Photoacoustic Generation with Surface Noble Metal Nanostructures

Mikitchuk, A. P.; Kozadaev, K. V.

doi:10.1134/s106378261814018x

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…Then, set the boundary conditions should be chosen. Optoacoustic transducer consisting of monolayer of monodisperse metal NPs on a substrate (optical fiber edge) has been simulted with the CST Microwave Studio SE [160,163]. Surface nanostructure simulation is realized using the unit cell boundary conditions (translation is carried out in two dimensions to infinity).…”

Section: Multiphysics Simulation Of Optoacoustic Transducers Based On...mentioning

confidence: 99%

Current state of the research on optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interferometric receivers

Mikitchuk,

Girshova,

Nikolaev

2023

Computer Optics

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Section: Multiphysics Simulation Of Optoacoustic Transducers Based On...mentioning

confidence: 99%

Current state of the research on optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interferometric receivers

Mikitchuk,

Girshova,

Nikolaev

2023

Computer Optics

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“…Since the PDMS composites are optically transparent for commonly used laser wavelengths, optical absorbing materials have to be incorporated. Several materials have been proposed in previous works, including carbon nanotubes [ 15 , 16 ], carbon black [ 17 ], organic dyes [ 18 – 20 ], metallic nanoparticles [ 21 , 22 ], quantum dots [ 23 ], graphene [ 24 ] and candle soot [ 25 , 26 ]. For ultrasound reception, resonance-based acoustic sensors on the optical fibre tips are typically used to detect ultrasound reflections [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Miniaturised dual-modality all-optical ultrasound probe for laser interstitial thermal therapy (LITT) monitoring

Zhang¹,

Bodian

Zhang³

et al. 2023

Biomed. Opt. Express

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All-optical ultrasound (OpUS) has emerged as an imaging paradigm well-suited to minimally invasive imaging due to its ability to provide high resolution imaging from miniaturised fibre optic devices. Here, we report a fibre optic device capable of concurrent laser interstitial thermal therapy (LITT) and real-time in situ all-optical ultrasound imaging for lesion monitoring. The device comprised three optical fibres: one each for ultrasound transmission, reception and thermal therapy light delivery. This device had a total lateral dimension of <1 mm and was integrated into a medical needle. Simultaneous LITT and monitoring were performed on ex vivo lamb kidney with lesion depth tracked using M-mode OpUS imaging. Using one set of laser energy parameters for LITT (5 W, 60 s), the lesion depth varied from 3.3 mm to 8.3 mm. In all cases, the full lesion depth could be visualised and measured with the OpUS images and there was a good statistical agreement with stereomicroscope images acquired after ablation (t=1.36, p=0.18). This work demonstrates the feasibility and potential of OpUS to guide LITT in tumour resection.

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“…However, PDMS is transparent at commonly used laser wavelengths, and as such, requires the integration of an optically absorbing material. Various materials have been used for this purpose, including carbon nanotubes [30][31][32][33] , carbon black 34 , candle soot [35][36][37] , organic dyes 38 , quantum dots 39 , metallic nanoparticles [40][41][42] and graphene 43 .…”

mentioning

confidence: 99%

Dual-modality fibre optic probe for simultaneous ablation and ultrasound imaging

Zhang

Beard

et al. 2022

Commun Eng

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All-optical ultrasound (OpUS) is an emerging high resolution imaging paradigm utilising optical fibres. This allows both therapeutic and imaging modalities to be integrated into devices with dimensions small enough for minimally invasive surgical applications. Here we report a dual-modality fibre optic probe that synchronously performs laser ablation and real-time all-optical ultrasound imaging for ablation monitoring. The device comprises three optical fibres: one each for transmission and reception of ultrasound, and one for the delivery of laser light for ablation. The total device diameter is < 1 mm. Ablation monitoring was carried out on porcine liver and heart tissue ex vivo with ablation depth tracked using all-optical M-mode ultrasound imaging and lesion boundary identification using a segmentation algorithm. Ablation depths up to 2.1 mm were visualised with a good correspondence between the ultrasound depth measurements and visual inspection of the lesions using stereomicroscopy. This work demonstrates the potential for OpUS probes to guide minimally invasive ablation procedures in real time.

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Photoacoustic Generation with Surface Noble Metal Nanostructures

Cited by 7 publications

References 8 publications

Current state of the research on optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interferometric receivers

Current state of the research on optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interferometric receivers

Miniaturised dual-modality all-optical ultrasound probe for laser interstitial thermal therapy (LITT) monitoring

Dual-modality fibre optic probe for simultaneous ablation and ultrasound imaging

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