Title :
An explanation of the effects of Squashing in limited angle tomography
Author :
Olson, Tim ; Jaffe, Jules S.
Author_Institution :
Div. of Math., Auburn Univ., AL, USA
fDate :
9/1/1990 12:00:00 AM
Abstract :
The effects of Squashing, an algorithm introduced by J.A. Reeds and L.A. Shepp (see ibid., vol.MI-6, no.2, p.89-97, June 1987), are described. It is proven that Squashing induces a weight function upon the projections. Intuitive and numerical evidence is presented showing that this weight function is not desirable at limited angles. A method to counteract the effects of the weight function and extend the usefulness of the algorithm to 120° is proposed
Keywords :
computerised tomography; Squashing algorithm effects; limited angle tomography; medical diagnostic imaging; projections; weight function; Goniometers; Helium; Integral equations; Laboratories; Mathematics; Sea measurements; Tomography;
Journal_Title :
Medical Imaging, IEEE Transactions on
