Multi Element Diverging Beam from a Linear Array Transducer for Transverse Cross Sectional Imaging of Carotid Artery: Simulations and Phantom Vessel Validation

Ponnle, Akinlolu A.; Hasegawa, Hideyuki; Kanai, Hiroshi

doi:10.7567/jjap.50.07hf05

Cited by 12 publications

(12 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Images were obtained from [16] which were simulated images using Field II ( [17], [18]) a MATLAB based program that can simulate all kinds of ultrasound transducers and other associated ultrasound images. Figure 2 shows a sample of a simulated B-mode ultrasound carotid artery obtained using Field II software.…”

Section: A Data Acquisitionmentioning

confidence: 99%

See 2 more Smart Citations

Cardinal Points Symmetry Landmarks Distribution Model for Segmentation of Region of Interest in Simulated B-Mode Ultrasound Carotid Artery Images

Udekwe¹,

Ponnle²

2019

EJERS

View full text Add to dashboard Cite

Measurement accuracy and understanding of geometry of Common Carotid Artery (CCA) play an important role in carotid atherosclerosis assessment and management. In order to device techniques that can accurately analyze the effects of plaques on the carotid artery, a model that can sufficiently segment the Region of Interest (ROI) in the B-mode ultrasound image of carotid artery is needed. In this paper, a new Cardinal Points Symmetry Landmarks Distribution Model (CPS-LDM) to sufficiently segment the ROI in the carotid artery B-mode ultrasound imaged in the transverse plane is developed. The developed model employs a combination of fixed landmarks (FLs) and movable landmarks (MLs) to obtain the total landmarks (TLs) that can sufficiently segment the shape of the ROI of the carotid artery. Simulated ultrasound images are used. Four FLs are fixed on each of the four ROIs of the simulated carotid artery determined by the cardinal points North (N), South (S), East (E) and West (W) drawn on the ROIs of the carotid artery. The MLs are determined by the inter-cardinal directions such as North-East (NE), North-West (NW) and so on. The CPS-LDM equation developed allows us to visualize graphically the optimum number of points that can sufficiently segment the ROIs. ImageJ2 software was used to generate the Cartesian coordinates for each landmark which were then used to generate the Shape Space Pattern (SSP) of the carotid artery ready for further statistical analysis. The results showed that the CPS-LD model is sufficiently generic and adaptable to a variety of carotid artery B-mode ultrasound image simulated under different scenarios

show abstract

Section: A Data Acquisitionmentioning

confidence: 99%

“…6 is utilized. Symmetry equations for each ROI given in equation (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) were developed.…”

Section: Movable Landmarks (Mls) Equationmentioning

confidence: 99%

See 1 more Smart Citation

Cardinal Points Symmetry Landmarks Distribution Model for Segmentation of Region of Interest in Simulated B-Mode Ultrasound Carotid Artery Images

Udekwe¹,

Ponnle²

2019

EJERS

View full text Add to dashboard Cite

show abstract

“…1. The intima-media region of the artery is a useful place to probe the diagnosis of atherosclerosis [3]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Application of Cardinal Points Symmetry Landmarks Distribution Model to B-Mode Ultrasound Images of Transverse Cross-section of Thin-walled Phantom Carotid Arteries

Udekwe

Ponnle

2019

EJERS

View full text Add to dashboard Cite

We had earlier developed a technique based on cardinal point symmetry landmark distribution model (CPS-LDM) to completely characterize the Region of Interest (ROI) of the geometric shape of thick-walled simulated B-mode ultrasound images of carotid artery imaged in the transverse plane. In this paper, this developed technique was applied to completely characterize the region of interest of the geometric shape of B-mode ultrasound images of thin-walled phantom carotid artery imaged in the transverse plane. The developed model employs a combination of fixed landmarks (FLs) and movable landmarks (MLs) to obtain the total landmarks (TLs) that can sufficiently segment the shape of the ROI of the carotid artery. For the phantom carotid arteries, three FLs are fixed on each of the four ROIs determined by the cardinal points North (N), South (S), East (E) and West (W) drawn on the ROIs of the phantom carotid artery. The MLs are determined by the inter-cardinal directions such as North-East (NE), North-West (NW) and so on. The obtained CPS-LDM equation developed allows graphical visualization the optimum number of points that can sufficiently segment the ROIs. ImageJ2 software was used to generate the Cartesian coordinates for each landmark which were then used to generate the Shape Space Pattern (SSP) of the phantom carotid artery ready for further statistical analysis. The results showed that the CPS-LD model is generic and adaptable to a variety of transverse cross-sectional B-mode ultrasound images of thin-walled phantom carotid artery

show abstract

“…[1][2][3][4][5][6] Improvements in resolution and contrast in medical ultrasound imaging are strongly desired because they facilitate accurate medical diagnosis. [7][8][9][10] The delay-and-sum (DAS) beamforming technique, a basic nonadaptive beamforming strategy, has been employed in commercial medical ultrasound devices. However, the resolution is determined by the probe's aperture size.…”

Section: Introductionmentioning

confidence: 99%

Computational complexity reduction techniques for real-time and high-resolution medical ultrasound imaging using the beam-space Capon method

Okumura

Taki

Sato

2016

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

The beam-space (BS) Capon method is an adaptive beamforming technique that reduces computational complexity. However, the complexity is not low enough for real-time imaging. Reducing the number of time-delay and transformation processes from element-space to BS signal processing is required. We propose a technique that replaces the time-delay processes by the multiplication of steering vectors and covariance matrices. In addition, we propose a compensation technique for estimating the intensity accurately. In an experimental study using a 2.0 MHz transmission frequency on a 15 ' 10.4 mm 2 region of interest, the first side-lobe level, the %6 dB beam width, the intensity's estimation error, and the calculation time of the conventional method were %15 dB, 0.70 mm, 3.2 dB, and 656 ms. Those of the proposed method were %17 dB, 0.36 mm, 1.6 dB, and 81 ms, respectively. Using our method on three CPUs achieves imaging of 37 frames/s.

show abstract

Multi Element Diverging Beam from a Linear Array Transducer for Transverse Cross Sectional Imaging of Carotid Artery: Simulations and Phantom Vessel Validation

Cited by 12 publications

References 24 publications

Cardinal Points Symmetry Landmarks Distribution Model for Segmentation of Region of Interest in Simulated B-Mode Ultrasound Carotid Artery Images

Cardinal Points Symmetry Landmarks Distribution Model for Segmentation of Region of Interest in Simulated B-Mode Ultrasound Carotid Artery Images

Application of Cardinal Points Symmetry Landmarks Distribution Model to B-Mode Ultrasound Images of Transverse Cross-section of Thin-walled Phantom Carotid Arteries

Computational complexity reduction techniques for real-time and high-resolution medical ultrasound imaging using the beam-space Capon method

Contact Info

Product

Resources

About