System Analysis of Ultrasound Reflection Mode Computerized Tomography

Hiller, D.; Ermert, H.

doi:10.1109/t-su.1984.31504

Cited by 57 publications

(19 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…f(l,θ) is the scalar reflectivity function of the cross-sectional imaging plane; the integration path s traces the circular arc. The 2D cross-section reconstructed image plane denoted by F(l,θ) can be represented by the expression [7]:…”

Section: Review Of Image Reconstructionmentioning

confidence: 99%

Parallel Image Reconstruction in Real-Time Ultrasound Process Tomography for Two-phased Flow Measurements

et al. 1997

View full text Add to dashboard Cite

Section: Review Of Image Reconstructionmentioning

confidence: 99%

Parallel Image Reconstruction in Real-Time Ultrasound Process Tomography for Two-phased Flow Measurements

et al. 1997

View full text Add to dashboard Cite

“…On the other hand, the Multi-Angle Compounding Imaging (MACI) creates a single image by averaging several individual linear-scan B-mode images acquired with a diversity of angular directions (Hiller et al, 1984;Dines et al, 1987). It has been shown that MACI improves resolution, contrast, and speckleto-noise ratio (SNR) and reduces angle-dependent artifacts (Entrekin, 1999).…”

Section: Introductionmentioning

confidence: 99%

A Characterization of Ultrasonic Full Angle Spatial Compounding as a Possible Alternative for Breast Cancer Screening

Medina

Camacho

Fritsch

2015

Archives of Acoustics

View full text Add to dashboard Cite

Breast cancer screening is based on X-ray mammography, while ultrasound is considered a complementary technique with improved detection in dense tissue. However, breast cancer screening requires a technique that provides repeatable results at the inspection interval which cannot be achieved with manual breast exploration.During the last years there have appeared several approaches to overcome this limitation by means of automated ultrasonic tomography performed with motorized probes or with a large set of array transducers.This work addresses these problems by considering a quite simple and low-cost arrangement, formed with a ring of conventional medical-grade array probes which are multiplexed to the electronics to build Full Angle Spatially Compounded (FASC) images. The work analyzes the performance of such arrangement in terms of resolution and isotropy, showing by numerical modelling and experimentally that it provides high resolution and homogeneity in the whole imaged region.The implementation of this technique would provide more than one circular FASC per second and a whole breast volume image in 1-2 minutes with conventional technology, a process fast enough to be clinically useful. Moreover, the automated technique is repeatable and can be used by the clinician to perform immediately the diagnosis without requiring additional data processing.

show abstract

“…Thus, when entering an inner plane, the ca concentration may have decreased compared with a 2-d measurement. The 2-d-technique of spatial compounding can be used • to improve image quality (isotropic resolution and reduction of speckle noise and artifacts) by imaging an object in the same cross-sectional area from different viewing angles [19]- [23]. In the context of contrastenhanced imaging, spatial compounding can help to overcome limitations due to depth dependency in harmonic imaging and suppress contrast-specific artifacts [24]- [26].…”

Section: Introductionmentioning

confidence: 99%

A method to expedite data acquisition for multiple spatial-temporal analyses of tissue perfusion by contrast-enhanced ultrasound

Hansen

Huttebrauker

Wilkening

et al. 2009

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

Self Cite

View full text Add to dashboard Cite

For semiquantitative analyses of tissue perfusion using contrast-enhanced ultrasound the acquisition and processing of time intensity curves (TIC) is required. These TICs can be computed for each pixel of an image plane, yielding parametric images of classification numbers like "blood volume" and "flow rate." The expenditure of time for data acquisition and analysis typically limits semiquantitative perfusion imaging to a single image plane in 2-D. 3-D techniques, however, provide a higher diagnostic value since more information (e.g., of an entire lesion) is obtained. Moreover, spatial compounding, being a 2-D-technique where an object is imaged from different viewing angles, is known to improve image quality by reducing artifacts and speckle noise. Both techniques, 3-D and compounding, call for optimized acquisition and processing of TICs in several image planes (3-D) or in several (overlapping) sections of the same image plane (compounding) to decrease the time needed for data acquisition. Here, an approach of interleaved imaging is presented which is applicable, among others, to contrast perfusion imaging using the replenishment method. The total acquisition time is decreased by sequentially scanning image planes twice for short time spans - first, immediately after microbubble destruction to record the initial rise of the TICs, and second, a sufficient time thereafter to assess final values of the TIC. Data from both periods are combined to fit a model function from which parameters are extracted such as perfusion rate and blood volume. This approach was evaluated by in vitro measurements on a perfusion-mimicking phantom for both, individual images such as would be used for volume reconstruction in 3-D and compound images obtained from full angle spatial compounding (FASC, 360 degrees ). An error analysis is conducted to derive the deviation of the extracted parameters of the proposed method compared with the conventional one. These deviations are entailed by a reduction in acquisition time of the proposed method, which can be adjusted by several parameters, depending on the prevailing flow. Optimization strategies are proposed to find optimal values for those settings.

show abstract

System Analysis of Ultrasound Reflection Mode Computerized Tomography

Cited by 57 publications

References 15 publications

Parallel Image Reconstruction in Real-Time Ultrasound Process Tomography for Two-phased Flow Measurements

Parallel Image Reconstruction in Real-Time Ultrasound Process Tomography for Two-phased Flow Measurements

A Characterization of Ultrasonic Full Angle Spatial Compounding as a Possible Alternative for Breast Cancer Screening

A method to expedite data acquisition for multiple spatial-temporal analyses of tissue perfusion by contrast-enhanced ultrasound

Contact Info

Product

Resources

About