Siemens Healthineers Multix Impact

Image artifact, failed detector calibration, or poor image quality

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Asset Type

Radiographic System

Manufacturer

Siemens Healthineers

Model

Multix Impact

What This Guide Helps With

Troubleshooting image artifacts, poor image quality, detector calibration failures, and external setup issues before repair escalation.

Step-by-Step Troubleshooting

Ensure Patient Safety First

Confirm the Multix Impact is not actively being used for a patient exposure.

If poor image quality or artifact is noticed during an exam, have clinical staff stop using the room and move the patient to another available imaging room if repeat imaging is clinically needed.

Expected outcome: No patient receives unnecessary repeat exposure from a system with unresolved image quality concerns.

Confirm the Exact Image Quality Complaint

Ask the technologist what they are seeing and when it occurs.

Determine whether the issue involves:

Expected outcome: The issue is narrowed to detector, technique, grid, positioning, workstation processing, or calibration-related behavior.

Remove the Room from Clinical Use Until Image Quality Is Verified

Do not allow continued patient imaging until the artifact or calibration concern is evaluated.

Poor image quality can cause repeat exposures, missed anatomy, or questionable diagnostic images.

Expected outcome: The room remains controlled until Clinical Engineering and Radiology staff determine it is safe to return to use.

Check Whether the Artifact Appears on One Exam, One Body Part, or All Images

Review recent images with the technologist or imaging supervisor.

Compare whether the artifact appears:

Expected outcome: A single-image issue may suggest positioning or technique, while repeated artifacts suggest detector, grid, calibration, processing, or system fault.

Inspect the Detector Exterior

Remove the detector from use if safe and visually inspect it.

Check for:

Expected outcome: Detector damage or contamination is identified before assuming an internal failure.

If physical damage is found, stop troubleshooting, remove the detector from service, label it Out of Service, and send for repair evaluation.

Clean the Detector Surface if Contamination Is Present

If dust, contrast media, tape residue, body fluid, or cleaning residue is visible, clean the detector according to site-approved cleaning procedures.

Allow the detector surface to dry fully before retesting.

Expected outcome: Surface contamination is removed as a possible cause of artifact.

If this resolves the image artifact, verify image quality with Radiology staff and document the correction.

Check Detector Seating and Positioning

Confirm the detector is properly seated in the table Bucky, wall stand, or detector holder.

Make sure it is fully inserted, aligned, and not tilted, partially latched, or mispositioned.

Expected outcome: Detector position is correct and not creating cutoff, grid mismatch, or alignment-related image quality problems.

Check Grid Use and Grid Alignment

Confirm the correct grid is being used for the exam type and detector location.

Look for signs of grid misalignment, wrong grid selection, or grid cutoff, especially if the complaint involves density variation, lines, or poor exposure uniformity.

Expected outcome: Grid-related artifact is ruled out before suspecting detector failure.

Confirm the Correct Exam Protocol and Technique Were Used

Ask the technologist to confirm the selected exam protocol, patient size setting, detector selection, AEC use, and exposure technique.

Incorrect protocol or technique can cause poor contrast, excessive noise, underexposure, overexposure, or failed image appearance that may look like equipment failure.

Expected outcome: User setup and technique selection are verified before deeper troubleshooting.

Check AEC Chamber Selection and Positioning

If the issue involves inconsistent brightness, poor exposure, or repeat images, verify that the appropriate AEC chamber was selected and that anatomy was properly centered over the selected chamber.

Expected outcome: Exposure control issues caused by positioning or chamber selection are ruled out.

Check Collimation and SID

Verify that collimation, source-to-image distance, tube position, and detector alignment match the selected exam.

Misalignment can cause cutoff, poor exposure response, anatomy clipping, or image processing problems.

Expected outcome: Tube, detector, and patient positioning are confirmed as reasonable for the exam.

Verify the Issue With a Controlled Test Image

Coordinate with Radiology staff to perform a non-patient test exposure using an approved phantom or site test object if available.

Do not perform unnecessary exposures in an occupied room or around unprotected staff.

Expected outcome: The artifact can be confirmed under controlled conditions without exposing a patient.

Compare Table, Wall Stand, and Free Detector Use

If the Multix Impact uses different detector positions, test whether the issue occurs in one location or all locations.

For example:

Expected outcome: The issue is narrowed to detector, Bucky/grid, stand, workstation processing, or system-wide image chain.

