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https://www.readbyqxmd.com/read/29221269/cluster-analysis-of-acute-ascending-aortic-dissection-provides-novel-insight-into-mechanisms-of-distal-progression
#1
Jennifer L Philip, Nilto C De Oliveira, Shahab A Akhter, Brooks L Rademacher, Christopher B Goodavish, Paul D DiMusto, Paul C Tang
Background: Whether primary tear size impacts extent of type A dissection is unclear. Using statistical groupings based on dissection morphology, we examined its relationship to primary tear area. Methods: We retrospectively reviewed 108 patients who underwent acute ascending dissection repair from 2000-2016. Dissection morphology was characterized using 3-dimensional (3D) reconstructions of computed tomography (CT) scan images. Two-step cluster analysis was performed to group the dissections by examining the true lumen area as a fraction of the total aortic area at various levels...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29219029/determination-of-stent-frame-displacement-after-endovascular-aneurysm-sealing
#2
Ruben van Veen, Kim van Noort, Richte C L Schuurmann, Jan Wille, Cornelis H Slump, Jean-Paul P M de Vries
PURPOSE: To describe and validate a new methodology for visualizing and quantifying 3-dimensional (3D) displacement of the stent frames of the Nellix endosystem after endovascular aneurysm sealing (EVAS). METHODS: The 3D positions of the stent frames were registered to 5 fixed anatomical landmarks on the post-EVAS computed tomography (CT) scans, facilitating comparison of the position and shape of the stent frames between consecutive follow-up scans. Displacement of the proximal and distal ends of the stent frames, the entire stent frame trajectories, as well as changes in distance between the stent frames were determined for 6 patients with >5-mm displacement and 6 patients with <5-mm displacement at 1-year follow-up...
December 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/29215821/a-fast-3-dimensional-magnetic-resonance-imaging-reconstruction-for-surgical-planning-of-uterine-myomectomy
#3
Sa Ra Lee, Young Jae Kim, Kwang Gi Kim
BACKGROUND: Uterine myoma is the most common benign gynecologic tumor in reproductive-aged women. During myomectomy for women who want to preserve fertility, it is advisable to detect and remove all myomas to decrease the risk of additional surgery. However, finding myomas during surgery is often challenging, especially for deep-seated myomas. Therefore, three-dimensional (3D) preoperative localization of myomas can be helpful for the surgical planning for myomectomy. However, the previously reported manual 3D segmenting method takes too much time and effort for clinical use...
January 8, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29215451/mandibular-reconstruction-using-a-customized-three-dimensional-titanium-implant-applied-on-the-lingual-surface-of-the-mandible
#4
You-Young Jo, Seong-Gon Kim, Min-Keun Kim, Sung-Ho Shin, Janghoon Ahn, Hyun Seok
A patient had a right mandibular defect due to resection of an ameloblastoma. Previously, the defect had been reconstructed by an iliac bone graft, and subsequently, a titanium mesh with xenograft was used. However, it was not successfully reconstructed. For the recovery of mandible continuity and rehabilitation of jaw movement, we manufactured a customized 3-dimensional titanium implant by computer-aided design and manufacturing and electron beam melting technology. This implant was designed to have a porous body structure and lingual plate...
December 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29209176/central-projections-of-antennal-and-labial-palp-sensory-neurons-in-the-migratory-armyworm-mythimna-separata
#5
Bai-Wei Ma, Xin-Cheng Zhao, Bente G Berg, Gui-Ying Xie, Qing-Bo Tang, Gui-Rong Wang
The oriental armyworm, Mythimna separata (Walker), is a polyphagous, migratory pest relying on olfactory cues to find mates, locate nectar, and guide long-distance flight behavior. In the present study, a combination of neuroanatomical techniques were utilized on this species, including backfills, confocal microscopy, and three-dimensional reconstructions, to trace the central projections of sensory neurons from the antenna and the labial pit organ, respectively. As previously shown, the axons of the labial sensory neurons project via the ipsilateral labial nerve and terminate in three main areas of the central nervous system: (1) the labial-palp pit organ glomerulus of each antennal lobe, (2) the gnathal ganglion, and (3) the prothoracic ganglion of the ventral nerve cord...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29204499/variance-in-predicted-cup-size-by-2-dimensional-vs-3-dimensional-computerized-tomography-based-templating-in-primary-total-hip%C3%A2-arthroplasty
#6
Feroz A Osmani, Savyasachi Thakkar, Austin Ramme, Ameer Elbuluk, Paul Wojack, Jonathan M Vigdorchik
Background: Preoperative total hip arthroplasty templating can be performed with radiographs using acetate prints, digital viewing software, or with computed tomography (CT) images. Our hypothesis is that 3D templating is more precise and accurate with cup size prediction as compared to 2D templating with acetate prints and digital templating software. Methods: Data collected from 45 patients undergoing robotic-assisted total hip arthroplasty compared cup sizes templated on acetate prints and OrthoView software to MAKOplasty software that uses CT scan...
