Scanning aborts with collimator filter homing problem

Symptom

Error message

Error: 260003141 Filter homing problem. See the Long Description for the full error code Fri Mar 4 21:22:12 2005 Host : Collimator Ermes # : 260003141 Exception Class : Abort Severity : Primary File : filter_home.c Line# : 147 Function : No System Function Reported Scan Type : None/Unknown Scan: 13155/1/0 Filter homing problem.

Error: 260003116 Filter drive tracking detected no motion when motion was requested. See long description for sample error. Fri Sep 14 10:15:52 2007 Error: 260003116 Host: orp Process: orp subsys File: ccb drive timers.c Line: 504 Fri Sep 14 10:15:51 2007 Host : Collimator Ermes # : 260003116 Exception Class : Abort Severity : Primary File : ccb drive timers.c Line# : 504 Function : No System Function Reported Scan Type : Helical Scan: 8516/3/20 Filter drive tracking detected no motion when motion was requested. Verify operation of stepper motor and encoder feedback Start Position = 41999um 39697cnt Desired Position = 0um 0cnt Current Motor Position = 40415um 38200cnt Current Encoder Position= 41998um 39696cnt

Applies to

Models

LightSpeed

Product

LightSpeed RT4 WB O G4 G HPT WB O M4 G HPT LightSpeed RT4 with GRE and MDAS4 or GDAS4 gantry At GE Medical Systems, we’re pioneering exciting CT technology for Radiation Therapy planning. Introducing the newest addition to our LightSpeed® series – LightSpeed RT, the first multi-slice, wide-bore CT scanner with the largest field of view in the industry. With a generous 80 cm gantry opening, the LightSpeed RT bore is 10 cm larger than conventional scanners. This provides complete flexibility for patient positioning freedom – even for the most demanding oncology needs. And the 65 cm variable field of view delivers 15 additional centimeters of visual coverage, allowing clinicians to see a patient’s entire anatomy for precise radiation therapy planning. Position and precision Thin, multi-slice imaging is the extra bonus – enabling respiratory gating, providing precise target delineation and delivering higher resolution digitally reconstructed radiographs (DRRs) than ever before. All adding up to the ability for you to deliver what really matters most – better cancer care for your patients. Plus, the LightSpeed RT scanner is available with the Exact™ couch insert, enabling you to consistently replicate patient immobilization for treatment. With LightSpeed RT, the future of your Radiation Oncology department is wide open. Links to the Product Service Manuals, FMIs, Service Notes, Option Manuals and Operator Documents can be found online at the attached sites. Always use the most appropriate documentation for your system.

Component

5140001-4 helios 4 collimator with notched filler bar and rating plate used on 5.X scanners. See Long Description for Details. Part #: 5140001-4 Part Type: GP REPAIRABLES Part Weight: 2.20 LBR Repairable: Yes Returnable: Yes Hazardous Material: N Description: helios 4 collimator with notched filler bar and rating plate FRU: Yes Status: Orderable Comments: Added by ECR 2013518 as ms13452 050428 **FE Assist** Used on H-power - main difference is the mount holes are larger to accommodate for larger bolts to hold the added weight of the Hercules Tube. 5140001-4 is also used on HP-60 s . 514001-4 is not backwards compatible.(12/5/06 212001261) *** 2ND OPINION NOTES *** Replacing for artifacts? Look into collimator with bright light. Any particulate? Look at plastic over copper filter, any distortion or yellowing? Bow tie filter ok? There are several lower level FRUs. Ensure that one of the lower level FRUs could not fix the problem.

Area

CT

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