PMID- 2660390
OWN - NLM
STAT- MEDLINE
DCOM- 19890721
LR  - 20170214
IS  - 0161-7346 (Print)
IS  - 0161-7346 (Linking)
VI  - 11
IP  - 1
DP  - 1989 Jan
TI  - Numerical study of higher-order diffraction tomography via the sinc basis moment 
      method.
PG  - 42-74
AB  - Behavior and limitations of the sinc basis method have been discovered during 
      simulation studies. An iterative row-action method (ART) is compared with a 
      full-matrix, least-squares solution (QR decomposition) and the problem of 
      multiple solutions is discussed. Knowledge of the spatial distribution of 
      scattered field energy can be used to speed up convergence. The first iteration 
      is shown to be equivalent to the first Born solution. A fundamental limitation of 
      present diffraction tomography algorithms, concerning phase shift through the 
      scatterer, is found and related to clinical values. Effects of improvements on 
      the initial guesses for the object function and internal field are studied. Lossy 
      cylinder and contrived multicomponent reconstructions yield additional 
      understanding of the phase shift problem. A sequence of simulations investigates 
      estimated solution movement in hyperspace.
FAU - Cavicchi, T J
AU  - Cavicchi TJ
AD  - Department of Electrical and Computer Engineering University of Illinois, Urbana 
      61801.
FAU - O'Brien, W D Jr
AU  - O'Brien WD Jr
LA  - eng
GR  - CA 09067/CA/NCI NIH HHS/United States
GR  - CA36029/CA/NCI NIH HHS/United States
PT  - Journal Article
PT  - Research Support, U.S. Gov't, P.H.S.
PL  - England
TA  - Ultrason Imaging
JT  - Ultrasonic imaging
JID - 7909167
SB  - IM
MH  - Humans
MH  - Mathematics
MH  - Tomography/*methods
MH  - Ultrasonography/*methods
EDAT- 1989/01/01 00:00
MHDA- 2001/03/28 10:01
CRDT- 1989/01/01 00:00
PHST- 1989/01/01 00:00 [pubmed]
PHST- 2001/03/28 10:01 [medline]
PHST- 1989/01/01 00:00 [entrez]
AID - 10.1177/016173468901100103 [doi]
PST - ppublish
SO  - Ultrason Imaging. 1989 Jan;11(1):42-74. doi: 10.1177/016173468901100103.