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soft tissue reconstruction

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https://www.readbyqxmd.com/read/28102942/a-platform-independent-method-to-reduce-ct-truncation-artifacts-using-discriminative-dictionary-representations
#1
Yang Chen, Adam Budde, Ke Li, Yinsheng Li, Jiang Hsieh, Guang-Hong Chen
PURPOSE: When the scan field of view (SFOV) of a CT system is not large enough to enclose the entire cross-section of the patient, or the patient needs to be positioned partially outside the SFOV for certain clinical applications, truncation artifacts often appear in the reconstructed CT images. Many truncation artifact correction methods perform extrapolations of the truncated projection data based on certain a priori assumptions. The purpose of this work was to develop a novel CT truncation artifact reduction method that directly operates on DICOM images...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28101431/non-invasive-terahertz-imaging-of-tissue-water-content-for-flap-viability-assessment
#2
Neha Bajwa, Joshua Au, Reza Jarrahy, Shijun Sung, Michael C Fishbein, David Riopelle, Daniel B Ennis, Tara Aghaloo, Maie A St John, Warren S Grundfest, Zachary D Taylor
Accurate and early prediction of tissue viability is the most significant determinant of tissue flap survival in reconstructive surgery. Perturbation in tissue water content (TWC) is a generic component of the tissue response to such surgeries, and, therefore, may be an important diagnostic target for assessing the extent of flap viability in vivo. We have previously shown that reflective terahertz (THz) imaging, a non-ionizing technique, can generate spatially resolved maps of TWC in superficial soft tissues, such as cornea and wounds, on the order of minutes...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28099269/bilateral-leg-replantation-in-a-3-month-old-baby-after-a-knee-level-crush-amputation-a-2-year-follow-up
#3
Kresimir Bulic, Anko Antabak, Anto Dujmovic, Hrvoje Kisic, Mia Lorencin
We present a case of a successful bilateral leg replantation in a 3-month-old baby after a knee-level crush amputation with the loss of both knee joints. The legs were replanted after 4 hours of warm and an additional 2.5 and 3.5 hours of cold ischemia time. Both legs show motor and sensory reinnervation, without additional procedures performed on the right leg, and after a nerve reconstruction with cadaveric allografts on the left leg. Both replanted legs exhibit excellent bony and soft tissue growth. Two years after the injury, the patient is progressing well with rehabilitation, with favourable odds of having knee reconstructions performed at a later age...
January 18, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28096323/pyoderma-gangrenosum-following-complex-reconstruction-of-a-large-scale-lower-limb-defect-by-combined-parascapular-and-latissimus-dorsi-flap
#4
Tomke Cordts, Amir K Bigdeli, Leila Harhaus, Christoph Hirche, Thomas Kremer, Ulrich Kneser, Volker J Schmidt
A female patient with a critical soft tissue defect after elective knee replacement surgery was transferred to our department for reconstruction. As wounds were rapidly progressing, necrotizing fasciitis was initially suspected but eventually ruled out by histopathological analysis. A 50 × 15 cm defect was then reconstructed by means of a combined Parascapular and latissimus dorsi flap before, a couple days later, the patient developed tender pustules and ulcers involving the flap as well as the donor site...
January 17, 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28095919/ancient-bacteria-of-the-%C3%A3-tzi-s-microbiome-a-genomic-tale-from-the-copper-age
#5
Gabriele Andrea Lugli, Christian Milani, Leonardo Mancabelli, Francesca Turroni, Chiara Ferrario, Sabrina Duranti, Douwe van Sinderen, Marco Ventura
BACKGROUND: Ancient microbiota information represents an important resource to evaluate bacterial evolution and to explore the biological spread of infectious diseases in history. The soft tissue of frozen mummified humans, such as the Tyrolean Iceman, has been shown to contain bacterial DNA that is suitable for population profiling of the prehistoric bacteria that colonized such ancient human hosts. RESULTS: Here, we performed a microbial cataloging of the distal gut microbiota of the Tyrolean Iceman, which highlights a predominant abundance of Clostridium and Pseudomonas species...
