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What This Guide Helps With
Troubleshooting poor image quality caused by positioning, display, cable, image intensifier, camera, or external setup issues.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
Do not troubleshoot image quality problems during an active procedure unless clinical staff confirm it is safe.
Action:
- Confirm whether the C-arm is actively being used on a patient.
- If image quality is affecting clinical decision-making, have staff switch to another imaging system if available.
- Do not continue using the unit clinically if anatomy, instruments, contrast, or landmarks cannot be clearly visualized.
Expected outcome: Patient care is protected before technical troubleshooting begins.
Why it matters: Poor image quality can lead to missed anatomy, incorrect positioning, longer procedure time, or unnecessary radiation exposure.
2. Verify the Reported Image Quality Problem
Ask the user to describe the issue clearly.
Action:
- Determine whether the complaint is:
- Blurred image
- Dark or washed-out image
- Noisy or grainy image
- Image lag
- Artifacts
- Poor contrast
- Shading or uneven brightness
- Distorted image
- Camera/I.I. alignment concern
- Image only poor on one monitor
Expected outcome: The symptom is clearly identified before parts or internal failures are assumed.
If the image problem is not present during testing, document that the issue could not be duplicated and ask staff what mode, position, or procedure type was being used.
3. Check Monitor Display and Viewing Conditions
Confirm the issue is not only a display problem.
Action:
- Check both monitors if the system has dual displays.
- Verify brightness and contrast settings are reasonable.
- Look for one monitor appearing worse than the other.
- Check for loose monitor video cables, damaged connectors, or obvious display defects.
Expected outcome: The image should appear similar on both displays.
If only one monitor is affected, troubleshoot the monitor or video path before suspecting the image intensifier or camera.
If correcting monitor settings or cabling resolves the issue, return the unit to service and stop.
4. Inspect the C-Arm Positioning and Field of View
Poor positioning can look like an imaging failure.
Action:
- Confirm the anatomy or test object is centered in the image field.
- Check that the image intensifier is not too far from the object.
- Verify the X-ray tube and image intensifier are properly aligned.
- Remove unnecessary objects from the beam path.
Expected outcome: The test object should appear centered, stable, and reasonably sharp.
If repositioning improves the image, the issue was likely setup-related. Return the unit to service if image quality is acceptable.
5. Check for Objects or Materials in the Beam Path
External items can cause artifacts or poor contrast.
Action:
- Look for:
- Metal objects
- Lead shielding
- Table rails
- Thick mattress pads
- Surgical instruments
- Cables crossing the field
- Positioning devices
Expected outcome: Removing unnecessary material should improve image clarity and contrast.
If the image improves after clearing the beam path, document the cause and stop.
6. Test Image Quality With a Simple Known Object
Use a controlled test to separate clinical setup issues from equipment issues.
Action:
- Place a known object or approved image quality test tool in the field.
- Acquire an image using normal fluoroscopy settings.
- Compare the image to expected appearance for sharpness, brightness, contrast, and artifacts.
Expected outcome: A simple test object should produce a clear and stable image.
If the test image is good, the issue may have been patient size, positioning, technique, or procedure setup.
7. Check Imaging Mode and Dose Settings
Incorrect imaging mode can make the image look poor.
Action:
- Verify the selected imaging mode is appropriate.
- Check whether low-dose fluoro, pulsed fluoro, snapshot, or another mode is selected.
- Confirm clinical staff are not expecting high-detail imaging while the unit is in a lower-dose mode.
Expected outcome: Image quality should match the selected mode.
If changing to an appropriate mode resolves the complaint, document the setting issue and return the unit to service.
8. Check Automatic Brightness or Exposure Behavior
Automatic exposure control problems can appear as dark, bright, or unstable images.
Action:
- Observe whether image brightness adjusts normally when the field changes.
- Move a test object into and out of the field while watching the image response.
- Look for brightness pumping, delayed adjustment, or failure to compensate.
Expected outcome: The system should adjust image brightness smoothly and predictably.
If brightness control is unstable or does not respond, remove the unit from service for further evaluation.
9. Inspect the Image Intensifier Face and External Covers
External contamination or damage can affect image appearance.
Action:
- Inspect the image intensifier input area for visible debris, cracks, fluid, residue, or damage.
