Image Interference / Environmental Artifacts — External signal or power noise degrading ultrasound image quality with no error code logged

Quick Answer

Image interference on GE Logiq 9, Logiq E9, Logiq E10, Vivid E95, Vivid E9, Vivid S70 — and most cart-based ultrasound systems — appears as on-screen artifacts with no associated error code in system logs. The most common cause: environmental electromagnetic interference (EMI) from improper grounding, missing shielding panels, or nearby equipment. Before swapping internal hardware, rule out external sources using the 4-step procedure below. For a systematic approach to distinguishing environmental artifacts from genuine hardware failure, see our ultrasound transducer failure modes and repair guide.

Symptoms

• Intermittent or persistent image artifacts (lines, noise bands, speckle patterns) with no error code logged
• Artifacts change or disappear when the system is moved to a different room or outlet
• Image quality degrades at specific times of day (coinciding with nearby equipment activation)
• Problem persists after swapping probes and verifying presets — ruling out transducer or user error

Common Causes

• Improper electrical grounding — system or wall outlet not properly grounded, or shielding panels left off after service
• Nearby electromagnetic sources — AM radio towers, WiFi routers, elevators, ventilators, CT/MRI suites in adjacent rooms
• Network-related noise — Ethernet cable acting as an antenna for conducted EMI
• Missing or loose internal shielding — some models require copper tape on the front-end processor shield panel per OEM tech note

How to Fix

1. Verify grounding and shielding. Confirm the system and wall outlet are properly grounded. Check that all external panels are installed — some panels are designed as EMI shields and their absence increases susceptibility to interference.¹
2. Investigate the environment. Identify recent changes near the system: new equipment, relocated WiFi routers, construction affecting building ground. Since ultrasound systems are cart-based, move the unit to a different outlet or room and test whether artifacts persist. Disconnect the Ethernet cable and any unnecessary peripherals to eliminate conducted noise paths.¹
3. Capture and compare the artifact. Take a still image or video clip of the interference pattern. Compare against known hardware failure signatures — channel board failures and transmit/receive board defects produce distinct, repeatable patterns, while environmental interference is typically intermittent and location-dependent. Check OEM technical notes: GE released a tech note for the Logiq 9 recommending copper tape on the front-end processor shield panel to suppress interference.¹
4. Escalate if unresolved. If artifacts persist after all environmental checks, consult a qualified service engineer familiar with the specific model. Environmental interference can mimic hardware faults — replacing internal boards without ruling out external causes leads to unnecessary downtime and cost. Contact a qualified GE service engineer if the issue remains after steps 1–3.¹

Need shielding panels, copper tape kits, or professional diagnostics? Search ultrasound parts and suppliers on MedTrade. If hardware damage is confirmed, our ultrasound transducer buying guide helps weigh repair costs against replacement.

Footnotes

1. Daniel Hoffman, "4 Steps to Solve Ultrasound Environmental Interference," Avante Health Solutions Knowledge Base, March 30, 2023, https://avantehs.com/learn/expert-advice/4-steps-solve-ultrasound-interference ↩ ↩² ↩³ ↩⁴