Signal detectability in diffusive media using phased arrays in conjunction with detector arrays

Dongyel Kang, Matthew A Kupinski

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We investigate Hotelling observer performance (i.e., signal detectability) of a phased array system for tasks of detecting small inhomogeneities and distinguishing adjacent abnormalities in uniform diffusive media. Unlike conventional phased array systems where a single detector is located on the interface between two sources, we consider a detector array, such as a CCD, on a phantom exit surface for calculating the Hotelling observer detectability. The signal detectability for adjacent small abnormalities (2mm displacement) for the CCD-based phased array is related to the resolution of reconstructed images. Simulations show that acquiring high-dimensional data from a detector array in a phased array system dramatically improves the detectability for both tasks when compared to conventional single detector measurements, especially at low modulation frequencies. It is also observed in all studied cases that there exists the modulation frequency optimizing CCD-based phased array systems, where detectability for both tasks is consistently high. These results imply that the CCD-based phased array has the potential to achieve high resolution and signal detectability in tomographic diffusive imaging while operating at a very low modulation frequency. The effect of other configuration parameters, such as a detector pixel size, on the observer performance is also discussed.

Original languageEnglish (US)
Pages (from-to)12261-12274
Number of pages14
JournalOptics Express
Volume19
Issue number13
DOIs
StatePublished - Jun 20 2011

Fingerprint

phased arrays
charge coupled devices
detectors
frequency modulation
abnormalities
inhomogeneity
pixels
high resolution
configurations
simulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Signal detectability in diffusive media using phased arrays in conjunction with detector arrays. / Kang, Dongyel; Kupinski, Matthew A.

In: Optics Express, Vol. 19, No. 13, 20.06.2011, p. 12261-12274.

Research output: Contribution to journalArticle

@article{facebf249c874c5386829eef0014f767,
title = "Signal detectability in diffusive media using phased arrays in conjunction with detector arrays",
abstract = "We investigate Hotelling observer performance (i.e., signal detectability) of a phased array system for tasks of detecting small inhomogeneities and distinguishing adjacent abnormalities in uniform diffusive media. Unlike conventional phased array systems where a single detector is located on the interface between two sources, we consider a detector array, such as a CCD, on a phantom exit surface for calculating the Hotelling observer detectability. The signal detectability for adjacent small abnormalities (2mm displacement) for the CCD-based phased array is related to the resolution of reconstructed images. Simulations show that acquiring high-dimensional data from a detector array in a phased array system dramatically improves the detectability for both tasks when compared to conventional single detector measurements, especially at low modulation frequencies. It is also observed in all studied cases that there exists the modulation frequency optimizing CCD-based phased array systems, where detectability for both tasks is consistently high. These results imply that the CCD-based phased array has the potential to achieve high resolution and signal detectability in tomographic diffusive imaging while operating at a very low modulation frequency. The effect of other configuration parameters, such as a detector pixel size, on the observer performance is also discussed.",
author = "Dongyel Kang and Kupinski, {Matthew A}",
year = "2011",
month = "6",
day = "20",
doi = "10.1364/OE.19.012261",
language = "English (US)",
volume = "19",
pages = "12261--12274",
journal = "Optics Express",
issn = "1094-4087",
publisher = "The Optical Society",
number = "13",

}

TY - JOUR

T1 - Signal detectability in diffusive media using phased arrays in conjunction with detector arrays

AU - Kang, Dongyel

AU - Kupinski, Matthew A

PY - 2011/6/20

Y1 - 2011/6/20

N2 - We investigate Hotelling observer performance (i.e., signal detectability) of a phased array system for tasks of detecting small inhomogeneities and distinguishing adjacent abnormalities in uniform diffusive media. Unlike conventional phased array systems where a single detector is located on the interface between two sources, we consider a detector array, such as a CCD, on a phantom exit surface for calculating the Hotelling observer detectability. The signal detectability for adjacent small abnormalities (2mm displacement) for the CCD-based phased array is related to the resolution of reconstructed images. Simulations show that acquiring high-dimensional data from a detector array in a phased array system dramatically improves the detectability for both tasks when compared to conventional single detector measurements, especially at low modulation frequencies. It is also observed in all studied cases that there exists the modulation frequency optimizing CCD-based phased array systems, where detectability for both tasks is consistently high. These results imply that the CCD-based phased array has the potential to achieve high resolution and signal detectability in tomographic diffusive imaging while operating at a very low modulation frequency. The effect of other configuration parameters, such as a detector pixel size, on the observer performance is also discussed.

AB - We investigate Hotelling observer performance (i.e., signal detectability) of a phased array system for tasks of detecting small inhomogeneities and distinguishing adjacent abnormalities in uniform diffusive media. Unlike conventional phased array systems where a single detector is located on the interface between two sources, we consider a detector array, such as a CCD, on a phantom exit surface for calculating the Hotelling observer detectability. The signal detectability for adjacent small abnormalities (2mm displacement) for the CCD-based phased array is related to the resolution of reconstructed images. Simulations show that acquiring high-dimensional data from a detector array in a phased array system dramatically improves the detectability for both tasks when compared to conventional single detector measurements, especially at low modulation frequencies. It is also observed in all studied cases that there exists the modulation frequency optimizing CCD-based phased array systems, where detectability for both tasks is consistently high. These results imply that the CCD-based phased array has the potential to achieve high resolution and signal detectability in tomographic diffusive imaging while operating at a very low modulation frequency. The effect of other configuration parameters, such as a detector pixel size, on the observer performance is also discussed.

UR - http://www.scopus.com/inward/record.url?scp=79959461298&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79959461298&partnerID=8YFLogxK

U2 - 10.1364/OE.19.012261

DO - 10.1364/OE.19.012261

M3 - Article

C2 - 21716463

AN - SCOPUS:79959461298

VL - 19

SP - 12261

EP - 12274

JO - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 13

ER -