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High intensity focused ultrasound

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https://www.readbyqxmd.com/read/29350596/enhancement-of-antitumor-activity-by-using-5-ala-mediated-sonodynamic-therapy-to-induce-apoptosis-in-malignant-gliomas-significance-of-high-intensity-focused-ultrasound-on-5-ala-sdt-in-a-mouse-glioma-model
#1
Satoshi Suehiro, Takanori Ohnishi, Daisuke Yamashita, Shohei Kohno, Akihiro Inoue, Masahiro Nishikawa, Shiro Ohue, Junya Tanaka, Takeharu Kunieda
OBJECTIVE High invasiveness of malignant gliomas frequently causes early local recurrence of the tumor, resulting in extremely poor outcome. To control such recurrence, novel therapies targeted toward infiltrating glioma cells around the tumor border are required. Here, the authors investigated the antitumor activity of sonodynamic therapy (SDT) combined with a sonosensitizer, 5-aminolevulinic acid (5-ALA), on malignant gliomas to explore the possibility for clinical use of 5-ALA-mediated SDT (5-ALA-SDT). METHODS In vitro cytotoxicity of 5-ALA-SDT was evaluated in U87 and U251 glioma cells and in U251Oct-3/4 glioma stemlike cells...
January 19, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29335882/clinical-response-to-vim-s-thalamic-stereotactic-radiosurgery-for-essential-tremor-is-associated-with-distinctive-functional-connectivity-patterns
#2
Constantin Tuleasca, Elena Najdenovska, Jean Régis, Tatiana Witjas, Nadine Girard, Jérôme Champoudry, Mohamed Faouzi, Jean-Philippe Thiran, Meritxell Bach Cuadra, Marc Levivier, Dimitri Van De Ville
INTRODUCTION: Essential tremor (ET) is the most common movement disorder. Drug-resistant ET can benefit from standard surgical stereotactic procedures (deep brain stimulation, thalamotomy) or minimally invasive high-intensity focused ultrasound (HIFU) or stereotactic radiosurgical thalamotomy (SRS-T). Resting-state fMRI (rs-fMRI) is a non-invasive imaging method acquired in absence of a task. We examined whether rs-fMRI correlates with tremor score on the treated hand (TSTH) improvement 1 year after SRS-T...
January 15, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29332489/thermoacoustic-lensing-in-ultrasound-imaging-of-nonechogenic-tissue-during-high-intensity-focused-ultrasound-exposure
#3
Matthew Jahns, Dan MacDougall, Robert B A Adamson
We develop a ray-tracing theory to describe the effects of thermoacoustic lensing during high-intensity focused ultrasound (HIFU) on ultrasound images of reflectors lying distal to the HIFU focal region and discuss the application of thermal lensing effects to dose monitoring in HIFU therapy. By analyzing the effects of thermal and geometric delays of acoustic rays passing through a region of tissue undergoing localized heating, we show how the shape of a reflector distal to the heated region can be predicted and present experimental measurements in good agreement with the model...
January 1, 2018: Ultrasonic Imaging
https://www.readbyqxmd.com/read/29332078/magnetic-resonance-guided-high-intensity-focused-ultrasound-for-treating-movement-disorders
#4
Young Goo Kim, Eun Jung Kweon, Won Seok Chang, Hyun Ho Jung, Jin Woo Chang
Transcranial magnetic resonance-guided focused ultrasound (MRgFUS) surgery has recently gained favor as a novel, noninvasive alternative to conventional neurosurgery. In contrast to traditional ablative interventions, transcranial MRgFUS surgery is entirely imaging-guided and uses continuous temperature measurements at the target and surrounding tissue taken in real-time. Unlike Gamma Knife radiosurgery, MRgFUS surgery can make a lesion immediately and does not use ionizing radiation. Moreover, since no metallic device is implanted, MR imaging-based diagnosis is not restricted throughout life...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29330630/evaluation-of-pain-during-high-intensity-focused-ultrasound-ablation-of-benign-thyroid-nodules
#5
Brian H H Lang, Yu-Cho Woo, Keith Wan-Hang Chiu
OBJECTIVE: To assess severity and factors of pain during high-intensity focused ultrasound (HIFU) ablation of benign thyroid nodules. METHODS: 128 patients who underwent a HIFU ablation for a benign thyroid nodule were analysed. All patients received a bolus of intravenous pethidine and diazepam before treatment. After treatment, patients were asked to rate their overall pain experience on a visual analogue scale (0-100) (0 = no pain; 100 = worse possible pain) during treatment, 2 h after treatment and the following morning...
