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https://www.readbyqxmd.com/read/28230611/values-for-bony-acetabular-roof-angle-and-percentage-femoral-head-cover-in-a-selective-ultrasound-neonatal-hip-screening-programme-effect-of-age-sex-and-side
#1
A Graham Wilkinson, Sally Wilkinson, Robert A Elton
Published maturation curves for bony acetabular roof or α angle (AA) and percentage femoral head cover (FHC) with age are sparse. We aimed to determine typical values for AA and FHC in 2236 infants referred to a selective ultrasound screening programme. There was increase in the values of first measurement of AA and FHC related to the logarithm of age. Males had greater values than females (P<0.001) and right hips had greater values than left (P<0.001) for both measurements. Significant side differences have not been reported previously...
February 22, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28230569/procedure-oriented-torsional-anatomy-of-the-hand-for-spasticity-injection
#2
Joslyn John, John Cianca, Faye Chiou-Tan, Sindhu Pandit, Erin Furr-Stimming, Katherine H Taber
OBJECTIVES: To provide musculoskeletal ultrasound (MSKUS) images of hand anatomy in the position of hemiparetic flexion as a reference for spasticity injections. After a stroke, spasticity can result in anatomic distortion of the hand. Spasticity may require treatment with botulinum toxin or phenol injections. Anatomic distortion may decrease the accuracy of injections. Standard anatomic references are of limited utility because they are not in this spastic hemiparetic position. There presently is no anatomic reference in the literature for these spastic postures...
February 23, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28230006/evaluation-of-the-safety-and-efficacy-of-percutaneous-radiofrequency-ablation-for-treating-multiple-breast-fibroadenoma
#3
Ping Li, Tang Xiao-Yin, Dan Cui, Jia-Chang Chi, Zhi Wang, Tao Wang, Xing-Xing Qi, Bo Zhai
BACKGROUND: This study was conducted to evaluate the safety and efficacy of ultrasound (US)-guided percutaneous radiofrequency ablation (RFA) for multiple breast fibroadenoma as an alternative to surgical resection. PATIENTS AND METHODS: Sixty-five patients with multiple breast fibroadenoma accepted general anesthesia and US-guided percutaneous RFA in our hospital from September 2014 to January 2016. Contrast-enhanced US (CEUS) was used immediately after operation to determine whether the tumor was ablated completely...
December 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28229252/pain-in-patients-with-pancreatic-cancer-prevalence-mechanisms-management-and-future-developments
#4
REVIEW
Andreas I Koulouris, Paul Banim, Andrew R Hart
Pain affects approximately 80% of patients with pancreatic cancer, with half requiring strong opioid analgesia, namely: morphine-based drugs on step three of the WHO analgesic ladder (as opposed to the weak opioids: codeine and tramadol). The presence of pain is associated with reduced survival. This article reviews the literature regarding pain: prevalence, mechanisms, pharmacological, and endoscopic treatments and identifies areas for research to develop individualized patient pain management pathways. The online literature review was conducted through: PubMed, Clinical Key, Uptodate, and NICE Evidence...
February 22, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28229211/multicenter-international-experience-of-532%C3%A2-nm-laser-photo-vaporization-with-greenlight-xps-in-men-with-large-prostates-prostate-volume%C3%A2-%C3%A2-100%C3%A2-cc
#5
Malek Meskawi, Pierre-Alain Hueber, Roger Valdivieso, Franck Bruyere, Vincent Misrai, Georges Fournier, Ravi Munver, Ganesh Sivarajan, Matthew Rutman, Alexis E Te, Bilal Chughtai, Dean Elterman, Tristan Martel, Mounsif Azizi, Pierre I Karakiewicz, Kevin C Zorn
PURPOSE: To evaluate the outcomes and durability of photoselective vaporization of the prostate (PVP) using the XPS-180 system in patients with a large prostate volume (PV) > 100 cc at 4 years of follow-up in a large, multicenter experience. METHODS: 438 men with pre-operative transrectal ultrasound (TRUS) PV > 100 cc were treated in eight experienced centers in Canada, USA, and in France with the Greenlight XPS laser using PVP for the treatment of symptomatic BPH...
