Photon‐counting CT via interleaved/gapped spectral channels: Feasibility and imaging performance

2021 ◽  
Author(s):  
Xiangyang Tang ◽  
Yan Ren ◽  
Huiqiao Xie
Keyword(s):  
Photon Counting ◽  
Imaging Performance ◽  
Spectral Channels

Quantitative imaging performance of MARS spectral photon‐counting CT for radiotherapy

2020 ◽  
Vol 47 (8) ◽  
pp. 3423-3434 ◽  
Author(s):  
Mikaël Simard ◽  
Raj Kumar Panta ◽  
Stephen T. Bell ◽  
Anthony P.H. Butler ◽  
Hugo Bouchard
Keyword(s):  
Quantitative Imaging ◽  
Photon Counting ◽  
Imaging Performance

Characterization of the imaging performance of a micro-CT system based on the photon counting XPAD3/Si hybrid pixel detectors

2016 ◽  
Vol 2 (2) ◽  
pp. 025003 ◽  
Author(s):  
F Cassol ◽  
M Dupont ◽  
C Kronland-Martinet ◽  
H Ouamara ◽  
A Dawiec ◽  
...  
Keyword(s):  
Photon Counting ◽  
Micro Ct ◽  
Pixel Detectors ◽  
Ct System ◽  
Imaging Performance

OC-0585: Quantitative imaging performance of MARS spectral photon-counting CT for radiotherapy

2020 ◽  
Vol 152 ◽  
pp. S328-S329
Author(s):  
M. Simard ◽  
R. Kumar Panta ◽  
H. Prebble ◽  
A.P.H. Butler ◽  
P.H. Butler ◽  
...  
Keyword(s):  
Quantitative Imaging ◽  
Photon Counting ◽  
Imaging Performance

Imaging performance comparison between a LaBr3:Ce scintillator based and a CdTe semiconductor based photon counting compact gamma camera

2009 ◽  
Vol 36 (4) ◽  
pp. 1298-1317 ◽  
Author(s):  
P. Russo ◽  
G. Mettivier ◽  
R. Pani ◽  
R. Pellegrini ◽  
M. N. Cinti ◽  
...  
Keyword(s):  
Gamma Camera ◽  
Photon Counting ◽  
Performance Comparison ◽  
Imaging Performance

scholarly journals Evaluation of conventional imaging performance in a research whole-body CT system with a photon-counting detector array

2016 ◽  
Vol 61 (4) ◽  
pp. 1572-1595 ◽  
Author(s):  
Zhicong Yu ◽  
Shuai Leng ◽  
Steven M Jorgensen ◽  
Zhoubo Li ◽  
Ralf Gutjahr ◽  
...  
Keyword(s):  
Photon Counting ◽  
Detector Array ◽  
Whole Body ◽  
Conventional Imaging ◽  
Photon Counting Detector ◽  
Whole Body Ct ◽  
Ct System ◽  
Imaging Performance ◽  
Body Ct

scholarly journals Imaging performance of phase-contrast breast computed tomography with synchrotron radiation and a CdTe photon-counting detector

2016 ◽  
Vol 32 (5) ◽  
pp. 681-690 ◽  
Author(s):  
A. Sarno ◽  
G. Mettivier ◽  
B. Golosio ◽  
P. Oliva ◽  
G. Spandre ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Synchrotron Radiation ◽  
Phase Contrast ◽  
Photon Counting ◽  
Photon Counting Detector ◽  
Imaging Performance ◽  
Breast Computed Tomography

scholarly journals Mantis shrimp–inspired organic photodetector for simultaneous hyperspectral and polarimetric imaging

2021 ◽  
Vol 7 (10) ◽  
pp. eabe3196
Author(s):  
Ali Altaqui ◽  
Pratik Sen ◽  
Harry Schrickx ◽  
Jeromy Rech ◽  
Jin-Woo Lee ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Organic Semiconductors ◽  
Degrees Of Freedom ◽  
Temporal Data ◽  
Mantis Shrimp ◽  
Organic Photodetector ◽  
Polarimetric Imaging ◽  
Imaging Performance ◽  
Spectral Channels ◽  
Single Pixel

