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https://www.readbyqxmd.com/read/28335194/automatic-echographic-detection-of-halloysite-clay-nanotubes-in-a-low-concentration-range
#1
Francesco Conversano, Paola Pisani, Ernesto Casciaro, Marco Di Paola, Stefano Leporatti, Roberto Franchini, Alessandra Quarta, Giuseppe Gigli, Sergio Casciaro
Aim of this work was to investigate the automatic echographic detection of an experimental drug delivery agent, halloysite clay nanotubes (HNTs), by employing an innovative method based on advanced spectral analysis of the corresponding "raw" radiofrequency backscatter signals. Different HNT concentrations in a low range (5.5-66 × 10(10) part/mL, equivalent to 0.25-3.00 mg/mL) were dispersed in custom-designed tissue-mimicking phantoms and imaged through a clinically-available echographic device at a conventional ultrasound diagnostic frequency (10 MHz)...
April 11, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334430/radiofrequency-ablation-using-a-10-mm-target-margin-for-small-hepatocellular-carcinoma-in-patients-with-liver-cirrhosis-a-prospective-randomized-trial
#2
Mingheng Liao, Xiaofei Zhong, Jingyi Zhang, Yangyang Liu, Zexin Zhu, Hong Wu, Yong Zeng, Jiwei Huang
BACKGROUND AND OBJECTIVES: To compare 3-year clinical outcomes of radiofrequency ablation (RFA) targeting 5- or 10-mm margins for small hepatocellular carcinomas (HCCs) in cirrhotic patients. METHODS: In total, 96 cirrhotic patients with a small solitary HCC (diameter ≤3 cm) were included in this prospective trial (ChiCTRTRC-10000954). Patients were stratified by Child-Pugh class and randomly allocated into groups targeting either wide margins (≥10 mm, WM) or narrow margins (≥5 mm but <10 mm, NM)...
March 23, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28333405/use-of-nanofractional-radiofrequency-for-the-treatment-of-acne-scars-in-indian-skin
#3
Apratim Goel, Vallari Gatne
BACKGROUND: Pitted acne scars of all types remain notoriously challenging to treat with no satisfactory treatment modality, particularly true for darker Fitzpatrick skin types such as Indian skin. AIM: Nanofractional radiofrequency has been shown to be an effective treatment modality for the cosmetic improvement of acne scars. METHODS: Twenty healthy male and female Indian patients aged 16-60 years with Fitzpatrick skin types IV-V and moderate-to-severe acne scar lesions received 1-3 treatments with a nanofractional radiofrequency device (Venus Viva) at baseline and at 3- to 6 week intervals and were evaluated with photographs at each treatment visit and up to 6 months after the final treatment session...
March 23, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28332904/comparison-of-the-long-term-efficacy-of-radiofrequency-ablation-and-surgical-turbinoplasty-in-inferior-turbinate-hypertrophy-a-randomized-clinical-study
#4
Satvinder Singh Bakshi, Kiruba Shankar Manoharan, Surianarayanan Gopalakrishnan
OBJECTIVE: To compare the long term effectiveness of radiofrequency thermal ablation with that of surgical turbinoplasty, a prospective, randomized, blinded clinical study was conducted. METHODS: Eighty six patients suffering from nasal obstruction due to bilateral inferior turbinate hypertrophy were enrolled. Forty four patients were operated by radiofrequency ablation, while 42 underwent surgical turbinoplasty. The outcomes of both techniques were compared in terms of symptoms using visual analogue score (VAS) and endoscopic scores...
March 23, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28332158/first-clinical-use-of-the-echotrack-guidance-approach-for-radiofrequency-ablation-of-thyroid-gland-nodules
#5
Alfred Michael Franz, Alexander Seitel, Nasrin Bopp, Christian Erbelding, Dominique Cheray, Stefan Delorme, Frank Grünwald, Hüdayi Korkusuz, Lena Maier-Hein
PURPOSE: Percutaneous radiofrequency ablation (RFA) of thyroid nodules is an alternative to surgical resection that offers the benefits of minimal scars for the patient, lower complication rates, and shorter treatment times. Ultrasound (US) is the preferred modality for guiding these procedures. The needle is usually kept within the US scanning plane to ensure needle visibility. However, this restricts flexibility in both transducer and needle movement and renders the procedure difficult, especially for inexperienced users...
