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MRI-guided HIFU

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https://www.readbyqxmd.com/read/28256923/ultrasound-guided-high-intensity-focused-ultrasound-combined-with-gonadotropin-releasing-hormone-analogue-gnrha-ablating-uterine-leiomyoma-with-homogeneous-hyperintensity-on-t2-weighted-mr-imaging
#1
Shenghua Yang, Fanjing Kong, Ruijie Hou, Fengmin Rong, Nana Ma, Shaoping Li, Jun Yang
OBJECTIVES: The study aimed to evaluate the safety and efficiency of Ultrasound guided high-intensity focused ultrasound (USgHIFU) combined with gonadotropin releasing hormone analogue (GnRHa) ablating symptomatic uterine leiomyoma with homogeneous hyperintensity on T2-weighted MR imaging prospectively. METHODS: A total of 34 patients with 42 symptomatic uterine leiomyomas with homogeneous hyperintensity on T2-weighted MR imaging were enrolled in our study. The patient who had multiple uterine leiomyomas, only one dominant leiomyoma was treated...
March 3, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28255351/tracking-perfluorocarbon-nanoemulsion-delivery-by-19-f-mri-for-precise-high-intensity-focused-ultrasound-tumor-ablation
#2
Soo Hyun Shin, Eun-Joo Park, Changki Min, Sun Il Choi, Soyeon Jeon, Yun-Hee Kim, Daehong Kim
Perfluorocarbon nanoemulsions (PFCNEs) have recently been undergoing rigorous study to investigate their ability to improve the therapeutic efficacy of tumor ablation by high intensity focused ultrasound (HIFU). For precise control of PFCNE delivery and thermal ablation, their accumulation and distribution in a tumor should be quantitatively analyzed. Here, we used fluorine-19 ((19)F) magnetic resonance imaging (MRI) to quantitatively track PFCNE accumulation in a tumor, and analyzed how intra-tumoral PFCNE quantities affect the therapeutic efficacy of HIFU treatment...
2017: Theranostics
https://www.readbyqxmd.com/read/28210800/preservation-of-the-endometrial-enhancement-after-magnetic-resonance-imaging-guided-high-intensity-focused-ultrasound-ablation-of-submucosal-uterine-fibroids
#3
Young-Sun Kim, Tae-Joong Kim, Hyo Keun Lim, Hyunchul Rhim, Sin-Ho Jung, Joong Hyun Ahn, Jeong-Won Lee, Byoung-Gie Kim
OBJECTIVE: To evaluate the integrity of endometrial enhancement after magnetic resonance imaging-guided high-intensity focused ultrasound (MR-HIFU) ablation of submucosal uterine fibroids based on contrast-enhanced MRI findings, and to identify the risk factors for endometrial impairment. METHODS: In total, 117 submucosal fibroids (diameter: 5.9 ± 3.0 cm) in 101 women (age: 43.6 ± 4.4 years) treated with MR-HIFU ablation were retrospectively analysed...
February 16, 2017: European Radiology
https://www.readbyqxmd.com/read/28119893/expulsion-of-fibroids-to-the-endometrial-cavity-after-magnetic-resonance-imaging-guided-high-intensity-focused-ultrasound-surgery-mrgfus-treatment-of-intramural-uterine-fibroids
#4
Jae-Hyeok Jeong, Gil Pyo Hong, Yu-Ri Kim, Da Gyo Hong, Jae-Eun Ha, Jung In Yeom, Eun-Jeong Kim, Hyung-Il Kim, Kyu-Sup Lee
OBJECTIVES: This report seeks to introduce some cases of the patients who received magnetic resonance imaging (MRI)-guided high intensity focused ultrasound (HIFU) surgery (MRgFUS)-based intramural uterine fibroids treatment where the post-MRgFUS intramural uterine fibroids decreased in its volume and protruded towards the endometrial cavity to be expelled by hysteroscopy. METHODS: Of the 157 patients who had received MRgFUS treatment in the Obstetrics and Gynecology of the Hospital from March, 2015 to February, 2016; this study examined 6 of the cases where, after high intensity focused ultrasound treatment, intramural uterine fibroids protruded towards the endometrial cavity to be removed by hysteroscopic myomectomy...
December 2016: Journal of Menopausal Medicine
https://www.readbyqxmd.com/read/28109895/pilot-study-of-the-mirabilis-system-prototype-for-rapid-noninvasive-uterine-fibroid-treatment-using-an-ultrasound-guided-volumetric-shell-ablation-technique
#5
Jessica E Parsons, Michael P H Lau, Patrick J Martin, Joel J Islas Lagos, Juan M Aguilar Aguirre, José G Garza Leal
STUDY OBJECTIVE: The primary objective of this pilot study was to evaluate the safety and acute tissue ablation efficacy of a transabdominal high-intensity focused ultrasound (HIFU) prototype device that uses ultrasound imaging guidance for rapid noninvasive ablation of uterine fibroids. The secondary objective was to assess preliminary fibroid-related symptom improvement and fibroid volume reduction at 3 - 6 months post-treatment in subsets of patients. DESIGN: Multi-center prospective single-arm pilot study (Canadian Task Force Classification II-2) SETTING: University-affiliated teaching hospital and private community hospital PATIENTS: Women with a diagnosis of symptomatic uterine fibroids planning to undergo hysterectomy INTERVENTIONS: Seventy-three (73) women underwent transabdominal ultrasound-guided HIFU treatment using a volumetric ablation technique referred to as 'shell ablation,' in which the HIFU energy is deposited in patterns that partially encapsulate the peripheral region of the targeted fibroid(s)...
