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intra-operative ultrasound

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https://www.readbyqxmd.com/read/28337285/preclinical-and-clinical-evaluation-of-the-liver-tumor-irreversible-electroporation-by-magnetic-resonance-imaging
#1
Matteo Figini, Xifu Wang, Tianchu Lyu, Zhanliang Su, Daniele Procissi, Vahid Yaghmai, Andrew C Larson, Zhuoli Zhang
Irreversible electroporation (IRE) is a relatively new technique for tumor ablation. It has shown promising results in difficult cases where surgery is not recommended and delicate anatomic structures are present near or within the tumor. Currently, liver cancer is one of the most common targets for IRE treatment. Pre-operative and post-operative imaging has a key role in IRE procedures and research studies. Although ultrasound is usually the first choice, especially for intra-operative guidance, magnetic resonance imaging (MRI) plays an important role in the visualization and characterization of tumor before and after IRE in clinical and preclinical studies...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28327582/real-time-sentinel-lymph-node-biopsy-guidance-using-combined-ultrasound-photoacoustic-fluorescence-imaging-in-vivo-proof-of-principle-and-validation-with-nodal-obstruction
#2
Jeeun Kang, Jin Ho Chang, Sun Mi Kim, Hak Jong Lee, Haemin Kim, Brian C Wilson, Tai-Kyong Song
Precise sentinel lymph node (SLN) identification is crucial not only for accurate diagnosis of micro-metastases at an early stage of cancer progression but also for reducing the number of SLN biopsies (SLNB) to minimize their severe side effects. Furthermore, it is desirable that an SLNB guidance should be as safe as possible in routine clinical use. Although there are currently various SLNB guidance methods for pre-operative or intra-operative assessment, none are ideal. We propose a real-time SLNB guidance method using contrast-enhanced tri-modal images (i...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28320558/can-intra-operative-fluorescence-play-a-significant-role-in-hepatobiliary-surgery
#3
REVIEW
A D Jones, J C Wilton
Liver resection remains the cornerstone of curative treatment for hepatocellular carcinoma and colorectal cancer liver metastases. Its success is dependent upon the extent of resection achieved. To this end, intra-operative imaging techniques have been experimented with to aid the surgeon. Fluorescence guided surgery (FGS) utilises the properties of near infrared light emitting molecules to identify malignant tissue, enabling the surgeon to maximise resection of diseased tissue and minimise collateral damage...
March 6, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28314199/unusual-ultrasound-appearance-of-small-bowel-intussusception-and-secondary-bowel-obstruction-in-a-child-with-peutz-jeghers-syndrome
#4
Lei Wu, Ramesh S Iyer, George T Drugas, A Luana Stanescu
Small bowel intussusception (SBI) in pediatric patients resolves spontaneously in the majority of cases. Pathologic small bowel intussusception with a lead point is rare in children. Ultrasound (US) is the preferred initial imaging study for the diagnosis of intussusception. We report a case of long-segment SBI and secondary bowel obstruction caused by a large hamartomatous polyp. This case emphasizes unique, atypical ultrasound findings that may be encountered in small bowel intussusception, with correlative radiographic, CT (computed tomography) and intra-operative findings...
March 9, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28303631/surgical-outcomes-of-percutaneous-nephrolithotomy-pcnl-in-3-402-patients-and-results-of-stone-analysis-in-1-559-patients-from-a-single-centre-in-pakistan
#5
S A H Rizvi, M Hussain, S H Askari, M Lal, M N Zafar
OBJECTIVE: To report our experience of a series of PCNL from a single centre over the last 18 years in terms of patients and stone characteristics, indications, stone clearance and complications and chemical analysis of stones in a subgroup. PATIENTS AND METHODS: We retrospectively analysed the outcomes of PCNL in 3,402 adult patients who underwent the procedure between 1997 and 2014 from a prospectively maintained database. Data analysis included patients' age, sex, laboratory investigations, imaging, punctured calyx, duration of operation, volume of irrigation fluid, radiation exposure time, blood transfusion, complications and stone free status at one-month follow-up...