March 22, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28331139/arthroscopic-removal-and-tendon-repair-for-refractory-rotator-cuff-calcific-tendinitis-of-the-shoulder
#6
Hiroshi Hashiguchi, Satoshi Iwashita, Atsushi Okubo, Shinro Takai
BACKGROUND: The purpose of this study was to evaluate clinical and radiological outcomes of arthroscopic treatment for refractory rotator cuff calcific tendinitis of the shoulder. METHODS: Subjects were 37 patients (35 women and 2 men; mean age, 47.8 years; age range 34-61 years) who had undergone arthroscopic treatment for calcific tendinitis of the shoulder. Despite sufficient nonsurgical treatments, all patients had residual calcific deposit with persistent or recurrent pain...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28330349/coherent-manipulation-of-non-thermal-spin-order-in-optical-nuclear-polarization-experiments
#7
Gerd Buntkowsky, Konstantin L Ivanov, Herbert Zimmermann, Hans-Martin Vieth
Time resolved measurements of Optical Nuclear Polarization (ONP) have been performed on hyperpolarized triplet states in molecular crystals created by light excitation. Transfer of the initial electron polarization to nuclear spins has been studied in the presence of radiofrequency excitation; the experiments have been performed with different pulse sequences using different doped molecular systems. The experimental results clearly demonstrate the dominant role of coherent mechanisms of spin order transfer, which manifest themselves in well pronounced oscillations...
March 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28328025/calibration-procedure-for-secular-frequency-scanning-in-ion-trap-mass-spectrometers
#8
Dalton T Snyder, Christopher J Pulliam, R Graham Cooks
RATIONALE: Mass spectra can be recorded using ion traps by scanning the frequency of an alternating current (ac) signal that corresponds to the secular frequency of a trapped ion. There is a considerable simplification in the instrumentation needed to perform such a scan compared with conventional scans of the radiofrequency (rf) amplitude. However, mass calibration is difficult. An algorithm that can be used to achieve mass calibration is investigated and the factors that affect ion mass assignments are discussed...
May 30, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28327524/reducing-risk-of-salmonellosis-through-egg-decontamination-processes
#9
REVIEW
Thilini Piushani Keerthirathne, Kirstin Ross, Howard Fallowfield, Harriet Whiley
Eggs have a high nutritional value and are an important ingredient in many food products. Worldwide foodborne illnesses, such as salmonellosis linked to the consumption of eggs and raw egg products, are a major public health concern. This review focuses on previous studies that have investigated the procedures for the production of microbiologically safe eggs. Studies exploring pasteurization and decontamination methods were investigated. Gamma irradiation, freeze drying, hot air, hot water, infra-red, atmospheric steam, microwave heating and radiofrequency heating are all different decontamination methods currently considered for the production of microbiologically safe eggs...
March 22, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28326823/tp-e-interval-and-tp-e-qt-ratio-before-and-after-catheter-ablation-in-patients-with-premature-ventricular-complexes
#10
Çağrı Yayla, Fırat Özcan, Dursun Aras, Osman Turak, Özcan Özeke, Serkan Çay, Serkan Topaloğlu
AIM: Tp-e/QT ratio is a novel marker of ventricular repolarization. The aim of the study is to evaluate the Tp-e interval and Tp-e/QT ratio before and after radiofrequency ablation (RFA) for patients with frequent premature ventricular complexes (PVCs). PATIENTS & METHODS: The study included 151 consecutive patients who underwent RFA for treatment of symptomatic frequent PVCs. RESULTS: Tp-e interval, Tp-e/QT ratio and Tp-e/QTc ratio (all p < 0...
