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Journal of Therapeutic Ultrasound

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https://www.readbyqxmd.com/read/28331611/long-term-efficacy-of-ultrasound-guided-high-intensity-focused-ultrasound-treatment-of-breast-fibroadenoma
#1
Roussanka Kovatcheva, Katja Zaletel, Jordan Vlahov, Julian Stoinov
BACKGROUND: To assess the long term efficacy and tolerability of one or two ultrasound (US)-guided high-intensity focused ultrasound (HIFU) treatment in patients with breast fibroadenoma (FA). METHODS: Twenty patients with 26 FA were selected for US-guided HIFU. The therapy was performed in one or two sessions. FA volume was assessed before and followed up to 24 months after the last HIFU. After each treatment, adverse events were evaluated. RESULTS: In 19/26 FA (73...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28265413/microvessel-rupture-induced-by-high-intensity-therapeutic-ultrasound-a-study-of-parameter-sensitivity-in-a-simple-in-vivo-model
#2
Yeonho Kim, Marjan Nabili, Priyanka Acharya, Asis Lopez, Matthew R Myers
BACKGROUND: Safety analyses of transcranial therapeutic ultrasound procedures require knowledge of the dependence of the rupture probability and rupture time upon sonication parameters. As previous vessel-rupture studies have concentrated on a specific set of exposure conditions, there is a need for more comprehensive parametric studies. METHODS: Probability of rupture and rupture times were measured by exposing the large blood vessel of a live earthworm to high-intensity focused ultrasound pulse trains of various characteristics...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28228966/objective-image-analysis-of-real-time-three-dimensional-intraoperative-ultrasound-for-intrinsic-brain-tumour-surgery
#3
Sophie J Camp, Vasileios Apostolopoulos, Vasileios Raptopoulos, Amrish Mehta, Kevin O'Neill, Mohammed Awad, Babar Vaqas, David Peterson, Federico Roncaroli, Dipankar Nandi
BACKGROUND: There is growing evidence that maximal surgical resection of primary intrinsic brain tumours is beneficial, both by improving progression free and overall survival and also by facilitating postoperative chemotherapy and radiotherapy. Hence, there has been an increase in the popularity of real-time intraoperative imaging in brain tumour surgery. The complex theatre arrangements, prohibitive cost and prolonged theatre time of intraoperative MRI have restricted its application...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28194274/moderate-to-deep-sedation-technique-using-propofol-and-ketamine-allowing-synchronised-breathing-for-magnetic-resonance-high-intensity-focused-ultrasound-mr-hifu-treatment-for-uterine-fibroids-a-pilot-study
#4
Hermanus H B Vaessen, F M Knuttel, J M M van Breugel, M E Ikink, J M Dieleman, M A A J van den Bosch, J T A Knape
BACKGROUND: Magnetic resonance high-intensity focused ultrasound (MR-HIFU) treatment for uterine fibroids is rapidly gaining popularity as a treatment modality. This procedure is generally uncomfortable, painful, and requires minimal or absence of movement and an MR-HIFU synchronised breathing pattern of the patient. Procedural sedation and analgesia protocols have become the standard practice in interventional radiology departments worldwide. The aim of this study was to explore if a sedation regimen with low-dose propofol and ketamine performed by trained non-medical sedation practitioners could result in relief of discomfort for the patient and in adequate working conditions for MR-HIFU treatment for uterine fibroids...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28174660/mrgfus-for-desmoid-tumors-within-the-thigh-early-clinical-experiences
#5
Matthew D Bucknor, Viola Rieke
BACKGROUND: Desmoid tumors are benign but locally aggressive non-malignant tumors derived from fibroblasts. Surgery, chemotherapy, and radiation therapy have been the mainstay of treatment, but recurrence is common and side effects can result in significant morbidity. In this case series, we highlight our experiences performing treatments in the thigh, including strategies for optimizing ablation size and safety. CASE PRESENTATION: Since December 2014, 14 magnetic resonance-guided focused ultrasound (MRgFUS) treatments for desmoid tumors were performed at our institution in seven patients...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28149518/why-we-should-care-about-soft-tissue-interfaces-when-applying-ultrasonic-diathermy-an-experimental-and-computer-simulation-study
