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Ultrasound guidance

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https://www.readbyqxmd.com/read/29457587/power-cavitation-guided-blood-brain-barrier-opening-with-focused-ultrasound-and-microbubbles
#1
Mark T Burgess, Iason Zacharias Apostolakis, Elisa E Konofagou
Image-guided monitoring of microbubble-based focused ultrasound (FUS) therapies relies on the accurate localization of FUS-stimulated microbubble activity (i.e. acoustic cavitation). Passive cavitation imaging with ultrasound arrays can achieve this, but with insufficient spatial resolution. In this study, we address this limitation and perform high-resolution monitoring of acoustic cavitation-mediated blood-brain barrier (BBB) opening with a new technique called power cavitation imaging. By synchronizing the FUS transmit and passive receive acquisition, high-resolution passive cavitation imaging was achieved by using delay and sum (DAS) beamforming with absolute time delays...
February 19, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29456598/-it-s-learned-on-the-job-and-it-depends-who-you-re-with-an-observational-qualitative-study-of-how-internal-jugular-cannulation-is-taught-and-learned
#2
Clifford L Shelton, Maggie M Mort, Andrew F Smith
Internal jugular cannulation may lead to serious complications. Ultrasound guidance is advocated; however, procedural complications remain a concern. Inconsistent education may be in part responsible for this. This study examined how internal jugular cannulation is taught and learned. An ethnographic approach was used in two acute hospitals. Methods comprised interviews, observations and focus groups. An inductive thematic analysis was undertaken. Three themes were identified: apprenticeship , trust and reciprocity...
February 2018: Journal of the Intensive Care Society
https://www.readbyqxmd.com/read/29456577/is-ultrasound-screening-for-vasa-praevia-clinically-justified-and-a-financially-viable-screening-test-a-literature-review
#3
REVIEW
Gillian Coleman, Heather Venables
Vasa praevia is an obstetric complication currently not screened for within the United Kingdom, which if undetected prenatally can lead to fetal death when the membranes rupture. Internationally, guidelines are available providing guidance on the best screening policy and management pathways. However, the UK National Screening Committee and Royal College of Obstetricians and Gynaecologists do not support screening due to a lack of evidence. Recent studies explore the ability of ultrasound to detect vasa praevia prenatally in both the general and high-risk populations...
February 2018: Ultrasound: Journal of the British Medical Ultrasound Society
https://www.readbyqxmd.com/read/29455556/conventional-versus-computer-assisted-stereoscopic-ultrasound-needle-guidance-for-renal-access-a-randomized-crossover-bench-top-trial
#4
Alexander Blair Thomas, Jonathan M Ewald, Isaac Kelly, Matthew Pierce, Jerry Thomas, Braden Mattison, Benjamin West, David Ruckle, Mohamed Keheila, Samuel R Abourbih, Reed Krause, Vi Am Dinh, D Daniel Baldwin, D Duane Baldwin
PURPOSE: Ultrasound guidance during renal access and mass biopsy reduces radiation exposure, but can be technically challenging. A needle guidance system might simplify these procedures. The purpose of this randomized crossover trial was to compare conventional and computer-assisted ultrasound needle guidance systems for renal access and mass biopsy. MATERIALS AND METHODS: Seventy-one subjects were randomized to perform renal access or mass biopsy on a phantom using conventional and computer-assisted ultrasound guidance in a crossover study design...
February 17, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29453521/safety-and-feasibility-of-breast-lesion-localization-using-magnetic-seeds-magseed-a-multi-centre-open-label-cohort-study
#5
James R Harvey, Yit Lim, John Murphy, Miles Howe, Julie Morris, Amit Goyal, Anthony J Maxwell
PURPOSE: Wire localization has several disadvantages, notably wire migration and difficulty scheduling the procedure close to surgery. Radioactive seed localization overcomes these disadvantages, but implementation is limited due to radiation safety requirements. Magnetic seeds potentially offer the logistical benefits and transcutaneous detection equivalence of a radioactive seed, with easier implementation. This study was designed to evaluate the feasibility and safety of using magnetic seeds for breast lesion localization...
