scholarly journals Pulsatile tissue deformation dynamics of themurine retina and choroid mapped by 4D opticalcoherence tomography

2021 ◽  
Author(s):  
Bernhard Baumann ◽  
Conrad Merkle ◽  
Marco Augustin ◽  
Martin Glösmann ◽  
Gerhard Garhofer
Keyword(s):  
Tissue Deformation ◽  
Deformation Dynamics

scholarly journals Quantitative and comparative analysis of tissue deformation dynamics for chick and Xenopus limb morphogenesis

2017 ◽  
Vol 145 ◽  
pp. S40
Author(s):  
Yoshihiro Morishita ◽  
Takayuki Suzuki ◽  
Hitoshi Yokoyama ◽  
Yasuhiro Kamei ◽  
Koji Tamura ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Tissue Deformation ◽  
Limb Morphogenesis ◽  
Deformation Dynamics

scholarly journals Menstrual Pain and Elasticity of Uterine Cervix

2021 ◽  
Vol 10 (5) ◽  
pp. 1110
Author(s):  
Anjeza Xholli ◽  
Gianluca Simoncini ◽  
Sonja Vujosevic ◽  
Giulia Trombetta ◽  
Alessandra Chiodini ◽  
...  
Keyword(s):  
Uterine Cervix ◽  
Ultrasound Elastography ◽  
Cervical Canal ◽  
Tissue Deformation ◽  
Tissue Elasticity ◽  
Menstrual Pain ◽  
Pain Mechanisms ◽  
High Elasticity ◽  
Color Score ◽  
Post Hoc

Menstrual pain is consequent to intense uterine contraction aimed to expel menstrual flow through downstream uterine cervix. Herein it was evaluated whether characteristics of uterine cervix are associated with intensity of menstrual pain. Ultrasound elastography was used to analyze cervix elasticity of 75 consecutive outpatient women. Elasticity was related to intensity of menstrual pain defined by a Visual Analogue Scale (VAS). Four regions of interest (ROI) were considered: internal uterine orifice (IUO), anterior (ACC) and posterior cervical (PCC) compartment and middle cervical canal (MCC). Tissue elasticity, evaluated by color score (from 0.5 = blue/violet (low elasticity) to 3.0 = red (high elasticity), and percent tissue deformation was analyzed. Elasticity of IUO was lower (p = 0.0001) than that of MCC or ACC, and it was negatively related (R2 = 0.428; p = 0.0001) to menstrual VAS (CR −2.17; 95%CI −3.80, −0.54; p = 0.01). Presence of adenomyosis (CR 3.24; 95% CI 1.94, 4.54; p = 0.0001) and cervix tenderness at clinical examination (CR 2.74; 95% CI 1.29, 4.20; p = 0.0004), were also independently related to menstrual VAS. At post hoc analysis, women with vs. without menstrual pain had lower IUO elasticity, expressed as color score (0.72 ± 0.40 vs. 0.92 ± 0.42; p = 0.059), lower percent tissue deformation at IUO (0.09 ± 0.05 vs. 0.13 ± 0.08; p = 0.025), a higher prevalence of cervical tenderness at bimanual examination (36.2% vs. 9.5%; p = 0.022) and a higher prevalence of adenomyosis (46.5% vs. 19.9%; p = 0.04). These preliminary data indicate that IUO elasticity is associated with the presence and the intensity of menstrual pain. Mechanisms determining IUO elasticity are useful to be explored.

scholarly journals 435 Topological surface mapping with computer vision to measure cutaneous tissue deformation from digital images

2021 ◽  
Vol 141 (5) ◽  
pp. S75
Author(s):  
E.L. Larson ◽  
D.P. DeMeo ◽  
C. Shi ◽  
J.M. Galeotti ◽  
B.T. Carroll
Keyword(s):  
Computer Vision ◽  
Digital Images ◽  
Tissue Deformation ◽  
Surface Mapping ◽  
Cutaneous Tissue ◽  
Topological Surface

scholarly journals Strain Tensor Imaging: Cardiac-induced brain tissue deformation in humans quantified with high-field MRI

NeuroImage ◽  
2021 ◽  
pp. 118078
Author(s):  
Jacob-Jan Sloots ◽  
Geert Jan Biessels ◽  
Alberto de Luca ◽  
Jaco J.M. Zwanenburg
Keyword(s):  
Brain Tissue ◽  
High Field ◽  
Strain Tensor ◽  
Tissue Deformation ◽  
High Field Mri

scholarly journals Cylindrically and non-cylindrically symmetric expansion dynamics of tin microdroplets after ultrashort laser pulse impact

2021 ◽  
Vol 127 (2) ◽  
Author(s):  
Tiago de Faria Pinto ◽  
Jan Mathijssen ◽  
Randy Meijer ◽  
Hao Zhang ◽  
Alex Bayerle ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Droplet Deformation ◽  
Cylindrically Symmetric ◽  
Linearly Polarized ◽  
Particle Hydrodynamics ◽  
Deformation Dynamics ◽  
Smoothed Particle ◽  
Asymmetric Shock

AbstractIn this work, the expansion dynamics of liquid tin micro-droplets irradiated by femtosecond laser pulses were investigated. The effects of laser pulse duration, energy, and polarization on ablation, cavitation, and spallation dynamics were studied using laser pulse durations ranging from 220 fs to 10 ps, with energies ranging from 1 to 5 mJ, for micro-droplets with an initial radius of 15 and 23 $$\upmu$$ μ m. Using linearly polarized laser pulses, cylindrically asymmetric shock waves were produced, leading to novel non-symmetric target shapes, the asymmetry of which was studied as a function of laser pulse parameters and droplet size. A good qualitative agreement was obtained between smoothed-particle hydrodynamics simulations and high-resolution stroboscopic experimental data of the droplet deformation dynamics.

VOLUME MANIPULATION FOR SIMULATING FACIAL CONTOURING SURGERY

2014 ◽  
Vol 26 (01) ◽  
pp. 1450016 ◽  
Author(s):  
Ming-Dar Tsai ◽  
Feng-Chou Tsai ◽  
Chih-Lung Lin ◽  
Ming-Shium Hsieh
Keyword(s):  
Wound Healing ◽  
Surgical Procedures ◽  
Surgical Procedure ◽  
Tissue Deformation ◽  
Bone Morphology ◽  
Facial Bone ◽  
High Quality ◽  
3D Images ◽  
Case Examples ◽  
The Face

In facial contouring surgery, surgeons operate the facial bone to correct bone morphology and thus achieve esthetic feminine face. To evaluate the face appearance after surgery and rehearse every surgical procedure in facial contouring surgery, simulations for tissue peeling, incising and suturing on the face together with bone burring and grafting on the facial bone are required. This paper presents a method that transforms respective tissue vertices to simulate tissue peeling. The transformation is based on specified incisions and clamps as in real facial contouring surgery. This paper also uses an auxiliary structure to represent and record tissue boundary changes inside the face. The elastic, partially plastic and plastic tissue deformation and wound formation during an incision can be simulated by manipulating these boundary changes. The incised wound recorded in the auxiliary structure is also manipulated to simulate tissue generation in wound healing during a suture. This volume manipulation method is combined with the reported method for bone burring and grafting simulations so that high-quality 3D images for illustrating surgical procedures both on the face and facial bone can be achieved. Simulations of two case examples including tissue peeling, incising and suturing procedures, and three modalities of facial contouring surgery demonstrate the effectiveness of the proposed method and system.

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