Using Backprojection Algorithm for 3D Image Reconstruction in EIT

Dunaeva, O. A.; Nikiforov, Vladimir; Karpov, A; Machin, Matthew; Tchayev, A.; Tsofin, Y.; Tsyplyonkov, V.

doi:10.1007/978-3-642-03879-2_81

Cited by 4 publications

(4 citation statements)

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“…Thus, the method of back-projection may be applied to the case when the power lines of electric field intensity are used instead of rays, the former being estimated for the case of homogeneous conductivity distribution [7].…”

Section: Electrical Impedance Imagesmentioning

confidence: 99%

“…Thus, the back-projection method in a three-dimensional image consists of the usual projection of the superficial potential difference change (as compared to the homogeneous tissues) into the object along the equipotential surfaces, but with a weight depending on the distance between the projected point and the point at which conductivity reconstruction occurs [7].…”

Section: Electrical Impedance Imagesmentioning

confidence: 99%

See 1 more Smart Citation

An Electrical Impedance Mammographic Scheme — Norms and Pathology

Karpov¹,

Kolobanov²,

Korotkova³

2015

Mammography Techniques and Review

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Section: Electrical Impedance Imagesmentioning

confidence: 99%

Section: Electrical Impedance Imagesmentioning

confidence: 99%

An Electrical Impedance Mammographic Scheme — Norms and Pathology

Karpov¹,

Kolobanov²,

Korotkova³

2015

Mammography Techniques and Review

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“…All the mentioned papers (using 3D WBP) contain in vivo images. However, there are a few papers in which the authors have only reported the results of simulation [32], or phantom-based tomography images [33,34] using 3D WBP. In [35][36][37], the authors report the statistical results, obtained utilizing MEIK and MEM in clinical applications, in addition to in vivo images.…”

Section: Introductionmentioning

confidence: 99%

Modified weighted back-projection algorithm (MWBP) for 3D electrical impedance mammography systems with the planar electrode array

Khalighi¹,

Mikaeili²

2019

Biomed. Phys. Eng. Express

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Electrical impedance mammography (EIM), as one of the EIT medical applications, is applied for diagnostics and imaging of the breast. Quality of reconstructed images in this method depends on precision of the EIM hardware and efficiency of the image reconstruction algorithm. One of the linearized methods in EIT image reconstruction is Weighted Back-Projection (WBP). The purpose of this paper is to present a novel method, which is a modified version of the current 3D WBP algorithm (MWBP), to improve the quality of reconstructed images in electrical impedance mammography. In order to calibrate the 3D WBP algorithm with regards to real equipotential surfaces and output results, some attempts have been made to model the real EIM conditions in terms of body shape and electrode positions by means of a saline-filled phantom. We have proposed a few modifications which improve the quality of images greatly, in terms of sensitivity, resolution, contrast, and accuracy in size and position of objects under imaging. The mentioned modifications contain: changing the problem assumptions, adding a new weighting function to the current 3D WBP equation, and defining an exciting radius for the pixel being reconstructed. The final results (containing phantom and in vivo images) prove the efficiency of the proposed modifications.

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“…In a short time period diagnostic criteria for early breast cancer detection were developed (3,5), as well as the method for assessment and evaluation of electrical impedance images (6). Percentile curves of age-related electrical conductivity were built up for the mammary gland status evaluation (1).…”

Section: Introductionmentioning

confidence: 99%

Diagnostic criteria for mass lesions differentiating in electrical impedance mammography

Karpov¹,

Korotkova²

2013

J. Phys.: Conf. Ser.

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Abstract. The purpose of this research was to determine the diagnostic criteria for differentiating volu metric lesions in the mammary g land in electrical impedance mammography. The research was carried out utilizing the electrical impedance computer mammograph «MEIK v.5.6» ® , which enables to acquire images of 3-D conductivity distribution layers within mamma's tissues up to 5 cm depth . The weighted reciprocal projection method was emp loyed to reconstruct the 3-D electric conductivity distribution of the examined organ. The results of 3,710 electrical impedance examinations were analyzed. The analysis of a volumetric lesion included assessment of its shape, contour, internal electrical structure and changes of the surrounding tissues. Moreover, mammary gland status was evaluated with the help of comparative and age-related electrical conductivity curves. The diagnostic chart is provided. Each criterion is measured in points. Using the numerical score for evaluation of mass and non-volumetric lesions within the mammary gland in electrical impedance mammography allowed co mparing this information to BI -RADS categories developed by American Co llege of Rad iology experts. The article is illustrated with electrical impedance mammograms and tables .

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Using Backprojection Algorithm for 3D Image Reconstruction in EIT

Cited by 4 publications

References 0 publications

An Electrical Impedance Mammographic Scheme — Norms and Pathology

An Electrical Impedance Mammographic Scheme — Norms and Pathology

Modified weighted back-projection algorithm (MWBP) for 3D electrical impedance mammography systems with the planar electrode array

Diagnostic criteria for mass lesions differentiating in electrical impedance mammography

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