Article
Neurosciences
Omar Hamam, Samuel C. Cartmell, Javier M. Romero
NEUROIMAGING CLINICS OF NORTH AMERICA
(2024)
Article
Neurosciences
Alison M. Bays
NEUROIMAGING CLINICS OF NORTH AMERICA
(2024)
Article
Acoustics
Sol R. Martinez, Emmanuel Odella, Luis E. Ibarra, Arianna Sosa Lochedino, Ana B. Wendel, Andres M. Durantini, Carlos A. Chesta, Rodrigo E. Palacios
Summary: Sonodynamic inactivation (SDI) has an advantage over optical excitation-based protocols due to the deeper penetration of ultrasound (US) excitation. In this study, we applied conjugated polymer nanoparticles (CPNs) as an efficient sonosensitizer (SS) in SDI of pathogens and characterized the sonoreactor. We found that CPNs have a germicidal effect on planktonic cultures and mature biofilms, highlighting their potential for novel inactivation protocols.
Article
Acoustics
Quentin Baudis, Tony Valier-Brasier, Regis Wunenburger
Summary: In this study, we present a detailed procedure for measuring the rheological properties of soft, highly attenuating, visco-elastic materials at ultrasonic frequencies. We use a crosslinked Polyurethane (PU) elastomer as an example and determine its complex longitudinal modulus M and shear modulus G as a function of frequency and temperature. The results show that M, G, and bulk modulus K obey the time-temperature superposition principle and can be accurately described using a fractional derivative rheological model.
Article
Acoustics
F. R. Akhmedzhanov, M. I. Elboeva, S. Z. Mirzaev
Summary: The dependence of elastic and acousto-optic properties on the direction of wave vector and polarization of acoustic and optical waves in lead molybdate crystals has been investigated. Effective photoelastic constants were determined using the Dixon method for different geometries of Bragg light diffraction. The study of the acousto-optic quality factor dependence on the direction of the wave vector of longitudinal acoustic waves in the symmetry plane revealed that the maximum and minimum values are observed when light is diffracted by pure longitudinal waves in this plane. Additionally, it was found that the acousto-optic quality factor in lead molybdate crystals is practically the same as in paratellurite crystals.
Article
Acoustics
Shrutika Sharma, Vishal Gupta, Deepa Mudgal
Summary: Poly Lactic Acid (PLA) based bone plates fabricated using Fused Deposition Modeling can have improved mechanical strength by biocompatible polydopamine (PDM) coating. The effect of ultrasonic assisted coating parameters on tensile strength of coated bone plates was investigated and compared using Response Surface Methodology (RSM) and machine learning (ML) models. The gradient boosting regression (GBReg) model outperformed other models in terms of accuracy and prediction performance for predicting the tensile strength of PDM coated bone plates.
Article
Neurosciences
Manish K. Saha
NEUROIMAGING CLINICS OF NORTH AMERICA
(2024)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jina Lee, Melissa M. Chen, Ho-Ling Liu, F. Eymen Ucisik, Max Wintermark, Vinodh A. Kumar
Summary: MR perfusion imaging plays a crucial role in the diagnosis, management, and follow-up of patients with gliomas. Based on our experience, multiparametric MR perfusion imaging improves the ability to differentiate glioma recurrence or progression from treatment-related changes compared to using a single MR perfusion technique.
MAGNETIC RESONANCE IMAGING CLINICS OF NORTH AMERICA
(2024)
Article
Radiology, Nuclear Medicine & Medical Imaging
Amit R. Patel, Christopher M. Kramer
MAGNETIC RESONANCE IMAGING CLINICS OF NORTH AMERICA
(2024)
Article
Acoustics
Brennan Dubuc
Summary: This paper investigates the effect of a finite-sized crack surface on acoustic emission generated at the crack tip in a thin metallic plate using a 3D time-domain finite element model. The study focuses on the directivity effects on the first arrivals and interprets the acoustic emission in terms of a guided mode decomposition. The results show an increase in radiation behind the crack tip for both symmetric and shear horizontal guided modes, regardless of the crack length. The surface wave traveling along the crack length appears to be one of the main factors behind this increase.