February 22, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28229074/imaging-of-cholangiocarcinoma
#6
REVIEW
Susann-Cathrin Olthof, Ahmed Othman, Stephan Clasen, Christina Schraml, Konstantin Nikolaou, Malte Bongers
Cholangiocarcinoma (CC) is the second most common primary hepatobiliary tumour, and it is increasing in incidence. Imaging characteristics, behaviour, and therapeutic strategies in CC differ significantly, depending on the morphology and location of the tumour. In cross-sectional imaging, CCs can be classified according to the growth pattern (mass-forming, periductal infiltrating, intraductal) and the location (intrahepatic, perihilar, extrahepatic/distal). The prognosis of CC is unfavourable and surgical resection is the only curative treatment option; thus, early diagnosis (also in recurrent disease) and accurate staging including the evaluation of lymph node involvement and vascular infiltration is crucial...
December 2016: Visceral Medicine
https://www.readbyqxmd.com/read/28229071/bilateral-vertebral-venous-sinus-thrombosis-causing-cervical-spinal-cord-compression-in-a-dog
#7
Kathryn E Rhue, Amanda R Taylor, Robert C Cole, Randolph L Winter
A 10-year-old male neutered mixed breed dog was evaluated for cervical hyperesthesia and tetraparesis. Magnetic resonance imaging of the brain and cervical spinal cord identified an extradural compressive lesion over the body of C2 caused by marked dilation of the vertebral venous sinuses. Following intravenous contrast administration both vertebral sinuses had heterogeneous contrast enhancement consistent with incomplete thrombi formation. An abdominal ultrasound also showed a distal aortic thrombus. A definitive cause for the thrombi formation was not identified, but the patient had several predisposing factors which may have contributed...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28228430/atypical-case-of-preterm-ovarian-hyperstimulation-syndrome
#8
Michelle A Durst, Brandy Wicklow, Michael Narvey
Preterm ovarian hyperstimulation syndrome is a rare syndrome in which preterm infant girls have hypogastric, upper leg and labial swelling accompanied by elevated serum oestradiol levels and ovarian follicular cysts on ultrasound. Our case is an infant born at 23 weeks gestational age who at 30 weeks postconceptional age (PCA) developed elevated 17-hydroxyprogesterone on her newborn screen with associated clitoromegaly and a ventral groove on the inferior aspect of the erectile tissue. An initial pelvic ultrasound at 32 weeks PCA demonstrated a normal appearing uterus, but the ovaries were not visualised...
February 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28227791/nonlinear-3-d-simulation-of-high-intensity-focused-ultrasound-therapy-in-the-kidney
#9
Visa Suomi, Jiri Jaros, Bradley Treeby, Robin Cleveland, Visa Suomi, Jiri Jaros, Bradley Treeby, Robin Cleveland, Jiri Jaros, Bradley Treeby, Robin Cleveland, Visa Suomi
Kidney cancer is a severe disease which can be treated non-invasively using high-intensity focused ultrasound (HIFU) therapy. However, tissue in front of the transducer and the deep location of kidney can cause significant losses to the efficiency of the treatment. The effect of attenuation, refraction and reflection due to different tissue types on HIFU therapy of the kidney was studied using a nonlinear ultrasound simulation model. The geometry of the tissue was derived from a computed tomography (CT) dataset of a patient which had been segmented for water, bone, soft tissue, fat and kidney...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227413/segmentation-of-the-metacarpus-and-phalange-in-musculoskeletal-ultrasound-images-using-local-active-contours
#10
Nelson Martins, Malik Saad Sultan, Diana Veiga, Manuel Ferreira, Miguel Coimbra, Nelson Martins, Malik Saad Sultan, Diana Veiga, Manuel Ferreira, Miguel Coimbra, Diana Veiga, Nelson Martins, Malik Saad Sultan, Miguel Coimbra, Manuel Ferreira
This work presents a method for the automatic segmentation of metacarpus and phalange bones in ultrasound images of the second metacarpophalangeal joint (MCPJ) using Active Contours. The MCPJ is known to be the one of the first structures to be affected by rheumatic diseases like rheumatoid arthritis. The early detection and follow-up of this disease is important to prevent irreversible damage of the joints, which occurs continuously and faster if no treatment is used. To our knowledge, there is no automatic system to quantify the extension of the lesions resulting from rheumatic activity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227216/prediction-of-individual-prosthesis-size-for-valve-sparing-aortic-root-reconstruction-based-on-geometric-features