March 14, 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/28326799/glomerular-loss-after-renal-radiofrequency-ablation-are-comparable-to-30-minutes-of-warm-ischemia
#11
Leonardo A S Abreu, José A Damasceno-Ferreira, Waldemar S Costa, Marco Aurélio Pereira-Sampaio, Francisco José Sampaio, Diogo B de Souza
PURPOSE: To compare, with stereological methods, the glomerular loss in kidneys submitted to radiofrequency ablation (RFA) or warm ischemia. METHODS: Twenty-six male pigs were divided into three groups. Eight animals were allocated in the sham group, which was submitted to laparoscopic dissection of the left renal hilum, without renal ischemia. Eight animals were allocated in the ischemia group, which had the left renal hilum clamped for 30 minutes under laparoscopic access...
March 22, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28325920/serum-wisteria-floribunda-agglutinin-positive-sialylated-mucin-1-as-a-marker-of-progenitor-biliary-features-in-hepatocellular-carcinoma
#12
Nobuharu Tamaki, Atsushi Kuno, Atsushi Matsuda, Hanako Tsujikawa, Ken Yamazaki, Yutaka Yasui, Kaoru Tsuchiya, Hiroyuki Nakanishi, Jun Itakura, Masaaki Korenaga, Masashi Mizokami, Masayuki Kurosaki, Michiie Sakamoto, Hisashi Narimatsu, Namiki Izumi
Histological molecular classification of hepatocellular carcinoma (HCC) is clinically important for predicting the prognosis. However, a reliable serum marker has not been established. The aim of this study was to evaluate the diagnostic value of serum Wisteria Floribunda agglutinin-positive sialylated mucin 1 (WFA-sialylated MUC1), which is a novel biliary marker, as a marker of HCC with hepatic progenitor cell (HPC)/biliary features and of prognosis. A total of 144 consecutive patients who underwent complete radiofrequency ablation of primary HCC were enrolled...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28325634/emerging-roles-of-coblation-in-rhinology-and-skull-base-surgery
#13
REVIEW
Garret W Choby, Peter H Hwang
Coblation is a technology that incorporates bipolar radiofrequency energy to ablate tissue at relatively low temperatures. Its use for sinonasal surgery is actively being investigated, including applications for turbinate reduction, sinus surgery, skull base surgery, and adenoidectomy. Potential benefits include reduction in blood loss, improved endoscopic surgical visualization, and reduction in postoperative pain. The main drawbacks are its relatively high cost, potential adverse effects on functional epithelium, and relative paucity of long-term outcomes...
March 18, 2017: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/28325622/the-effect-of-different-nasal-irrigation-solutions-following-septoplasty-and-concha-radiofrequency-a-prospective-randomized-study
#14
Hanifi Kurtaran, K Serife Ugur, Ceyda Sel Yilmaz, Mesut Kaya, Alper Yuksel, Nebil Ark, Mehmet Gunduz
INTRODUCTION: Nasal irrigation solutions are widely used following endonasal surgery. These irrigation solutions remove infective debris and crusts, reducing the probability of synechia formation, and accelerate mucosal healing. OBJECTIVE: The aim of the present study was to compare the effects of nasal irrigation solutions with different contents following septoplasty and concha radiofrequency. METHODS: The present study was a prospective, randomized, controlled simple blind study of 120 patients who underwent septoplasty and bilateral concha radiofrequency...