January 12, 2018: European Radiology
https://www.readbyqxmd.com/read/29327096/-focused-ultrasound-ablation-as-tremor-treatment
#6
REVIEW
Sebastian R Schreglmann, Stefan Hägele-Link, Beat Werner, Ernst Martin, Georg Kägi
BACKGROUND: The development of high-intensity magnetic resonance imaging (MRI)-guided focused ultrasound (MRIgFUS) ablation has widened the spectrum of interventional techniques for stereotactic functional neurosurgery of lesions. This has resulted in novel incisionless intervention approaches for the therapy of tremor disorders. The safety and efficacy is documented by recent study data. OBJECTIVES: This article encompasses a description of the technological basis and typical course of MRIgFUS interventions, a comparison to alternative open or incisionless surgical techniques as well as a review of the current evidence base for MRIgFUS ablation in the context of lesional interventions to treat tremor...
January 11, 2018: Der Nervenarzt
https://www.readbyqxmd.com/read/29317145/evaluation-of-quality-of-life-outcomes-following-palliative-treatment-of-bone-metastases-with-magnetic-resonance-guided-high-intensity-focused-ultrasound-an-international-multicentre-study
#7
D Harding, S L Giles, M R D Brown, G R Ter Haar, M van den Bosch, L W Bartels, Y-S Kim, M Deppe, N M deSouza
AIMS: To determine quality of life (QoL) outcomes after palliation of pain from bone metastases using magnetic resonance-guided high intensity focused ultrasound (MR-guided HIFU), measured using the European Organization for Research and Treatment of Cancer (EORTC) QLQ-C15-PAL and the QLQ-BM22 questionnaires. MATERIALS AND METHODS: Twenty patients undergoing MR-guided HIFU in an international multicentre trial self-completed the QLQ-C15-PAL and QLQ-BM22 questionnaires before and on days 7, 14, 30, 60 and 90 post-treatment...
January 6, 2018: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/29313120/significance-of-hyperechoic-marks-observed-during-high-intensity-focused-ultrasound-hifu-ablation-of-benign-thyroid-nodules
#8
Brian H H Lang, Yu-Cho Woo, Keith Wan-Hang Chiu
OBJECTIVE: To examine the association between the appearance of hyperechoic marks (HEMs) during high-intensity focused ultrasound (HIFU) ablation of benign thyroid nodules and nodule shrinkage at 6 months. METHODS: One hundred and thirty-six patients who underwent HIFU for benign thyroid nodule were analysed. An independent person carefully examined the B-mode ultrasonography screen for the appearance of HEMs after each pulse. The proportion of HEMs (%) was calculated by: [(Number of pulses that resulted in HEMs) / (Total number of pulses given per treatment) × 100] while the nodule shrinkage was measured by volume reduction ratio (VRR) = [Baseline volume-volume at 6 months]/[Baseline volume] * 100...
January 8, 2018: European Radiology
https://www.readbyqxmd.com/read/29310371/treatment-of-cornual-pregnancy-in-a-patient-with-adenomyosis-by-high-intensity-focused-ultrasound-hifu-ablation-a-case-report
#9
Lixia Yu, Linying Xu, Xiaoyan Xu
RATIONALE: Cornual ectopic pregnancy in adenomyosis patients is a rare clinical condition, which may require careful approach for accurate diagnosis and treatment. PATIENT CONCERNS: A 38-year-old woman presented with amenorrhea for 8 weeks and serum HCG levels of 1455 mmol/L. The B ultrasound showed an endometrial thickness of 1.7 cm, and the presence of a cystic structure (16 6 mm) at the right uterine horn. Color Doppler flow imaging (CDFI) accurately detected and confirmed the position of the cystic structure with its clear boundaries...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29301450/effects-of-a-microbubble-ultrasound-contrast-agent-on-high-intensity-focused-ultrasound-for-uterine-fibroids-a-randomised-controlled-trial
#10
Yan Chen, Jing Jiang, Yuhua Zeng, Xiaobing Tian, Miao Zhang, Hong Wu, Honggui Zhou
OBJECTIVE: To investigate the effects of a microbubble ultrasound contrast agent on high-intensity focused ultrasound (HIFU) treatment of uterine fibroids. METHODS: A total of 120 patients with solitary uterine fibroid were randomly assigned into Groups A, B, C and D. Patients in Groups A and B received 1.5 ml of SonoVue, Groups C and D received 1.5 ml of saline before HIFU ablation. HIFU sonication started at 6 min after administration of SonoVue or saline in Groups A and C, whereas it started at 10 min in Groups B and D...
