[Mristudio-users] Problem loading high resolution scans into DTI Studio

Wed Mar 24 16:16:55 EDT 2010

Hi all,

Please try the following. I think Siemens changed their 12-orientation
scheme some time ago and this should work for VB13 and also VB15, I believe.

0: 0, 0, 0
1:  1.000000, 0.414250, -0.414250
2:  1.000000, -0.414250, -0.414250
3:  1.000000, -0.414250, 0.414250
4:  1.000000, 0.414250, 0.414250
5:  0.414250, 0.414250, 1.000000
6:  0.414250, 1.000000, 0.414250
7:  0.414250, 1.000000, -0.414250
8:  0.414250, 0.414250, -1.000000
9:  0.414250, -0.414250, -1.000000
10:  0.414250, -1.000000, -0.414250
11:  0.414250, -1.000000, 0.414250
12:  0.414250, -0.414250, 1.000000

On Wed, Mar 24, 2010 at 12:10 AM, Kevin Spitler <kevinspitler at gmail.com>wrote:

> Hi Bruce,Thanks for your gradient table.  I can't get this to load the
> data. Iget the error message "forgot gradient table" which may be
> becausethere are only 12 lines, instead of 13 (0 to 12), so when I number
> thelines provided, I get a different error message "forget gradient
> ofB0-image?"
> How do you use this gradient table?
> Thanks,Kevin
> On Sun, Mar 21, 2010 at 9:09 AM, Bruce Leggett <leggwork at yahoo.com>
> wrote:> this is the gradient table that I use for standard siemens 12
> direction>>>  X="-0.5197" Y="0.8541" Z="-0.0216">  X="0.5197" Y="-0.8541"
> Z="0.0216">  X="-0.1182" Y="0.4291" Z="-0.8955">  X="-0.7689" Y="0.0718"
> Z="0.6353">  X="0.5215" Y="0.8367" Z="-0.1673">  X="0.1193" Y="0.6159"
> Z="0.7788">  X="0.9157" Y="0.0436" Z="0.3994">  X="0.7689" Y="-0.0718"
> Z="-0.6353">  X="0.1182" Y="-0.4291" Z="0.8955">  X="-0.5215" Y="-0.8367"
> Z="0.1673">  X="-0.9157" Y="-0.0436" Z="-0.3994">  X="-0.1193" Y="-0.6159"
> Z="-0.7788">> thanks,> bruce>>> ________________________________> From:
> cwber <cwber at 126.com>> To: "DTI Studio, ROI Editor; Landmarker
> Questions/Support"> <mristudio-users at mristudio.org>> Sent: Sat, March 20,
> 2010 7:15:20 PM> Subject: Re: [Mristudio-users] Problem loading high
> resolution scans into> DTI Studio>> HI,>>>0: 0.000, 0.000, 0.000>>> 1:
> 0.500, 0.000, 0.500>>> 2: -0.500, 0.000, 0.500>>> 3: 0.000, 0.500, 0.500>>>
> 4: 0.000, 0.500, -0.500>>> 5: 0.500, 0.500, 0.000>>> 6: -0.500, 0.500,
> 0.000>>> 7: 1.000, 0.000, 1.000>>> 8: -1.000, 0.000, 1.000>>> 9: 0.000,
> 1.000, 1.000>>> 10: 0.000, 1.000, -1.000>>> 11: 1.000, 1.000, 0.000>>> 12:
> -1.000, 1.000, 0.000> As i know, the gradient table must be
> normalization.such as:> (x)^2+(y)^2+(z)^2 == 1 but your gradient table
> doesn't satisfy this> condition.i am not sure if there is any problem in
> your table. and senmens> trio's Dicom file saved as mosaic format, so when
> you choose the data format> you should paid attention to choose the right
> format. and you should ask> semens's engineer to check your gradient talbe.>
> good luck!> --> weibo>> 在2010-03-21 00:42:58，"Kevin Spitler" <
> kevinspitler at ucla.edu
> > 写道：>>I am using the same gradient table as before, which worked with the>>low resolution data (large slice thickness).>>>>We are using a 3T Trio scanner in Siemens.>>>>Would it help if I attached one of the files from a recent scan?>>>>Best,>>Kevin>>>>2010/3/20 cwber <
> cwber at 126.com>:>>> How did you get the gradient table, there maybe something wrong in your>>> gradient table, you can check it, and which factory's machine>
> did you use>>> philips, GE,or Semense?>>> -->>> 陈伟波>>>>>> 在2010-03-20 22:09:12，"Kevin Spitler" <
> kevinspitler at ucla.edu
> > 写道：>>>>I haven't upgraded the operating system.  I am still using Windows XP.>>>>>>>>Here is the gradient table:>>>>>>>>0: 0.000, 0.000, 0.000>>>> 1: 0.500, 0.000, 0.500>>>> 2: -0.500, 0.000, 0.500>>>> 3: 0.000, 0.500, 0.500>>>> 4: 0.000, 0.500, -0.500>>>> 5: 0.500, 0.500, 0.000>>>> 6: -0.500, 0.500, 0.000>>>> 7: 1.000, 0.000, 1.000>>>>> 8: -1.000, 0.000, 1.000>>>> 9: 0.000, 1.000, 1.000>>>> 10: 0.000, 1.000, -1.000>>>> 11: 1.000, 1.000, 0.000>>>> 12: -1.000, 1.000, 0.000>>>>>>>>Thanks for your help!  Please let me know what else I can send>>>>>>>>Best,>>>>Kevin>>>>>>>>>>>>On Thu, Mar 18, 2010 at 6:54 AM, susumu mori <
> susumu at mri.jhu.edu> wrote:>>>>>>>>>> Have you recently upgraded the operating system? Can I see the gradient table you used?>>>>>>>>>> On Wed, Mar>
> 17, 2010 at 11:32 PM, Kevin Spitler <kevinspitler at ucla.edu> wrote:>>>>>>>>>>>> Hello,>>>>>>>>>>>> We have recently starting acquiring high resolution scans and I am having difficulty loading them into DTI Studio.  I am using the same 12 direction gradient that worked on the low resolution (large slice thickness).  Although the DTI Studio program does not crash, the color map 0 generated is not correct (random color patterns over the tissue).>>>>>>>>>>>> The study was performed on&nbs>
> p;a 3T Trio scanner in Siemens.>>>>>> b values are b=0, b=600, b=1200>>>>>> Direction is 12>>>>>>>>>>>> I can provide more information or attach files if that would help solve the problem.  Thanks for your help>>>>>>>>>>>> Best,>>>>>> Kevin>>>>>> _______________________________________________>>>>>> Mristudio-users mailing list>>>>>>
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