February 16, 2018: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29450905/a-tramp-derived-orthotopic-prostate-syngeneic-tops-cancer-model-for-investigating-anti-tumor-treatments
#6
Justin Lardizabal, Jun Ding, Zahid Delwar, Paul S Rennie, William Jia
BACKGROUND: Patients with advanced prostate cancer have limited curative options, therefore new treatments are needed. Mouse models play a pivotal role in the discovery and development of new treatments. In the present study, a TRAMP-derived Orthotopic Prostate Syngeneic (TOPS) mouse model was developed and found to provide a consistent means of monitoring tumor and metastatic responses to novel treatments. METHODS: The mouse TOPS model was generated using luciferase transduced TRAMP-C2 prostate cancer cells that were orthotopically injected into Bl6 mice by ultrasound guidance...
February 16, 2018: Prostate
https://www.readbyqxmd.com/read/29450615/contrast-enhanced-ultrasound-ceus-in-abdominal-intervention
#7
REVIEW
Dean Y Huang, Gibran T Yusuf, Mohammad Daneshi, Raymond Ramnarine, Annamaria Deganello, Maria E Sellars, Paul S Sidhu
The introduction of ultrasound contrast agents has rendered contrast-enhanced ultrasound (CEUS) a valuable complementary technique to address clinically significant problems. This pictorial review describes the use of CEUS guidance in abdominal intervention and illustrates such application for a range of clinical indications. Clinical application of CEUS discussed include commonly performed abdominal interventional procedures, such as biopsy, drainage, nephrostomy, biliary intervention, abdominal tumor ablation and its subsequent monitoring, and imaging of vascular complications following abdominal intervention...
February 15, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29443790/rotational-atherectomy-ablation-for-an-unexpandable-stent-under-the-guide-of-ivus-a-case-report
#8
Daoyuan Si, Guohui Liu, Yaliang Tong, Yuquan He
RATIONALE: Inadequate stent expansion due to rigid calcified may result in restenosis lesions, but the available options are limited. PATIENT CONCERNS: We report a case via the trans-radial approach of the severely underexpanded freshly deployed stent due to heavily calcified plaques DIAGNOSES:: Coronary angiography revealed that there was no adequate expansion of the freshly deployed stent. INTERVENTIONS: Under the guide of intravascular ultrasound (IVUS), rotational atherectomy (RA) successfully ablated the stent layers and the protruding calcified plaque...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29443386/technical-note-error-metrics-for-estimating-the-accuracy-of-needle-instrument-placement-during-transperineal-mr-us-guided-prostate-interventions
#9
Ester Bonmati, Yipeng Hu, Barbara Villarini, Rachael Rodell, Paul Martin, Lianghao Han, Ian Donaldson, Hashim U Ahmed, Caroline M Moore, Mark Emberton, Dean C Barratt
PURPOSE: Image-guided systems that fuse magnetic resonance imaging (MRI) with three-dimensional (3D) ultrasound (US) images for performing targeted prostate needle biopsy and minimally-invasive treatments for prostate cancer are of increasing clinical interest. To date, a wide range of different accuracy estimation procedures and error metrics have been reported, which makes comparing the performance of different systems difficult. METHODS: A set of 9 measures are presented to assess the accuracy of MRI-US image registration, needle positioning, needle guidance, and overall system error, with the aim of providing a methodology for estimating the accuracy of instrument placement using a MR/US-guided transperineal approach...
February 14, 2018: Medical Physics
https://www.readbyqxmd.com/read/29441097/the-feasibility-of-using-ultrasound-during-follow-up-for-superficial-non-melanoma-skin-cancers-after-electronic-brachytherapy
#10
Uma Goyal, Justin Suszko, Baldassarre Stea
Purpose: Non-melanoma skin cancers (NMSCs) can be treated with a number of modalities including surgery, topical chemotherapy, or radiotherapy. Amongst the radiotherapeutic options, electronic brachytherapy (eBT) is an appealing treatment as it is usually given in a few fractions, it leads to good outcomes, and is increasingly being used. However, currently no follow-up imaging is routinely used or recommended to evaluate treatment response of NMSC. We aimed to use ultrasound (US) in follow-up after eBT for superficial NMSC to assess its feasibility in detecting possible tumor response...