January 4, 2018: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/29288276/hifu-a-noninvasive-and-effective-treatment-for-chyluria-15%C3%A2-years-of-experience
#11
Juhua Xiao, Ting Sun, Shouhua Zhang, Ming Ma, Xiaorong Yang, Jinshui Zhou, Jianfang Zhu, Fang Wang
BACKGROUND: The current treatment therapies for chyluria are often invasive and recurrent. Here, we investigated a novel noninvasive treatment of chyluria with high-intensity focused ultrasound (HIFU) and evaluated its clinical efficacy. METHODS: 155 patients with chyluria were treated with HIFU ablation and followed up over a period of 15 years from May 2000 to December 2015. Routine examinations including urine color observation, color Doppler ultrasound examination, blood serum test of Cr, BUN, and albumin, and detection of urinary chyle were performed before and after the treatment, 1 week, 1 and 6 months post-treatment, and followed up via telephone and other forms...
December 29, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29286434/mri-guided-focused-ultrasound-thalamotomy-for-patients-with-medically-refractory-essential-tremor
#12
Ying Meng, Yuexi Huang, Benjamin Solomon, Kullervo Hynynen, Nadia Scantlebury, Michael L Schwartz, Nir Lipsman
Essential tremor (ET) is the most common type of tremor in adults. While ET does not result in decreased life expectancy, the disabilities associated with ET can have a significant impact on quality of life, mood, functional activities, and socialization. Patients suffering from ET not sufficiently treated with first line medications may be eligible for alternative strategies such as deep brain stimulation, radiofrequency ablation, and MRI guided focused ultrasound (MRgFUS). High-intensity MRgFUS is an emerging modality to treat ET, its attraction for patients being that it is noninvasive and associated with short recovery time, as patients are home the day after treatment...
December 13, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29278943/a-retrospective-study-of-ultrasound-guided-high-intensity-focussed-ultrasound-ablation-for-multiple-uterine-fibroids-in-south-africa
#13
Min He, Hayley Jacobson, Cai Zhang, Raymond Setzen, Lian Zhang
OBJECTIVE: To evaluate the shrinkage rate, symptom relief and improvement of the quality of life following ultrasound-guided high intensity focussed ultrasound (USgHIFU) for multiple uterine fibroids. METHODS: From October 2015 to November 2016, 81 black women with multiple symptomatic fibroids underwent USgHIFU. The number of the fibroids ranged from 3 to 9. The shrinkage rate of fibroids, symptom severity score and quality of life were evaluated following USgHIFU...
January 5, 2018: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/29277585/a-comparison-of-time-taken-to-return-to-baseline-erectile-function-following-focal-and-whole-gland-ablative-therapies-for-localized-prostate-cancer-a-systematic-review
#14
REVIEW
Nicholas A Faure Walker, Joseph M Norris, Taimur T Shah, Tet Yap, Paul Cathcart, Caroline M Moore, Hashim U Ahmed, Mark Emberton, Suks Minhas
OBJECTIVES: To systematically review erectile function (EF) outcomes following primary whole gland (WG) and focal ablative therapies for localized prostate cancer to ascertain whether the treatment modality or intended treatment volume affects the time taken to recover baseline EF. METHOD AND MATERIALS: A systematic review was performed according to the preferred reporting items for systematic review and meta-analysis statement. Inclusion criteria were men with localized prostate cancer treated with primary, ablative therapy...
December 22, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/29237455/molecular-and-histological-effects-of-mr-guided-pulsed-focused-ultrasound-to-the-rat-heart
#15
Kee W Jang, Tsang-Wei Tu, Matthew E Nagle, Bobbi K Lewis, Scott R Burks, Joseph A Frank
BACKGROUND: Image-guided high intensity focused ultrasound has been used as an extracorporeal cardiac pacing tool and to enhance homing of stem cells to targeted tissues. However, molecular changes in the myocardium after sonication have not been widely investigated. Magnetic-resonance (MR)-guided pulsed focused ultrasound (pFUS) was targeted to the rat myocardium over a range of pressures and the microenvironmental and histological effects were evaluated over time. METHODS: Eight-to-ten-week-old Sprague-Dawley rats received T2-weighted MR images to target pFUS to the left ventricular and septum without cardiac or respiratory gating...
