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Feasibility of volume-of-interest (VOI) scanning technique in cone beam breast CT—a preliminary study
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10.1118/1.2948397
/content/aapm/journal/medphys/35/8/10.1118/1.2948397
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/35/8/10.1118/1.2948397
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Diagram for cone beam breast CT with VOI scanning technique.

Image of FIG. 2.
FIG. 2.

Illustration of the VOI technique and corresponding x-ray signal intensities.

Image of FIG. 3.
FIG. 3.

A stationary gantry, rotating phantom cone beam CT system with a VOI mask.

Image of FIG. 4.
FIG. 4.

Mean signal value versus noise variance. The cross and solid line represent the measured data and fitted curve, respectively.

Image of FIG. 5.
FIG. 5.

Front (a) and side (c) views of full-field cone beam CT images of a breast specimen obtained at . Front (b) and side (d) views of VOI cone beam CT images of the breast specimen with a rectangular opening.

Image of FIG. 6.
FIG. 6.

Full-field cone beam CT image (a, c) and VOI cone beam CT image (b, d) of a gelatin phantom inserted with two groups of calcifications (size ) in the center and at the edge.

Image of FIG. 7.
FIG. 7.

Comparison of CT number profiles of the VOI image and full-field cone beam CT image.

Image of FIG. 8.
FIG. 8.

Dose versus distance from the rotating axis. The vertical dashed line indicates the boundary of the VOI.

Image of FIG. 9.
FIG. 9.

Primary and scattered x-ray intensity profiles for the full-field and VOI projection images in the horizontal direction.

Image of FIG. 10.
FIG. 10.

Full-field cone beam CT image (a) and VOI cone beam CT image (b) of a low contrast phantom. The CNRs inside the VOI are 0.88 and 1.28, respectively.

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/content/aapm/journal/medphys/35/8/10.1118/1.2948397
2008-07-08
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Feasibility of volume-of-interest (VOI) scanning technique in cone beam breast CT—a preliminary study
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/35/8/10.1118/1.2948397
10.1118/1.2948397
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