Article
Acoustics
Yuchen Liu, Mahshid Hafezi, Andrew Feeney
Summary: This study investigates the use of Nitinol, a shape memory alloy, in a Langevin power ultrasonic transducer to mitigate the influence of temperature on device performance. The results demonstrate that by controlling the microstructure of Nitinol, the nonlinear softening of the piezoelectric stack can be reduced, leading to higher and more stable vibration amplitudes. Furthermore, the use of Nitinol allows for stable resonance frequency and performance even with temperature changes and continuous operation.
Article
Acoustics
Dingpeng Wang, Xiaocen Wang, Shili Chen, Jian Li, Lin Liang, Yang Liu
Summary: This paper proposes an end-to-end ultrasonic guided wave joint learning imaging method for sparse and limited-view transducer arrays, which significantly improves the quality of imaging results by integrating sparse feature reconstruction and deep learning imaging methods.
Article
Acoustics
Kirill Kolesnik, Vijay Rajagopal, David J. Collins
Summary: Superstrate-based acoustofluidic devices offer advantages of cost, interchangeability and prevention of contamination between samples. This study analyzes the coupling layers and superstrate dimensions for efficient sound transmission, finding that a superstrate thickness of 0.55 times the acoustic wavelength maximizes acoustic coupling.
Article
Neurosciences
Selima Siala, Nabil Rahoui, Benjamin Cho, Carlos A. Zamora
NEUROIMAGING CLINICS OF NORTH AMERICA
(2024)
Article
Neurosciences
Carlos A. Zamora, Mahmud Mossa-Basha, Mauricio Castillo
Summary: Assessment of cerebral vasculopathies can be challenging, but a comprehensive understanding of different imaging methods can facilitate the process. There are various angiographic techniques with unique advantages and disadvantages, such as bolus-based methods that enhance arterial depiction and non-contrast techniques that show high-resolution arteries. MRI can assess vessel wall pathology and aid in diagnosing vasculitis and non-inflammatory vasculopathies.
NEUROIMAGING CLINICS OF NORTH AMERICA
(2024)
Article
Radiology, Nuclear Medicine & Medical Imaging
Apurva A. Bonde, Mayur Virarkar, Mohd Zahid, Sriram Jaganathan, Manuel J. Menendez, Luis Calimano, Bryan R. Foster, Danielle Fritze, Courtney L. Thomas, Pankaj Gupta
Summary: This article describes the common and uncommon appearances of gallbladder adenomyomatosis on multimodality imaging, helping differentiate it from non-benign gallbladder abnormalities, and providing important clinical and surgical management information.
Editorial Material
Radiology, Nuclear Medicine & Medical Imaging
Dheeman Futela, Suryansh Bajaj, Mihir Khunte, Xiao Wu, Seyedmehdi Payabvash, Dheeraj Gandhi, Ajay Malhotra
Article
Acoustics
Simon Schmid, Carmen Hachmann, Christian Boehm, Lion Krischer, Alexander Mendler, Jochen Kollofrath, Christian U. Grosse
Summary: This study introduces a novel method using wavefield simulation and full-waveform inversion to estimate dynamic material parameters. The method only requires one measurement and provides a more accurate determination of wave velocity. By employing high-fidelity ultrasound simulations and a suitable cost function, the inverse problem was successfully solved.
Review
Acoustics
Ahmed M. Al-Jumaily, Hassan Liaquat, Sharad Paul
Summary: This article presents a comprehensive review on the effect of various operational parameters of focused ultrasound (FUS) on the injury zone produced by ultrasound beams for different dermatological applications. The article highlights the efficient operational parameters of FUS to enhance pain relief during surgery and make skin treatment more affordable. Additionally, a prospective future technique for efficient FUS is discussed.
ULTRASOUND IN MEDICINE AND BIOLOGY
(2024)
Article
Acoustics
Celine Porte, Thomas Lisson, Matthias Kohlen, Finn von Maltzahn, Stefanie Dencks, Saskia von Stillfried, Marion Piepenbrock, Anne Rix, Anshuman Dasgupta, Patrick Koczera, Peter Boor, Elmar Stickeler, Georg Schmitz, Fabian Kiessling
Summary: This study aimed to refine ULM for breast cancer patients by optimizing the measurement protocol, identifying translational challenges, and combining ULM with shear wave elastography. The results showed that the settings for microbubble injection strongly influence ULM images, requiring optimized protocols for different indications. Patient and examiner motion were identified as the main translational challenges for ULM.
ULTRASOUND IN MEDICINE AND BIOLOGY
(2024)
