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📄 xmedcon - orientation.htm

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<P><BR>
<CENTER>
<TABLE cols=2 border=1 NOSAVE>
  <TBODY>
  <TR NOSAVE>
    <TD NOSAVE>
      <TABLE cols=2 width="100%" NOSAVE>
        <TBODY>
        <TR NOSAVE>
          <TD NOSAVE><B><FONT size=+1>2a. <U>Head First</U></FONT></B></TD>
          <TD></TD></TR>
        <TR vAlign=center align=middle NOSAVE>
          <TD NOSAVE><IMG height=200 alt="prone head first" 
            src="XMedCon - Orientation_files/patientPHF.gif" width=200 
            align=left lowsrc=images/patientPHF.gif></TD>
          <TD>
            <TABLE cols=4 width=100 border=1 NOSAVE>
              <TBODY>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle NOSAVE></TD>
                <TD colSpan=3 NOSAVE><B>Transverse</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD></TD>
                <TD><B>x</B></TD>
                <TD vAlign=center align=middle NOSAVE><B>y</B></TD>
                <TD><B>z</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Row</SUB></B></TD>
                <TD>-1</TD>
                <TD>+0</TD>
                <TD>-0</TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Col</SUB></B></TD>
                <TD>-0</TD>
                <TD>-1</TD>
                <TD>+0</TD></TR></TBODY></TABLE>
            <TABLE cols=4 width=100 border=1 NOSAVE>
              <TBODY>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle NOSAVE></TD>
                <TD colSpan=3 NOSAVE><B>Sagittal</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD></TD>
                <TD><B>x</B></TD>
                <TD vAlign=center align=middle NOSAVE><B>y</B></TD>
                <TD><B>z</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Row</SUB></B></TD>
                <TD>-0</TD>
                <TD>-1</TD>
                <TD>+0</TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Col</SUB></B></TD>
                <TD>+0</TD>
                <TD>-0</TD>
                <TD>-1</TD></TR></TBODY></TABLE>
            <TABLE cols=4 width=100 border=1 NOSAVE>
              <TBODY>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle NOSAVE></TD>
                <TD colSpan=3 NOSAVE><B>Coronal</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD></TD>
                <TD><B>x</B></TD>
                <TD vAlign=center align=middle NOSAVE><B>y</B></TD>
                <TD><B>z</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Row</SUB></B></TD>
                <TD>-1</TD>
                <TD>+0</TD>
                <TD>-0</TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Col</SUB></B></TD>
                <TD>+0</TD>
                <TD>-0</TD>
                <TD>-1</TD></TR></TBODY></TABLE>&nbsp;</TD></TR>
        <TR>
          <TD>Fig.: Patient Pone Head First</TD>
          <TD>Tables: Direction cosines</TD></TR></TBODY></TABLE><BR>&nbsp; 
      <CENTER>
      <TABLE cols=3 border=1 NOSAVE>
        <TBODY>
        <TR vAlign=center align=middle NOSAVE>
          <TD NOSAVE><B>Transverse</B> <BR>(XY-plane)</TD>
          <TD><B>Sagittal</B> <BR>(YZ-plane)</TD>
          <TD><B>Coronal</B> <BR>(XZ-plane)</TD></TR>
        <TR vAlign=center align=middle NOSAVE>
          <TD NOSAVE><IMG height=75 alt=transverse 
            src="XMedCon - Orientation_files/ltransverse.gif" width=75 
            lowsrc=images/ltransverse.gif> 
            <P><B>R</B>ight \ <B>A</B>nterior&nbsp; <BR>Slices -&gt; -z 
          (F)</P></TD>
          <TD><IMG height=75 alt=sagittal 
            src="XMedCon - Orientation_files/lsagittal.gif" width=75 
            lowsrc=images/lsagittal.gif> 
            <P><B>A</B>nterior \ <B>F</B>eet&nbsp; <BR>Slices -&gt; +x 
(L)</P></TD>
          <TD><IMG height=75 alt=coronal 
            src="XMedCon - Orientation_files/lcoronal.gif" width=100 
            lowsrc=images/lcoronal.gif> 
            <P><B>R</B>ight \ <B>F</B>eet&nbsp; <BR>Slices -&gt; +y 
        (P)</P></TD></TR></TBODY></TABLE></CENTER>&nbsp;&nbsp;&nbsp; Table: 
      Direction of row\column unit vector and slices</TD>
    <TD>
      <TABLE cols=2 width="100%" NOSAVE>
        <TBODY>
        <TR NOSAVE>
          <TD NOSAVE><B><FONT size=+1>2b. <U>Feet First</U></FONT></B></TD>
          <TD></TD></TR>
        <TR vAlign=center align=middle NOSAVE>
          <TD NOSAVE><IMG height=200 alt="prone feet first" 
            src="XMedCon - Orientation_files/patientPFF.gif" width=200 
            align=left lowsrc=images/patientPFF.gif></TD>
          <TD>
            <TABLE cols=4 width=100 border=1 NOSAVE>
