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What This Guide Helps With
Addresses degraded 2D images caused by positioning, obstruction, contamination, accessories, technique selection, detector conditions, motion, or external environmental factors.
Step-by-Step Troubleshooting
1. Protect the Patient and Avoid Unnecessary Exposure
Do not repeatedly expose a patient simply to troubleshoot poor image quality. If adequate imaging cannot be obtained without unnecessary repeat exposure, move the procedure to another verified imaging system.
Use a phantom or approved test object for technical evaluation whenever possible.
Expected outcome: Troubleshooting does not create unnecessary radiation exposure.
2. Define the Image-Quality Complaint
Determine whether the issue is:
- Excessive noise.
- Fixed artifact.
- Lines or bands.
- Uneven brightness.
- Blurring.
- Low contrast.
- Repeated artifact in the same detector location.
- Artifact that changes with C-arm position.
- Poor quality only in a particular imaging mode.
Save or review representative images when permitted.
Expected outcome: The image defect is characterized well enough to test logically.
3. Inspect the Imaging Path
Verify that nothing unintended is in the X-ray beam.
Look for:
- Table hardware.
- Positioning devices.
- Cables.
- Surgical equipment.
- Drapes with radiopaque components.
- Unnecessary accessories.
- Other objects between source and detector.
Expected outcome: The imaging field contains only intended anatomy or test material and required clinical equipment. If removal of an obstruction resolves the artifact, verify and stop.
4. Clean Accessible Imaging Surfaces
Inspect externally accessible detector covers and relevant surfaces for contamination, residue, adhesive, cleaning streaks, or debris.
Clean only according to approved facility and manufacturer-compatible practices.
Do not open the detector or remove protective assemblies.
Expected outcome: External contamination is not creating the visible artifact.
5. Verify Positioning and Geometry
Confirm the C-arm, detector, patient or phantom, and imaging target are positioned appropriately.
Check for:
- Excessive source-to-object spacing.
- Poor centering.
- Unintended angulation.
- Motion during acquisition.
- Equipment contacting or obstructing the detector.
- Positioning that forces unnecessary attenuation.
Expected outcome: Image geometry is appropriate and repeatable.
6. Review Operator-Accessible Imaging Settings
Confirm that the selected clinical protocol, imaging mode, dose/image-quality selection, and other operator-accessible settings are appropriate for the intended exam.
Compare with a known-good workflow or equivalent system when possible.
Do not alter calibration data or protected service parameters.
Expected outcome: An inappropriate user-level setting is ruled out or corrected. If image quality returns to normal, continue to verification.
7. Check for Patient or Object Motion
If images are blurred or inconsistent, determine whether motion is occurring from:
- Patient movement.
- Table movement.
- C-arm movement.
- Unsecured equipment.
- Movement during exposure.
For technical testing, use a stationary phantom to separate system performance from patient motion.
Expected outcome: Motion-related degradation is identified or ruled out.
8. Compare Images Across Positions or Modes
Acquire approved test images using a consistent phantom while varying only one external condition at a time.
Determine whether the artifact:
- Remains fixed.
- Changes with C-arm orientation.
- Appears only in one mode.
- Appears only after movement.
- Disappears after removing an accessory.
Expected outcome: The issue is narrowed to an external condition or shown to require service-level evaluation.
9. Perform Final Image-Quality Verification
After correcting an external cause, obtain repeat images using the same test object and comparable settings.
Verify:
- Expected image uniformity.
- No unexplained artifact.
- Acceptable visual noise for the selected operating condition.
- Stable image quality through repeated acquisitions.
- No new warnings.
Use approved quantitative image-quality testing when required by facility procedure.
Expected outcome: Image quality is consistently acceptable and the correction is verified. Troubleshooting can stop.
10. Escalate Persistent Image Defects
Remove the Cios Spin from service if unexplained artifacts, abnormal noise, nonuniformity, or other image-quality defects remain after external causes are ruled out.
Do not attempt detector calibration, generator calibration, internal adjustment, or protected service procedures without proper authorization and documentation.
Expected outcome: A system with potentially diagnostic image-quality degradation is not returned to clinical use.
If the Problem Persists
After imaging-path obstructions, contamination, positioning, motion, user-accessible settings, and accessories have been eliminated, remaining causes may involve detector calibration, X-ray generation, image processing, detector electronics, software, or service-level configuration.
The Cios Spin should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or bench/service evaluation.
- Evaluated using Siemens Healthineers documentation and approved image-quality test equipment.
- Repaired, calibrated, or configured only by qualified personnel.
Complete applicable image-quality, radiation, and functional testing before clinical return.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
Use a phantom rather than repeated patient exposures when determining whether poor image quality comes from the system or the clinical setup.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported a persistent dark artifact on Cios Spin 2D fluoroscopic images."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found adhesive residue on the exterior detector cover in the imaging field."
Resolution
What action was taken.
Example:
"The detector cover was cleaned using an approved method, repeat phantom images showed the artifact was gone, and image quality was verified before return to service."
Helpful Details to Include (If Known)
- Description of artifact.
- Imaging mode affected.
- Position or projection where it occurred.
- Imaging-path obstructions found.
- Detector surface condition.
- Clinical protocol or settings observed.
- Motion present or absent.
- Phantom comparison results.
- Whether artifact remained fixed.
- Before-and-after image results.
- Final device status.
Final Thought
Avoid unnecessary patient exposure, eliminate positioning and imaging-path causes first, verify corrections with a controlled test object, and escalate persistent image defects for qualified evaluation.
That is successful troubleshooting.