Tomosynthesis reconstruction

This state-of-the-art imaging technology offers high quality multi-slice images to visualize the part which was invisible by the conventional plain radiography, in a simple and quick workflow, and at low exposure dose. Therefore, Tomosynthesis is now spotlighted more and more in the world. It is a new type of imaging technology that fuses cone-beam CT reconstruction with digital image processing to produce images specified cross sections from a single tomography scan.

Tomosynthesis reconstruction

History[ edit ] The concept of tomosynthesis was derived from the work of Ziedses des Plantes, who developed methods of reconstructing an arbitrary number of planes from a set of projections.

Tomosynthesis reconstruction

Though this idea was displaced by the advent of computed tomography, tomosynthesis later gained interest as a low-dose tomographic alternative to CT. Due to partial data sampling with very few projections, approximation algorithms have to be used.

Filtered back projection and iterative, expectation-maximization algorithms have both been used to reconstruct the data.


Iterative algorithms based upon expectation maximization are most commonly used, but are computationally intensive. Some manufacturers have produced practical systems using off-the-shelf GPUs to perform the reconstruction in a few seconds. However, though there are some similarities to CT, it is a separate technique.

Digital tomosynthesis, on the other hand, only uses a limited rotation angle e. This incomplete set of projections is digitally processed to yield images similar to conventional tomography with a limited depth of field.

Because the image processing is digital, a series of slices at different depths and with different thicknesses can be reconstructed from the same acquisition.

However, since fewer projections are needed than CT to perform the reconstruction, radiation exposure and cost are both reduced.

In DBT, like conventional mammography, compression is used to improve image quality and decreases radiation dose. The laminographic imaging technique dates to the s and belongs to the category of geometric or linear tomography.

However, the higher resolution detectors permit very high in-plane resolution, even if the Z-axis resolution is less. The primary interest in DBT is in breast imaging, as an extension to mammographywhere it offers better detection rates with little extra increase in radiation.

Please expand the section to include this information. Further details may exist on the talk page. July Musculoskeletal imaging[ edit ] Tomosynthesis has a much more limited depth of field than does CT.

For this reason, it likely will not be able to replace CT for the evaluation of the deeper organs of the body. However, since bones are often near the skin, multiple musculoskeletal applications of tomosynthesis have been studied, most of which have mostly been used in research with limited use in everyday practice.

Evaluation of fractures[ edit ] Tomosynthesis has been compared to both radiography and CT for the evaluation of healing fractures, especially in the presence of hardware. In a study of patients with wrist fractures, digital tomosynthesis was shown to enable detection of more fractures than radiography while simultaneously providing lower metal artifact than radiography.

The radiation dose of digital tomosynthesis was very close to that of digital radiography. Technical Principles and Clinical Update". European Journal of Radiology. Physics in Medicine and Biology.Advanced Application Technology Top. Tomosynthesis, making the invisible visible.

1st Edition

”Tomosynthesis” is a coined term from ‘Tomography’ and ‘Synthesis’. It is a new type of imaging technology that fuses cone-beam CT reconstruction with digital image processing to produce images specified cross sections from a single tomography scan.

dissertation approval image reconstruction and imaging configuration optimization with a novel nanotechnology enabled breast tomosynthesis multi-beam x-ray system.

Tomosynthesis reconstruction is a far more difficult problem than conventional CT, because in tomosynthesis an incomplete and sparse set of projection data is acquired.

Breast tomosynthesis adds the additional burden of very high resolution projection images which pose a significant information processing challenge. STATE OF THE ART Radiology: Volume Digital Breast Tomosynthesis: State of the Art1 This topical review on digital breast tomosynthesis (DBT) reconstruction algorithms.

n Studies in screening populations show a statistically significant reduction in recall rate with two-. tomosynthesis reconstruction Yao Lu, Heang-Ping Chan, Jun Wei and Lubomir M Hadjiiski Department of Radiology, University of Michigan, Ann Arbor, MI , USA E-mail: [email protected] Received 26 April , in final form 23 November .

Tomosynthesis reconstruction

We developed a novel digital tomosynthesis (DTS) reconstruction method using a deformation field map to optimally estimate volumetric information in DTS images.

The deformation field map is solved by using prior information, a deformation model, and new projection data.

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