Cross-Sectional Profiles and Volume Reconstructions of Soft Tissues Using Laser Beam Measurements

2004 ◽  
Vol 126 (6) ◽  
pp. 796-802 ◽  
Author(s):  
Eve Langelier ◽  
Daniel Dupuis ◽  
Michel Guillot ◽  
Francine Goulet ◽  
Denis Rancourt
Keyword(s):  
Cross Sections ◽  
Soft Tissues ◽  
Optical Methods ◽  
Mechanical Contact ◽  
Cross Sectional ◽  
Collagen Matrices ◽  
Geometric Reconstruction ◽  
Computer Controlled ◽  
Beam Motion ◽  
Collimated Beam

Precise geometric reconstruction is a valuable tool in the study of soft tissues biomechanics. Optical methods have been developed to determine the tissue cross section without mechanical contact with the specimen. An adaptation of the laser micrometer developed by Lee and Woo [ASME J. Biomech. Eng., 110 (2), pp. 110–114]. is proposed in which the laser-collimated beam rotates around and moves along a fixed specimen to reconstruct its cross sections and volume. Beam motion is computer controlled to accelerate data acquisition and improve beam positioning accuracy. It minimizes time-dependent shape modifications and increases global reconstruction precision. The technique is also competent for the measurement of immersed collagen matrices.

scholarly journals Radiographic and Computed Tomographic Anatomy of the Donkey Carpus

2019 ◽  
Vol 36 (03) ◽  
pp. 145-155
Author(s):  
Mohamed A.M. Alsafy ◽  
Mahmoud H. El-Kammar ◽  
Samir R. Nouh ◽  
Howaida M. Abou-Ahmed ◽  
William Perez ◽  
...  
Keyword(s):  
Cross Sections ◽  
Soft Tissues ◽  
Imaging Techniques ◽  
Ct Scans ◽  
Full Description ◽  
Cross Sectional ◽  
X Ray ◽  
Computed Tomographic ◽  
Carpal Joint ◽  
The Cost

Introduction Joint diseases represent most of the musculoskeletal disorders. Therefore, the aim of the current study was to make a radiographic and computed tomographic analysis of the structures of the donkey carpus and investigate carpal joint affections. Materials and Methods The study was performed with the use of cross-sectional anatomy, digital X-ray and computed tomography (CT) scans. Twelve adult donkeys were used. Results The results provide a full description of the bones and soft tissues of the carpus. The carpal joint was examined at many levels using different CT and X-ray planes. The carpus was studied through bone and soft-tissue windows that were compared with cadaver cross-sections for interpretation. The study revealed some joint affections that were detected by the CT scans but were unapparent in X-ray films, such as bony cysts, hemorrhagic bony cysts, old and microfractures, and bony sclerosis. Some normal anatomic variants were recorded during the examination of the CT scans to assist the equine practitioners that deal with the carpal joints of donkeys. Conclusion Both imaging techniques are suitable for the examination of the carpus, and the selection of the technique is conditioned to many factors, like the type of tissue affected and economic reasons, such as the availability of the apparatus and the cost of the animal.

A New Method for Determining Cross-Sectional Shape and Area of Soft Tissues

1988 ◽  
Vol 110 (2) ◽  
pp. 110-114 ◽  
Author(s):  
Thay Q. Lee ◽  
Savio L-Y. Woo
Keyword(s):  
Soft Tissues ◽  
Cross Sectional Area ◽  
Reconstruction Technique ◽  
Sectional Area ◽  
Mechanical Contact ◽  
Cross Sectional ◽  
Image Reconstruction Technique ◽  
The Cross ◽  
Actual Shape ◽  
Sectional Shape

Assessment of the mechanical properties of soft tissues requires accurate measurement of the cross-sectional area. To date, techniques for determining cross-sectional areas of ligaments and tendons have been less than ideal due to the tissues’ complex geometries and the fact that they deform easily under an applied external load. A new procedure has been developed for determining the cross-sectional area by means of an image reconstruction technique based on measurements from collimated laser beams. Using this procedure, the actual shape of the specimen cross-section can also be determined. The results are demonstrated to be highly accurate, and this methodology does not require mechanical contact with the specimen.

SEM analysis of fish scale cross sections: A technique study

1992 ◽  
Vol 50 (1) ◽  
pp. 744-745
Author(s):  
M.E. Lee ◽  
A. Moller ◽  
P.S.O. Fouche ◽  
I.G Gaigher
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cross Sections ◽  
Soft Tissues ◽  
Close Association ◽  
Sem Analysis ◽  
Fish Scale ◽  
Fish Scales ◽  
Micro Structures ◽  
Scanning Electron

Scanning electron microscopy of fish scales has facilitated the application of micro-structures to systematics. Electron microscopy studies have added more information on the structure of the scale and the associated cells, many problems still remain unsolved, because of our incomplete knowledge of the process of calcification. One of the main purposes of these studies has been to study the histology, histochemistry, and ultrastructure of both calcified and decalcified scales, and associated cells, and to obtain more information on the mechanism of calcification in the scales. The study of a calcified scale with the electron microscope is complicated by the difficulty in sectioning this material because of the close association of very hard tissue with very soft tissues. Sections often shatter and blemishes are difficult to avoid. Therefore the aim of this study is firstly to develop techniques for the preparation of cross sections of fish scales for scanning electron microscopy and secondly the application of these techniques for the determination of the structures and calcification of fish scales.

