Opening Raw Images

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Opening Raw Images

Justin Paul Yates
Hello,
A few months ago I had posted a question regarding opening a raw image. The
responses I received were very helpful, thanks to all that replied. I was
attempting to open a raw image file from a pQCT 2000 CT machine with a voxel
size of 0.20 mm and a slice thickness of 2.2 mm. Previously, I was able to
open images of this quality (16-bit signed) by specifying a pixel height and
width of 704, an image offset of 1609 and the little-endian byte order boxed
selected. However, I am attempting to open the same quality images from an
older CT scanner and the images will not open. Can anyone inform me if
altering the image offset parameter could help this matter?

Thanks for your time.

Justin Yates
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Re: Opening Raw Images

Frédéric Carlier
Hello,

I donnot know these machines, but just try. I guess the header size (=
offset parameter) has changed between the old machine compared  to the
new one. Maybe it's 0.

So take the file size in bytes, say = F
multiply height x widht in pixels,
multiply it by 2 (16 bit = 2 bytes), you get S
take offset = F-S in imageJ
try with toggling litlle indian or not

It should work !

Frédéric Carlier

Justin Paul Yates a écrit :

> Hello,
> A few months ago I had posted a question regarding opening a raw image. The
> responses I received were very helpful, thanks to all that replied. I was
> attempting to open a raw image file from a pQCT 2000 CT machine with a voxel
> size of 0.20 mm and a slice thickness of 2.2 mm. Previously, I was able to
> open images of this quality (16-bit signed) by specifying a pixel height and
> width of 704, an image offset of 1609 and the little-endian byte order boxed
> selected. However, I am attempting to open the same quality images from an
> older CT scanner and the images will not open. Can anyone inform me if
> altering the image offset parameter could help this matter?
>
> Thanks for your time.
>
> Justin Yates
>
>
>