              <TBODY>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle NOSAVE></TD>
                <TD colSpan=3 NOSAVE><B>Transverse</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD></TD>
                <TD><B>x</B></TD>
                <TD vAlign=center align=middle NOSAVE><B>y</B></TD>
                <TD><B>z</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Row</SUB></B></TD>
                <TD>+1</TD>
                <TD>-0</TD>
                <TD>+0</TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Col</SUB></B></TD>
                <TD>-0</TD>
                <TD>-1</TD>
                <TD>+0</TD></TR></TBODY></TABLE>
            <TABLE cols=4 width=100 border=1 NOSAVE>
              <TBODY>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle NOSAVE></TD>
                <TD colSpan=3 NOSAVE><B>Sagittal</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD></TD>
                <TD><B>x</B></TD>
                <TD vAlign=center align=middle NOSAVE><B>y</B></TD>
                <TD><B>z</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Row</SUB></B></TD>
                <TD>-0</TD>
                <TD>-1</TD>
                <TD>+0</TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Col</SUB></B></TD>
                <TD>-0</TD>
                <TD>+0</TD>
                <TD>+1</TD></TR></TBODY></TABLE>
            <TABLE cols=4 width=100 border=1 NOSAVE>
              <TBODY>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle NOSAVE></TD>
                <TD colSpan=3 NOSAVE><B>Coronal</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD></TD>
                <TD><B>x</B></TD>
                <TD vAlign=center align=middle NOSAVE><B>y</B></TD>
                <TD><B>z</B></TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Row</SUB></B></TD>
                <TD>+1</TD>
                <TD>-0</TD>
                <TD>+0</TD></TR>
              <TR vAlign=center align=middle NOSAVE>
                <TD vAlign=center align=middle 
NOSAVE><B>V<SUB>Col</SUB></B></TD>
                <TD>-0</TD>
                <TD>+0</TD>
                <TD>+1</TD></TR></TBODY></TABLE>&nbsp;</TD></TR>
        <TR>
          <TD>Fig.: Patient Prone Feet First</TD>
          <TD>Tables: Direction cosines</TD></TR></TBODY></TABLE><BR>&nbsp; 
      <CENTER>
      <TABLE cols=3 border=1 NOSAVE>
        <TBODY>
        <TR vAlign=center align=middle NOSAVE>
          <TD NOSAVE><B>Transverse</B> <BR>(XY-plane)</TD>
          <TD NOSAVE><B>Sagittal</B> <BR>(YZ-plane)</TD>
          <TD><B>Coronal</B> <BR>(XZ-plane)</TD></TR>
        <TR vAlign=center align=middle NOSAVE>
          <TD NOSAVE><IMG height=75 alt=transverse 
            src="XMedCon - Orientation_files/ltransverse.gif" width=75 
            lowsrc=images/ltransverse.gif> 
            <P><B>L</B>eft \ <B>A</B>nterior&nbsp; <BR>Slices -&gt; +z 
(H)</P></TD>
          <TD><IMG height=75 alt=sagittal 
            src="XMedCon - Orientation_files/lsagittal.gif" width=75 
            lowsrc=images/lsagittal.gif> 
            <P><B>A</B>nterior \ <B>H</B>ead&nbsp; <BR>Slices -&gt; -x 
(R)</P></TD>
          <TD><IMG height=75 alt=coronal 
            src="XMedCon - Orientation_files/lcoronal.gif" width=100 
            lowsrc=images/lcoronal.gif> 
            <P><B>L</B>eft \ <B>H</B>ead&nbsp; <BR>Slices -&gt; +y 
        (P)</P></TD></TR></TBODY></TABLE></CENTER>&nbsp;&nbsp;&nbsp; Table: 
      Direction of row\column unit vector and 
slices</TD></TR></TBODY></TABLE></CENTER>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The only item still missing in the 
previous overview is the <B>origin of the coordinate system</B>. When this is 
unspecified, which is the case for most supported image formats in (X)MedCon 
(besides DICOM) we will consider the origin as follows: 
<CENTER>
<P>&nbsp;Looking at the front of the equipment device, the origin of the 
coordinate system <BR>will be located in the lower right corner at the back of 
the equipment device gantry.</CENTER>
<P>As an example: for transverse slices in a patient based supine head first 
coordinate system (= equipment based ) the origin of the coordinate system will 
be located in the lower right corner of the very first transverse slice as 
illustrated in the picture below. 
<CENTER><IMG height=200 alt="coordinate origin" 
src="XMedCon - Orientation_files/coord_origin.gif" width=200 
lowsrc=images/coord_origin.gif> <BR>Fig.: Choice of origin for a patient based 
supine head first <BR>coordinate system with sequential transverse 
slices</CENTER>
<P><BR><BR>&nbsp; <BR>&nbsp; </P></BODY></HTML>
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