Gender determination of caucasoid hair using image analysis

1993 ◽  
Vol 51 ◽  
pp. 216-217
Author(s):  
T.B. Ball ◽  
W.M. Hess
Keyword(s):  
Image Analysis ◽  
Cross Sections ◽  
Scalp Hair ◽  
The Body ◽  
Equivalent Diameter ◽  
Cross Sectional ◽  
Hair Samples ◽  
Length Width ◽  
Morphological Differences

It has been demonstrated that cross sections of bundles of hair can be effectively studied using image analysis. These studies can help to elucidate morphological differences of hair from one region of the body to another. The purpose of the present investigation was to use image analysis to determine whether morphological differences could be demonstrated between male and female human Caucasian terminal scalp hair.Hair samples were taken from the back of the head from 18 caucasoid males and 13 caucasoid females (Figs. 1-2). Bundles of 50 hairs were processed for cross-sectional examination and then analyzed using Prism Image Analysis software on a Macintosh llci computer. Twenty morphological parameters of size and shape were evaluated for each hair cross-section. The size parameters evaluated were area, convex area, perimeter, convex perimeter, length, breadth, fiber length, width, equivalent diameter, and inscribed radius. The shape parameters considered were formfactor, roundness, convexity, solidity, compactness, aspect ratio, elongation, curl, and fractal dimension.

Automated 3D measurement of fiber cross section morphology in handsheets

2012 ◽  
Vol 27 (2) ◽  
pp. 264-269 ◽  
Author(s):  
Christian Lorbach ◽  
Ulrich Hirn ◽  
Johannes Kritzinger ◽  
Wolfgang Bauer
Keyword(s):  
Image Analysis ◽  
Cross Section ◽  
Cross Sections ◽  
Image Plane ◽  
3D Measurement ◽  
Cross Sectional ◽  
Fiber Cross Section ◽  
Fiber Wall ◽  
Sectional Shape ◽  
Cross Section Geometry

Abstract We present a method for 3D measurement of fiber cross sectional morphology from handsheets. An automated procedure is used to acquire 3D datasets of fiber cross sectional images using an automated microtome and light microscopy. The fiber cross section geometry is extracted using digital image analysis. Simple sample preparation and highly automated image acquisition and image analysis are providing an efficient tool to analyze large samples. It is demonstrated that if fibers are tilted towards the image plane the images of fiber cross sections are always larger than the true fiber cross section geometry. In our analysis the tilting angles of the fibers to the image plane are measured. The resulting fiber cross sectional images are distorted to compensate the error due to fiber tilt, restoring the true fiber cross sectional shape. We use an approximated correction, the paper provides error estimates of the approximation. Measurement results for fiber wall thickness, fiber coarseness and fiber collapse are presented for one hardwood and one softwood pulp.

scholarly journals Cross-sectional anatomy, computed tomography, and magnetic resonance imaging of the banded houndshark (Triakis scyllium)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sang Wha Kim ◽  
Adams Hei Long Yuen ◽  
Cherry Tsz Ching Poon ◽  
Joon Oh Hwang ◽  
Chang Jun Lee ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Soft Tissues ◽  
Imaging Techniques ◽  
Evolutionary Developmental Biology ◽  
Phylogenetic Position ◽  
Ct Scanner ◽  
Resonance Imaging ◽  
Cross Sectional

AbstractDue to their important phylogenetic position among extant vertebrates, sharks are an invaluable group in evolutionary developmental biology studies. A thorough understanding of shark anatomy is essential to facilitate these studies and documentation of this iconic taxon. With the increasing availability of cross-sectional imaging techniques, the complicated anatomy of both cartilaginous and soft tissues can be analyzed non-invasively, quickly, and accurately. The aim of this study is to provide a detailed anatomical description of the normal banded houndshark (Triakis scyllium) using computed tomography (CT) and magnetic resonance imaging (MRI) along with cryosection images. Three banded houndsharks were scanned using a 64-detector row spiral CT scanner and a 3 T MRI scanner. All images were digitally stored and assessed using open-source Digital Imaging and Communications in Medicine viewer software in the transverse, sagittal, and dorsal dimensions. The banded houndshark cadavers were then cryosectioned at approximately 1-cm intervals. Corresponding transverse cryosection images were chosen to identify the best anatomical correlations for transverse CT and MRI images. The resulting images provided excellent detail of the major anatomical structures of the banded houndshark. The illustrations in the present study could be considered as a useful reference for interpretation of normal and pathological imaging studies of sharks.

scholarly journals The Level of Lymphedema Awareness among Women with Breast Cancer in the Kingdom of Saudi Arabia

