SymmetryAnalysis

Requirement

An essential requirement for a valid symmetrical diagnostic is that the program must be applied to a projection with a 0º tilt angle.

Running the allspace.com

After running the is presented next

SPACEGROUP       Phase resid(No)  Phase resid(No)     OX     OY      TX     TY     Target residual based on

1. 
  1. 
    1. 
      1. 
        1. 
          1. other spots    v.theoretical                                    statistics taking (90 random)       (45 random)                                    Friedel weight into account



1  p1            7.4   198        5.2   198      2  p2           75.2    99       37.6   198    -41.7  167.6    0.00   0.00       10.4      5b c12_b        61.0    59       42.2    14    112.2 -171.0    0.00   0.00        7.7      5a c12_a        69.9    59       45.2    14   -180.0  -68.9    0.00   0.00        7.7     13  p3            1.5*  198        --     --     -0.1    0.1    0.00   0.00        7.4     14  p312         42.1   474       42.9    24      0.0    0.0    0.00   0.00        7.4     15  p321         24.7   483       38.9    42      0.0    0.0    0.00   0.00        7.5     16  p6           50.2   495       41.5   198    120.0 -120.0    0.00   0.00        8.0     17  p622         55.2  1056       44.9   198      0.0    0.0    0.00   0.00        7.7



* 
  * 
    * 
      * 
        * = acceptable  = should be considered ` = possibility

As can be seen, a triangular symmetry () is detected in this particular Phantom. The presence of symmetry will be used in the future algorithms of 3D reconstruction to simplify the operations.

-- Main.JavierRodriguez - 13 Mar 2007