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https://www.readbyqxmd.com/read/28727658/white-cell-and-marrow-imaging-subtracting-uncertainty
#1
Chelsey Turner, Alison A Bolster, Carolyn L Paterson, Hugh J Wallace
A subtraction method for assessments of dual-isotope indium-111 (In)-labelled white cell and Tc-nanocoll was proposed, and following a pilot study was introduced in routine service to improve the confidence of reporters. This technical note describes a simple technique to produce subtraction images from routinely acquired images to investigate and exclude post joint replacement infection. Labelled leucocytes (with In) show areas of increased white cell accumulation, whereas Tc-nanocoll images show bone marrow distribution...
July 19, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28716512/results-of-the-dubert-procedure-for-chronic-painful-fracture-dislocations-of-the-fifth-carpometacarpal-joint-a-report-of-6-cases
#2
N Meraghni, G Bacle, E Marteau, Y Bouju, J Laulan
Carpometacarpal (CMC) fracture-dislocations of the fifth ray are common. For chronic injuries, Dubert proposed combining resection arthroplasty of the base of the fifth metacarpal (M5) with synostosis with the fourth metacarpal (M4). Our aim was to evaluate the results of this procedure. Between 1994 and 2014, 7 men and 1 woman with an average age of 36 years (range, 27 to 45) were operated on. The right hand was involved in 6 of the 8 cases. All patients had symptomatic osteoarthritis secondary to isolated articular malunion and subluxation of the 5th CMC joint...
July 14, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28669858/pelvic-incidence-a-fixed-value-or-can-you-change-it
#3
Howard M Place, Ann M Hayes, Stephen B Huebner, Andy M Hayden, Heidi Israel, Jennifer L Brechbuhler
BACKGROUND CONTEXT: There has been renewed interest in the pelvic vertebrae by spinal surgeons recently. Those involved in working with patients with adult spinal deformity, focus on the position of the fused spine as it relates to the pelvis, and determine success or failure by specific numbers for given pelvic parameters. The pelvic parameters that are commonly measured for these patients are pelvic tilt, sacral slope, and pelvic incidence. Out of the three, pelvic incidence has always been considered to be the fixed measurement, while pelvic tilt and sacral slope have the capacity to change in relation to external forces...
June 29, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28666884/bioinspired-coupled-helical-coils-for-soft-tissue-engineering-of-tubular-structures-improved-mechanical-behavior-of-tubular-collagen-type-i-templates
#4
H P Janke, J Bohlin, R M L M Lomme, S M Mihaila, J Hilborn, W F J Feitz, E Oosterwijk
The design of constructs for tubular tissue engineering is challenging. Most biomaterials need to be reinforced with supporting structures such as knittings, meshes or electrospun material to comply with the mechanical demands of native tissues. In this study, coupled helical coils (CHCs) were manufactured to mimic collagen fiber orientation as found in nature. Monofilaments of different commercially available biodegradable polymers were wound and subsequently fused, resulting in right-handed and left-handed polymer helices fused together in joints where the filaments cross...
June 27, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28611327/overgrowth-of-costochondral-graft-in-temporomandibular-joint-ankylosis-reconstruction-a-retrospective-study
#5
S M Balaji, Preetha Balaji
BACKGROUND: Temporomandibular joint (TMJ) ankylosis is a situation in which the mandibular condyle is fused to the glenoid fossa by bone or fibrous tissue. The management of TMJ ankylosis has a complicated chore, and it is challenging for the maxillofacial surgeon because of technical hitches and high rate of reankylosis. Costochondral graft (CCG) is a common treatment modality for TMJ ankylosis. One of disadvantages of CCG is unpredictability of growth pattern and risk of overgrowth...
March 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28610254/three-new-macropsini-hemiptera-cicadellidae-leafhopper-species-from-australia
#6
Liyuan Yang, Christopher H Dietrich, Yalin Zhang
Three new species, Macropsella recta, Toropsis minuspina and Varicopsella apecurvata spp. nov. are described and illustrated from Australia.       Leafhoppers of the subfamily Macropsinae are found abundantly in the Holarctic, Oriental and Australian regions (Linnavuori, 1978) and have been collected from around the world, except for Antarctica, Oceania and South America (Hamilton, 1980). Both Hamilton (1980) and Evans (1966) suggested that there were likely a myriad of uncollected and undescribed species in Australia alone and Evans (1971) commented that the Macropsinae are possibly more abundant in Australia than anywhere else in the world...
June 2, 2017: Zootaxa
https://www.readbyqxmd.com/read/28597301/osteoarthritis-and-spontaneous-fusion-of-facet-joints-after-percutaneous-instrumentation-in-thoracolumbar-fractures
#7
Alix Tromme, Yann Philippe Charles, Sébastien Schuller, Axel Walter, Mickaël Schaeffer, Jean-Paul Steib
PURPOSE: This retrospective study determined the rate of osteoarthritis and spontaneous facet joint fusion and analyzed risk factors related to patient characteristics, fracture type or surgical technique on pre- and postoperative CT after percutaneous instrumentation in thoracolumbar fractures. METHODS: 1050 facet joints adjacent to screws in 148 patients (15-85 years) with thoracolumbar fractures were analyzed with an average time between CTs of 12.3 months...