December 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/29439780/evolving-imaging-techniques-for-staging-axillary-lymph-nodes-in-breast-cancer
#11
REVIEW
S Lowes, A Leaver, K Cox, K Satchithananda, D Cosgrove, A Lim
The presence and extent of axillary nodal metastases at the time of breast cancer diagnosis is a critical factor in disease prognosis and plays a central role in deciding the best treatment for patients. Accurate assessment of the axilla is therefore an essential component in staging breast cancer. Over the years, axillary staging has evolved from surgical axillary lymph node dissection (ALND), with its numerous associated long-term complications, to the much less-radical surgical sentinel lymph node excision biopsy (SLNB), the current reference standard...
February 10, 2018: Clinical Radiology
https://www.readbyqxmd.com/read/29439267/radiation-exposure-during-ureterorenoscopy-and-laser-lithotripsy-an-analysis-of-stone-characteristics
#12
Marios Hadjipavlou, Vincent Lam, Jai Seth, Faqar Anjum, Seshadri Sriprasad
INTRODUCTION AND OBJECTIVES: Stone formers often have a chronic exposure to significant quantities of ionising radiation from radiological investigations and interventions. Predicting radiation exposure would allow the clinician to quantify expected cumulative radiation and find strategies to minimise exposure. We evaluated radiation exposure during ureteroscopy and laser lithotripsy (URS + LL) for a single stone episode and correlated the results to stone characteristics. METHOD: Data was collected retrospectively for all patients undergoing URS + LL in our institution over a 1 year period...
February 13, 2018: Urologia Internationalis
https://www.readbyqxmd.com/read/29435744/design-and-implementation-of-an-electromagnetic-ultrasound-based-navigation-technique-for-laparoscopic-ablation-of-liver-tumors
#13
Iwan Paolucci, Marius Schwalbe, Gian Andrea Prevost, Anja Lachenmayer, Daniel Candinas, Stefan Weber, Pascale Tinguely
BACKGROUND: Efficient laparoscopic ablation of liver tumors relies on precise tumor visualization and accurate positioning of ablation probes. This study evaluates positional accuracy and procedural efficiency of a dynamic navigation technique based on electromagnetic-tracked laparoscopic ultrasound (ELUS) for laparoscopic ablation of liver tumors. METHODS: The proposed navigation approach combines intraoperative 2D ELUS-based planning for navigated positioning of ablation probes, with immediate 3D ELUS-based validation of intrahepatic probe position...
February 12, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29435205/percutaneous-salivary-gland-ablation-using-ethanol-in-a-rat-model
#14
Emma Burch, Lacey Lubeley, James Murakami
Objectives: Sialorrhea is a common health and psychosocial problem for children with neuromuscular dysfunction secondary to a variety of disorders such as cerebral palsy. Current accepted treatments include the injection of botulinum toxin into the submandibular glands for temporary symptom relief. The purpose of this study is to demonstrate the feasibility of percutaneous ethanol injection for longer lasting salivary gland ablation in an animal model. Material and Methods: Twenty rats were used in this study...
October 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/29435083/evaluation-of-therapeutic-effects-of-125-i-particles-brachytherapy-for-recurrent-bladder-cancer
#15
Yu-Ming Zhou, Xiao Feng, Bing-Cheng Zhou, Yue-Feng Fan, Yuan-Liang Huang
The aim of the present study was to evaluate the clinical value of 125 I particles implantation in the treatment of recurrent bladder cancer. The study is a retrospective analysis of 32 patients with recurrent bladder cancer treated between May 2010 and January 2010. Of these, 16 cases (chemotherapy group) received conventional chemotherapy. A total of 16 patients ( 125 I group) received radiotherapy with 125 I particles, followed by conventional chemotherapy. By guidance of B ultrasound, 125 I radioactive particles were implanted...
