TU‐EE‐A1‐06: Transrectal Fiducial Carrier for Radiographic Image Registration in Prostate Brachytherapy

Kemper, J.; Burkholder, A.; Jain, Ameet; Mustufa, Tabish; Wyrobek, K.A.; Burdette, Clif; Song, Danny Y.; Okamura, Allison M.; Fichtinger, Gabor

doi:10.1118/1.1998447

Cited by 3 publications

(1 citation statement)

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“…The distance between the FTRAC fiducial and the prostate will be about 15 cm, in which range the pose recovery and object reconstruction stabilities are adequate. The fallback plan, 55 as shown in Fig. 10͑b͒, is to place the fiducial on a rectal sheath that supports the prostate, while the TRUS probe can move unhindered inside the sheath.…”

Section: Motivating Applicationsmentioning

confidence: 99%

FTRAC—A robust fluoroscope tracking fiducial

Jain

Mustafa

et al. 2005

Medical Physics

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C-arm fluoroscopy is ubiquitous in contemporary surgery, but it lacks the ability to accurately reconstruct three-dimensional (3D) information. A major obstacle in fluoroscopic reconstruction is discerning the pose of the x-ray image, in 3D space. Optical/magnetic trackers tend to be prohibitively expensive, intrusive and cumbersome in many applications. We present single-image-based fluoroscope tracking (FTRAC) with the use of an external radiographic fiducial consisting of a mathematically optimized set of ellipses, lines, and points. This is an improvement over contemporary fiducials, which use only points. The fiducial encodes six degrees of freedom in a single image by creating a unique view from any direction. A nonlinear optimizer can rapidly compute the pose of the fiducial using this image. The current embodiment has salient attributes: small dimensions (3 x 3 x 5 cm); need not be close to the anatomy of interest; and accurately segmentable. We tested the fiducial and the pose recovery method on synthetic data and also experimentally on a precisely machined mechanical phantom. Pose recovery in phantom experiments had an accuracy of 0.56 mm in translation and 0.33 degrees in orientation. Object reconstruction had a mean error of 0.53 mm with 0.16 mm STD. The method offers accuracies similar to commercial tracking systems, and appears to be sufficiently robust for intraoperative quantitative C-arm fluoroscopy. Simulation experiments indicate that the size can be further reduced to 1 x 1 X 2 cm, with only a marginal drop in accuracy.

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Section: Motivating Applicationsmentioning

confidence: 99%

FTRAC—A robust fluoroscope tracking fiducial

Jain

Mustafa

et al. 2005

Medical Physics

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Polysaccharide-based nanosystems: a review

Kou

Faisal

Song

et al. 2022

Critical Reviews in Food Science and Nutrition

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Advancements in Adsorption Techniques for Sustainable Water Purification: A Focus on Lead Removal

Badran,

Utra,

Yussof

et al. 2023

Separations

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The long-term sustainability of the global water supply, with a paramount emphasis on cleanliness and safety, stands as a formidable challenge in our modern era. In response to this pressing issue, adsorption techniques have emerged as pivotal and widely recognized solutions for the removal of hazardous pollutants, with a particular emphasis on lead adsorption from wastewater. This comprehensive review explores the relentless advancements made in the adsorption domain, highlighting innovations using separation and purification techniques that surpass traditional metal oxide-based adsorbents. Of particular note is the growing exploration of alternative materials, such as starch, chitosan, nanoscale structures like zeolites and metal-organic frameworks, magnetic materials, and carbon-based substances for the development of inorganic adsorbents. These materials, with their remarkable capacity for nanoscale structural adjustment, possess extraordinary capabilities for effective contaminant removal, facilitating swift water purification. The literature survey for this review was conducted using the Google Scholar engine, with “adsorbents for lead remediation” as the starting keywords, resulting in approximately 6000 papers. The search was refined to focus on the last three years and specifically targeted review papers which are most relevant to lead remediation. More than 100 papers were analysed to investigate various techniques, surface modifications, and adsorbent materials for managing inorganic pollutants in water. This review also illuminates research limitations, with a specific focus on starch-based adsorbents in lead remediation. As we progress towards practical commercial applications, this review identifies challenges associated with the development of inorganic adsorbents and provides invaluable insights into future prospects. Surface modification emerges as a promising path, with the potential to substantially enhance adsorption capacity, potentially doubling or even quadrupling it. Moreover, the adsorbents demonstrate impressive regenerative capabilities, maintaining up to 90% regeneration efficiency after multiple cycles. In conclusion, starch-based adsorbents show considerable potential as effective agents for lead purification from aquatic environments. Nevertheless, the need for further research persists, emphasizing the optimization of the adsorption process and exploring the long-term stability of starch-based adsorbents in real-world scenarios.

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TU‐EE‐A1‐06: Transrectal Fiducial Carrier for Radiographic Image Registration in Prostate Brachytherapy

Cited by 3 publications

References 1 publication

FTRAC—A robust fluoroscope tracking fiducial

FTRAC—A robust fluoroscope tracking fiducial

Polysaccharide-based nanosystems: a review

Advancements in Adsorption Techniques for Sustainable Water Purification: A Focus on Lead Removal

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