Converting Grass Tech TWIN PSG software to EDF

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Converting Grass Tech TWIN PSG software to EDF

Postby picklish » Wed Sep 04, 2013 10:41 am

I need to score a PSG study that was performed on Grass Technology TWIN PSG software, but don't have the software myself. I was wondering if I could either get hold of this software or simply convert the data that I have been sent into .edf format?

As the study folder is around 600Mb, and was sent to myself from Nigeria, via a slow internet connection, it would take a long time for it to be converted to .edf and re-sent. Additionally, the technicians over there are unsure about how to do such a thing, and I don't have a manual for TWIN software to be able to talk them through it.

I've contact Grass (and companies usually seem quite happy to give out their software - at least Respironics, Weinmann and Embla all have been happy to in the past) but no response, so I was wondering if you guys had any ideas?
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Postby somnonaut » Wed Sep 04, 2013 12:51 pm

This is an interesting question.
Researching TWin,
http://www.grasstechnologies.com/produc ... ineeg.html
we see that
"TWin export functions allow output of information (raw data, graphics, and text to standard formats (including ASCII and EDF), as well as direct links to programs in Microsoft Office® for report generation and database management. TWin can also import EDF files."

So, it can export and import EDF.
I would just rename the data file (usually largest non-video file) to .edf, and try to open it an EDF viewer. Maybe the open sourced EDFBrowser can view the waveforms. www.teuniz.net/edfbrowser/‎

You never know if a vendor is actually writing their files in EDF and just not announcing it.
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Postby somnonaut » Wed Sep 04, 2013 12:52 pm

Sorry link to EDF browser was bad.
http://www.teuniz.net/edfbrowser/
This one works
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Postby picklish » Wed Sep 04, 2013 1:57 pm

somnonaut wrote:This is an interesting question.
Researching TWin,
http://www.grasstechnologies.com/produc ... ineeg.html
we see that
"TWin export functions allow output of information (raw data, graphics, and text to standard formats (including ASCII and EDF), as well as direct links to programs in Microsoft Office® for report generation and database management. TWin can also import EDF files."

So, it can export and import EDF.
I would just rename the data file (usually largest non-video file) to .edf, and try to open it an EDF viewer. Maybe the open sourced EDFBrowser can view the waveforms. www.teuniz.net/edfbrowser/‎

You never know if a vendor is actually writing their files in EDF and just not announcing it.


Yeah, I tried it with the edfbrowser and also RemLogic but no success. The files consist of the video .avi files, a couple of hundred corresponding .ref files, which take up the most of the folder, and then the other files are a couple of .xml and .txt files, then the only other files are of the type "header.dat", "logfile.qqq" and finally "record.tfn" which is the largest file that isn't either .avi or .ref file type.

So, do you think it's the header.dat file that needs renamed, or record.tfn?
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Postby somnonaut » Wed Sep 04, 2013 2:02 pm

I would try record.tfn first.
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Postby picklish » Thu Sep 05, 2013 11:21 am

No success unfortunately, but I'm getting the software, just so I can covert it into .edf and score it on a program I am familiar with.

Thanks for your help anyway :D
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Re:

Postby mahmoodping » Tue Jul 09, 2019 5:17 pm

picklish wrote:No success unfortunately, but I'm getting the software, just so I can covert it into .edf and score it on a program I am familiar with.

Thanks for your help anyway :D


Hi sir

Sorry for replying on this old post but I am wondering if I can get this Twin PSG software cause I am facing the same issue as yours here.
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Re: Converting Grass Tech TWIN PSG software to EDF

Postby picklish » Tue Jul 09, 2019 9:41 pm

Sorry, I don't have it, and Grass Technoogies seems to re-direct to Natus these days - may be worth emailing them
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Re: Converting Grass Tech TWIN PSG software to EDF

Postby somnonaut » Wed Jul 10, 2019 1:34 am

Sidenote: I just had to reawaken Natus to the fact that they own the software from CNS, Inc. (I was looking for Matrix software, if anyone has ;) which had sold their sleep business to Aequitron (after they were blessed with the Breath-Rite strips), which sold to Nellcorpb, which sold to Mallinckrodt, which... Well, they did admit that they do own the IP.
From Reuters Business filing:
https://www.reuters.com/finance/stocks/ ... le/BABY.OQ

"The Company's diagnostic PSG systems include Embla REMlogic, and Sandman; Xltek SleepWorks; Schwartzer Coherence, and Grass Twin. Its diagnostic PSG systems capture and store all data digitally. Its data acquisition systems are sold under brand names, such as Embla and MPR, Xltek Trex and SleepWorks, Schwarzer and Nicolet."
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Re: Converting Grass Tech TWIN PSG software to EDF

Postby mahmoodping » Wed Jul 10, 2019 6:00 pm

picklish wrote:Sorry, I don't have it, and Grass Technoogies seems to re-direct to Natus these days - may be worth emailing them


Thank you for your reply
So what do you suggest to do with this data to convert it to edf format?
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Re: Converting Grass Tech TWIN PSG software to EDF

Postby mahmoodping » Wed Jul 10, 2019 6:12 pm

somnonaut wrote:Sidenote: I just had to reawaken Natus to the fact that they own the software from CNS, Inc. (I was looking for Matrix software, if anyone has ;) which had sold their sleep business to Aequitron (after they were blessed with the Breath-Rite strips), which sold to Nellcorpb, which sold to Mallinckrodt, which... Well, they did admit that they do own the IP.
From Reuters Business filing:
https://www.reuters.com/finance/stocks/ ... le/BABY.OQ

"The Company's diagnostic PSG systems include Embla REMlogic, and Sandman; Xltek SleepWorks; Schwartzer Coherence, and Grass Twin. Its diagnostic PSG systems capture and store all data digitally. Its data acquisition systems are sold under brand names, such as Embla and MPR, Xltek Trex and SleepWorks, Schwarzer and Nicolet."

Thank you sir for your reply, I am a newbie in sleep scoring and my supervisor gave me this data for scoring it using deep learning models, how can I deal with this kind of format?
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