Comparison of lp-regularization-based reconstruction methods for time domain fluorescence molecular tomography on early time gates

2014 ◽  
Author(s):  
Lingling Zhao ◽  
He Yang ◽  
Wenxiang Cong ◽  
Ge Wang ◽  
Xavier Intes
Keyword(s):  
Time Domain ◽  
Early Time ◽  
Fluorescence Molecular Tomography ◽  
Reconstruction Methods

Simple inversion of time‐domain electromagnetic data

Geophysics ◽  
1984 ◽  
Vol 49 (7) ◽  
pp. 925-933 ◽  
Author(s):  
C. T. Barnett
Keyword(s):  
Time Domain ◽  
Eddy Currents ◽  
Early Time ◽  
Late Time ◽  
Current Filament ◽  
Equivalent Current ◽  
Time Domain Electromagnetic ◽  
Inversion Procedure ◽  
Current Filaments ◽  
Simple Inversion

The eddy currents induced in a thin confined conductor by a fixed‐loop time‐domain EM system can be represented by a single equivalent current filament. The equivalent current filament stays in the plane of the conductor at all times during the decay of the secondary field, but tends to migrate from a position of maximum primary field coupling at early time toward the center of the conductor at late time. This filament approximation is used in the design of a least‐squares inversion procedure which fits circular or rectangular current filaments to an observed eddy current distribution. The inversion procedure provides a rapid but precise means of estimating the position, size, and attitude of a conductor which has been detected by a time‐domain EM survey.

scholarly journals Adaptive hp finite element method for fluorescence molecular tomography with simplified spherical harmonics approximation

2014 ◽  
Vol 07 (02) ◽  
pp. 1350057 ◽  
Author(s):  
Hongbo Guo ◽  
Yuqing Hou ◽  
Xiaowei He ◽  
Jingjing Yu ◽  
Jingxing Cheng ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Spherical Harmonics ◽  
Diffusion Approximation ◽  
Model Simulation ◽  
Fluorescence Molecular Tomography ◽  
Reconstruction Process ◽  
Reconstruction Methods ◽  
Element Method ◽  
Hp Finite Element

Recently, the simplified spherical harmonics equations (SPN) model has attracted much attention in modeling the light propagation in small tissue geometries at visible and near-infrared wavelengths. In this paper, we report an efficient numerical method for fluorescence molecular tomography (FMT) that combines the advantage of SPN model and adaptive hp finite element method (hp-FEM). For purposes of comparison, hp-FEM and h-FEM are, respectively applied to the reconstruction process with diffusion approximation and SPN model. Simulation experiments on a 3D digital mouse atlas and physical experiments on a phantom are designed to evaluate the reconstruction methods in terms of the location and the reconstructed fluorescent yield. The experimental results demonstrate that hp-FEM with SPN model, yield more accurate results than h-FEM with diffusion approximation model does. The phantom experiments show the potential and feasibility of the proposed approach in FMT applications.

scholarly journals A Depth-recognizable Time-domain Fluorescence Molecular Tomography in Reflective Geometry

2021 ◽  
Author(s):  
Jiaju Cheng ◽  
PENG ZHANG ◽  
Chuangjian Cai ◽  
yang gao ◽  
Jie Liu ◽  
...  
Keyword(s):  
Time Domain ◽  
Fluorescence Molecular Tomography

Sensor fault diagnosis in a wastewater treatment process

2006 ◽  
Vol 53 (1) ◽  
pp. 251-257 ◽  
Author(s):  
C. Lee ◽  
S.W. Choi ◽  
I.-B. Lee
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Principal Component ◽  
Early Time ◽  
Previous Method ◽  
Fault Isolation ◽  
Sensor Faults ◽  
Sensor Fault ◽  
Wastewater Treatment Process ◽  
Reconstruction Methods

There are many sensors in a wastewater treatment process (WWTP) plant for monitoring process performance and condition. Sensor validation is essential to the success of process monitoring. In this paper, various sensor faults which can occur in WWTP are identified for taking proper remedial action at an early time. A proposed sensor fault isolation method is based on the variable reconstruction using principal component analysis (PCA). Even though several methods have been developed to identify sensor faults, they are only applicable to a static process. In other words, they cannot be successfully used to monitor severe dynamic processes such as WWTPs. We have removed this limitation by developing reconstruction methods based on a dynamic version of PCA. Artificial scenarios of sensor faults generated from the simulation benchmark have been used to validate the proposed sensor identifying methodology. Also, it is compared to a previous method to show its relative superiority in sensor fault validation in the WWTP.

scholarly journals A linear, featured-data scheme for image reconstruction in time-domain fluorescence molecular tomography

2006 ◽  
Vol 14 (16) ◽  
pp. 7109 ◽  
Author(s):  
Feng Gao ◽  
Huijuan Zhao ◽  
Yukari Tanikawa ◽  
Yukio Yamada
Keyword(s):  
Image Reconstruction ◽  
Time Domain ◽  
Fluorescence Molecular Tomography ◽  
Data Scheme

scholarly journals Multimodal imaging combining time-domain near-infrared optical tomography and continuous-wave fluorescence molecular tomography

2020 ◽  
Vol 28 (7) ◽  
pp. 9860
Author(s):  
Wuwei Ren ◽  
Jingjing Jiang ◽  
Aldo Di Costanzo Mata ◽  
Alexander Kalyanov ◽  
Jorge Ripoll ◽  
...  
Keyword(s):  
Time Domain ◽  
Multimodal Imaging ◽  
Near Infrared ◽  
Continuous Wave ◽  
Optical Tomography ◽  
Fluorescence Molecular Tomography
Sign in / Sign up

Export Citation Format

Share Document