February 22, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28324965/high-dielectric-material-in-mri-numerical-assessment-of-the-reduction-of-the-induced-local-power-on-implanted-cardiac-leads
#15
Eugenio Mattei, Elena Lucano, Federica Censi, Leonardo M Angelone, Giovanni Calcagnini
High dielectric materials (HDM) have been proposed in magnetic resonance imaging (MRI) to increase the signal-to-noise ratio (SNR) of the images acquired while reducing the radiofrequency (RF) absorption in tissue. The aim of this study is to assess the potential merit of using HDM to reduce power induced at the tip of an endocardial lead in patients undergoing MRI. Numerical simulations were performed using a commercial finite-differences time-domain (FDTD) software to model the RF field generated by a birdcage body coil at 64 MHz on a human body model...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324777/a-feasibility-study-of-a-novel-spectral-method-using-radiofrequency-ultrasound-data-for-monitoring-laser-tissue-ablation
#16
Enrico Vannacci, Simona Granchi, Luca Breschi, Elena Biagi
This paper presents preliminary results of a new non-invasive ultrasound monitoring method called TUV (Thermotherapy Ultrasonic View) able to investigate structural tissue modifications caused by minimally invasive percutaneous laser ablation. The method, based on the spectral analysis of the raw ultrasound radiofrequency signal, develops spectral parameters in a multidimensional space and its N dimensions are represented by the central frequencies of the sub bands the signal spectrum is decomposed into. Signal processing has been performed on the data related to 7 laser treatments performed on 4 samples of removed prostatic glands which underwent laser ablation at power of 3W, 4W and 5W and energy of 1800J...
March 6, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28324620/exposure-to-electromagnetic-fields-from-smart-utility-meters-in-gb-part-i-laboratory-measurements
#17
Azadeh Peyman, Darren Addison, Terry Mee, Cristian Goiceanu, Myron Maslanyj, Simon Mann
Laboratory measurements of electric fields have been carried out around examples of smart meter devices used in Great Britain. The aim was to quantify exposure of people to radiofrequency signals emitted from smart meter devices operating at 2.4 GHz, and then to compare this with international (ICNIRP) health-related guidelines and with exposures from other telecommunication sources such as mobile phones and Wi-Fi devices. The angular distribution of the electric fields from a sample of 39 smart meter devices was measured in a controlled laboratory environment...
March 21, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28324272/lusutrombopag-increases-hematocytes-in-a-compensated-liver-cirrhosis-patient
#18
Akira Sakamaki, Takayuki Watanabe, Satoshi Abe, Kenya Kamimura, Atsunori Tsuchiya, Masaaki Takamura, Hirokazu Kawai, Satoshi Yamagiwa, Shuji Terai
A 56-year-old Japanese man with liver cirrhosis (LC) due to hepatitis C virus was admitted to our hospital for radiofrequency ablation of residual tumor following lusutrombopag administration. Laboratory tests revealed thrombocytopenia and leukopenia. The patient's LC was managed, and he was classified as Child-Pugh A. After admission, lusutrombopag was administered for 7 days. The platelet count increased to over 50,000/mm(3) after 7-14 days and returned to previous levels 50 days after administration. Leukocyte and erythrocyte counts also increased in response to the treatment and stayed elevated for over 120 days...
March 21, 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28323707/comparison-of-radiofrequency-targeted-vertebral-augmentation-with-balloon-kyphoplasty-for-the-treatment-of-vertebral-compression-fractures-2-year-results
#19
Rahel Bornemann, Tom R Jansen, Koroush Kabir, Peter H Pennekamp, Brit Stüwe, Dieter C Wirtz, Robert Pflugmacher
STUDY DESIGN: A retrospective study. OBJECTIVES: The aim of this study was the evaluation of the safety and effectiveness of radiofrequency-targeted vertebral augmentation (RF-TVA) in comparison with balloon kyphoplasty (BK) for the treatment of acute painful vertebral compression fractures (VCFs) on the basis of matched pairs. SUMMARY OF BACKGROUND: Vertebroplasty and BK are the common surgical interventions for the treatment of VCF. Both are effective and safe but pose some risks such as adjacent fractures and cement leakage...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28321815/immune-therapy-for-sarcomas
#20
Peter M Anderson
Absolute lymphocyte count (ALC) recovery rapidly occurring at 14 days after start of chemotherapy for osteosarcoma and Ewing sarcoma is a good prognostic factor. Conversely, lymphopenia is associated with significantly decreased sarcoma survival. Clearly, the immune system can contribute towards better survival from sarcoma. This chapter will describe treatment and host factors that influence immune function and how effective local control and systemic interventions of sarcoma therapy can cause inflammation and/or immune suppression but are currently the standard of care...
2017: Advances in Experimental Medicine and Biology
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