A magnetically controlled instrument was successfully navigated within blood vessels to reach brain aneurysms in two patients last week. Dr. Christopher Moran, a neuroradiologist at Washington University in St. Louis, performed the procedures at Barnes-Jewish Hospital, also in St. Louis.
The technology, approved by the FDA for use in clinical trials under an investigational device exemption, was developed by Stereotaxis, a St. Louis-based company. The system permits the magnetic navigation system, under the guidance of a physician, to steer a catheter-type instrument, via the distal tip, along various trajectories within the body
This is the third clinical trial for the magnetic navigation system, according to Stereotaxis. The first trial, in 1998, used the device to conduct biopsies in neurosurgery. The second trial is in progress, and involves using the system to navigate the heart to locate the source of cardiac arrhythmias.
By AuntMinnie.com staff writersApril 16, 2001
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Computer-controlled catheter navigation system begins clinical trials, January 26, 2001
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![Representative example of a 16-year-old male patient with underlying X-linked adrenoleukodystrophy. (A, B) Paired anteroposterior (AP) chest radiograph and dual-energy x-ray absorptiometry (DXA) report shows lumbar spine (L1 through L4) areal bone mineral density (BMD). The DXA report was reformatted for anonymization and improved readability. The patient had low BMD (Z score ≤ −2.0). (C) Model (chest radiography [CXR]–BMD) output shows the predicted raw BMD and Z score in comparison with the DXA reference standard, together with interpretability analyses using Shapley additive explanations (SHAP) and gradient-weighted class activation maps. The patient was classified as having low BMD, consistent with the reference standard. AM = age-matched, DEXA = dual-energy x-ray absorptiometry, RM2 = room 2, SNUH = Seoul National University Hospital, YA = young adult.](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/04/ai-children-bone-density.0snnf2EJjr.jpg?auto=format%2Ccompress&dpr=2&fit=crop&h=167&q=70&w=250)