January 18, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28069193/safety-of-ultrasound-guided-high-intensity-focused-ultrasound-ablation-for-diffuse-adenomyosis-a-retrospective-cohort-study
#6
Yujie Feng, Liang Hu, Wenzhi Chen, Rong Zhang, Xi Wang, Jinyun Chen
OBJECTIVES: To evaluate the safety of ultrasound-guided high-intensity focused ultrasound (HIFU) ablation for patients with diffuse adenomyosis. METHODS: This was a retrospective cohort study. The data was collected from 417 symptomatic adenomyosis patients who underwent ultrasound-guided HIFU between January 2012 and December 2015 at 1st Affiliated Hospital of Chongqing Medical University, Chongqing, China. Among them were 260 patients with diffuse adenomyosis (Group D) and 157 patients with focal adenomyosis (Group F)...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28067975/assessment-of-acute-thermal-damage-volumes-in-muscle-using-magnetization-prepared-3d-t2-weighted-imaging-following-mri-guided-high-intensity-focused-ultrasound-therapy
#7
Robert M Staruch, Joris Nofiele, Jamie Walker, Chenchen Bing, Ananth J Madhuranthakam, April Bailey, Young-Sun Kim, Avneesh Chhabra, Dennis Burns, Rajiv Chopra
PURPOSE: To evaluate magnetization-prepared 3D T2 -weighted magnetic resonance imaging (MRI) measurements of acute tissue changes produced during ablative MR high-intensity focused ultrasound (MR-HIFU) exposures. MATERIALS AND METHODS: A clinical MR-HIFU system (3T) was used to generate thermal lesions (n = 24) in the skeletal muscles of three pigs. T1 -weighted, 2D T2 -weighted, and magnetization-prepared 3D T2 -weighted sequences were acquired before and after therapy to evaluate tissue changes following ablation...
January 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27799004/comparing-high-intensity-focal-ultrasound-hemiablation-to-robotic-radical-prostatectomy-in-the-management-of-unilateral-prostate-cancer-a-matched-pair-analysis
#8
Simone Albisinni, Fouad Aoun, Simon Bellucci, Ibrahim Biaou, Ksenija Limani, Eric Hawaux, Alexandre Peltier, Roland van Velthoven
INTRODUCTION: Although still experimental, focal treatment is being increasingly implemented in the management of prostate cancer (PCa). Aim of the current study was to compare functional and oncologic outcomes of high-intensity focal ultrasound (HIFU) hemiablation of the prostate to robot-assisted laparoscopic prostatectomy (RALP) in the management of unilateral PCa. MATERIALS: Fifty-five men with unilateral, clinically localized PCa underwent HIFU hemiablation of the affected prostatic lobe between 2007 and 2015...
January 2017: Journal of Endourology
https://www.readbyqxmd.com/read/27774787/template-free-synthesis-of-hollow-porous-organosilica-fe3o4-hybrid-nanocapsules-toward-magnetic-resonance-imaging-guided-high-intensity-focused-ultrasound-therapy
#9
Ming Ma, Fei Yan, Minghua Yao, Zijun Wei, Dongliang Zhou, Heliang Yao, Hairong Zheng, Hangrong Chen, Jianlin Shi
Entirely differing from the common templating-based multistep strategy for fabricating multifunctional hollow mesoporous silica nanoparticles (HMSN), a facile and template-free synthetic strategy has been established to construct a unique hollow/mesoporous organosilica nanocapsule (OSNC) concurrently encapsulating both isopentyl acetate (PeA) liquid and superparamagnetic iron oxides inside (denoted as PeA@OSNC). This novel material exhibits ultrasmall and uniform particle size (∼82 nm), high surface area (∼534 m(2)·g(-1)), and excellent colloidal stability in aqueous solution...
November 9, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27686583/high-intensity-focused-ultrasound-hyperthermia-for-enhanced-macromolecular-delivery
#10
Nick Frazier, Allison Payne, Joshua de Bever, Christopher Dillon, Apoorva Panda, Nithya Subrahmanyam, Hamidreza Ghandehari
Mild hyperthermia has been used in combination with polymer therapeutics to further increase delivery to solid tumors and enhance efficacy. An attractive method for generating heat is through non-invasive high intensity focused ultrasound (HIFU). HIFU is often used for ablative therapies and must be adapted to produce uniform mild hyperthermia in a solid tumor. In this work a magnetic resonance imaging guided HIFU (MRgHIFU) controlled feedback system was developed to produce a spatially uniform 43°C heating pattern in a subcutaneous mouse tumor...
November 10, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
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