#6
Thaís Pionório Omena, Aldo José Fontes-Pereira, Rejane Medeiros Costa, Ricardo Jorge Simões, Marco Antônio von Krüger, Wagner Coelho de Albuquerque Pereira
BACKGROUND: One goal of therapeutic ultrasound is enabling heat generation in tissue. Ultrasound application protocols typically neglect these processes of absorption and backscatter/reflection at the skin/fat, fat/muscle, and muscle/bone interfaces. The aim of this study was to investigate the heating process at interfaces close to the transducer and the bone with the aid of computer simulation and tissue-mimicking materials (phantoms). METHODS: The experimental setup consists of physiotherapeutic ultrasound equipment for irradiation, two layers of soft tissue-mimicking material, and one with and one without an additional layer of bone-mimicking material...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28127427/an-evaluation-of-the-sonoporation-potential-of-low-boiling-point-phase-change-ultrasound-contrast-agents-in-vitro
#7
Samantha M Fix, Anthony Novell, Yeoheung Yun, Paul A Dayton, Christopher B Arena
BACKGROUND: Phase-change ultrasound contrast agents (PCCAs) offer a solution to the inherent limitations associated with using microbubbles for sonoporation; they are characterized by prolonged circulation lifetimes, and their nanometer-scale sizes may allow for passive accumulation in solid tumors. As a first step towards the goal of extravascular cell permeabilization, we aim to characterize the sonoporation potential of a low-boiling point formulation of PCCAs in vitro. METHODS: Parameters to induce acoustic droplet vaporization and subsequent microbubble cavitation were optimized in vitro using high-speed optical microscopy...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28127426/mri-guided-coupling-for-a-focused-ultrasound-system-using-a-top-to-bottom-propagation
#8
Marinos Yiannakou, George Menikou, Christos Yiallouras, Christakis Damianou
BACKGROUND: A novel magnetic resonance imaging (MRI)-conditional coupling system was developed that accommodates a focused ultrasound (FUS) transducer. With this coupling system, the transducer can access targets from top to bottom. The intended clinical application is treatment of fibroids using FUS with the patient placed in supine position. METHODS: The coupling system was manufactured using a rapid prototyping device using acrylonitrile butadiene styrene (ABS) plastic...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27980785/fast-and-high-temperature-hyperthermia-coupled-with-radiotherapy-as-a-possible-new-treatment-for-glioblastoma
#9
Giovanni Borasi, Alan Nahum, Margarethus M Paulides, Gibin Powathil, Giorgio Russo, Laura Fariselli, Debora Lamia, Roberta Cirincione, Giusi Irma Forte, Cristian Borrazzo, Barbara Caccia, Elisabetta di Castro, Silvia Pozzi, Maria Carla Gilardi
BACKGROUND: A new transcranial focused ultrasound device has been developed that can induce hyperthermia in a large tissue volume. The purpose of this work is to investigate theoretically how glioblastoma multiforme (GBM) can be effectively treated by combining the fast hyperthermia generated by this focused ultrasound device with external beam radiotherapy. METHODS/DESIGN: To investigate the effect of tumor growth, we have developed a mathematical description of GBM proliferation and diffusion in the context of reaction-diffusion theory...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27980784/rapid-full-wave-phase-aberration-correction-method-for-transcranial-high-intensity-focused-ultrasound-therapies
#10
Scott Almquist, Dennis L Parker, Douglas A Christensen