Combining hyperspectral and polarimetric imaging provides a powerful sensing modality with broad applications from astronomy to biology. Existing methods rely on temporal data acquisition or snapshot imaging of spatially separated detectors. These approaches incur fundamental artifacts that degrade imaging performance. To overcome these limitations, we present a stomatopod-inspired sensor capable of snapshot hyperspectral and polarization sensing in a single pixel. The design consists of stacking polarization-sensitive organic photovoltaics (P-OPVs) and polymer retarders. Multiple spectral and polarization channels are obtained by exploiting the P-OPVs’ anisotropic response and the retarders’ dispersion. We show that the design can sense 15 spectral channels over a 350-nanometer bandwidth. A detector is also experimentally demonstrated, which simultaneously registers four spectral channels and three polarization channels. The sensor showcases the myriad degrees of freedom offered by organic semiconductors that are not available in inorganics and heralds a fundamentally unexplored route for simultaneous spectral and polarimetric imaging.

Modeling the Imaging Performance of Photon Counting X-Ray Detectors

2020 ◽  
pp. 293-324
Author(s):  
Jesse Tanguay ◽  
Ian Cunningham
Keyword(s):  
Photon Counting ◽  
X Ray ◽  
Imaging Performance

Measured imaging performance of photon counting hybrid pixel X-ray detectors

2008 ◽  
Author(s):  
Franca Cassol Brunner ◽  
Jean-Claude Clemens ◽  
Charles Hemmer ◽  
Christian Morel
Keyword(s):  
Photon Counting ◽  
X Ray ◽  
Imaging Performance

scholarly journals Wide-vergence, multi-spectral adaptive optics scanning laser ophthalmoscope with diffraction-limited illumination and collection

2020 ◽  
Author(s):  
Sanam Mozaffari ◽  
Francesco Larocca ◽  
Volker Jaedicke ◽  
Pavan Tiruveedhula ◽  
Austin Roorda
Keyword(s):  
Adaptive Optics ◽  
Phase Retrieval ◽  
Collection Efficiency ◽  
Scanning Laser Ophthalmoscope ◽  
Imaging Systems ◽  
Scanning Laser ◽  
Wavefront Sensing ◽  
Imaging Results ◽  
Imaging Performance ◽  
Spectral Channels

AbstractVisualizing and assessing the function of microscopic retinal structures in the human eye is a challenging task that has been greatly facilitated by ophthalmic adaptive optics (AO). Yet, as AO imaging systems advance in functionality by employing multiple spectral channels and larger vergence ranges, achieving optimal resolution and signal-to-noise ratios (SNR) becomes difficult and is often compromised. While current-generation AO retinal imaging systems have demonstrated excellent, near diffraction-limited imaging performance over wide vergence and spectral ranges, a full theoretical and experimental analysis of an AOSLO that includes both the light delivery and collection optics has not been done, and neither has the effects of extending wavefront correction from one wavelength to imaging performance in different spectral channels. Here, we report a methodology and system design for simultaneously achieving diffraction-limited performance in both the illumination and collection paths for a wide-vergence, multi-spectral AO scanning laser ophthalmoscope (SLO) over a 1.2 diopter vergence range while correcting the wavefront in a separate wavelength. To validate the design, an AOSLO was constructed to have three imaging channels spanning different wavelength ranges (543 ± 11 nm, 680 ± 11 nm, and 840 ± 6 nm, respectively) and one near-infrared wavefront sensing channel (940 ± 5 nm). The AOSLO optics and their alignment were determined via simulations in optical and optomechanical design software and then experimentally verified by measuring the AOSLO’s illumination and collection point spread functions (PSF) for each channel using a phase retrieval technique. The collection efficiency was then measured for each channel as a function of confocal pinhole size when imaging a model eye achieving near-theoretical performance. Imaging results from healthy human adult volunteers demonstrate the system’s ability to resolve the foveal cone mosaic in all three imaging channels despite a wide spectral separation between the wavefront sensing and imaging channels.OCIS codes(110.1080) Active or adaptive optics; (170.4460) Ophthalmic optics and devices; (170.4470) Ophthalmology

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