December 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/29203379/arthroscopic-reconstruction-of-the-ligamentum-teres-a-guide-to-safe-tunnel-placement
#7
Alex W Brady, Jorge Chahla, Renato Locks, Jacob D Mikula, Erik L Slette, Robert F LaPrade, Marc J Philippon
PURPOSE: To provide a quantitative guide to tunnel placement concurrently through the femur and acetabulum during a ligamentum teres reconstruction, minimizing the risk of injury to the obturator neurovascular bundle. METHODS: Nine human cadaveric pelvises, complete with femurs (mean age, 59.6 years; age range, 47-65 years), were studied. Before dissection, a 3-dimensional coordinate-measuring device was used to record the neutral orientation of the femur in the acetabulum...
December 1, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29201927/radiographic-location-does-not-ensure-a-precise-anatomic-location-of-the-femoral-fixation-site-in-medial-patellofemoral-ligament-reconstruction
#8
Vicente Sanchis-Alfonso, Cristina Ramírez-Fuentes, Erik Montesinos-Berry, Isabel Elía, Luis Martí-Bonmatí
Background: A frequently used method to determine the anatomic femoral fixation point in the operating room during medial patellofemoral ligament (MPFL) reconstruction is the radiographic method. However, the ability of this radiological method to establish an anatomic femoral attachment point might not be as accurate as expected. Purpose: (1) To evaluate the accuracy of the radiological method to locate the anatomic femoral fixation point in MPFL reconstruction surgery and (2) to determine the factors influencing the predictability of this method to obtain this objective...
November 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29200176/anatomical-study-of-a-novel-iliosacral-screw-placement-for-sacrum-pelvis-in-adult-via-computed-tomography-reconstruction
#9
Xu Sun, Song Li, Yong Qiu, Zhonghui Chen, Xi Chen, Liang Xu, Zezhang Zhu
STUDY DESIGN: This is a cross-sectional study. OBJECTIVE: To investigate the feasibility and safety of a novel iliosacral screw placement for sacrum-pelvis in adult pelvis by computed tomography (CT) reconstruction. SUMMARY OF BACKGROUND DATA: The optimal technique of spino-pelvic fixation is still being developed and redefined. However, neither the relevant anatomic parameters nor the potential spinal canal involvement for a novel iliosacral screw placement have been clearly analyzed...
December 1, 2017: Spine
https://www.readbyqxmd.com/read/29198939/three-dimensional-computed-tomography-measurement-accuracy-of-varying-hill-sachs-lesion-size
#10
Anthony Ho, Michael D Kurdziel, Denise M Koueiter, J Michael Wiater
BACKGROUND: The glenoid track concept has been proposed to correlate shoulder stability with bone loss. Accurate assessment of Hill-Sachs lesion size preoperatively may affect surgical planning and postoperative outcomes; however, no measurement method has been universally accepted. This study aimed to assess the accuracy and reliability of measuring Hill-Sachs lesion sizes using 3-dimensional (3D) computed tomography (CT). METHODS: Nine polyurethane humerus bone substitutes were used to create Hill-Sachs lesions of varying sizes with a combination of lesion depth (shallow, intermediate, and deep) and width (small, medium, and large)...
