If you do not have an open filament in the tube then the most likely problem is the "ice cube" relay on the backplane of the OBC. It is hidden under a cover but this filament select relay (K-24 I think) is usually the problem.
This is why Eric Smith is a pillar in the Ct community... Like he said pull the candle stick out and measure if it reads good on small and large then your relay is bad or stuck. You nailed this one Eric good job you must teach this stuff...kudos
Eric is correct. It is easy to check the tube filament. Remove the cathode cable from the tank leaving the other end inserted into the tube. Use and Ohmeter and measure C-L and C-S. If either is open the tube is defective.
dear angela
in this case it could be just the large filament is open.
before doing any check i recommend to try scanning with small filament (small focal spot)
Hello Angela,
It seems that one of the filament of tube is open. Try to do 02 nos. of scan one at 120KV, 40 ma and another at 120KV, 250ma. If any of one scan pass then its confirmed that one of the filament is open but still you can use another filament.
If u can scan on 120OV , 40 ma technique then your small filament is ok and same if your scan passes on 120 KV 250 ma then you large filament is ok and small filament blown. But it think most of the tube warm up scans are done on large filament so if large filament is ok then carry on 120 KV and 250 ma technique.
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marivic
CTI system errors. HELP!
May 16, 2013 12:01
The following errors occured:
Suite: CT01 Host: OBC Proc: Generator Error: 183121
Function: XRAY GENERATION : Filament Selection
FIL/MA fault detected: Open Filament circuit.
Desired focal spot=0. (0 = large, 1 = small)
Fault latch address = ffdf43 hex, Bit = D7
Suite: CT01 Host: OBC Proc: Generator Error:183296
Function: no system function reported
Selected technic:80kV,50mA, 0%MOD,backup timer 10499
VarmA:(index:start 0,skip 0,last 0) Last Cmd 50mA
Monitoring:(Measured 0.0mA vs ref 50mA)
0 total samples, tube spit Ctr 0
Please help guys. Thanks!
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Eric Smith
re: CTI system errors. HELP!
May 16, 2013 06:46
If you do not have an open filament in the tube then the most likely problem is the "ice cube" relay on the backplane of the OBC. It is hidden under a cover but this filament select relay (K-24 I think) is usually the problem.
Eric Smith
SOS Medical Imaging, Inc.
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Dean Kenney
re: re: CTI system errors. HELP!
May 17, 2013 07:28
This is why Eric Smith is a pillar in the Ct community... Like he said pull the candle stick out and measure if it reads good on small and large then your relay is bad or stuck. You nailed this one Eric good job you must teach this stuff...kudos
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Kim Schofield
re: re: CTI system errors. HELP!
May 17, 2013 07:29
Eric is correct. It is easy to check the tube filament. Remove the cathode cable from the tank leaving the other end inserted into the tube. Use and Ohmeter and measure C-L and C-S. If either is open the tube is defective.
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Julio c. Gomez
re: CTI system errors. HELP!
May 17, 2013 07:27
smell like cathode problem...
but check the ma loop.
luck
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Borhan Kalash
re: CTI system errors. HELP!
May 17, 2013 07:28
dear angela
in this case it could be just the large filament is open.
before doing any check i recommend to try scanning with small filament (small focal spot)
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Deepak Roy Sharma
re: CTI system errors. HELP!
May 17, 2013 07:29
Hello Angela,
It seems that one of the filament of tube is open. Try to do 02 nos. of scan one at 120KV, 40 ma and another at 120KV, 250ma. If any of one scan pass then its confirmed that one of the filament is open but still you can use another filament.
Deepak
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salman khan
re: re: CTI system errors. HELP!
May 18, 2013 10:43
yeah agree with deepak
If u can scan on 120OV , 40 ma technique then your small filament is ok and same if your scan passes on 120 KV 250 ma then you large filament is ok and small filament blown. But it think most of the tube warm up scans are done on large filament so if large filament is ok then carry on 120 KV and 250 ma technique.
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Dean Kenney
re: re: re: CTI system errors. HELP!
May 19, 2013 07:38
You guys come on there is a relay that controls this... Do not step over a dollar to pick up a dime
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Eric Smith
re: CTI system errors. HELP!
May 20, 2013 09:35
Please let us know what you found...
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