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https://www.readbyqxmd.com/read/28929215/needle-tip-visibility-in-3d-ultrasound-images
#1
Muhammad Arif, Adriaan Moelker, Theo van Walsum
AIM: Needle visibility is crucial for effective and safe ultrasound-guided interventional procedures. Several studies have investigated needle visibility in 2D ultrasound imaging, but less information is available for 3D ultrasound imaging, a modality that has great potential for image guidance interventions. We performed a prospective study, to quantitatively compare the echogenicity of various commercially available needles in 3D ultrasound images used in clinical practice under freehand needle introduction...
September 19, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28920775/laparoscopic-assisted-insertion-of-a-ventriculoperitoneal-shunt-in-a-rescued-asiatic-black-bear-ursus-thibetanus-in-laos
#2
Romain Pizzi, Jonathan Mark Cracknell, Andrew C Kitchener, Nev Broadis, Denise Laughlin, Kirsty Officer, Yolanda Martinez Pereira, Matt Hunt
A 3-yr-old Asiatic black bear (Ursus thibetanus), weighing 68 kg, underwent a laparoscopic-assisted placement of a ventriculoperitoneal shunt for hydrocephalus in the Lao People's Democratic Republic. Rescued as a young cub with a notably domed head, the bear's condition had deteriorated with age, but euthanasia was not a viable option because of cultural issues. Surgery was attempted as a palliative measure. The bear had ventrally orientated crossed eyes (abducens nerve palsy and dorsal midbrain syndrome), papilledema, severe rhinorrhea, depressed mentation, lethargy, a very poor appetite, and was stunted...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28917643/a-novel-3-dimensional-electromagnetic-guidance-system-increases-intraoperative-microwave-antenna-placement-accuracy
#3
Amit V Sastry, Jacob H Swet, Keith J Murphy, Erin H Baker, Dionisios Vrochides, John B Martinie, Iain H McKillop, David A Iannitti
BACKGROUND: Failure to locate lesions and accurately place microwave antennas can lead to incomplete tumor ablation. The Emprint™ SX Ablation Platform employs real-time 3D-electromagnetic spatial antenna tracking to generate intraoperative laparoscopic antenna guidance. We sought to determine whether Emprint™ SX affected time/accuracy of antenna-placement in a laparoscopic training model. METHODS: Targets (7-10 mm) were set in agar within a laparoscopic training device...
September 13, 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/28910761/phantomless-auto-calibration-and-online-calibration-assessment-for-a-tracked-freehand-2d-ultrasound-probe
#4
Matthew Toews, William M Wells
This paper presents a method for automatically calibrating and assessing the calibration quality of an externally tracked 2D ultrasound (US) probe by scanning arbitrary, natural tissues, as opposed a specialized calibration phantom as is the typical practice. A generative topic model quantifies the posterior probability of calibration parameters conditioned on local 2D image features arising from a generic underlying substrate. Autocalibration is achieved by identifying the maximum a-posteriori (MAP) image-to-probe transform, and calibration quality is assessed online in terms of the posterior probability of the current image-to-probe transform...
September 11, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28891280/pelvic-floor-evaluation-with-transperineal-ultrasound-a-new-approach
#5
Francesca Vellucci, Cristina Regini, Chiara Barbanti, Stefano Luisi
The increased life expectancy, the importance of the prevention in younger age and the role of the pelvic floor disfunction not only in the disease of the third age, but also in the childbearing age, as the influence on the type of delivery, underline the importance of the evaluation of the pelvic floor. The evaluation of pelvic floor is generally clinical, but in the last 2 decades, the use of ultrasound has become a mainstream diagnostic tool in the investigation of female pelvic organ prolapse, urinary and fecal incontinence and defecation disorders, providing an immediate objective confirmation of findings obtained on clinical examination and filling some of the gaps of the urogynecological exam...
September 5, 2017: Minerva Ginecologica
https://www.readbyqxmd.com/read/28883087/modulation-of-muscle-tendon-interaction-in-the-human-triceps-surae-during-an-energy-dissipation-task
#6
Amelie Werkhausen, Kirsten Albracht, Neil J Cronin, Rahel Meier, Jens Bojsen-Møller, Olivier R Seynnes
The compliance of elastic elements allows muscles to dissipate energy safely during eccentric contractions. This buffering function is well documented in animal models but our understanding of its mechanism in humans is confined to non-specific tasks, requiring a subsequent acceleration of the body. The present study aimed to examine the behaviour of the human triceps surae muscle-tendon unit (MTU) during a pure energy dissipation task, under two loading conditions.Thirty-nine subjects performed a single-leg landing task, with- and without added mass...