November 30, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29198389/cumulative-dose-of-radiation-therapy-of-hepatocellular-carcinoma-patients-and-its-deterministic-relation-to-radiation-induced-liver-disease
#11
Pu Huang, Gang Yu, Daniel S Kapp, Xue-Feng Bian, Chang-Sheng Ma, Hong-Sheng Li, Jin-Hu Chen, Yue-Qiang Liang, Yang Zhang, Shao-Hua Qin, Yao-Qin Xie, Yong Yang, Yong Yin, Lei Xing, Deng-Wang Li
This study aimed to investigate the relationship between dose and radiation-induced liver disease (RILD) in patients with hepatocellular carcinoma (HCC) receiving 3-dimensional conformal radiotherapy (3DCRT). Twenty-three patients with HCC who received conventional fractionated 3DCRT, including 7 who were diagnosed with classic RILD, were enrolled in this retrospective investigation. Cone-beam computed tomography (CBCT) scans were acquired at the time of treatment for each patient. The beams from each patient's treatment plan were applied to each pretreatment CBCT (the modified CBCT or mCBCT) to construct the delivered dose distribution of the day considering inter-treatment anatomy changes...
November 29, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29198142/comparison-of-intercuneiform-1-2-joint-mobility-between-hallux-valgus-and-normal-feet-using-weightbearing-computed-tomography-and-3-dimensional-analysis
#12
Tadashi Kimura, Makoto Kubota, Naoki Suzuki, Asaki Hattori, Keishi Marumo
BACKGROUND: An association has been reported between hallux valgus and hypermobility of the first ray, but subluxation of the intercuneiform 1-2 joint was also suspected in some cases. However, dynamics of the intercuneiform 1-2 joint has seldom been investigated. This study used weightbearing computed tomography (CT) and a 3-dimensional (3D) analysis system to evaluate displacement of the intercuneiform 1-2 joint, intercuneiform 2-3 joint, and second cuneonavicular joint due to weightbearing in hallux valgus and normal feet...
December 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29194275/preoperative-exposure-of-sigmoid-sinus-trajectory-in-posterolateral-cranial-base-approaches-using-a-new-landmark-through-a-neurosurgical-perspective
#13
Ihsan Doğan, Onur Özgüral, Ümit Eroğlu, Eyyub S M Al-Beyati, Cemil M Kilinç, Ayhan Cömert, Hasan Çağlar Uğur
The location of burr holes in posterolateral cranial base approaches should be appropriate to provide an adequate operative field, and surgical freedom is crucial for bone window opening. The aim of this study was to search for more convenient and easily detectable landmarks in comparison with current landmarks in posterolateral cranial base surgery. Twenty 3-dimensional reconstructed head and neck computed tomography angiography images (group 1) and 20 cadaver heads (group 2) were evaluated. An imaginary line connecting the angle of the mandible and the mastoid tip was extended upward...
November 20, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29193888/associations-between-slower-walking-speed-and-t1%C3%AF-magnetic-resonance-imaging-of-femoral-cartilage-following-anterior-cruciate-ligament-reconstruction
#14
Steven Pfeiffer, Matthew S Harkey, Laura E Stanley, J Troy Blackburn, Darin A Padua, Jeffrey T Spang, Stephen W Marshall, Joanne M Jordan, Randy Schmitz, Daniel Nissman, Brian Pietrosimone
To determine if walking speed collected at 6 and 12 months following anterior cruciate ligament reconstruction (ACLR) associates with inter-limb differences in proteoglycan density, measured via T1ρ magnetic resonance imaging (MRI), in tibiofemoral articular cartilage 12 months following ACLR METHODS: Twenty-one individuals with a unilateral patellar-tendon autograft ACLR (10 females, 11 males, 23.9±2.7 years, 23.9±2.7 BMI) were recruited for participation in this study. Walking speed was collected using 3-dimensional motion capture at 6 and 12 months following ACLR...
November 28, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/29191526/clinical-application-of-an-open-source-3d-volume-rendering-software-to-neurosurgical-approaches
#15
Bruno Fernandes de Oliveira Santos, Marcos Devanir Silva da Costa, Ricardo Silva Centeno, Sergio Cavalheiro, Manoel Antônio de Paiva Neto, Michael T Lawton, Feres Chaddad-Neto
OBJECTIVE: Preoperative recognition of the anatomic individualities of each patient can help in achieving more precise and less invasive approaches. Moreover, this may help with anticipating potential complications and intraoperative difficulties. To describe the use, accuracy, and precision of a free tool for planning microsurgical approaches using three-dimensional reconstructions from magnetic resonance images. METHODS: We used the 3D Volume Rendering tool of an open source and free software program for three-dimensional reconstruction of images of surgical sites obtained by MRI volumetric acquisitions...