#11
J Hagenah, E Werrmann, M Scharfschwerdt, F Ernst, C Metzner, J Hagenah, E Werrmann, M Scharfschwerdt, F Ernst, C Metzner, C Metzner, E Werrmann, J Hagenah, F Ernst, M Scharfschwerdt
Valve-sparing aortic root reconstruction is an up- and-coming approach for patients suffering from aortic valve insufficiencies which promises to significantly reduce complications. However, the success of the treatment strongly depends on the challenging task of choosing the correct size of the prosthesis, for which, up to now, surgeons solely have to rely on their experience. Here, we present a novel machine learning based approach, which might make it possible to predict the size of the prosthesis from pre-operatively acquired ultrasound images...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227205/low-frequency-ultrasound-radiosensitization-and-therapy-response-monitoring-of-tumors-an-in-vivo-study
#12
Ali Sadeghi-Naini, Martin Stanisz, Hadi Tadayyon, Jaswinder Taank, Gregory J Czarnota, Ali Sadeghi-Naini, Martin Stanisz, Hadi Tadayyon, Jaswinder Taank, Gregory J Czarnota, Jaswinder Taank, Hadi Tadayyon, Martin Stanisz, Ali Sadeghi-Naini, Gregory J Czarnota
A new framework has been introduced in this paper for tumor radiosensitization and therapy response monitoring using low-frequency ultrasound. Human fibrosarcoma xenografts grown in severe combined immunodeficiency (SCID) mice (n = 108) were treated using ultrasound-stimulated microbubbles at various concentration and exposed to different doses of radiation. Low-frequency ultrasound radiofrequency (RF) data were acquired from tumors prior to and at different times after treatment. Quantitative ultrasound (QUS) techniques were applied to generate spectral parametric maps of tumors...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227128/boundary-element-simulation-of-ultrasonic-backscattering-during-the-fracture-healing-process
#13
Vassiliki T Potsika, Konstantinos N Grivas, Theodoras Gortsas, Vasilios C Protopappas, Demosthenes K Polyzos, Dimitrios I Fotiadis, Vassiliki T Potsika, Konstantinos N Grivas, Theodoras Gortsas, Vasilios C Protopappas, Demosthenes K Polyzos, Dimitrios I Fotiadis, Dimitrios I Fotiadis, Theodoros Gortsas, Vasilios C Protopappas, Vassiliki T Potsika, Konstantinos N Grivas, Demosthenes K Polyzos
Competent fracture healing monitoring and treatment requires an extensive knowledge of bone biology and microstructure. The use of non-invasive and non-radiating means for the monitoring of the bone healing process has gained significant interest in recent years. Ultrasound is considered as a modality which can contribute to the assessment of bone status during the healing process, as well as, enhance the rate of the tissues' ossification. This work presents boundary element simulations of ultrasound propagation in healing long bones to investigate the monitoring potential of backscattering parameters...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226690/polarity-detection-in-ultrasound-current-source-density-imaging
#14
Zhaohui Wang, Wei-Da Hao, Chung S Leung, Sung-Won Park, Zhaohui Wang, Wei-Da Hao, Chung S Leung, Sung-Won Park, Chung S Leung, Zhaohui Wang, Sung-Won Park, Wei-Da Hao
Modulating the electric dipole field with ultrasound pulse, ultrasound current source density imaging (UCSDI) can detect current direction and form spatial 3D imaging of dipole changing in one period of treatment. As ultrasound pulse passes through the conductive media, it convolves/correlates with the inner product of the electric field of a dipole and lead field of a pair of detectors, making the shifting frequency of polarity lower than the center frequency of the ultrasound pulse. After acoustoelectric (AE) signal is shifted to base band, the AE voltage is positive at anode and negative at cathode...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226678/hip-segmentation-from-mri-volumes-in-infants-for-ddh-diagnosis-and-treatment-planning
#15
Abhilash Rakkunedeth Hareendranathan, Dornoosh Zonoobi, Myles Mabee, Chad Diederichs, Kumaradevan Punithakumar, Michelle Noga, Jacob L Jaremko, Abhilash Rakkunedeth Hareendranathan, Dornoosh Zonoobi, Myles Mabee, Chad Diederichs, Kumaradevan Punithakumar, Michelle Noga, Jacob L Jaremko, Jacob L Jaremko, Myles Mabee, Dornoosh Zonoobi, Michelle Noga, Chad Diederichs, Kumaradevan Punithakumar, Abhilash Rakkunedeth Hareendranathan
