Dedicated to the memory
of Leon Ehrenpreis,
Larry Shepp,
Iosif Shneiberg,
dear friends and mathematicians.
W
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Contents
xi
III
Hybrid (Coupled Physics) Imaging Techniques
93
11
Thermo-, Photo-, and Optoacoustic Tomography (TAT
/
PAT
/
OAT) 97
11.1
Mathematical model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
11.2
Analysis of TAT: Acoustically homogeneous medium case . . . 105
11.3
Analysis of TAT: Acoustically inhomogeneous media . . . . . . 116
11.4
Reconstruction methods in TAT
/
PAT . . . . . . . . . . . . . . . . 121
11.5
Chapter’s final remarks and conclusions . . . . . . . . . . . . . . . 137
12
Ultrasound Modulation in EIT and OT
141
12.1
AET (acousto-electric tomography) . . . . . . . . . . . . . . . . . . 142
12.2
Synthetic focusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
12.3
Ultrasound modulated optical tomography (UMOT) . . . . . . 147
12.4
Chapter’s final remarks and conclusions . . . . . . . . . . . . . . . 149
13
Inverse Problems with Interior Information
151
13.1
The QPAT example worked out (well, sketched) . . . . . . . . . 154
13.2
Other examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
13.3
Generic linearized uniqueness . . . . . . . . . . . . . . . . . . . . . 156
IV
Appendices
157
A
Notation
159
A.1
Sets, vectors, etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
A.2
Multi-index notation and derivatives . . . . . . . . . . . . . . . . . 159
A.3
Some useful functions . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
A.4
Radon transform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
A.5
Some linear algebra . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
B
Brief Notes on the Fourier Transform and Harmonic Analysis
165
B.1
Harmonic analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
B.2
Fourier series expansions . . . . . . . . . . . . . . . . . . . . . . . . 167
B.3
Properties of Fourier series expansions . . . . . . . . . . . . . . . 168
B.4
Smoothness of
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