January 17, 2017: Microbiome
https://www.readbyqxmd.com/read/28095486/three-dimensional-assessment-of-temporomandibular-joint-using-mri-cbct-image-registration
#6
Mohammed A Q Al-Saleh, Kumaradevan Punithakumar, Manuel Lagravere, Pierre Boulanger, Jacob L Jaremko, Paul W Major
PURPOSE: To introduce a new approach to reconstruct a 3D model of the TMJ using magnetic resonance imaging (MRI) and cone-beam computed tomography (CBCT) registered images, and to evaluate the intra-examiner reproducibility values of reconstructing the 3D models of the TMJ. METHODS: MRI and CBCT images of five patients (10 TMJs) were obtained. Multiple MRIs and CBCT images were registered using a mutual information based algorithm. The articular disc, condylar head and glenoid fossa were segmented at two different occasions, at least one-week apart, by one investigator, and 3D models were reconstructed...
2017: PloS One
https://www.readbyqxmd.com/read/28090003/primary-hinged-external-fixation-of-terrible-triad-injuries-and-olecranon-fracture-dislocations-of-the-elbow
#7
Kensuke Sakai, Masahiro Shirahama, Naoto Shiba, Kenji Yoshida, Shiro Yoshida
This study aimed to introduce a new treatment that apples primary hinged external fixation for complex fracture-dislocations of the elbow in 12 cases. We retrospectively assessed the functional outcomes of eight patients with terrible triad injuries and three patients with an olecranon fracture-dislocation of the elbow, who were treated at our hospital using a primary hinged external fixator between June 2012 and December 2014. Ten patients underwent repair or replacement of the radial head, while three underwent repair of the olecranon...
January 16, 2017: Kurume Medical Journal
https://www.readbyqxmd.com/read/28089191/object-shape-dependency-of-in-plane-resolution-for-iterative-reconstruction-of-computed-tomography
#8
Tadanori Takata, Katsuhiro Ichikawa, Wataru Mitsui, Hiroyuki Hayashi, Kaori Minehiro, Keita Sakuta, Haruka Nunome, Kousuke Matsubara, Hiroki Kawashima, Yukihiro Matsuura, Toshifumi Gabata
The present study aimed to investigate whether the in-plane resolution property of iterative reconstruction (IR) of computed tomography (CT) data is object shape-dependent by testing columnar shapes with diameters of 3, 7, and 10cm (circular edge method) and a cubic shape with 5-cm side lengths (linear edge method). For each shape, objects were constructed of acrylic (contrast in Hounsfield units [ΔHU]=120) as well as a soft tissue equivalent material (ΔHU=50). For each shape, we measured the modulation transfer functions (MTFs) of IR and filtered back projection (FBP) using two multi-slice CT scanners at scan doses of 5 and 10mGy...
January 11, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28089162/the-abductor-pollicis-longus-tendon-as-an-alternative-graft-in-hand-surgery
#9
REVIEW
Samuel Rosas, Carolina Mesa, Felipe Mesa
Initial treatment of damaged tendons after soft tissue trauma of the hand can be performed with primary tendon reconstruction or with tendon grafts if indicated. The most frequently used tendons are from the palmaris longus and plantaris muscles. Nonetheless, these muscles may not be present or their anatomic characteristics might not suitable for reconstructive procedures. Here, we present an alternative surgical technique for tendon reconstruction of the hand using abductor pollicis longus accessory tendons as grafts...
January 11, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28088375/two-stage-management-of-cierny-mader-type-iv-chronic-osteomyelitis-of-the-long-bones
#10
Hongri Wu, Jie Shen, Xin Yu, Jingshu Fu, Shengpeng Yu, Dong Sun, Zhao Xie
INTRODUCTION: Cierny-Mader (C-M) type IV chronic osteomyelitis represents a complex clinical challenge with permeation of extensive bone and soft tissue involvement. Aggressive debridement through viable tissue margin includes en bloc resection improves the odds of eradication of infection, which creates large bone and soft tissue loss in treating this type of osteomyelitis. The potentially large defects increase reconstruction problems with traditional reconstruction technique. The newly staged induced membrane technique presents length-independent, potential as an alternative reconstruction method for segmental bone defects due to type IV chronic osteomyelitis...
