‘Biaxial serial excision’ or ‘polyaxial serial excision’
However, I wish to differ on the terminology used for the technique ‘biaxial’, described by the author, as it gives an erroneous impression. Biaxial implies two axes as shown in Figure 1 a and b where, the skin laxity in two axes is taken advantage of, in order to close the skin edges. The author’s technique described as “edges of the ellipse (excision planned) are extended outwards into multiple W’S and V’s” can be analyzed as in Figure 2a and b where the multiple W’s or V’s can be joined to form multiple ellipses. One can now see that the axes of excision of these different ellipses are multiple and the technique takes advantage of skin laxity along multiple different axes. Therefore, geometrically speaking, the technique should be called‘Polyaxial serial excision› and not Biaxial serial excision’ as claimed by the author.
Biaxial serial excision: A technique to deal with benign skin lesions and scars
Background: In the best of hands, the ultimate surgical scar of an otherwise well-performed surgery is unpredictable, and surgical techniques are constantly evolving to prevent or revise large scars. The present series uses the principles of serial excision to reduce the eventual scar length. Materials and Methods: Between January 1991 and December 2010, 30 patients were operated upon. In the first stage, a lesion was reduced in two dimensions with the intent to create a smaller lesion with the long axis favourably placed. The residual lesion was then excised after 4 weeks or more. Results: The resultant scars were smaller and better aligned, with an excellent skin match. Conclusion: A well-planned serial excision in a biaxial manner helps reduce the final scar.
Refinement of crystal structure parameters using convergent‐beam electron diffraction: the low‐temperature phase of SrTiO3
The method to refine crystal structure parameters (atom positions and Debye–Waller factors) using convergent-beam electron diffraction (CBED), which is applicable to crystal structure analysis of a small specimen area down to a few nm in diameter, is studied. The line profiles of higher-order Laue-zone reflections are recorded using imaging plates. Theoretical intensities are calculated based on the dynamical theory of electron diffraction with the aid of the generalized Bethe approximation to shorten calculation time. The structural parameters are determined by fitting the experimental profiles with the theoretical ones using a nonlinear least-squares method. The present method has been applied to the low-temperature phase of SrTiO3. The structural parameter or the rotation angle of the oxygen octahedron has been determined to be \varphi = 1.12 (4)°, which shows good agreement with that obtained from electron spin resonance experiments.