TroubleshootingDASTroubleshootingTroubleshoot
Troubleshoot ring-image artifacts
Work Figure 5.4-18 against a ring-image artifact on the Aquilion 16 to trace the fault — through the DAS/detector chain's temperature control, optical alignment, and channel-level electronics — down to one probable cause (source 2D201-065, §5.4, p.80).
Applies to
Aquilion 16 (TSX-101A) — data acquisition section (DAS), source volume 2D201-065, §5.4 ring-image fault-isolation flow (Figure 5.4-18, p.80). One of four image-artifact decision trees this chapter provides — see Related for the sibling streak-shower, shifted-CT-number, and SD flows.
Personnel
1 technician · Intermediate — CT image-artifact fault isolation on the DAS/detector chain: reading a temperature-controller display against a stated range, judging wedge/slit optical alignment, distinguishing a few-channel from a 24-channel-wide ring artifact, running a Converter-16 PWB swap test and reading whether the error channels moved, interpreting DCA offset/offset-SD and TEST-mode data checks, and escalating to a Converter-16 PWB, main detector, backplane PWB, thermal sensor, or thermoregulator/SSR/heater replacement (skill assessment derived from flow content — not an OEM-stated skill level).
Steps
18 steps
Source
2D201-065E*D p.80
Full step-by-step for Troubleshoot ring-image artifacts
All 18 steps are documented in the FSELIB Aquilion 16 (TSX-101A) service manual — re-authored, web-first, with the real figures from the source.
Open the full procedureRelated DAS guides
Acquire calibration data (NRA / air calibration)2 stepsCheck the DAS supply voltage (PCN1-PCN4)8 stepsRun the DCA offset data check (X-ray inhibit)7 stepsRun the DCA test-pattern check and read the Data Check menu3 stepsRun the DCA X-ray output check9 stepsDiagnose integrator-, gain-, and slice-thickness-dependent abnormalities4 steps
View all Aquilion 16 (TSX-101A) guidesSource: 2D201-065E*D p.80. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.