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<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Hi , i have
a big trouble and loosing a lot of
sleeping time in attempts to resolve it :<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">I have a
dicom serie of a head :<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Patient
Position is : L\P<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Patient
Position is : HFS<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Image
Orientation Patient is 1,0,0 0,1,0<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">IMAGE
POSITION PATIENT for FIRST SLICE
IS : 0 , 0 , 0 <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">
for SECOND SLICE IS : 0, 0 , 1<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">
for THIRD SLICE IS : 0, 0
, 2<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">
for <st1:metricconverter productid="4’" w:st="on">4’</st1:metricconverter>
SLICE IS
: 0, 0 , 3<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">
and so on according with slice spacing.( <st1:metricconverter
productid="1 mm" w:st="on">1 mm</st1:metricconverter>)<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">1-<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"> The z
axis is increasing toward the head
of the patient so <b><span style="font-weight: bold;">I assume the
orientation
cosines for z should be : 0,0,1</span></b><o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"> <b><span
style="font-weight: bold;">Am I right
?<o:p></o:p></span></b></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"> <b><span
style="font-weight: bold;">Considering
Image orientation patient (1,0,0 0,1,0); the axes direction cosines
became: 1,0,0 ,0,1,0, 0,0,1<o:p></o:p></span></b></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"> <b><span
style="font-weight: bold;">Am I right?<o:p></o:p></span></b></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">2-<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"> in a
different serie <b><span style="font-weight: bold;">IF</span></b> I
obtain a z value decreasing
toward the head I should assume the orientation cosines for z ( 0,0,-1)
? <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"> Am I
right?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">3- <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Regarding
case 1: even if all seems right with axes orientation
cosines I discover a strange behaviour after loading the dicom serie (
I verified
with the real patient left and right sides) :<o:p></o:p></span></font></p>
<p class="MsoNormal"><b><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; font-weight: bold;"
lang="EN-GB">The left part of
the patient became the right part. Why?<o:p></o:p></span></font></b></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">I must flip
the dataset along an axe ( flipX for
example ) to obstain the correct L and R side according to the real
patient<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">I’m using
gdcm….<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Thanks a lot
for suggestions<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB"><o:p> </o:p></span></font></p>
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