Blurry X-ray images can result from several factors, and it's important to evaluate each possibility to pinpoint the issue. Here are some common causes and potential solutions:

1. Motion Blur: Movement of the sensor or patient during exposure can lead to blurry images. Ensure the sensor is securely positioned and the patient is comfortable to prevent involuntary movements.

2. X-Ray Tube Performance: Aging X-ray tubes can degrade, reducing image sharpness. If the blurriness increases at higher exposure settings, it might indicate focal spot performance issues. Testing the tube's performance can help determine if it requires recalibration or replacement.

3. Calibration Issues: Misalignment or drift in calibration can cause blurry images. Recalibrating the system might improve image sharpness.

4. Electrical Noise or Grounding Issues: Electrical interference can also reduce image clarity. Ensuring proper grounding might resolve the issue.

5. Monitor or Display Issues: If the blur is consistent across different monitors, it might be an issue with the imaging chain rather than the display. However, aging LCD panels can also affect image sharpness.

Given these possibilities, I recommend performing a thorough check of the hardware and calibration settings. If the issue persists, consulting with a technical support specialist for your X-ray unit might be necessary to conduct specific performance tests and address any underlying problems.