Feasibility of vibro‐acoustography with a quasi‐2D ultrasound array transducer for detection and localizing of permanent prostate brachytherapy seeds: A pilot <i>ex vivo</i> study

Mehrmohammadi, Mohammad; Alizad, Azra; Kinnick, Randall R.; Davis, Brian J.; Fatemi, Mostafa

doi:10.1118/1.4893532

Cited by 4 publications

(2 citation statements)

References 65 publications

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“…In the CT image shown in figure 9(b), the seed cross sections are easily identifiable as hyperdense objects; only slight streaking artifacts are noted. This figure demonstrates similar appearance to postimplant CT images of human prostates [49][50][51]. From these clinical-like images, it is evident that even in this proof of concept with a non-optimized implementation, endoDPT relative to CT was able to achieve a higher level of qualitative image quality, resulting in improved visualization of the LDRBT seeds.…”

Section: Discussionmentioning

confidence: 63%

Endorectal digital prostate tomosynthesis (endoDPT): a proof-of-concept study

Steiner¹,

Matthews²,

Jia³

2021

Biomed. Phys. Eng. Express

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In this study we present endorectal digital prostate tomosynthesis (endoDPT), a proposed method of high resolution prostate imaging using an endorectal x-ray sensor and an external x-ray source. endoDPT may be useful for visualizing the fine detail of small structures such as low dose rate brachytherapy (LDRBT) seeds that are difficult to visualize with current methods. The resolution of endoDPT was characterized through measurement of the modulation transfer function (MTF) and artifact spread function (ASF) in computational and physical phantoms. The qualitative resolution of endoDPT was assessed relative to computed tomography (CT) through imaging of LDRBT seeds implanted in ex vivo canine prostates. The x-ray sensor MTF reached 10% at 11.50 mm−1, the reconstruction algorithm MTF reached a maximum at 7.08 mm−1, and the ASF was 2.5 mm (full-width at half-maximum). Fine structures in LDRBT seeds like the 0.05 mm thick shell were visible with endoDPT but not CT. All endoDPT images exhibited an overshoot artifact. The measured MTFs were consistent with other studies using similar x-ray sensors and demonstrated improved resolution compared to digital breast tomosynthesis; this result was due to the smaller endoDPT x-ray sensor detection element size and quantitatively demonstrates the high resolution of endoDPT. The ASF demonstrated worse depth resolution compared to in-plane resolution, due to partial angular sampling; partial angular sampling also caused the observed overshoot artifact in the endoDPT images. However, endoDPT still was able to visualize fine structures such as the LDRBT seed shell to a much higher degree than CT. This high-resolution visualization may be useful for improvements in patient specific LDRBT dosimetry. Overall, these results indicate endoDPT is capable of high in-plane spatial resolution and is thus well poised for optimization and studies assessing clinical utility.

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Section: Discussionmentioning

confidence: 63%

Endorectal digital prostate tomosynthesis (endoDPT): a proof-of-concept study

Steiner¹,

Matthews²,

Jia³

2021

Biomed. Phys. Eng. Express

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“…The clinical applications of vibroacoustography for breast imaging can be found in [64]- [66]. Applications of vibro-acoustography for other organs, such as thyroid [67], prostate [68]- [70], kidney [71] and peripheral arteries [72] have been reported. Review articles on vibroacoustography and its potential applications in medicine are presented in [58], and more recently in [73].…”

Section: B1 Biomedical Applicationsmentioning

confidence: 99%

Acoustic Radiation Force: A Review of Four Mechanisms for Biomedical Applications

Sarvazyan

Руденко

Fatemi

2021

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

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Radiation force is a universal phenomenon in any wave motion where the wave energy produces a static or transient force on the propagation medium. The theory of acoustic radiation force (ARF) dates back to the early 19th century. In recent years, there has been an increasing interest in the biomedical applications of ARF. Following a brief history of acoustic radiation force, this paper describes a concise theory of ARF under four physical mechanisms of radiation force generation in tissue-like media. These mechanisms are primarily based on the dissipation of acoustic energy of propagating waves, the reflection of the incident wave, gradients of the compressional wave speeds, and the spatial variations of energy density in standing acoustic waves.Examples describing some of the practical applications of ARF under each mechanism are presented. This paper concludes with a discussion on selected ideas for potential future applications of ARF in biomedicine.

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Research Progress of Vibro-Acoustography Technology

李

2024

ACM

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Feasibility of vibro‐acoustography with a quasi‐2D ultrasound array transducer for detection and localizing of permanent prostate brachytherapy seeds: A pilot ex vivo study

Cited by 4 publications

References 65 publications

Endorectal digital prostate tomosynthesis (endoDPT): a proof-of-concept study

Endorectal digital prostate tomosynthesis (endoDPT): a proof-of-concept study

Acoustic Radiation Force: A Review of Four Mechanisms for Biomedical Applications

Research Progress of Vibro-Acoustography Technology

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