September 7, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28877098/a-3-dimensional-printed-ultrasound-probe-visuospatial-trainer
#7
Ryan T McKenna, Jesse C Dove, Robert A Ratzlaff, Jose L Diaz-Gomez, Daniel J Cox, Leslie V Simon
Training adult learners to use ultrasound in clinical practice relies on the ability of the learner to apply visuospatial concepts to the anatomy of the human body. We describe a visuospatial trainer that replicates the housing of an ultrasound transducer, through which a linear laser projects light in the same plane and orientation as the ultrasonic sound waves. We use this trainer in combination with a porcine heart dissection laboratory to teach bedside cardiac ultrasound and transthoracic echocardiography (TTE)...
September 4, 2017: Ultrasound Quarterly
https://www.readbyqxmd.com/read/28875339/c-arm-cone-beam-ct-for-intraprocedural-image-fusion-and-3d-guidance-in-portal-vein-embolization-pve
#8
Willie M Lüdemann, Georg Böning, Julius Chapiro, Martin Jonczyk, Dominik Geisel, Dirk Schnapauff, Gero Wieners, Moritz Schmelzle, Sascha Chopra, Rolf W Günther, Bernhard Gebauer, Florian Streitparth
PURPOSE: Portal vein embolization (PVE) is applied in patients with extended oncologic liver disease to induce hyperplasia of the future liver remnant and make resection feasible. Ultrasound (US) guidance is the gold standard for percutaneous portal vein access. This study evaluated feasibility and safety of C-arm cone beam computed tomography (CBCT) for needle guidance. MATERIALS AND METHODS: In 10 patients, puncture was performed under 3D needle guidance in a CBCT data set...
September 5, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28869199/reliability-of-measuring-half-cycle-cervical-range-of-motion-may-be-increased-using-a-spirit-level-for-calibration
#9
Jan Wilke, Daniel Niederer, Lutz Vogt, Winfried Banzer
BACKGROUND: Assessments of range of motion (ROM) represent an essential part of clinical diagnostics. Ultrasonic movement analyses have been demonstrated to provide reliable results when analyzing complete amplitudes (e.g., flexion-extension). However, due to subjective determination of the starting position, the assessment of half-cycle movements (e.g, flexion only) is less reproducible. OBJECTIVES: The present study aimed to examine the reliability of measuring half-cycle cervical ROM using a spirit level for calibration...
August 24, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28864044/transvaginal-ultrasound-for-the-diagnosis-of-adenomyosis-systematic-review-and-meta-analysis
#10
REVIEW
Marina Paula Andres, Giuliano Moysés Borrelli, Juliana Ribeiro, Edmund Chada Baracat, Mauricio Simões Abrão, Rosanne M Kho
Adenomyosis is characterized by the presence of ectopic foci of endometrial glandular tissue and/or stroma within the myometrium. The diagnosis of adenomyosis is made traditionally through histological evaluation of the post-surgical specimen. More recently, imaging with transvaginal ultrasound (TVUS) has been used for the pre-operative diagnosis of adenomyosis. As yet, there is no consensus regarding the best imaging feature or combination thereof for the non-surgical diagnosis of adenomyosis. This study systematically evaluates the literature in the last 10 years to determine the accuracy of TVUS 2D, different imaging features, enhancing methods such as TVUS 3D, elastography and color Doppler in the non-surgical diagnosis of adenomyosis...
August 29, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28862124/3d-ultrasound-and-virtual-touch%C3%A2-in-breast-tumors-two-clinical-cases
#11
Claudiu V Leonida, Alina Topciu
Visualization of infraclinical malignant lesions using 3D breast ultrasound, and differentiation of benign and malignant lesions using ARFI Virtual Touch® technology in two patients. 3D ultrasound is useful in early detection of architectural distortions, even in the soft tissue of the breast, and Virtual Touch® ARFI differentiates more accurately malignant vs. benign lesions, allowing the patient to be regraded in the BiRADS score (increasing or decreasing the BiRADS score, depending on the situation).
