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Home›Blog ›Real-World Case Study: NK5761-TA Power Supply Replacement for Thales TH9464 6” Image Intensifier

Real-World Case Study: NK5761-TA Power Supply Replacement for Thales TH9464 6” Image Intensifier

Introduction: A Failing System, Rising Costs

A mid-sized diagnostic imaging clinic in Northern China faced a critical issue: its 6-inch Thales Thomson TH9464 image intensifier unit, a core component of their mobile C-arm system, was producing grainy, unstable X-ray images. The root cause? A failing original high-voltage power supply.
With the original Thales replacement unit out of production and third-party repairs costing over $2,000 with 8-week lead times, the clinic needed a fast, reliable, and budget-friendly solution to avoid disrupting patient care.
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Challenge: Restoring Image Intensifier Functionality

The clinic’s C-arm system relied on the TH9464 image intensifier for clear, real-time fluoroscopy during orthopedic and pain management procedures. Key challenges included:
  1. Degraded Image Quality: Voltage fluctuations from the failing power supply caused inconsistent brightness and definition.
  2. High Downtime Risk: Long lead times for OEM replacements threatened to halt procedures.
  3. Compatibility Concerns: Finding a replacement that matched the TH9464’s electrical specs, physical footprint, and installation requirements.
The clinic’s biomedical engineering team selected the NK5761-TA power supply, a direct drop-in replacement designed for the TH9464 6-inch image intensifier. Key reasons for the choice:
  • Full Compatibility: Identical dimensions, mounting points, and electrical specifications to the original Thales unit.
  • Adjustable Output: U1/U2 ports allow fine-tuning voltage to optimize image definition, a critical feature for fluoroscopy.
  • High-Voltage Stability: HV port output up to 25kV, with U5 (30±2kV) and U4 (1.5–3.5kV) outputs matching the TH9464’s requirements.
  • Fast Availability: Stock units with 3-day delivery, eliminating lengthy lead times.

Implementation & Installation

Installation was completed in under 2 hours by the clinic’s in-house biomedical engineer, following the manufacturer’s guidelines:
  1. Safety checks: Disconnected power, discharged residual voltage, and cleaned high-voltage cable terminals with alcohol to prevent arcing.
  2. Drop-in fit: The NK5761-TA aligned perfectly with the original mounting holes, requiring no modifications to the C-arm’s cabinet.
  3. Calibration: Adjusted U1/U2 voltages to match the clinic’s preferred image brightness levels, resolving the previous graininess.
  4. Testing: Ran a full system check, including fluoroscopy test phantoms, to confirm stable output and clear images.

Results: Immediate Improvements & Long-Term Reliability

Within days of installation, the clinic reported significant improvements:
  • Restored Image Quality: Stable high-voltage output eliminated brightness fluctuations, producing sharp, consistent fluoroscopy images.
  • Zero Downtime: Procedures resumed as scheduled, with no cancellations or delays.
  • Cost Savings: The NK5761-TA cost 60% less than the OEM replacement, with a 2-year warranty vs. 90 days for repairs.
  • Long-Term Performance: Over 12 months of continuous use, the power supply has maintained consistent voltage levels, with no signs of degradation. The clinic’s engineer noted, “It performs exactly like the original unit did when new, at a fraction of the cost.”

Conclusion: A Proven Alternative for Medical Imaging Facilities

This case study demonstrates that the NK5761-TA power supply is a reliable, cost-effective solution for facilities with failing Thales TH9464 image intensifiers. It addresses the core pain points of high replacement costs, long lead times, and compatibility risks, allowing clinics to extend the life of their existing C-arm systems without compromising patient care.
For medical imaging facilities facing similar issues with aging Thales image intensifiers, the NK5761-TA offers a straightforward, drop-in upgrade that delivers OEM-level performance at a lower cost.

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