January 6, 2017: Injury
https://www.readbyqxmd.com/read/28086945/complete-deltoid-resection-in-early-childhood-without-muscle-transfer-results-in-normal-shoulder-function-at-long-term-follow-up-a-case-report
#11
Annie Arteau, Franziska Seeli, Bruno Fuchs
BACKGROUND: Musculoskeletal tumors involving the deltoid muscle and necessitating its complete resection are rare. The function after complete deltoid resection is reported to be limited, and several authors consider muscle transfer to improve shoulder motion. However, it still remains unclear whether such transfer adds function. To the best of our knowledge, all reports on complete deltoid resection refer to adult patients, and it is unknown what function results after deltoid resection in childhood...
January 14, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28077871/hyoliths-are-palaeozoic-lophophorates
#12
Joseph Moysiuk, Martin R Smith, Jean-Bernard Caron
Hyoliths are abundant and globally distributed 'shelly' fossils that appear early in the Cambrian period and can be found throughout the 280 million year span of Palaeozoic strata. The ecological and evolutionary importance of this group has remained unresolved, largely because of their poorly constrained soft anatomy and idiosyncratic scleritome, which comprises an operculum, a conical shell and, in some taxa, a pair of lateral spines (helens). Since their first description over 175 years ago, hyoliths have most often been regarded as incertae sedis, related to molluscs or assigned to their own phylum...
January 19, 2017: Nature
https://www.readbyqxmd.com/read/28070628/osseointegrated-prosthetic-limb-for-the-treatment-of-lower-limb-amputations-experience-and-outcomes
#13
Munjed Al Muderis, William Lu, Jiao Jiao Li
BACKGROUND: Osseointegration has emerged over the past two decades as a dramatically different approach for the treatment of lower limb amputations, which involves direct attachment of the prosthesis to the skeletal residuum. This approach can address many of the socket-interface issues associated with socket prostheses which represent the current standard of care for amputees. The Osseointegrated Prosthetic Limb (OPL) is an osseointegration implant with a new design and improved features compared to other available implant systems...
January 9, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28068159/suspensory-versus-aperture-fixation-of-a-quadrupled-hamstring-tendon-autograft-in-anterior-cruciate-ligament-reconstruction
#14
William M Browning, Melissa A Kluczynski, Christian Curatolo, John M Marzo
BACKGROUND: Hamstring grafts have become a popular choice for anterior cruciate ligament (ACL) reconstruction; however, the most effective means of fixation of these soft tissue grafts is unknown. PURPOSE: To determine whether suspensory or aperture fixation of hamstring tendon autografts provides better stability and clinical outcomes in ACL reconstruction. STUDY DESIGN: Meta-analysis. METHODS: A literature search of studies reporting single-bundle ACL reconstructions using 4-stranded hamstring tendon autografts with aperture or suspensory fixation with a minimum 24-month follow-up was conducted...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28065957/the-effect-of-educational-internships-on-medical-students-perceptions-of-plastic-surgery
#15
Andac Aykan, Engin Kurt, Sedat Avsar, Muhitdin Eski, Serdar Ozturk
OBJECTIVE: To investigate the effects of plastic, reconstructive and aesthetic surgery educational internships on medical students' perceptions of the scope of plastic surgery. METHODS: This cross-sectional study was conducted at the Gulhane Medical Faculty, Ankara, Turkey, from 2012 to 2013, and comprised 4th-, 5th- and 6th-year medical students. Students were given a questionnaire consisting of 28 questions related to maxillofacial and upper and lower extremity medical conditions, and skin, aesthetic and congenital anomalies...