Diagnosis and surgical management of Developmental Dysplasia of the Hip (DDH) relies on physical examination and 2D ultrasound scanning. Magnetic Resonance Imaging (MRI) can be used to complement existing techniques and could be advantageous in treatment planning due to its larger field of view. In this paper we propose a semi-automatic method to segment surface models of the acetabulum from MRI images. The method incorporates clinical knowledge in the form of intensity priors which are integrated into a Random Walker (RW) formulation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226508/temperature-monitoring-during-radiofrequency-ablation-of-liver-in-vivo-trials
#16
P Saccomandi, G Frauenfelder, C Massaroni, M A Caponera, A Polimadei, F Taffoni, F M Di Matteo, G Costamagna, F Giurazza, E Schena, P Saccomandi, G Frauenfelder, C Massaroni, M A Caponera, A Polimadei, F Taffoni, F M Di Matteo, G Costamagna, F Giurazza, E Schena, F Taffoni, F M Di Matteo, F Giurazza, E Schena, G Costamagna, A Polimadei, G Frauenfelder, P Saccomandi, C Massaroni
Radiofrequency ablation (RFA) is a minimally invasive procedure used to treat tumors by means of hyperthermia, mostly through percutaneous approach. The tissue temperature plays a pivotal role in the achievement of the target volume heating, while sparing the surrounding healthy tissue from thermal damage. Several techniques for thermometry during RFA are investigated, most of them based on the use of single-point measurement system (e.g., thermocouples). The measurement of temperature map is crucial for the real-time control and fine adjustment of the treatment settings, to optimize the shape and size of the ablated volume...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225988/estimation-of-cardiovascular-risk-and-detection-of-subclinical-carotid-atheromatosis-in-patients-with-diabetes-without-a-history-of-cardiovascular-disease
#17
Walter Masson, Salvador De Francesca, Micaela Molinero, Daniel Siniawski, Andrés Mulassi, Frank Espinoza Morales, Melina Huerin, Martín Lobo, Graciela Molinero
Objectives: Cardiovascular risk estimated by several scores in patients with diabetes mellitus without a cardiovascular disease history and the association with carotid atherosclerotic plaque (CAP) were the aims of this study. Materials and methods: Cardiovascular risk was calculate using United Kingdom Prospective Diabetes Study (UKPDS) risk engine, Framingham risk score for cardiovascular (FSCV) and coronary disease (FSCD), and the new score (NS) proposed by the 2013 ACC/AHA Guideline on the Treatment of Blood Cholesterol...
February 13, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28225646/conventional-and-zoomit-dwi-for-evaluation-of-testis-in-patients-with-ipsilateral-varicocele
#18
İsmail Okan Yıldırım, Semih Sağlık, Hüseyin Çelik
OBJECTIVE: The current study aimed to investigate the effects of varicocele on testis parenchyma by using ZOOMit DWI and conventional DWI and to compare both diffusion methods. SUBJECTS AND METHODS: Forty-five patients with unilateral varicocele diagnosed by physical examination and color Doppler ultrasound between July 2015 and December 2015 and 32 healthy volunteers were included in the study. ZOOMit and conventional DWI were performed for all patients with a 3-T MRI scanner...
February 22, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28225638/laparoscopic-resection-of-pancreatic-tumors-in-children-results-of-a-multicentric-survey
#19
Ciro Esposito, Pascal De Lagausie, Maria Escolino, Amulya Saxena, George W Holcomb, Alessandro Settimi, Francois Becmeur, David van der Zee
AIM: This study aimed to report the results of a multicentric survey about laparoscopic treatment of pancreatic tumors in children. MATERIALS AND METHODS: The data of patients operated using minimally invasive surgery (MIS) for a pancreatic tumor in 5 International centers of Pediatric Surgery in the last 5 years were retrospectively reviewed. We recorded data relating to the clinical presentation, diagnostic evaluation, surgical technique, and outcome. RESULTS: Fifteen patients (average age 2...
February 22, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28225076/when-to-stop-propranolol-for-infantile-hemangioma
#20
Lei Chang, Yifei Gu, Zhang Yu, Hanru Ying, Yajing Qiu, Gang Ma, Hui Chen, Yunbo Jin, Xiaoxi Lin
There is no definitive conclusion regarding the optimal timing for terminating propranolol treatment for infantile hemangioma (IH). A total of 149 patients who underwent detailed color Doppler ultrasound examination were included in this study. The characteristics and propranolol treatment of all patients were summarized and analyzed. Patients were divided into two groups according to the lesion regression rate. Among the 149 patients, 38 were assigned to the complete regression group, and 111 were assigned to the partial regression group...
February 22, 2017: Scientific Reports
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