TGS transmission measurement scanning dataset with array detectors based on Geant4

This dataset consists of transmission measurement data for tomographic gamma scanning (TGS) simulated using Geant4, designed with an array detector configuration to emulate the operation of real-world non-destructive assay systems in nuclear facilities.The simulation employs a monoenergetic gamma-ray source at multiple energy levels, including 0.122 MeV, 0.344 MeV, 0.799 MeV, 0.964 MeV, 1.112 MeV, and 1.408 MeV. Gamma rays pass through objects with varying densities and compositions, and the transmitted intensities are recorded by an array of detectors.The scanning process involves single-axis rotation covering 360 degrees, with each angle corresponding to the transmission response from multiple detector channels.Each CSV file in the train_data directory represents the ART-reconstructed result of a simulated experiment, with filenames indicating the gamma energy used. Files in the target_data directory contain the reference attenuation coefficient distributions of the target object.This dataset is well-suited for validating and testing transmission image reconstruction algorithms, particularly for research on sparse-angle reconstruction methods.