Try a Known-Good Detector if Available

If the site has another compatible detector and it is safe to test, use a known-good detector under the same general setup.

Expected outcome: If the artifact follows one detector, the detector is suspect. If the artifact remains with multiple detectors, the issue may involve calibration, grid, generator, workstation processing, or system electronics.

Check Detector Battery and Wireless Status if Applicable

For wireless detector use, verify the detector battery is adequately charged and the detector is connected to the system.

A weak battery or unstable wireless connection may cause detector readiness issues, transfer errors, or incomplete image acquisition.

Expected outcome: Detector power and communication are stable before calibration or image quality testing continues.

Check Workstation Image Processing Settings

Confirm that the image is not being affected by incorrect processing, window/level adjustment, wrong exam protocol, incorrect patient size setting, or post-processing presets.

Compare the raw or original image appearance if available through normal clinical workflow.

Expected outcome: Display or processing settings are ruled out as the source of the poor image quality complaint.

Review Calibration or Detector Correction Error Messages

If calibration failed, record the exact message, detector involved, time of failure, and whether the failure occurred during offset, gain, flat-field, or detector correction workflow.

Do not repeatedly attempt calibration without understanding the failure pattern, because repeated failures may indicate a detector, exposure, setup, or system issue.

Expected outcome: The calibration failure is documented clearly for repair escalation if needed.

Confirm Calibration Setup Conditions

If site policy allows Clinical Engineering to support detector calibration setup, verify only external setup items:

Expected outcome: Calibration is not failing due to obvious setup or environmental issues.

Restart the Workstation Only When Safe

If the issue appears related to image processing, calibration software lockup, or detector communication, coordinate with Radiology staff before restarting the workstation or system.

Confirm no active patient study, unsent image, or pending exam would be interrupted.

Expected outcome: Temporary software or communication issues are cleared without risking patient data loss.

Check for Environmental or Interference Sources

Look around the room for new equipment, portable electronics, damaged cables, loose covers, or anything recently changed near the detector, table, wall stand, generator area, or workstation.

For wireless detectors, consider whether new wireless interference or room changes occurred around the time the issue started.

Expected outcome: External environmental causes are considered before assuming hardware failure.

Review Recent Service, Drops, or Room Changes

Ask whether the detector was dropped, the room was recently cleaned, accessories were changed, software was updated, or the table/wall stand was serviced.

Expected outcome: The issue is tied to a recent event if possible, which helps guide repair escalation.

Verify Image Quality With Radiology Before Returning to Service

If an external cause is corrected, have qualified Radiology staff review a test image or appropriate QA image according to site policy.

Expected outcome: The system is returned to clinical use only after image quality is acceptable.

If the issue is resolved, document the findings and stop.

If the Problem Persists

If the artifact, failed detector calibration, or poor image quality remains after checking detector condition, surface cleanliness, positioning, grid use, technique, AEC selection, workstation settings, and basic communication status, the common external causes have been ruled out.

The issue may involve an internal detector fault, calibration file problem, image processing issue, generator output problem, grid/Bucky issue, workstation fault, or system-level imaging chain failure.

The device or affected detector should be:

Knowing when to stop is proper troubleshooting. Do not continue repeated exposures or calibration attempts when image quality remains questionable.

Clinical Use Tip

Do not troubleshoot image quality concerns on an active patient. If the image may be diagnostically unreliable, move the patient to another imaging room before continuing testing. Patient safety includes avoiding unnecessary repeat radiation exposure and preventing questionable images from being used clinically.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"Radiology reported repeated line artifact and poor image quality on Multix Impact table images."

Cause

What was observed during troubleshooting.

Example:
"Clinical Engineering found the artifact persisted after detector cleaning, detector reseating, grid check, and controlled test imaging."

Resolution

What action was taken.

Example:
"Removed the affected detector/system from service, labeled it Out of Service, documented test conditions and artifact behavior, and escalated for Siemens service evaluation."

Helpful Details to Include (If Known)

Final Thought

Image quality troubleshooting should move from patient safety to simple external checks before repair escalation. On a radiographic system, detector condition, positioning, grid use, technique, AEC selection, calibration setup, and workstation processing should all be considered before assuming internal failure. Clear documentation protects patients, supports Radiology workflow, and gives service personnel the details needed to resolve the problem efficiently.

That is successful troubleshooting.

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