36. Generation of 3D prostate models for computerized cryosurgery training

Shimada, Kenji; Furuhata, Tomotake; Song, Inho; Sehrawat, Anjali; Rabin, Yoed

doi:10.1016/j.cryobiol.2011.09.039

Cited by 2 publications

(4 citation statements)

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“…As a part of an ongoing project to develop computerized tools for cryosurgical training, 5,28 the current study presents a mathematical method for real-time simulations of US imaging artifacts. A six-step scheme is proposed to generate the imaging artifacts, and GPU-based real-time implementation strategies are discussed.…”

Section: Discussionmentioning

confidence: 99%

“…The proposed implementation relies on a previously developed scheme for GPU-based bioheat transfer simulations of cryosurgery. 26,27,28 The temperature field generated by bioheat transfer simulations is used as an input for US artifacts calculations.…”

Section: Discussionmentioning

confidence: 99%

“…The 3D shape of the prostate was segmented using a previously developed semi-automated method [28]. Once the 3D shape of the prostate was reconstructed, an array of cryoprobes was virtually placed at a single insertion depth, using a computer-generated optimized layout based on the bubble-packing method [18].…”

Section: Methodsmentioning

confidence: 99%

“…A framework for parallel computation of bioheat transfer during cryosurgery has been established previously and is adopted here as a choice of practice for step I of the proposed method. 27,28 Results of this simulation are used to evaluate the local material properties in step II. As appropriate, linear interpolation is used to determine the acoustic properties and their derivatives at the necessary locations within the domain.…”

Section: Methodsmentioning

confidence: 99%

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GPU-Based Simulation of Ultrasound Imaging Artifacts for Cryosurgery Training

Keelan

Shimada

Rabin

2016

Technol Cancer Res Treat

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This study presents an efficient computational technique for the simulation of ultrasound imaging artifacts associated with cryosurgery based on nonlinear ray-tracing. This study is part of an ongoing effort to develop computerized training tools for cryosurgery, with prostate cryosurgery as a development model. The capability of performing virtual cryosurgical procedures on a variety of test cases is essential for effective surgical training. Simulated ultrasound imaging artifacts include reverberation and reflection of the cryoprobes in the unfrozen tissue, reflections caused by the freezing front, shadowing caused by the frozen region, and tissue-property changes in repeated freeze-thaw cycles procedures. The simulated artifacts appear to preserve the key features observed in a clinical setting. This study displays an example of how training may benefit from toggling between the undisturbed ultrasound image, the simulated temperature field, the simulated imaging artifacts, and an augmented hybrid presentation of the temperature field superimposed on the ultrasound image. The proposed method is demonstrated on a graphic processing unit (GPU) at 100 fps, on a mid-range personal workstation, at two orders of magnitude faster than a typical cryoprocedure. This performance is based on computation with C++ accelerated massive parallelism (AMP) and its interoperability with the DirectX rendering API.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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GPU-Based Simulation of Ultrasound Imaging Artifacts for Cryosurgery Training

Keelan

Shimada

Rabin

2016

Technol Cancer Res Treat

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Characterization of a CMOS sensing core for ultra-miniature wireless implantable temperature sensors with application to cryomedicine

Khairi

Thaokar

Fedder

et al. 2014

Medical Engineering & Physics

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In effort to improve thermal control in minimally invasive cryosurgery, the concept of a miniature, wireless, implantable sensing unit has been developed recently. The sensing unit integrates a wireless power delivery mechanism, wireless communication means, and a sensing core—the subject matter of the current study. The current study presents a CMOS ultra-miniature PTAT temperature sensing core and focuses on design principles, fabrication of a proof-of-concept, and characterization in a cryogenic environment. For this purpose, a 100μm × 400μm sensing core prototype has been fabricated using a 130nm CMOS process. The senor has shown to operate between −180°C and room temperature, to consume power of less than 1μW, and to have an uncertainty range of 1.4°C and non-linearity of 1.1%. Results of this study suggest that the sensing core is ready to be integrated in the sensing unit, where system integration is the subject matter of a parallel effort.

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36. Generation of 3D prostate models for computerized cryosurgery training

Cited by 2 publications

References 0 publications

GPU-Based Simulation of Ultrasound Imaging Artifacts for Cryosurgery Training

GPU-Based Simulation of Ultrasound Imaging Artifacts for Cryosurgery Training

Characterization of a CMOS sensing core for ultra-miniature wireless implantable temperature sensors with application to cryomedicine

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