BACKGROUND: Non-invasive high-intensity focused ultrasound (HIFU) can be used to treat a variety of disorders, including those in the brain. However, the differences in acoustic properties between the skull and the surrounding soft tissue cause aberrations in the path of the ultrasonic beam, hindering or preventing treatment. METHODS: We present a method for correcting these aberrations that is fast, full-wave, and allows for corrections at multiple treatment locations...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27957332/uncertainty-estimation-for-temperature-measurement-with-diagnostic-ultrasound
#11
Tina A Fuhrmann, Olga Georg, Julian Haller, Klaus-V Jenderka, Volker Wilkens
BACKGROUND: Ultrasound therapies are promising, non-invasive applications with potential to significantly improve, e.g. cancer therapies like viro- or immunotherapy or surgical applications. However, a crucial step towards their breakthrough is still missing: affordable and easy-to-handle quality assurance tools for therapy devices and ways to verify treatment planning algorithms. This deficiency limits the safety and comparability of treatments. METHODS: To overcome this deficiency accurate spatial and temporal temperature maps could be used...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27882240/t2-based-temperature-monitoring-in-bone-marrow-for-mr-guided-focused-ultrasound
#12
Eugene Ozhinsky, Misung Han, Matthew Bucknor, Roland Krug, Viola Rieke
BACKGROUND: Current clinical protocols for MR-guided focused ultrasound (MRgFUS) treatment of osseous lesions, including painful bone metastases and osteoid osteomas, rely on measurement of the temperature change in adjacent muscle to estimate the temperature of the bone. The goal of this study was to determine if T2-based thermometry could be used to monitor the temperature change in bone marrow during focused ultrasound ablation of bone lesions. METHODS: We investigated the dependence of T2 on temperature in ex vivo bovine yellow bone marrow at 3T and studied the influence of acquisition parameters on the T2 measurements...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27822376/the-safety-and-effectiveness-of-volumetric-magnetic-resonance-guided-high-intensity-focused-ultrasound-treatment-of-symptomatic-uterine-fibroids-early-clinical-experience-in-china
#13
Rui Chen, Bilgin Keserci, Hui Bi, Xiaobing Han, Xiaoying Wang, Wenpei Bai, Yueling Wang, Xuedong Yang, Jian Yang, Juan Wei, Minna Seppälä, Antti Viitala, Qinping Liao
BACKGROUND: Uterine fibroids are the most common benign tumor in women, and surgical intervention is still the main fibroid treatment. Patient demands have encouraged development of less-invasive methods such as high-intensity focused ultrasound (HIFU). This study aimed to evaluate the safety and effectiveness of magnetic resonance-guided high-intensity focused ultrasound therapy using a volumetric ablation technique in the treatment of symptomatic uterine fibroids in China. METHODS: One hundred and seven patients were enrolled and treated with magnetic resonance-guided high-intensity focused ultrasound in this study...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27785362/low-intensity-pulsed-ultrasound-stimulation-in-different-regions-in-the-viability-of-myocutaneous-flaps
#14
Fernanda Luiza de Almeida Albuquerque, Lais Mara Siqueira das Neves, Elaine Caldeira de Oliveira Guirro
BACKGROUND: Low-intensity pulsed ultrasound (LIPUS) has presented good results in the healing of chronic wounds. The objective of this study was to compare the effect of LIPUS on the viability of transverse rectus abdominal muscle (TRAM) flap in different regions (central and epigastric) in rats. METHODS: Twenty-one Wistar male rats were homogeneously distributed into three groups as follows: group 1 (control), animals submitted to surgery only; group 2, animals submitted to surgery and application of LIPUS at the center of the flap; and group 3, animals submitted to surgery and application of LIPUS at the flap area corresponding to the right inferior epigastric artery pedicle...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27777767/erratum-to-open-source-small-animal-magnetic-resonance-guided-focused-ultrasound-system
#15
Megan E Poorman, Vandiver L Chaplin, Ken Wilkens, Mary D Dockery, Todd D Giorgio, William A Grissom, Charles F Caskey
[This corrects the article DOI: 10.1186/s40349-016-0066-7.].
