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Technical Discussions
Mithilaj
Other, Technical Sales
FUJIFILM, United Arab Emirates (UAE), Joined Mar 2016, 4

Mithilaj

Other, Technical Sales
FUJIFILM,
United Arab Emirates (UAE),
Joined Mar 2016
4
10:52 Mar-22-2016
Artifact identification on Films
zoom image



zoom image



Hello valued members and experts,

May I ask, if any one have an idea what could be the cause for such formation on the film. The customer used this on a vessel weld inspection. And found this occur only in certain cases, but not a continued occurance.

The phenomena is parallel to the weld and is also some time visible on reflected light on film surface. But there is no scratch marks on film. The Leadpacks used also seems to have no isuues.

Would any of you share your observation on the same and advise the possible cause.

Appreciate your help & support.

Thanks

 
 Reply 
 
N.B. Rengaraju
NDT Inspector, NDT Level-III/Radiation Safety Officer(RSO)
Marine and Heavy Engineering Company, MALAYSIA., India, Joined Sep 2014, 106

N.B. Rengaraju

NDT Inspector, NDT Level-III/Radiation Safety Officer(RSO)
Marine and Heavy Engineering Company, MALAYSIA.,
India,
Joined Sep 2014
106
13:20 Mar-22-2016
Re: Artifact identification on Films
In Reply to Mithilaj at 10:52 Mar-22-2016 (Opening).

As you confirm lead packs are fine, this could e due to usage of stale/contaminated processing chemicals. Change the processing chemicals and see. Give a feed back.

 
 Reply 
 
Gerald R. Reams
Engineering,
Industry, USA, Joined Aug 2012, 181

Gerald R. Reams

Engineering,
Industry,
USA,
Joined Aug 2012
181
13:50 Mar-22-2016
Re: Artifact identification on Films
In Reply to Mithilaj at 10:52 Mar-22-2016 (Opening).

These are scratches/gouges in your lead screens. If you look closely, there is darker density lines in the center of the lighter density areas. This is caused by the lead being gouge (thinner) and being deposited along the sides (thicker).

 
 Reply 
 
Volodymyr
Engineering, Deputy Director for Technical Issues/Head of Testing Laboratory/Chief of department/NDT
Joint Stock Company, Portugal, Joined Mar 2016, 25

Volodymyr

Engineering, Deputy Director for Technical Issues/Head of Testing Laboratory/Chief of department/NDT
Joint Stock Company,
Portugal,
Joined Mar 2016
25
14:52 Mar-22-2016
Re: Artifact identification on Films
In Reply to Mithilaj at 10:52 Mar-22-2016 (Opening).

zoom image



If this X-ray inspection with a fluorescent screen,
it cracks in the scintillation layer. If lead screens I don't quite to sure,
there is similar scratches, isn't it?
(Direction of imaginary pollution can not be similar.
Thickness of pollution will be to big, picture is to sharp.)
Regards, Volodymyr
 
 Reply 
 
Mithilaj
Other, Technical Sales
FUJIFILM, United Arab Emirates (UAE), Joined Mar 2016, 4

Mithilaj

Other, Technical Sales
FUJIFILM,
United Arab Emirates (UAE),
Joined Mar 2016
4
08:45 Mar-23-2016
Re: Artifact identification on Films
In Reply to Volodymyr at 14:52 Mar-22-2016 .

Dear All,

Thanks for taking time in responding to my post. All of these comments does make sense.

As of now we have come across 3 possibilites:
1. Due to contaminated developer chemicals
2. Due to lead being gouge (thinner)
3. Flouroscent : cracks in the scintillation layer (This does not apply as we used lead packs in this applicaiton). But we see this cracks are only in one of the layers in the film.

Would this be a defect in the film ?

As I believe the rootcause identification coud be in two cases:
1. During exposure, before processing (Dry Process of RT)
2. During the processing process where chemicals (Wet Process of RT)

In this case I do have an added information that this Film was processed using Auto Processor.

Would this add any comments to why this scratch like formation appears.

Thanks for your continued suppor in sharing your experties.



 
 Reply 
 

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