Research output: Contribution to journal › Article › peer-review
Determination of Discontinuities of a Function in a Domain with Refraction from Its Attenuated Ray Transform. / Derevtsov, E. Yu; Maltseva, S. V.; Svetov, I. E.
In: Journal of Applied and Industrial Mathematics, Vol. 12, No. 4, 01.10.2018, p. 619-641.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Determination of Discontinuities of a Function in a Domain with Refraction from Its Attenuated Ray Transform
AU - Derevtsov, E. Yu
AU - Maltseva, S. V.
AU - Svetov, I. E.
N1 - Publisher Copyright: © 2018, Pleiades Publishing, Ltd.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - Some results of numerical investigations are presented for the problem of determination of discontinuities of an unknown function that has the meaning of the internal source distribution and is given in a domain with absorption and refraction, on using the attenuated ray transform of the function. The refraction and the absorption coefficient are assumed to be given. The behavior of the available and newly constructed discontinuity indicator operators is investigated in some numerical tests. Some modification of discontinuity indicators was carried out for the purpose of applying them in the model of refractive tomography with absorption. Numerical methods are applied to investigate the possibility of using the operators of this kind for solving the problem of finding the discontinuities of a function from its attenuated ray transform; the degree is investigated of the influence on the recovery quality of such factors as the level of the noise introduced into the generated data, the parameters of metrics, the magnitude and variation of the absorption coefficient.
AB - Some results of numerical investigations are presented for the problem of determination of discontinuities of an unknown function that has the meaning of the internal source distribution and is given in a domain with absorption and refraction, on using the attenuated ray transform of the function. The refraction and the absorption coefficient are assumed to be given. The behavior of the available and newly constructed discontinuity indicator operators is investigated in some numerical tests. Some modification of discontinuity indicators was carried out for the purpose of applying them in the model of refractive tomography with absorption. Numerical methods are applied to investigate the possibility of using the operators of this kind for solving the problem of finding the discontinuities of a function from its attenuated ray transform; the degree is investigated of the influence on the recovery quality of such factors as the level of the noise introduced into the generated data, the parameters of metrics, the magnitude and variation of the absorption coefficient.
KW - absorption
KW - attenuated ray transform
KW - back-projection
KW - discontinuity indicator
KW - discontinuous function
KW - internal source
KW - refraction
KW - tomography
UR - http://www.scopus.com/inward/record.url?scp=85058109537&partnerID=8YFLogxK
U2 - 10.1134/S1990478918040038
DO - 10.1134/S1990478918040038
M3 - Article
AN - SCOPUS:85058109537
VL - 12
SP - 619
EP - 641
JO - Journal of Applied and Industrial Mathematics
JF - Journal of Applied and Industrial Mathematics
SN - 1990-4789
IS - 4
ER -
ID: 17831716