ALS is a progressive disease that affects nerve cells in the brain and spinal cord. Unlike many other conditions, there is no single test to provide a definitive diagnosis. Instead, doctors use a "diagnosis by exclusion" method, combined with specific imaging markers found in files like those contained in an "ALS SCAN" archive. Key Imaging Modalities Found in ALS Data
| Sequence | What It Shows | Typical ALS Findings | |----------|---------------|----------------------| | | Grey‑matter volume, cortical thickness | Focal atrophy of the precentral gyrus; “knife‑edge” sulci. | | T2‑weighted / FLAIR | Hyperintensity (edema, gliosis) | Hyperintense CST signal (often subtle). | | Susceptibility‑Weighted Imaging (SWI) | Iron deposition | Increased iron in the motor cortex & deep nuclei. |
In geospatial and environmental sciences, "ALS" stands for Airborne Laser Scanning (LiDAR). A file in this category likely contains: Point Cloud Data