June 9, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28582269/automated-diagnosis-of-prostate-cancer-in-multi-parametric-mri-based-on-multimodal-convolutional-neural-networks
#8
Minh Hung Le, Jingyu Chen, Liang Wang, Zhiwei Wang, Wenyu Liu, Kwang-Ting Tim Cheng, Xin Yang
Automated methods for prostate cancer (PCa) diagnosis in multi-parametric magnetic resonance images (MP-MRI) are critical for increasing the survival rate of patients and alleviating requirements in radiology reading and reducing risk of over-/under-treatment. This paper presents an automated method based on multimodal convolutional neural networks (CNNs) for two PCa diagnosis tasks: 1) distinguishing between cancer and noncancerous tissues, 2) distinguishing between clinically significant (CS) and indolent PCa...
June 5, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28560871/forecasting-chronic-diseases-using-data-fusion
#9
Evrim Acar, Gözde Gürdeniz, Francesco Savorani, Louise Hansen, Anja Olsen, Anne Tjønneland, Lars Ove Dragsted, Rasmus Bro
Data fusion, that is, extracting information through the fusion of complementary data sets, is a topic of great interest in metabolomics because analytical platforms such as liquid chromatography-mass spectrometry (LC-MS) and nuclear magnetic resonance (NMR) spectroscopy commonly used for chemical profiling of biofluids provide complementary information. In this study, with a goal of forecasting acute coronary syndrome (ACS), breast cancer, and colon cancer, we jointly analyzed LC-MS, NMR measurements of plasma samples, and the metadata corresponding to the lifestyle of participants...
June 9, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28553387/case-of-atlantoaxial-dislocation-with-assimilated-c1-absent-posterior-c2-butterfly-c3-and-fused-subaxial-cervical-spine-management-dilemma-with-multiple-segmentation-and-formation-defects
#10
Arsikere N Deepak, Pravin Salunke, Rajeev P Kamble
Segmentation defects are often seen with congenital atlantoaxial dislocation (AAD) though an associated absence of posterior arch of C2 and butterfly C3 is rare. Apart from rarity, the combination of formation and segmentation defects adds to the management dilemma. We report a case of AAD with assimilated atlas, absent C2 posterior arch, C3 butterfly vertebra with floating posterior elements, and fused C4-C6. The child was managed by C1-C2 fusion alone with immediate symptomatic improvement. The presence of formation defects such as adjacent butterfly vertebra and absent posterior elements does not alter the management of AAD...
January 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28552666/effects-of-force-detecting-sense-organs-on-muscle-synergies-are-correlated-with-their-response-properties
#11
Sasha N Zill, David Neff, Sumaiya Chaudhry, Annelie Exter, Josef Schmitz, Ansgar Büschges
Sense organs that monitor forces in legs can contribute to activation of muscles as synergist groups. Previous studies in cockroaches and stick insects showed that campaniform sensilla, receptors that encode forces via exoskeletal strains, enhance muscle synergies in substrate grip. However synergist activation was mediated by different groups of receptors in cockroaches (trochanteral sensilla) and stick insects (femoral sensilla). The factors underlying the differential effects are unclear as the responses of femoral campaniform sensilla have not previously been characterized...
May 25, 2017: Arthropod Structure & Development
https://www.readbyqxmd.com/read/28493649/temperature-driven-planar-chirality-switching-of-a-pillar-5-arene-based-molecular-universal-joint
#12
Jiabin Yao, Wanhua Wu, Wenting Liang, Yujun Feng, Dayang Zhou, Jason J Chruma, Gaku Fukuhara, Tadashi Mori, Yoshihisa Inoue, Cheng Yang
The study of an enantiopure bicyclic pillar[5]arene-based molecular universal joint (MUJ) by single-crystal X-ray diffraction allowed for the first time the unequivocal assignment of the absolute configuration of a planar chiral pillar[5]arene by circular dichroism spectroscopy. Crucially, the absolute configuration of the MUJ was switched reversibly by temperature, with an accompanying sign inversion of the anisotropy factor that varied by as much as 0.03, which is the largest value ever reported. Mechanistically, the reversible chirality switching of the MUJ is driven by the threading/dethreading motion of the fused ring and hence is dependent on both the size and nature of the ring and the solvent employed, reflecting the critical balance between the self-complexation of the ring by pillar[5]arene, the solvation to the excluded ring, and the inclusion of solvent molecules in the cavity...
May 11, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28480581/automatic-quantification-of-bone-marrow-edema-on-mri-of-the-wrist-in-patients-with-early-arthritis-a-feasibility-study
#13
Evgeni Aizenberg, Edgar A H Roex, Wouter P Nieuwenhuis, Lukas Mangnus, Annette H M van der Helm-van Mil, Monique Reijnierse, Johan L Bloem, Boudewijn P F Lelieveldt, Berend C Stoel
PURPOSE: To investigate the feasibility of automatic quantification of bone marrow edema (BME) on MRI of the wrist in patients with early arthritis. METHODS: For 485 early arthritis patients (clinically confirmed arthritis of one or more joints, symptoms for less than 2 years), MR scans of the wrist were processed in three automatic stages. First, super-resolution reconstruction was applied to fuse coronal and axial scans into a single high-resolution 3D image. Next, the carpal bones were located and delineated using atlas-based segmentation...
