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Superresolution ultrasound imaging using back-projected reconstruction
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10.1121/1.2109167
/content/asa/journal/jasa/118/6/10.1121/1.2109167
http://aip.metastore.ingenta.com/content/asa/journal/jasa/118/6/10.1121/1.2109167

Figures

Image of FIG. 1.
FIG. 1.

(Color online) The experimental setup: A focused field is directed through the object plane and recorded at the image plane. This image is numerically back-projected to the object plane and reconstructed with a superresolution recovery method, using a stored beam profile image.

Image of FIG. 2.
FIG. 2.

A object placed in a Gaussian-shaped beam. The true imaging signal and object (a) do not transmit sufficient spatial frequencies to reconstruct the object (b) unless superresolution recovery is used (c).

Image of FIG. 3.
FIG. 3.

(Color online) Simulation of a object placed in a beam. The true imaging signal and object (a) do not transmit sufficient spatial frequencies to reconstruct the object (b) unless superresolution recovery is used (c).

Image of FIG. 4.
FIG. 4.

Simulation of a object placed in a step-shaped beam. The true imaging signal and object (a) do not transmit sufficient spatial frequencies to reconstruct the object (b) unless superresolution recovery is used (c).

Image of FIG. 5.
FIG. 5.

(Color online) Simulation of a object placed in a step-shaped beam. The true imaging signal and object (a) do not transmit sufficient spatial frequencies to reconstruct the object (b) unless superresolution recovery is used (c).

Image of FIG. 6.
FIG. 6.

Difference between the spectra produced by an image and candidate images containing different object positions and width. Introduction of a broadband noise was observed to flatten this surface about its global minimum.

Image of FIG. 7.
FIG. 7.

(Color online) Graphs of actual width and location of an object compared with the predicted width and location as determined using two different techniques as a function of increasing noise.

Image of FIG. 8.
FIG. 8.

(Color online) The on-axis backward-projected ultrasound signal before (dotted) and after (solid) a nylon wire is placed in the focus of a field in water.

Image of FIG. 9.
FIG. 9.

(Color online) Axial back-projections of the signal before (left) and after (right) a nylon wire is placed in the focus of a field in water.

Image of FIG. 10.
FIG. 10.

Back-projected ultrasound field amplitude without line (A1), with line (A2) and with line using superresolution. Series B shows the same but with a human hair.

Tables

Generic image for table
TABLE I.

Summary of measurements.

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/content/asa/journal/jasa/118/6/10.1121/1.2109167
2005-12-01
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Superresolution ultrasound imaging using back-projected reconstruction
http://aip.metastore.ingenta.com/content/asa/journal/jasa/118/6/10.1121/1.2109167
10.1121/1.2109167
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