Image transmission through dynamic scattering media by single-pixel photodetection

Tajahuerce, Enrique; Durán, Vicente; Clemente, Pere; Irles, Esther; Soldevila, Fernando; Andrés, Pedro; Láncis, Jesús

doi:10.1364/oe.22.016945

Cited by 196 publications

(106 citation statements)

References 29 publications

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“…In particular, we observe that, by modulating the illumination, we can better observe the inclusion for views where it is closer to the illumination source (see the vertical blue bar in the image at 180°or 225°for IN). In fact, the SPC approach measures the integral of the signal; then the imaging capability is not influenced by the scattering events followed by photons after impinging on the inclusion as occurs for the CCD [20]. These examples demonstrate the imaging capability of the proposed method and, in particular, the importance of the choice of illumination/detection patterns according to the view, the sample (shape and optical parameters) and inclusions, for both imaging and reconstruction.…”

Section: Lettermentioning

confidence: 82%

Multiple-view diffuse optical tomography system based on time-domain compressive measurements

Farina¹,

Betcke²,

Sieno³

et al. 2017

Opt. Lett.

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Compressive sensing is a powerful tool to efficiently acquire and reconstruct an image even in diffuse optical tomography (DOT) applications. In this work, a time-resolved DOT system based on structured light illumination, compressive detection, and multiple view acquisition has been proposed and experimentally validated on a biological tissue-mimicking phantom. The experimental scheme is based on two digital micromirror devices for illumination and detection modulation, in combination with a time-resolved single element detector. We fully validated the method and demonstrated both the imaging and tomographic capabilities of the system, providing state-of-the-art reconstruction quality. In the last decade, the possibility to quantitatively reconstruct absorbing, scattering, and fluorescent inclusions within in vivo organisms attracted a great deal of interest for diagnostic purposes (e.g., tumor detection) [1], functional studies (e.g., brain oximetry) [2], and molecular imaging on small animals (e.g., pharmacological research) [3]. The general measurement scheme consists of illuminating a sample and detecting the diffused light exiting it. Then, by solving the inverse problem, based on a model of photon propagation through the biological tissue, the optical parameters in each point of the sample can be reconstructed quantitatively. These modalities are usually referred to as diffuse optical tomography (DOT) or fluorescence molecular tomography (FMT) when, respectively, the absorption/ scattering or fluorescence properties are reconstructed. The performance of DOT/FMT is mainly characterized by its capability to resolve the position and shape of inhomogeneities inside the tissue, and, consequently, improve the quantification capability of their optical parameters. Previous studies have demonstrated the importance of a dense source/detector [4] and a multiple view measurement scheme [5,6] in order to increase the tomographic spatial resolution. Moreover, further data, such as spectral and temporal information, are crucial [7,8]. Temporal information provides three main advantages: (i) better disentanglement of absorption/scattering properties, (ii) temporal encoding of photon depth, and (iii) fluorescence lifetime quantification in the case of FMT. Spectral information (i.e., different excitation/detection wavelength) allows one to discriminate among tissue chromophores. Hence, DOT/FMT turns out to be a highly multidimensional problem with the drawback of a huge data set being generated. This represents a practical limitation of these techniques because of the extremely long acquisition and computational times, which are not typically compatible with clinical and preclinical needs. Hence, a reduction of the acquired data set by preserving the spatial resolution, or, more generally, the data set information content, is highly desirable.Following this concept, different studies have recently exploited the fact that a highly scattering medium (such as biological tissue) behaves as a low-pass filter in the spatial do...

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Section: Lettermentioning

confidence: 82%

Multiple-view diffuse optical tomography system based on time-domain compressive measurements

Farina¹,

Betcke²,

Sieno³

et al. 2017

Opt. Lett.

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“…The speed and quality of imaging have both been improved, such as the real-time video with the single-pixel detectors [31] and the improvement of the signal-to-noise ratio for different systems [32,33]. Moreover, some features of CGI which the traditional camera does not have have been also proposed and realized, such as 3D imaging of CGI [34], imaging of CGI through turbulence and against scattering [26,35]. They make CGI more significant in real life.…”

Section: Introductionmentioning

confidence: 99%

Imaging around corners with single-pixel detector by computational ghost imaging

Bai

Liu

et al. 2017

Optik

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We have designed a single-pixel camera with imaging around corners based on computational ghost imaging. It can obtain the image of an object when the camera cannot look at the object directly. Our imaging system explores the fact that a bucket detector in a ghost imaging setup has no spatial resolution capability. A series of experiments have been designed to confirm our predictions. This camera has potential applications for imaging around corner or other similar environments where the object cannot be observed directly.

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“…Recently, engineering applications of scattering phenomena such as imaging [1][2][3][4][5][6][7][8] and security [9][10][11] have been investigated actively. One of the major applications of imaging of absorption in the scattering medium is the optical CT (computed tomography) to human tissues such as brain and breast [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Reconstruction evaluation of intensity ratio distribution for extraction of absorber information in homogeneous scattering medium

Yamaoki

Matoba

2016

Opt Rev

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To extract effectively the absorber information embedded in a homogeneous scattering medium in the transmission geometry, a method of taking the ratio of the output intensity in a measured medium to that in a reference medium is evaluated. The reference medium is a virtual one with the same scattering coefficient distribution as that of the measured medium, but with a uniform absorption coefficient distribution. Numerical results show that the proposed method can enhance the output signal by extracting the ballistic-like component. We also apply a backprojection method to reconstruct the single absorber using many pairs of input and output intensity ratio distributions. The reconstruction position error and the quantitative measurement of absorption coefficient are discussed.

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Image transmission through dynamic scattering media by single-pixel photodetection

Cited by 196 publications

References 29 publications

Multiple-view diffuse optical tomography system based on time-domain compressive measurements

Multiple-view diffuse optical tomography system based on time-domain compressive measurements

Imaging around corners with single-pixel detector by computational ghost imaging

Reconstruction evaluation of intensity ratio distribution for extraction of absorber information in homogeneous scattering medium

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