November 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29187655/-imaging-measurement-and-clinical-significance-of-the-angle-between-the-axis-of-pedicle-and-the-plane-of-lamina-in-lower-cervical-vertebra
#16
Zhenghao Lu, Jinghua Zhou, Weiguo Wang
To explore the imaging measurement and clinical significance of the angle between the axis of pedicle and the plane of lamina in lower cervical vertebra.
 Methods: Three dimensional reconstruction of CT scan was performed in 30 patients with cervical deformity, and the angle between the axis of pedicle and the plane of lamina was measured with the specific reconstructed CT image of C3-C7.
 Results: 1) The left and right transverse angle of C3-C7 between the axis of pedicle and the ipsilateral plane of lamina were 98...
November 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29185807/icon-mic-implementing-a-cpu-mic-collaboration-parallel-framework-for-icon-on-tianhe-2-supercomputer
#17
Zihao Wang, Yu Chen, Jingrong Zhang, Lun Li, Xiaohua Wan, Zhiyong Liu, Fei Sun, Fa Zhang
Electron tomography (ET) is an important technique for studying the three-dimensional structures of the biological ultrastructure. Recently, ET has reached sub-nanometer resolution for investigating the native and conformational dynamics of macromolecular complexes by combining with the sub-tomogram averaging approach. Due to the limited sampling angles, ET reconstruction typically suffers from the "missing wedge" problem. Using a validation procedure, iterative compressed-sensing optimized nonuniform fast Fourier transform (NUFFT) reconstruction (ICON) demonstrates its power in restoring validated missing information for a low-signal-to-noise ratio biological ET dataset...
November 29, 2017: Journal of Computational Biology: a Journal of Computational Molecular Cell Biology
https://www.readbyqxmd.com/read/29185456/tabby-graphene-dimensional-magnetic-crossover-in-fluorinated-graphite
#18
T L Makarova, A L Shelankov, A I Shames, A A Zyrianova, A A Komlev, G N Chekhova, D V Pinakov, L G Bulusheva, A V Okotrub, E Lähderanta
Tabby is a pattern of short irregular stripes, usually related to domestic cats. We have produced Tabby patterns on graphene by attaching fluorine atoms running as monoatomic chains in crystallographic directions. Separated by non-fluorinated sp 2 carbon ribbons, sp 3-hybridized carbon atoms bonded to zigzag fluorine chains produce sp 2-sp 3 interfaces and spin-polarized edge states localized on both sides of the chains. We have compared two kinds of fluorinated graphite samples C2F x , with x near to 1 and x substantially below 1...
November 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29185004/poor-knee-function-after-acl-reconstruction-is-associated-with-attenuated-landing-force-and-knee-flexion-moment-during-running
#19
Luke G Perraton, Michelle Hall, Ross A Clark, Kay M Crossley, Yong-Hao Pua, Tim S Whitehead, Hayden G Morris, Adam G Culvenor, Adam L Bryant
PURPOSE: Poor knee function after anterior cruciate ligament reconstruction (ACLR) may increase the risk of future knee symptoms and knee osteoarthritis via abnormal knee joint loading patterns, particularly during high-impact activity. This study aimed to assess the relationship between poor self-reported or clinically measured knee function and knee moments/vertical ground reaction force (vGRF) in individuals following ACLR. METHODS: 61 participants (mean 16.5 ± 3 months following ACLR, 23 women) completed a patient-reported knee function questionnaire and three hop tests (% of uninvolved limb)...
November 28, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29184728/diep-flap-breast-reconstruction-in-patients-with-breast-ptosis-2-stage-reconstruction-using-3-dimensional-surface-imaging-and-a-printed-mold
#20
Koichi Tomita, Kenji Yano, Mifue Taminato, Michiko Nomori, Ko Hosokawa
Background: Autologous breast reconstruction can be performed for breasts with ptosis to a certain extent, but if patients desire to correct ptosis, mastopexy of the contralateral breast is indicated. However, accurate prediction of post-mastopexy breast shape is difficult to make, and symmetrical breast reconstruction requires certain experience. We have previously reported the use of three-dimensional (3D) imaging and printing technologies in deep inferior epigastric artery perforator (DIEP) flap breast reconstruction...
October 2017: Plastic and Reconstructive Surgery. Global Open
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