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

cwber cwber at 126.com
Wed Mar 24 04:23:48 EDT 2010 

Hi, 
you should add the B=0 gradient, as follow,
0: 0.000, 0.000, 0.000
and then use the table below. you should make sure your b=0 images is arranged firstly.
best wishes!

--

weber
 


在2010-03-24 12:10:06，"Kevin Spitler" <kevinspitler at gmail.com> 写道：
>Hi Bruce,
>Thanks for your gradient table.  I can't get this to load the data. I
>get the error message "forgot gradient table" which may be because
>there are only 12 lines, instead of 13 (0 to 12), so when I number the
>lines provided, I get a different error message "forget gradient of
>B0-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
>>>>>>> _______________________________________________
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>>>>>>
>>>>>>
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