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Elucid raises $55M Series D with FFR-CT 510(k) under FDA review Enovis to buy eCential Robotics for 155 million euros FDA authorizes Vitestro's Aletta, the first autonomous blood-drawing robot, five months after a $70M Series B Renata Medical raises $25M Series D to scale the Minima pediatric stent FDA opens a docket on how to regulate generative AI devices FDA clears Jupiter Endovascular's Vertex thrombectomy system for pulmonary embolism in 89 days FDA clears Wandercraft's Eve, the first self-balancing exoskeleton for home use Meduloc raises $4M Series B to start alpha launch of its nitinol fracture implant FDA sets FY2027 device user fees: $28,653 for a 510(k), $13,785 to register Elucid raises $55M Series D with FFR-CT 510(k) under FDA review Enovis to buy eCential Robotics for 155 million euros FDA authorizes Vitestro's Aletta, the first autonomous blood-drawing robot, five months after a $70M Series B Renata Medical raises $25M Series D to scale the Minima pediatric stent FDA opens a docket on how to regulate generative AI devices FDA clears Jupiter Endovascular's Vertex thrombectomy system for pulmonary embolism in 89 days FDA clears Wandercraft's Eve, the first self-balancing exoskeleton for home use Meduloc raises $4M Series B to start alpha launch of its nitinol fracture implant FDA sets FY2027 device user fees: $28,653 for a 510(k), $13,785 to register

The Tracker / January 2026 / K252977

510(k) cleared

Halcyon, Ethos Radiotherapy System (5.0)

Varian Medical Systems, Inc. · Jan 21, 2026 · K252977

FDA cleared the Halcyon, Ethos Radiotherapy System (5.0) from Varian Medical Systems, Inc. on Jan 21, 2026 under K252977, a traditional 510(k). The device falls under product code IYE, Accelerator, Linear, Medical, regulated at 21 CFR 892.5050 as a Class 2 device. The review panel was Radiology.

FDA logged the submission as received on Sep 17, 2025. The decision came 126 days later, longer than the 90 FDA-day review goal, which usually means at least one additional information request.

Varian Medical Systems, Inc. has 8 other decisions in the tracker over the last 12 months: K261856 (Halcyon, Ethos Radiotherapy System (5.0)), K261306 (AI Contouring (VA10A)), K260750 (Virtual Cone (1.0)), K253026 (Respiratory Gating for Scanners (2.1)).

Questions & Answers

What did FDA clear under K252977?

K252977 is the FDA 510(k) for Halcyon, Ethos Radiotherapy System (5.0), submitted by Varian Medical Systems, Inc.. FDA's decision date was Jan 21, 2026, under product code IYE (Accelerator, Linear, Medical).

Who makes the Halcyon, Ethos Radiotherapy System (5.0)?

Varian Medical Systems, Inc., based in Palo Alto, CA, is the applicant of record for K252977.

How long did the K252977 review take?

FDA received the submission on Sep 17, 2025 and issued its decision on Jan 21, 2026, 126 days later.

← All decisions in January 2026