Reconstruction of optical energy deposition for backward optoacoustic imaging
Journal
Optical and Quantum Electronics
Journal Volume
37
Journal Issue
13-15
Pages
1339-1351
Date Issued
2005-12
Author(s)
C.-K. Liao
Abstract
Visualizing optical properties, such as the optical absorption coefficient, helps us to obtain structural information of biological tissues. In this paper, we present an efficient reconstruction algorithm for optical energy deposition in backward optoacoustic imaging. Note that econstruction of optical energy deposition is the first step to imaging the optical absorption coefficient distribution. This algorithm is derived from the optoacoustic wave equations with line focusing, in which the focusing techniques were utilized to reduce the reconstruction problem from three dimensions (3-D) to one dimension (1-D). Simulations and experiments were conducted to verify efficacy of this algorithm. In the simulations, optoacoustic signals were generated based on the solution of the optoacoustic wave equations. In the experiments, a 3-D backward mode optoacoustic imaging system was built. The system consisted of a Nd YAG laser for optical irradiation and an acoustic detection system with a broadband hydrophone. A phantom was used to illustrate validity of the proposed algorithm. The results show that optical energy deposition can be efficiently reconstructed in both simulations and experiments. © Springer 2006.
Subjects
Absorption coefficient distribution; Backward optoacoustic imaging; Optical energy deposition; Photoacoustics; Reconstruction; Ultrasound
Other Subjects
Algorithms; Light absorption; Optical properties; Photoacoustic effect; Ultrasonics; Visualization; Wave equations; Absorption coefficient distribution; Backward optoacoustic imaging; Optical energy deposition; Reconstruction; Imaging systems
Type
journal article