January 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28065638/iterative-metal-artefact-reduction-in-ct-can-dedicated-algorithms-improve-image-quality-after-spinal-instrumentation
#16
J Aissa, C Thomas, L M Sawicki, J Caspers, P Kröpil, G Antoch, J Boos
AIM: To investigate the value of dedicated computed tomography (CT) iterative metal artefact reduction (iMAR) algorithms in patients after spinal instrumentation. MATERIALS AND METHODS: Post-surgical spinal CT images of 24 patients performed between March 2015 and July 2016 were retrospectively included. Images were reconstructed with standard weighted filtered back projection (WFBP) and with two dedicated iMAR algorithms (iMAR-Algo1, adjusted to spinal instrumentations and iMAR-Algo2, adjusted to large metallic hip implants) using a medium smooth kernel (B30f) and a sharp kernel (B70f)...
January 5, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28063278/combined-anterolateral-thigh-and-tensor-fasciae-latae-flaps-an-option-for-reconstruction-of-large-head-and-neck-defects
#17
Ramzey Tursun, Hisham Marwan, J Marshall Green, Fawaz Alotaibi, Andre LeDoux
PURPOSE: The advent of microvascular free tissue transfer has provided the reconstructive surgeon with an enormous array of treatment options for reconstruction of large head and neck defects. However, when indicated by defect size, the need for more than 1 flap not only increases surgical complexity but also patient morbidity. The combination of the anterolateral thigh (ALT) flap and the tensor fascia latae (TFL) flap can be used to reconstruct such complex head and neck defects, thereby minimizing any additional morbidity that would be imposed by an additional flap harvest site...
December 26, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28061849/do-size-shape-and-alignment-parameters-of-the-femoral-condyle-affect-the-trochlear-groove-tracking-a-morphometric-study-based-on-3d-computed-tomography-models-in-chinese-people
#18
Zhe Du, Shichang Chen, Mengning Yan, Bing Yue, Yiming Zeng, You Wang
BACKGROUND: Our study aimed to investigate whether geometrical features (size, shape, or alignment parameters) of the femoral condyle affect the morphology of the trochlear groove. METHODS: Computed tomography models of 195 femurs (97 and 98 knees from male and female subjects, respectively) were reconstructed into three-dimensional models and categorised into four types of trochlear groove morphology based on the position of the turning point in relation to the mechanical axis (types 45°, 60°, 75°, and 90°)...
January 6, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28060999/statistical-image-domain-multi-material-decomposition-for-dual-energy-ct
#19
Yi Xue, Ruoshui Ruan, Xiuhua Hu, Yu Kuang, Jing Wang, Yong Long, Tianye Niu
PURPOSE: Dual-energy CT (DECT) enhances tissue characterization because of its basis material decomposition capability. In addition to conventional two-material decomposition from DECT measurements, multi-material decomposition (MMD) is required in many clinical applications. To solve the ill-posed problem of reconstructing multiple-material images from dual-energy measurements, additional constraints are incorporated into the formulation, including volume and mass conservation and the assumptions that at most three materials in each pixel and various material types among pixels...
January 6, 2017: Medical Physics
https://www.readbyqxmd.com/read/28060917/a-novel-mouse-segmentation-method-based-on-dynamic-contrast-enhanced-micro-ct-images
#20
Dongmei Yan, Zhihong Zhang, Qingming Luo, Xiaoquan Yang
With the development of hybrid imaging scanners, micro-CT is widely used in locating abnormalities, studying drug metabolism, and providing structural priors to aid image reconstruction in functional imaging. Due to the low contrast of soft tissues, segmentation of soft tissue organs from mouse micro-CT images is a challenging problem. In this paper, we propose a mouse segmentation scheme based on dynamic contrast enhanced micro-CT images. With a homemade fast scanning micro-CT scanner, dynamic contrast enhanced images were acquired before and after injection of non-ionic iodinated contrast agents (iohexol)...
2017: PloS One
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