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

[cwber]

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 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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