March 16, 2017: BJU International
https://www.readbyqxmd.com/read/28295403/toward-a-3d-transrectal-ultrasound-system-for-verification-of-needle-placement-during-high-dose-rate-interstitial-gynecologic-brachytherapy
#6
Jessica Robin Rodgers, Kathleen Surry, Eric Leung, David D'Souza, Aaron Fenster
PURPOSE: Treatment for gynecologic cancers, such as cervical, recurrent endometrial, and vaginal malignancies, commonly includes external-beam radiation and brachytherapy. In high-dose-rate (HDR) interstitial gynecologic brachytherapy, radiation treatment is delivered via hollow needles that are typically inserted through a template on the perineum with a cylinder placed in the vagina for stability. Despite the need for precise needle placement to minimize complications and provide optimal treatment, there is no standard intra-operative image-guidance for this procedure...
March 15, 2017: Medical Physics
https://www.readbyqxmd.com/read/28278194/spectral-tissue-sensing-to-identify-intra-and-extravascular-needle-placement-a-randomized-single-blind-controlled-trial
#7
Andrea J R Balthasar, Geert-Jan van Geffen, Marjolein van der Voort, Gerald W Lucassen, Stefan Roggeveen, Ivar J Bruaset, Joergen Bruhn
Safe vascular access is a prerequisite for intravenous drug admission. Discrimination between intra- and extravascular needle position is essential for procedure safety. Spectral tissue sensing (STS), based on optical spectroscopy, can provide tissue information directly from the needle tip. The primary objective of the trial was to investigate if STS can reliably discriminate intra-vascular (venous) from non-vascular punctures. In 20 healthy volunteers, a needle with an STS stylet was inserted, and measurements were performed for two intended locations: the first was subcutaneous, while the second location was randomly selected as either subcutaneous or intravenous...
2017: PloS One
https://www.readbyqxmd.com/read/28275221/magnetic-resonance-mr-cholangiopancreatography-demonstration-of-the-cystic-duct-entering-the-right-hepatic-duct
#8
Tommaso D'Angelo, Sergio Racchiusa, Silvio Mazziotti, Giuseppe Cicero
BACKGROUND MR cholangiopancreatography is widely performed before laparoscopic cholecystectomy to rule out choledocholithiasis and to avoid iatrogenic injuries that may be related to the high frequency of anatomical variations of the biliary tree. Although most of these variants have already been demonstrated surgically and by endoscopic retrograde cholangiopancreatography and CT cholangiography, there are no references in which MR cholangiopancreatography has shown a cystic duct draining into the right hepatic biliary duct...
March 9, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28271356/geometric-modeling-of-hepatic-arteries-in-3d-ultrasound-with-unsupervised-mra-fusion-during-liver-interventions
#9
Maxime Gérard, François Michaud, Alexandre Bigot, An Tang, Gilles Soulez, Samuel Kadoury
PURPOSE: Modulating the chemotherapy injection rate with regard to blood flow velocities in the tumor-feeding arteries during intra-arterial therapies may help improve liver tumor targeting while decreasing systemic exposure. These velocities can be obtained noninvasively using Doppler ultrasound (US). However, small vessels situated in the liver are difficult to identify and follow in US. We propose a multimodal fusion approach that non-rigidly registers a 3D geometric mesh model of the hepatic arteries obtained from preoperative MR angiography (MRA) acquisitions with intra-operative 3D US imaging...
