Three-Dimensional Digital Tomosynthesis

Levakhina, Yulia

doi:10.1007/978-3-658-05697-1

Cited by 11 publications

(2 citation statements)

References 95 publications

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“…Digital tomosynthesis (DT) is an x-ray imaging technique that enables acquisition of volumetric image data using similar equipment and the same workflow as a standard projection radiography. A typical tomosynthesis system acquires data from a series of 2D projection images across a stationary detector [1][2][3]. The quality of reconstructed slices in digital tomosynthesis may suffer from the occurrence of out-ofplane artefacts caused by structures outside the focal plane.…”

Section: Introductionmentioning

confidence: 99%

Metal artefact reduction in digital tomosynthesis using component decomposition

Soloviev¹,

Wells²,

Renforth³

et al. 2023

Biomed. Phys. Eng. Express

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We propose a technique for metal artefact reduction in digital tomosynthesis reconstruction. Although the problem was addressed earlier in the literature, we suggest another approach, which is, in our opinion, simpler, and easier to implement. It is a two-stage algorithm. At the first stage, attenuation images are segmented by decomposing their intensity distributions into gaussian-like components. Statistical information contained in each component is used for pixel classification. Components corresponding to metallic objects are identified, and a pixel threshold value separating regions occupied by metal objects from the rest of the image is found. Based on this value, at the second stage, a smooth mapping of image intensity is applied. This makes dense regions transparent, resulting in the artefact reduction in reconstruction. The methodology is demonstrated by several examples.

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Section: Introductionmentioning

confidence: 99%

Metal artefact reduction in digital tomosynthesis using component decomposition

Soloviev¹,

Wells²,

Renforth³

et al. 2023

Biomed. Phys. Eng. Express

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show abstract

“…Digital tomosynthesis is a promising modality that generates slice images of the body from a series of projections acquired at limited angular range. In this aspect, digital tomosynthesis is very similar to computed tomography (CT); however, instead of acquiring projections over 360 • as in CT, the projections in a tomosynthesis scan are acquired over a limited angular range [1,2]. Therefore, the radiation dose in digital tomosynthesis is effectively reduced compared to CT [1].…”

Section: Introductionmentioning

confidence: 99%

Comparison study of noise reduction algorithms in dual energy chest digital tomosynthesis

et al. 2018

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Dual energy chest digital tomosynthesis (CDT) is a recently developed medical technique that takes advantage of both tomosynthesis and dual energy X-ray images. However, quantum noise, which occurs in dual energy X-ray images, strongly interferes with diagnosis in various clinical situations. Therefore, noise reduction is necessary in dual energy CDT. In this study, noise-compensating algorithms, including a simple smoothing of high-energy images (SSH) and anti-correlated noise reduction (ACNR), were evaluated in a CDT system. We used a newly developed prototype CDT system and anthropomorphic chest phantom for experimental studies. The resulting images demonstrated that dual energy CDT can selectively image anatomical structures, such as bone and soft tissue. Among the resulting images, those acquired with ACNR showed the best image quality. Both coefficient of variation and contrast to noise ratio (CNR) were the highest in ACNR among the three different dual energy techniques, and the CNR of bone was significantly improved compared to the reconstructed images acquired at a single energy. This study demonstrated the clinical value of dual energy CDT and quantitatively showed that ACNR is the most suitable among the three developed dual energy techniques, including standard log subtraction, SSH, and ACNR.

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Tracking of Particles in Froth Using Neutron Imaging

Heitkam

Lappan

Eckert

et al. 2019

Chemie Ingenieur Technik

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The movement of hydrophobic particles in a rising froth column is investigated. Gadolinium particles are hydrophobized and floated by means of small air bubbles. The generated froth is investigated by neutron imaging. Particles are identified by correlating the resulting radiographs with an artificial template of a typical particle and subsequent scanning for local maxima. The movement of the particles in the froth was analyzed for different froth stabilities, which resulted from various concentrations of the frother sodium oleate. Decreasing froth stability leads to lower superficial vertical particle velocity and to higher horizontal diffusion of particles due to bubble rupture.

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Three-Dimensional Digital Tomosynthesis

Cited by 11 publications

References 95 publications

Metal artefact reduction in digital tomosynthesis using component decomposition

Metal artefact reduction in digital tomosynthesis using component decomposition

Comparison study of noise reduction algorithms in dual energy chest digital tomosynthesis

Tracking of Particles in Froth Using Neutron Imaging

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