July 2017: Chirurgia
https://www.readbyqxmd.com/read/28862111/how-can-we-improve-education-of-breast-surgeons-across-europe
#12
Agnieszka Kolacinska
The proposed global curriculum developed by the American Society of Surgical Oncology (SSO) and the European Society of Surgical Oncology (ESSO) and the textbook: provides a state-of- the- art of breast cancer surgery, complements the syllabus and curriculum of the Union Europeenne des Medecins Specialistes (UEMS) examination in breast surgery/ European Board of Surgery Qualification in Breast Surgery (EBSQinBS) administered by ESSO (1) Knowledge and understanding of the principles of breast cancer incidence, aetiology, risk factors, genetics, premalignant and high-risk lesions, pathology, prognostic and predictive factors, risk prediction models, screening, diagnosis and imaging, breast cancer, oncoplastic, reconstructive breast surgery, axillary surgery and future perspective for this, radiation therapy, neoadjuvant and adjuvant systemic treatment- endocrine-, immuno- and chemotherapy, side effects and toxicities of treatment, locoregional recurrence, follow-up, locally advanced breast cancer, metastatic breast cancer, breast cancer in young and elderly patients, survivor issues, lymphedema, palliative care, chroni pain, body image and sexuality, fertility issues, cognitive functions, etc...
July 2017: Chirurgia
https://www.readbyqxmd.com/read/28861704/multimodal-image-registration-based-on-binary-gradient-angle-descriptor
#13
Dongsheng Jiang, Yonghong Shi, Demin Yao, Yifeng Fan, Manning Wang, Zhijian Song
PURPOSE: Multimodal image registration plays an important role in image-guided interventions/therapy and atlas building, and it is still a challenging task due to the complex intensity variations in different modalities. METHODS: The paper addresses the problem and proposes a simple, compact, fast and generally applicable modality-independent binary gradient angle descriptor (BGA) based on the rationale of gradient orientation alignment. The BGA can be easily calculated at each voxel by coding the quadrant in which a local gradient vector falls, and it has an extremely low computational complexity, requiring only three convolutions, two multiplication operations and two comparison operations...
August 31, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28847028/pelvic-floor-3d-ultrasound-of-women-with-a-tvt-tvt-o-or-tvt-s-for-stress-urinary-incontinence-at-the-three-year-follow-up
#14
Claudinei A Rodrigues, Ana Maria H M Bianchi-Ferraro, Eliana Viana Monteiro Zucchi, Marair G F Sartori, Manoel J B C Girão, Zsuzsanna I K Jarmy-Di Bella
Objective Using three-dimensional ultrasound (3D-US), we aimed to compare the tape position and the angle formed by the sling arms in different techniques of mid-urethral sling insertion for the surgical treatment of stress urinary incontinence, three years after surgery. In addition, we examined the correlations between the US findings and the clinical late postoperative results. Methods A prospective cross-sectional cohort study of 170 patients who underwent a sling procedure between May 2009 and December 2011 was performed...
September 2017: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/28846911/testicular-volumetry-and-prediction-of-daily-sperm-output-in-stallions-by-orchidometry-and-two-and-three-dimensional-sonography
#15
S Pricking, H Bollwein, K Spilker, G Martinsson, A Schweizer, S Thomas, H Oldenhof, H Sieme
Accurate determination of the testes volume and prediction of the daily sperm output (DSO) is valuable information for reproductive management of a stallion. The aim of this study was to compare different methods for measuring the testes volume, including caliper, 2D and 3D ultrasound. Special emphasis was on feasibility of 3D volume analysis. First, 22 castrated testes were measured and derived volumes were compared with volumes determined via volume displacement in a graded cylinder with saline solution. Then, during the breeding season, testes sizes of 52 stallions were measured in vivo and analyzed...