May 7, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28463696/spinal-fusion-without-instrumentation-experimental-animal-study
#14
Sandra Reitmaier, Julian Schuelke, Hendrik Schmidt, David Volkheimer, Anita Ignatius, Hans-Joachim Wilke
BACKGROUND: The number and cost of instrumented spinal fusion surgeries have increased rapidly, primarily for the treatment of lumbar segmental instabilities. However, what if the organism itself is able to restore segmental stability over time? This large-animal study using sheep aimed to investigate whether the reparative response after destabilization via facetectomy and nucleotomy without instrumentation can effectively fuse the spinal segment comparable to instrumented standard fusion surgery...
April 25, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28427313/sensitivity-of-a-juvenile-subject-specific-musculoskeletal-model-of-the-ankle-joint-to-the-variability-of-operator-dependent-input
#15
Iain Hannah, Erica Montefiori, Luca Modenese, Joe Prinold, Marco Viceconti, Claudia Mazzà
Subject-specific musculoskeletal modelling is especially useful in the study of juvenile and pathological subjects. However, such methodologies typically require a human operator to identify key landmarks from medical imaging data and are thus affected by unavoidable variability in the parameters defined and subsequent model predictions. The aim of this study was to thus quantify the inter- and intra-operator repeatability of a subject-specific modelling methodology developed for the analysis of subjects with juvenile idiopathic arthritis...
May 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28425949/an-efficient-distributed-compressed-sensing-algorithm-for-decentralized-sensor-network
#16
Jing Liu, Kaiyu Huang, Guoxian Zhang
We consider the joint sparsity Model 1 (JSM-1) in a decentralized scenario, where a number of sensors are connected through a network and there is no fusion center. A novel algorithm, named distributed compact sensing matrix pursuit (DCSMP), is proposed to exploit the computational and communication capabilities of the sensor nodes. In contrast to the conventional distributed compressed sensing algorithms adopting a random sensing matrix, the proposed algorithm focuses on the deterministic sensing matrices built directly on the real acquisition systems...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28379170/a-two-axis-goniometric-sensor-for-tracking-finger-motion
#17
Lefan Wang, Turgut Meydan, Paul Ieuan Williams
The study of finger kinematics has developed into an important research area. Various hand tracking systems are currently available; however, they all have limited functionality. Generally, the most commonly adopted sensors are limited to measurements with one degree of freedom, i.e., flexion/extension of fingers. More advanced measurements including finger abduction, adduction, and circumduction are much more difficult to achieve. To overcome these limitations, we propose a two-axis 3D printed optical sensor with a compact configuration for tracking finger motion...
April 5, 2017: Sensors
https://www.readbyqxmd.com/read/28371783/monocular-vision-and-imu-based-system-for-prosthesis-pose-estimation-during-total-hip-replacement-surgery
#18
Shaojie Su, Yixin Zhou, Zhihua Wang, Hong Chen
The average age of population increases worldwide, so does the number of total hip replacement surgeries. Total hip replacement, however, often involves a risk of dislocation and prosthetic impingement. To minimize the risk after surgery, we propose an instrumented hip prosthesis that estimates the relative pose between prostheses intraoperatively and ensures the placement of prostheses within a safe zone. We create a model of the hip prosthesis as a ball and socket joint, which has four degrees of freedom (DOFs), including 3-DOF rotation and 1-DOF translation...
June 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28349181/hip-fusion-takedown-to-a-total-hip-arthroplasty-is-it-worth-it-a-systematic-review
#19
Julio J Jauregui, Joseph K Kim, William P Shield, Matthew Harb, Emmanuel M Illical, Farshad Adib, Aditya V Maheshwari
INTRODUCTION: Patients with surgically or spontaneously fused hips are often dissatisfied with their overall function and the debilitating effect on adjacent joints. Therefore, in properly selected patients, hip fusion-takedown and conversion to total hip arthroplasty (THA) can result in improved function and decreased pain. We aimed to (1) evaluate the indications for conversion, (2) evaluate the clinical outcomes, (3) analyze the overall complications, and (4) identify the overall satisfaction following the procedure...
March 27, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28328603/simultaneous-autologus-mandible-and-temporomandibular-joint-reconstruction
#20
Yigit Ozer Tiftikcioglu, Ersin Gur, Ufuk Bilkay
Ablative surgery of mandible often necessitates combined reconstruction of the mandible and the temporomandibular joint. Fibula-free flaps with gap arthroplasty or osseochondral grafts are common procedures in the authors' practice. In search for a better reconstructive option free fibula flap is used together with a metatarsal bone flap for the vascular reconstruction of the mandibular body and the condyle at the same time. The 2 osseous-free flaps have been fused and used as a combined flow through double-free flap...
June 2017: Journal of Craniofacial Surgery
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