March 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434132/usefulness-of-cutting-balloon-angioplasty-prior-to-stenting-with-intravascular-ultrasound-imaging-guidance-for-spontaneous-multi-vessel-coronary-dissection-including-the-left-main-coronary-artery
#16
Masahiko Noguchi, Kotaro Obunai, Yu Fukui, Hiroshi Okumura, Hiroyuki Watanabe
We report a case of percutaneous coronary intervention for spontaneous multi-vessel coronary dissection including the left main coronary artery. This case suggests that intracoronary imaging is useful for understanding the complex anatomy and for choosing the appropriate management for effective revascularization. Furthermore, cutting balloon angioplasty prior to stenting is useful for preventing the longitudinal extension of the intramural hematoma and avoiding unnecessary stent implantation.
February 9, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29429940/review-of-novel-sentinel-lymph-node-biopsy-techniques-in-breast-cancer-patients-treated-with-neoadjuvant-chemotherapy
#17
REVIEW
Yeliz Emine Ersoy, Huseyin Kadioglu
Breast cancer patients who present with nodal metastasis receive neoadjuvant chemotherapy (NAC) with increasing frequency and can have complete pathologic response after treatment. In this clinical scenario, sentinel node mapping and biopsy are gaining acceptance instead of axillary dissection to avoid morbidity. Biopsy proven positive lymph nodes must be reliably excised and examined after NAC to further decrease the false negativity rate of sentinel lymph node (SLN) surgery. The standard method for axillary staging in breast cancer patients even after NAC is SLN biopsy (SLNB) with a radioisotope, blue dye, or both (dual technique)...
January 31, 2018: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29429201/-survey-on-the-prevalence-of-continuous-blood-purification-in-chinese-pediatric-critical-care
#18
X Yang, S Y Qian, Y M Zhu, X Xu, C F Liu, F Xu, X X Ren, Y Wang, Y C Zhang, G P Lu
Objective: To investigate the current application status of continuous blood purification (CBP) technology and equipment in pediatric intensive care unit (PICU) in China. Methods: A cross-sectional survey was conducted to understand the current popularization of CBP technology and equipment, the management of CBP equipment and consumables, and the application of CBP in different diseases. A questionnaire named Application Status of Continuous Blood Purification Technology was applied. Children's hospitals and polyclinic hospitals with the pediatric qualification (pediatric emergency or critical care unit members of Chinese Medical Association and Chinese Medical Doctor Association) were selected...
February 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29422676/pro-apoptotic-liposomes-nanobubble-conjugate-synergistic-with-paclitaxel-a-platform-for-ultrasound-responsive-image-guided-drug-delivery
#19
Rajeet Chandan, Rinti Banerjee
Recently, liposomes-microbubble conjugates have emerged as a promising ultrasound (US)-responsive platform for cancer therapeutics. However, these are limited by their size in terms of tumor penetration. Additionally, there have been no attempts to enhance the smartness of such conjugates which have been used only as passive carriers. The present study explores submicron sized (756 ± 180.0 nm), US-responsive, phosphatidylserine (PS)-based paclitaxel-liposomes-nanobubble conjugates (PSPLBC) with an additional pro-apoptotic effect towards enhanced anti-cancer efficacy and image-guidance...
February 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29417268/retrospective-single-arm-cohort-study-of-patients-with-hepatocellular-adenomas-treated-with-percutaneous-thermal-ablation
#20
Oleg Mironov, Arash Jaberi, Robert Beecroft, John R Kachura
PURPOSE: To assess the safety and efficacy of percutaneous thermal ablation for the treatment of hepatocellular adenomas. MATERIALS AND METHODS: This is an ethics board-approved, single-arm, retrospective, cohort study of patients with pathologically proven hepatocellular adenomas treated with percutaneous thermal ablation at a tertiary referral center from 1999 to 2016. Demographic, procedural, and outcome data were collected and summarized with appropriate measures of central tendency and dispersion...
February 7, 2018: Cardiovascular and Interventional Radiology
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