{
  "id": 4992059,
  "title": "3D ultrasound fascicle tractography for objective muscle architecture analysis.",
  "url": "https://urgent.news/2026/09/01/3d-ultrasound-fascicle-tractography-for-objective-muscle-architecture",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-01T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.31.746736v1?rss=1"
  },
  "original_language": "en",
  "account": "Muscle architecture plays a crucial role in muscle function, and its three-dimensional (3D) structure varies throughout life due to factors such as growth, training, and disease. However, measuring 3D muscle architecture directly in living patients is a complex task. Researchers have now developed a novel hybrid approach to accurately reconstruct 3D muscle fascicles using freehand ultrasound data in a coordinate system anchored by the muscle's central aponeurosis. This method combines Hessian-based fascicle detection with wavelet-based refinement to generate precise volumetric fascicle orientations.\n\nIn a controlled synthetic dataset with pre-determined ground truth, the researchers were able to estimate fascicle orientations and lengths with high accuracy, within 2 degrees and approximately 1.5% respectively. When tested on living subjects, this technique successfully identified the expected fascicle lengthening in the human tibialis anterior following passive plantar flexion rotation, a movement that is not detected by traditional diffusion tensor imaging of the same muscle. The proposed hybrid fascicle tractography technique offers a practical, non-invasive, and anatomically relevant solution for quantifying 3D muscle architecture in vivo, paving the way for important advancements in both clinical and applied muscle physiology research.",
  "summary": "Muscle architecture shapes muscle function and changes with age, growth, training and disease, yet quantifying three-dimensional (3D) muscle architecture in vivo remains challenging. We introduce a hybrid fascicle tractography approach for freehand 3D ultrasound data that accurately reconstructs 3D muscle fascicles with respect to an objective, anatomically relevant coordinate system defined by…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}