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<div class="moz-cite-prefix">Hi Michael,<br>
<br>
I am investigating it. There were a few changes in the SPECT
system do deal with negative angles with the first-and-last angles
option.<br>
<br>
Are you specifying all angles for each projection, or do you
provide the first and last angles ?<br>
In the latter case, could you give me the values of these angles
and say if you specify a detector rotation direction ?<br>
<br>
Aside from this, did you try to flip one of the images and do a
subtraction to see if the attenuation is indeed correctly taken
into account ?<br>
<br>
At least, I can say that this is not just the output that is
flipped... But you can use option -flip-out to do so if you need
to in any circomstances.<br>
<br>
Thanks for your active contribution !<br>
<br>
Best<br>
Simon<br>
<br>
Le 26/05/2018 à 09:07, Michael Ljungberg a écrit :<br>
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<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif">Hi<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif">I wonder
if you have made a change in the orientation between version
1 and 2? When I reconstruct the same data and for SPECT with
v2, I get the image upside down compared to version 1. If so
– do I need to make anything regarding the orientation of
the attenuation map or is it only the output that is
flipped?
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif;mso-fareast-language:EN-GB"><img
id="Picture_x0020_1"
src="cid:part1.E62CCF71.AC373296@cea.fr" class=""
width="506" height="250"></span><span
style="font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif">Left
version 2 and right version 1<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif;mso-fareast-language:EN-GB">Hälsningar
/ Best Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Verdana",sans-serif;mso-fareast-language:EN-GB">Michael<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">________________________</span></b><span
style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Michael
Ljungberg</span></b><span style="font-size:11.0pt">, PhD,
professor<br>
Department of Medical Radiation Physics<br>
Lund University<br>
<a
href="https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmaps.google.com%2F%3Fq%3DBarngatan%2B4%26entry%3Dgmail%26source%3Dg&data=01%7C01%7Candrew.reader%40kcl.ac.uk%7C8887055ab42e464f723f08d58aabcdec%7C8370cf1416f34c16b83c724071654356%7C0&sdata=d%2FyaBdxE5jPZO7jfzv8GsYgKHDtSbq4OaXloWB4yFjo%3D&reserved=0"
moz-do-not-send="true"><span style="color:#0563C1">Barngatan
4</span></a><br>
SE-221 85 Lund<br>
Phone: +46 46 173565<br>
Cellular: +46 708 173115<br>
<a
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<p class="MsoNormal"><span style="font-size:11.0pt"> <o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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