Patterned X‑ray method yields fast 3‑D chemical imaging with fewer scans

A team led by Bar‑Ilan University, in collaboration with multiple partner institutions, has introduced an X‑ray imaging technique capable of rebuilding an object's three‑dimensional chemical makeup while requiring far fewer measurements than conventional methods.

Traditionally, visualizing a sample’s internal chemistry in three dimensions demanded either prolonged tomographic scans or intricate spectroscopic configurations, each being time‑intensive and delivering substantial radiation to the specimen. Conventional approaches typically gather a complete series of angular projections before processing the data to isolate elemental contributions.

This novel strategy swaps the exhaustive scanning routine for a set of patterned X‑ray illuminations. By directing a succession of structured X‑ray beams onto the specimen and capturing the ensuing intensity patterns, the researchers can deduce the spatial arrangement of various elements using markedly fewer exposures. Subsequent computational algorithms interpret the sparse dataset, generating a three‑dimensional chemical map in a much shorter period.

Central to the technique are mathematically crafted illumination patterns that extract maximal information per exposure. Coupled with sophisticated reconstruction software, the method pulls both structural and compositional signals from the limited data, essentially compressing what would ordinarily be a voluminous dataset into a concise form while preserving precision.

The approach holds promise across numerous disciplines. In materials science, rapid evaluation of alloy makeup or impurity detection could speed up prototype assessments. Pharmaceutical producers might employ it to confirm the homogeneity of drug formulations. Conservators of cultural artifacts could probe layered pigments while minimizing radiation, and medical scientists anticipate low‑dose imaging of mineralized tissues.

The team intends to fine‑tune the pattern designs and investigate coupling the method with current synchrotron installations. Ongoing validation across varied sample types is in progress, and partnerships with industry aim to convert the laboratory proof‑of‑concept into a market‑ready imaging instrument. Success could establish a new benchmark for swift, low‑dose chemical tomography.