March 7, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28269437/artsens%C3%A2-mobile-a-portable-image-free-platform-for-automated-evaluation-of-vascular-stiffness
#10
Malay Ilesh Shah, Jayaraj Joseph, T Aryasree, Mohanasankar Sivaprakasam
Vascular stiffness is a key physiological marker significant in screening and early diagnosis of vascular disease. However, state of art techniques for vascular stiffness evaluation are not suited for field deployment. We present ARTSENS® Mobile, a portable, image-free ultrasound technology platform for automated evaluation of carotid artery stiffness, amenable for field deployment. The technology utilises a single element ultrasound transducer operated in pulse echo modality to investigate arterial wall dynamics, assisted by intelligent algorithms for wall identification and motion tracking to completely automate the measurement...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268533/curvelet-based-residual-complexity-objective-function-for-non-rigid-registration-of-pre-operative-mri-with-intra-operative-ultrasound-images
#11
P Farnia, B Makkiabadi, A Ahmadian, J Alirezaie
Intra-operative ultrasound as an imaging based method has been recognized as an effective solution to compensate non rigid brain shift problem in recent years. Measuring brain shift requires registration of the pre-operative MRI images with the intra-operative ultrasound images which is a challenging task. In this study a novel hybrid method based on the matching echogenic structures such as sulci and tumor boundary in MRI with ultrasound images is proposed. The matching echogenic structures are achieved by optimizing the Residual Complexity (RC) in the curvelet domain...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28248051/-brachytherapy-needle-steering-using-intra-tissue-real-time-ultrasound-3d-visualization
#12
N A Gryaznov, K Y Senchik, G S Kireeva, V V Kharlamov, D V Novitskiy, S A Nikitin
AIM: To explore in a model experiment the capability of the developed software for 3D- ultrasound imaging of tumors in the pelvic tissue phantom to steer a brachytherapy needle using 6-axis robotic arm. MATERIALS AND METHODS: The experiment employed a six-axis robotic arm with a device for moving the needle, a phantom with a tumor model and ultrasound scanner with biplane transducer. Controlled by the developed software, the robotic arm automatically inserted the needle in the phantom...
December 2016: Urologii︠a︡
https://www.readbyqxmd.com/read/28243813/systematic-review-the-impact-of-exercise-on-mesenteric-blood-flow-and-its-implication-for-preoperative-rehabilitation
#13
REVIEW
K A Knight, S J Moug, M A West
BACKGROUND: Exercise in the preoperative period, or prehabilitation, continues to evolve as an important tool in optimising patients awaiting major intra-abdominal surgery. It has been shown to reduce rates of post-operative morbidity and length of hospital stay. The mechanism by which this is achieved remains poorly understood. Adaptations in mesenteric flow in response to exercise may play a role in improving post-operative recovery by reducing rates of ileus and anastomotic leak. AIMS: To systematically review the existing literature to clarify the impact of exercise on mesenteric arterial blood flow using Doppler ultrasound...
February 27, 2017: Techniques in Coloproctology
https://www.readbyqxmd.com/read/28227683/artsens-%C3%A2-mobile-a-portable-image-free-platform-for-automated-evaluation-of-vascular-stiffness
#14
Malay Ilesh Shah, Jayaraj Joseph, T Aryasree, Mohanasankar Sivaprakasam, Malay Ilesh Shah, Jayaraj Joseph, T Aryasree, Mohanasankar Sivaprakasam, T Aryasree, Mohanasankar Sivaprakasam, Jayaraj Joseph, Malay Ilesh Shah
Vascular stiffness is a key physiological marker significant in screening and early diagnosis of vascular disease. However, state of art techniques for vascular stiffness evaluation are not suited for field deployment. We present ARTSENS(®) Mobile, a portable, image-free ultrasound technology platform for automated evaluation of carotid artery stiffness, amenable for field deployment. The technology utilises a single element ultrasound transducer operated in pulse echo modality to investigate arterial wall dynamics, assisted by intelligent algorithms for wall identification and motion tracking to completely automate the measurement...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226708/curvelet-based-residual-complexity-objective-function-for-non-rigid-registration-of-pre-operative-mri-with-intra-operative-ultrasound-images
#15
P Farnia, B Makkiabadi, A Ahmadian, J Alirezaie, P Farnia, B Makkiabadi, A Ahmadian, J Alirezaie, B Makkiabadi, A Ahmadian, P Farnia, J Alirezaie
Intra-operative ultrasound as an imaging based method has been recognized as an effective solution to compensate non rigid brain shift problem in recent years. Measuring brain shift requires registration of the pre-operative MRI images with the intra-operative ultrasound images which is a challenging task. In this study a novel hybrid method based on the matching echogenic structures such as sulci and tumor boundary in MRI with ultrasound images is proposed. The matching echogenic structures are achieved by optimizing the Residual Complexity (RC) in the curvelet domain...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226325/lung-ultrasound-in-hemodialysis-a-card-to-be-played
#16
Pierpaolo Di Nicolò, Giacomo Magnoni, Antonio Granata
The end-stage renal disease is characterized by a profound impairment in the regulation of body fluid distribution, and volume assessment in hemodialysis is one of the challenging goals for the nephrologist. To determine a state of euvolemia, different validated techniques have been employed and among them lung ultrasonography (LUS) has recently attracted growing attention on account of its capacity to estimate accurately extra vascular lung water and to detect lung edema even in its early asymptomatic stage, that is, hidden lung congestion...