December 13, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29235453/potential-impact-of-thermal-effects-during-ultrasonic-neurostimulation-retrospective-numerical-estimation-of-temperature-elevation-in-seven-rodent-setups
#16
Charlotte Constans, Philippe Mateo, Mickael Tanter, Jean-Francois Aubry
In the past decade, a handful but growing number of groups have reported worldwide successful low intensity focused ultrasound induced neurostimulation trials on rodents with effects ranging from movement elicitations to reduction of anesthesia time or reduction of the duration of drug induced seizures. The mechanisms underlying ultrasonic neuromodulation are still not fully understood. Given the low intensities used in most of the studies, a mechanical effect is more likely to be responsible for the neuromodulation effect, but a clear description of the thermal and mechanical effects is necessary to optimize clinical applications...
December 13, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29223469/oncological-and-functional-outcomes-of-elderly-men-treated-with-hifu-vs-minimally-invasive-radical-prostatectomy-a-propensity-score-analysis
#17
Paolo Capogrosso, Eric Barret, Rafael Sanchez-Salas, Igor Nunes-Silva, François Rozet, Marc Galiano, Eugenio Ventimiglia, Alberto Briganti, Andrea Salonia, Francesco Montorsi, Xavier Cathelineau
AIM: To assess outcomes of whole gland high-intensity focused ultrasound (HIFU) as compared with minimally-invasive radical prostatectomy (MIRP) in elderly patients. MATERIALS & METHODS: Patients aged ≥70 years with, cT1-cT2 disease, biopsy Gleason score (GS) 3 + 3 or 3 + 4 and preoperative PSA ≤10 ng/mL were submitted to either whole-gland HIFU or MIRP. Propensity-score matching analysis was performed to ensure the baseline equivalence of groups. Follow-up visits were routinely performed assessing PSA and urinary function according to the International Continence Score (ICS) and the International Prostatic Symptoms Score (IPSS) questionnaires...
December 1, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29215838/-effekt-of-blood-flow-shutdown-on-the-vein-damage-when-exposed-to-hifu
#18
N N Petrishchev, D U Semenov, A U Tsibin, G U Yukina, A E Berkovich, A A Bursian, A B Belyankin, K U Senchik
The purpose. In the study we investigated the impact of the partial blood flow shutdown on structural changes in the rabbit vena cava posterior wall after exposure to high-intensity focused ultrasound (HIFU). Methods. Ultrasound Exposure: frequency of 1.65 MHz, the ultrasound intensity in the focus of 13.6 kW/cm2, the area of the focal spot 1 mm2, continuous ultrasound, exposure for 3 seconds. Results. Immediately after HIFU exposure all layers of the vein wall showed characteristic signs of thermal damage...
April 2017: Patologicheskaia Fiziologiia i èksperimental'naia Terapiia
https://www.readbyqxmd.com/read/29211405/high-intensity-focused-ultrasound-hifu-as-salvage-therapy-for-radio-recurrent-prostate-cancer-predictors-of-disease-response
#19
Shawn Dason, Nathan C Wong, Christopher B Allard, Jen Hoogenes, William Orovan, Bobby Shayegan
BACKGROUND: Some men with localized radio-recurrent prostate cancer may benefit from salvage high-intensity focused ultrasound (HIFU). Herein, we describe oncologic outcomes and predictors of disease response after salvage whole gland HIFU from our prospective cohort. MATERIALS AND METHODS: Patients with localized radio-recurrent prostate cancer were prospectively enrolled from January 2005 to December 2014. Participants had to meet both biochemical and histological definitions of recurrence...
December 7, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/29207852/the-efficacy-and-safety-of-high-intensity-focused-ultrasound-ablation-of-benign-thyroid-nodules
#20
Brian H Lang, Arnold L H Wu
High-intensity focused ultrasound (HIFU) is a promising form of thermal ablation of benign thyroid nodules, but evidence supporting its use is scarce. The present review evaluated the efficacy and safety of single-session HIFU treatment of benign thyroid nodules. As reported in the literature, the extent of nodule shrinkage following treatment ranged from 48.8% to 68.8%. Like other forms of ablation, the shrinkage rate was greatest in the first 3-6 months, and the best responders were patients with small (≤10 mL) nodules...
October 10, 2017: Ultrasonography
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