The article presents this as a research opportunity, not a completed explanation.