August 19, 2017: Theriogenology
https://www.readbyqxmd.com/read/28845941/-ultrasound-guided-percutaneous-cryoablation-of-renal-tumors
#16
D V Enikeev, P V Glybochko, Yu G Alyaev, L M Rapoport, A V Amosov, T M Alekseeva, M E Enikeev, D G Tsarichenko, D V Chinenov, L D Kozmin, Z K Dzhalaev, M S Taratkin
INTRODUCTION: Surgery remains the gold-standard curative treatment for localized (T1) renal carcinoma. However, recent medical-technological advances have led to the development of new minimally invasive treatment options, one of which is percutaneous cryoablation. AIM: To assess the effectiveness and safety of ultrasound-guided percutaneous cryoablation of renal tumors. MATERIALS AND METHODS: The study comprised 12 patients aged 52 to 76 years who underwent ultrasound-guided percutaneous cryoablation of renal tumors from 2015 to 2017...
July 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28844925/case-study-multimodal-18-f-fluciclovine-pet-mri-and-ultrasound-guided-neurosurgery-of-an-anaplastic-oligodendroglioma
#17
Anna Karlberg, Erik Magnus Berntsen, Håkon Johansen, Mariane Myrthue, Anne Jarstein Skjulsvik, Ingerid Reinertsen, Morteza Esmaeili, Hong Yan Dai, Yiming Xiao, Hassan Rivaz, Per Borghammer, Ole Solheim, Live Eikenes
BACKGROUND: Structural MRI and histopathological tissue sampling are routinely performed as part of the diagnostic work-up of glioma patients. Due to the heterogeneous nature of gliomas, there is however a risk of undergrading caused by histopathological sampling errors. MRI has limitations in identifying tumor grade and type, detecting diffuse invasive growth, and separating recurrences from treatment induced changes. PET can provide quantitative information of cellular activity and metabolism, and may therefore complement MRI...
August 24, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28844663/radiological-assessment-of-the-placement-of-essure-%C3%A2-in-order-to-reduce-hysterosalpingography-pelvic-x-ray-versus-combined-pelvic-x-ray-and-ultrasound
#18
C Petit, T Vernet, P Verpillat, C Rubod, M Cosson, G Giraudet
OBJECTIVE: Three months after hysteroscopic sterilisation with Essure(®), a confirmation test is required to evaluate the correct location of the inserts. The test may be conducted using a pelvic ultrasound (2D or 3D) or an abdominal X-ray. Should the location not look satisfactory on these tests, a follow-up hysterosalpingography (HSG) would be required. The objective of our study is to assess whether the Essure(®) 3-month confirmation test using a single X-ray or a combination of X-ray and ultrasound could reduce the use of HSG...
August 24, 2017: Journal of gynecology obstetrics and human reproduction
https://www.readbyqxmd.com/read/28832256/3d-tendon-strain-estimation-using-high-frequency-volumetric-ultrasound-images-a-feasibility-study
#19
Catarina Carvalho, Pieter Slagmolen, Stijn Bogaerts, Lennart Scheys, Jan D'hooge, Koen Peers, Frederik Maes, Paul Suetens
Estimation of strain in tendons for tendinopathy assessment is a hot topic within the sports medicine community. It is believed that, if accurately estimated, existing treatment and rehabilitation protocols can be improved and presymptomatic abnormalities can be detected earlier. State-of-the-art studies present inaccurate and highly variable strain estimates, leaving this problem without solution. Out-of-plane motion, present when acquiring two-dimensional (2D) ultrasound (US) images, is a known problem and may be responsible for such errors...
August 1, 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28830850/irreversible-electroporation-for-the-treatment-of-localized-prostate-cancer-a-summary-of-imaging-findings-and-treatment-feedback
#20
Matthijs J Scheltema, Arnoud W Postema, Daniel M de Bruin, Mara Buijs, Marc R Engelbrecht, M Pilar Laguna, Hessel Wijkstra, Theo M de Reijke, Jean J M C H de la Rosette
PURPOSE: Imaging plays a crucial role in ablative therapies for prostate cancer (PCa). Irreversible electroporation (IRE) is a new treatment modality used for focal treatment of PCa. We aimed to demonstrate what imaging modalities can be used by descriptively reporting contrast-enhanced ultrasonography (CEUS), multiparametric magnetic resonance imaging (mpMRI), and grey-scale transrectal ultrasound (TRUS) results. Furthermore, we aimed to correlate quantitatively the ablation zone seen on mpMRI and CEUS with treatment planning to provide therapy feedback...
August 22, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
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