- Check for physical impact damage to the C-arm head or image intensifier housing.
- Do not remove covers or open the image intensifier assembly during floor troubleshooting.
Expected outcome: The image intensifier area should be clean, intact, and free of obvious damage.
If contamination is present, clean according to facility-approved procedures. If damage is present, remove the unit from service.
10. Check Cable Connections Between the C-Arm and Workstation
A poor connection can cause noisy, intermittent, or distorted images.
Action:
- Inspect external video, control, and system cables between the C-arm and monitor/workstation cart if applicable.
- Check for loose connectors, damaged cable jackets, bent pins, stretched cables, or strain at connection points.
- Reseat accessible external connectors only if safe and allowed by local procedure.
Expected outcome: Cables should be secure, undamaged, and properly connected.
If reseating a cable resolves the issue, perform functional testing before returning the unit to service.
11. Check for Intermittent Image Changes With Movement
C-arm movement can reveal cable or connection issues.
Action:
- While imaging a test object, carefully move the C-arm through common positions.
- Observe whether the image flickers, distorts, drops out, becomes noisy, or changes brightness.
- Do not force movement or continue testing if cables appear strained.
Expected outcome: Image quality should remain stable through normal positioning.
If image quality changes with movement, suspect cable strain, connector issue, or internal connection problem. Remove from service for bench or vendor evaluation.
12. Check for Error Messages or System Warnings
Image quality issues may be accompanied by system messages.
Action:
- Review the system display for warnings, camera errors, generator errors, imaging chain faults, or startup messages.
- Record the exact wording of any message.
- Power cycle the system only if it is not in active clinical use and it is safe to do so.
Expected outcome: No active imaging-related errors should remain after startup.
If errors return, remove the unit from service and escalate.
13. Perform a Basic Functional Imaging Check
Confirm the system can produce a usable image under controlled conditions.
Action:
- Use a known test object.
- Verify:
- Image appears centered
- Brightness is acceptable
- Contrast is acceptable
- No major artifacts are present
- Image is stable
- Both monitors display correctly
- Image storage or transfer works if part of the complaint
Expected outcome: The BV Pulsera should produce a stable and clinically usable image.
If image quality remains poor after external checks, do not continue clinical use.
If the Problem Persists
If image quality remains poor after checking setup, displays, positioning, beam path, imaging mode, external cables, and basic functional imaging, common external causes have been ruled out.
The issue may involve the image intensifier, camera, imaging chain, video processing, generator behavior, internal cabling, or calibration-related service needs.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair, bench evaluation, or vendor service
Knowing when to stop is proper troubleshooting. Do not attempt deep internal disassembly, image chain calibration, or board-level repair unless you are trained, authorized, and have the proper service documentation and test equipment.
Clinical Use Tip
Do not troubleshoot image quality on an active patient unless the procedure team confirms it is safe. If image quality could affect clinical decisions, move to another C-arm or imaging method before continuing. Protect therapy continuity and patient care before continuing technical troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported poor image quality on the Philips BV Pulsera, with the fluoroscopy image appearing blurry and low contrast during setup."
Cause
What was observed during troubleshooting.
Example:
"External checks found the image intensifier positioned too far from the test object and a metal table rail partially in the beam path."
Resolution
What action was taken.
Example:
"Repositioned the C-arm, cleared the beam path, verified acceptable image quality on both monitors, and returned the unit to service."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Outlet tested
- System powered on normally
- Startup errors present or absent
- Image quality symptom observed
- Fluoro mode used
- Dose mode or imaging mode selected
- Both monitors checked
- Monitor brightness and contrast checked
- Cables inspected or reseated
- C-arm position tested
- Beam path checked for obstructions
- Artifacts, distortion, lag, or noise observed
- Image changes during C-arm movement
- Unusual sounds, heat, odor, or physical damage
- Final device status
Final Thought
Image quality troubleshooting on a C-arm should always start with patient safety and simple external causes. Positioning, beam path obstruction, monitor settings, mode selection, and cabling can all mimic deeper image intensifier or camera failures. Once those causes are ruled out, escalation is the correct next step. Clear CCR documentation helps the next technician or vendor understand exactly what was tested and what was found.
That is successful troubleshooting.