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27729978/the-influence-of-low-intensity-physiotherapeutic-ultrasound-on-the-initial-stage-of-bone-healing-in-rats-an-experimental-and-simulation-study
#16
Aldo José Fontes-Pereira, Marcio Amorim, Fernanda Catelani, Daniel Patterson Matusin, Paulo Rosa, Douglas Magno Guimarães, Marco Antônio von Krüger, Wagner Coelho de Albuquerque Pereira
BACKGROUND: Low-intensity physiotherapeutic ultrasound has been used in physical therapy clinics; however, there remain some scientific issues regarding the bone-healing process. The objective of this study was to investigate the influence of low-intensity physiotherapeutic ultrasound on the initial stage of bone healing in rats. METHODS: Twenty-two male adult rats were assessed quantitatively and qualitatively using radiographic, biochemical, and histological analyses...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27688881/mr-thermometry-for-focused-ultrasound-monitoring-utilizing-model-predictive-filtering-and-ultrasound-beam-modeling
#17
Henrik Odéen, Scott Almquist, Joshua de Bever, Douglas A Christensen, Dennis L Parker
BACKGROUND: A major challenge in using magnetic resonance temperature imaging (MRTI) to monitor focused ultrasound (FUS) applications is achieving high spatio-temporal resolution over a large field of view (FOV). This is important to accurately monitor all ultrasound (US) power depositions. Magnetic resonance (MR) subsampling in conjunction with thermal model-based reconstruction of the MRTI utilizing Pennes bioheat transfer equation (PBTE) is one promising approach. The thermal properties used in the thermal model are often estimated from a pre-treatment, low-power sonication...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27597889/open-source-small-animal-magnetic-resonance-guided-focused-ultrasound-system
#18
Megan E Poorman, Vandiver L Chaplin, Ken Wilkens, Mary D Dockery, Todd D Giorgio, William A Grissom, Charles F Caskey
BACKGROUND: MR-guided focused ultrasound or high-intensity focused ultrasound (MRgFUS/MRgHIFU) is a non-invasive therapeutic modality with many potential applications in areas such as cancer therapy, drug delivery, and blood-brain barrier opening. However, the large financial costs involved in developing preclinical MRgFUS systems represent a barrier to research groups interested in developing new techniques and applications. We aim to mitigate these challenges by detailing a validated, open-source preclinical MRgFUS system capable of delivering thermal and mechanical FUS in a quantifiable and repeatable manner under real-time MRI guidance...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27536356/influence-of-therapeutic-ultrasound-on-the-biomechanical-characteristics-of-the-skin
#19
Lígia Brancalion Catapani, Adriana da Costa Gonçalves, Nathalia Morano Candeloro, Lídia Aparecida Rossi, Elaine Caldeira de Oliveira Guirro
BACKGROUND: Skin function is dependent on its biomechanical characteristics, resistance, malleability, and elasticity. Therapeutic ultrasound may increase cutaneous malleability thus and optimize the rehabilitation process on specific diseases. The aim of this study is to evaluate possible alterations of biomechanical characteristics of the normal skin after therapeutic ultrasound application. METHODS: Thirty-one volunteers took part of the study, and the average age was 31...
2016: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/27525101/volumetric-mr-guided-high-intensity-focused-ultrasound-ablation-to-treat-uterine-fibroids-through-the-abdominal-scars-using-scar-patch-a-case-report
#20
Ying Zhu, Bilgin Keserci, Antti Viitala, Juan Wei, Xuedong Yang, Xiaoying Wang
BACKGROUND: Abdominal scars pose a challenge in magnetic resonance-guided high-intensity focused ultrasound (MR-HIFU) therapies, limiting patient selection and increasing the risk of skin burns. Especially, scars arising from longitudinal incisions are problematic as they usually lie medially at the lower abdomen where the ultrasound beam has to go through. Volumetric sonication has been shown to efficiently enlarge the ablated volume per sonication, but they nevertheless require more thermal energy to be deposited per sonication which increases the temperature in the near-field area located between the transducer and the target region...
2016: Journal of Therapeutic Ultrasound
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