Loading a .fid file into Matlab?
in [Matlab]
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From: Louise Anderson on 17 Jun 2010 08:22 Hi, I am trying to write a program for MRI image reconstruction in Matlab at the moment and would like to load the raw k-space data into Matlab. The data is from a Bruker BioSpin machine with file extention .fid, is there any way of loading it directly into Matlab or do I need to find some way to convert it into an ASCII file first? Any help would be greatly appreciated! Best Regards, Louise Anderson
From: us on 17 Jun 2010 08:30 "Louise Anderson" <andersol(a)student.chalmers.se> wrote in message <hvd41d$ho4$1(a)fred.mathworks.com>... > Hi, > I am trying to write a program for MRI image reconstruction in Matlab at the moment and would like to load the raw k-space data into Matlab. The data is from a Bruker BioSpin machine with file extention .fid, is there any way of loading it directly into Matlab or do I need to find some way to convert it into an ASCII file first? > Any help would be greatly appreciated! > Best Regards, > Louise Anderson a hint: - if you know the anatomy of those files, use ML's low-level i/o functions to slurp it... % just to name a few... help fopen; help fclose; help fread; help memmapfile; us
From: Louise Anderson on 17 Jun 2010 09:01 "us " <us(a)neurol.unizh.ch> wrote in message <hvd4gv$id7$1(a)fred.mathworks.com>... > "Louise Anderson" <andersol(a)student.chalmers.se> wrote in message <hvd41d$ho4$1(a)fred.mathworks.com>... > > Hi, > > I am trying to write a program for MRI image reconstruction in Matlab at the moment and would like to load the raw k-space data into Matlab. The data is from a Bruker BioSpin machine with file extention .fid, is there any way of loading it directly into Matlab or do I need to find some way to convert it into an ASCII file first? > > Any help would be greatly appreciated! > > Best Regards, > > Louise Anderson > > a hint: > - if you know the anatomy of those files, use ML's low-level i/o functions to slurp it... > > % just to name a few... > help fopen; > help fclose; > help fread; > help memmapfile; > > us Hi, Unfortunatly, I do not know the underlying structure of them. Is there anybody else who have succeded of loading a .fid file into Matlab, or written some interface for it? Kind regards, Louise
From: us on 17 Jun 2010 09:16 "Louise Anderson" <andersol(a)student.chalmers.se> wrote in message <hvd6ak$d2f$1(a)fred.mathworks.com>... > "us " <us(a)neurol.unizh.ch> wrote in message <hvd4gv$id7$1(a)fred.mathworks.com>... > > "Louise Anderson" <andersol(a)student.chalmers.se> wrote in message <hvd41d$ho4$1(a)fred.mathworks.com>... > > > Hi, > > > I am trying to write a program for MRI image reconstruction in Matlab at the moment and would like to load the raw k-space data into Matlab. The data is from a Bruker BioSpin machine with file extention .fid, is there any way of loading it directly into Matlab or do I need to find some way to convert it into an ASCII file first? > > > Any help would be greatly appreciated! > > > Best Regards, > > > Louise Anderson > > > > a hint: > > - if you know the anatomy of those files, use ML's low-level i/o functions to slurp it... > > > > % just to name a few... > > help fopen; > > help fclose; > > help fread; > > help memmapfile; > > > > us > > > Hi, > Unfortunatly, I do not know the underlying structure of them. Is there anybody else who have succeded of loading a .fid file into Matlab, or written some interface for it? > Kind regards, > Louise well... this may(!) be helpful http://www.pascal-man.com/navigation/faq-java-browser/file-conversion.shtml us
From: Walter Roberson on 17 Jun 2010 09:29 Louise Anderson wrote: > "us " <us(a)neurol.unizh.ch> wrote in message > <hvd4gv$id7$1(a)fred.mathworks.com>... >> "Louise Anderson" <andersol(a)student.chalmers.se> wrote in message >> <hvd41d$ho4$1(a)fred.mathworks.com>... >> > I am trying to write a program for MRI image reconstruction in >> Matlab at the moment and would like to load the raw k-space data into >> Matlab. The data is from a Bruker BioSpin machine with file extention >> .fid, is there any way of loading it directly into Matlab or do I need >> to find some way to convert it into an ASCII file first? > Unfortunatly, I do not know the underlying structure of them. Is there > anybody else who have succeded of loading a .fid file into Matlab, or > written some interface for it? If the Bruker BioSpin are like the Bruker ElectroSpin then there is a console command to convert them to ascii. The format for the 360 and 400 fid files is not especially complex; about the only real trick is that you have to detect the 'endian'. Do *not* simply check out a couple of files and use the byte order of those, as the devices are allowed to store in either byte order, and eventually you will receive a file in the other byte order. Unfortunately I no longer remember what the .fid format _is_, and I believe we have lost the conversion code. See, for example, http://www.pascal-man.com/navigation/faq-java-browser/fid-To-Ascii.shtml
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