February 23, 2017: Blood Purification
https://www.readbyqxmd.com/read/28211807/two-dimensional-shear-wave-elastography-of-breast-lesions-comparison-of-two-different-systems
#17
Wei-Wei Ren, Xiao-Long Li, Ya-Ping He, Dan-Dan Li, Dan Wang, Chong-Ke Zhao, Xiao-Wan Bo, Bo-Ji Liu, Wen-Wen Yue, Hui-Xiong Xu
OBJECTIVE: To evaluate the diagnostic performance of two different shear wave elastography (SWE) techniques in distinguishing malignant breast lesions from benign ones. MATERIALS AND METHODS: From March 2016 to May 2016, a total of 153 breast lesions (mean diameter, 16.8 mm±10.5; range 4.1-90.0 mm) in 153 patients (mean age, 46.4 years±15.1; age range 20-86 years) were separately performed by two different SWE techniques (i.e. T-SWE, Aplio500, Toshiba Medical System, Tochigi, Japan; and S-SWE, the Aixplorer US system, SuperSonic Imagine, Provence, France)...
February 17, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28210824/ultrasound-palpation-for-fast-in-situ-quantification-of-articular-cartilage-stiffness-thickness-and-relaxation-capacity
#18
M Schöne, R M Schulz, H Tzschätzsch, P Varga, K Raum
Most current cartilage testing devices require the preparation of excised samples and therefore do not allow intra-operative application for diagnostic purposes. The gold standard during open or arthroscopic surgery is still the subjective perception of manual palpation. This work presents a new diagnostic method of ultrasound palpation (USP) to acquire applied stress and strain data during manual palpation of articular cartilage. With the proposed method, we obtain cartilage thickness and stiffness. Moreover, repeated palpations allow the quantification of relaxation effects...
February 16, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28174660/mrgfus-for-desmoid-tumors-within-the-thigh-early-clinical-experiences
#19
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/28166812/efficacy-of-high-intensity-focused-ultrasound-assisted-hepatic-resection-hifu-ar-on-blood-loss-reduction-in-patients-with-liver-metastases-requiring-hepatectomy-study-protocol-for-a-randomized-controlled-trial
#20
Aurélien Dupré, David Pérol, Ellen Blanc, Patrice Peyrat, Valéria Basso, Yao Chen, Jérémy Vincenot, Anthony Kocot, David Melodelima, Michel Rivoire
BACKGROUND: Liver resection is the only potentially curative treatment for colorectal liver metastases (LM). It is considered a safe procedure, but is often associated with blood loss during liver transection. Blood transfusions are frequently needed, but they are associated with increased morbidity and risk of recurrence. Many surgical devices have been developed to decrease blood loss. However, none of them has proven superior to the standard crushing technique. We developed a new, powerful intra-operative high-intensity focused ultrasound (HIFU) transducer which destroys tissue by coagulative necrosis...
February 6, 2017: Trials
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