2021 ◽  
Vol 18 (2) ◽  
pp. 627
Author(s):  
Fatmah Alsharif ◽  
Wedad Almutairi ◽  
Faygah Shibily ◽  
Fatmah Alhothari ◽  
Fidaa Batwa ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Saudi Arabia ◽  
Soft Tissues ◽  
Demographic Data ◽  
Medical Team ◽  
Online Questionnaire ◽  
Kingdom Of Saudi Arabia ◽  
Cross Sectional ◽  
Convenience Sample ◽  
The Status

Background: Lymphedema is a condition in which excessive fluid accumulates in soft tissues. It is a common complication of breast cancer treatments. It can lead to serious consequences and interfere with the activity of daily living. This study aimed to determine the level of awareness of breast-cancer-related lymphedema (BCRL) among women with breast cancer in the Kingdom of Saudi Arabia. This was a descriptive quantitative cross-sectional design that included a convenience sample of women diagnosed with breast cancer in the Kingdom of Saudi Arabia. Data were collected by distributing a self-administrated online questionnaire consisting of four parts, including demographic data (five items), the status of education about BCRL (three items), basic medical history of breast cancer (six items), and BCRL level of awareness of risk factors and management (nine items). Results: In total, 95 out of 135 of participants did not know about lymphedema, 119 of the participants (88.1%) did not receive any explanation about the possibility of lymphedema from their medical team before surgery, and 121 of them (89.6%) did not receive it after surgery. The most significant factor affecting participants’ level of awareness regarding BCRL was the lack of information about the possibility of BCRL occurrence, which was not provided to them by the medical team. Recommendation: Early and continuous education for future management is essential to prevent problems related to BCRL and improve quality of life.

scholarly journals Thermo-Hydraulic Performance of U-Tube Borehole Heat Exchanger with Different Cross-Sections

2021 ◽  
Vol 13 (6) ◽  
pp. 3255
Author(s):  
Aizhao Zhou ◽  
Xianwen Huang ◽  
Wei Wang ◽  
Pengming Jiang ◽  
Xinwei Li
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Heat Resistance ◽  
Cross Sections ◽  
Three Dimensional ◽  
Thermal Response ◽  
Transfer Efficiency ◽  
Cross Sectional ◽  
Heat Transfer Efficiency ◽  
Oval Tube

For reducing the initial GSHP investment, the heat transfer efficiency of the borehole heat exchange (BHE) system can be enhanced to reduce the number or depth of drilling. This paper proposes a novel and simple BHE design by changing the cross-sectional shape of the U-tube to increase the heat transfer efficiency of BHEs. Specifically, in this study, we (1) verified the reliability of the three-dimensional numerical model based on the thermal response test (TRT) and (2) compared the inlet and outlet temperatures of the different U-tubes at 48 h under the premise of constant leg distance and fluid area. Referent to the circular tube, the increases in the heat exchange efficiencies of the curved oval tube, flat oval tube, semicircle tube, and sector tube were 13.0%, 19.1%, 9.4%, and 14.8%, respectively. (3) The heat flux heterogeneity of the tubes on the inlet and outlet sides of the BHE, in decreasing order, is flat oval, semicircle, curved oval, sector, and circle shapes. (4) The temperature heterogeneity of the borehole wall in the BHE in decreasing order is circle, sector, curved oval, flat oval, and semicircle shapes. (5) Under the premise of maximum leg distance, referent to the heat resistance of the tube with a circle shape at 48 h, the heat exchange efficiency of the curved oval, flat oval, semicircle, and sector tubes increased 12.6%, 17.7%, 10.3%, and 7.8%, respectively. (6) We found that the adjustments of the leg distance and the tube shape affect the heat resistance by about 25% and 12%, respectively. (7) The flat-oval-shaped tube at the maximum leg distance was found to be the best tube design for BHEs.

Comparison of the Cross Sectional Area, the Loss in Volume and the Mechanical Properties of LAE442 and MgCa0.8 as Resorbable Magnesium Alloy Implants after 12 Months Implantation Duration

2010 ◽  
Vol 638-642 ◽  
pp. 675-680 ◽  
Author(s):  
Martina Thomann ◽  
Nina von der Höh ◽  
Dirk Bormann ◽  
Dina Rittershaus ◽  
C. Krause ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cross Sections ◽  
Degradation Process ◽  
Cross Sectional Area ◽  
Bending Test ◽  
Sectional Area ◽  
Cross Sectional ◽  
Initial Strength ◽  
Three Point Bending ◽  
The Cross

Current research focuses on magnesium based alloys in the course of searching a resorbable osteosynthetic material which provides sufficient mechanical properties besides a good biocompatibility. Previous studies reported on a favorable biocompatibility of the alloys LAE442 and MgCa0.8. The present study compared the degradation process of cylindrical LAE442 and MgCa0.8 implants after 12 months implantation duration. Therefore, 10 extruded implants (2.5 x 25 mm, cross sectional area 4.9 mm²) of both alloys were implanted into the medullary cavity of both tibiae of rabbits for 12 months. After euthanization, the right bone-implant-compound was scanned in a µ-computed tomograph (µCT80, ScancoMedical) and nine uniformly distributed cross-sections of each implant were used to determine the residual implants´ cross sectional area (Software AxioVisionRelease 4.5, Zeiss). Left implants were taken out of the bone carefully. After weighing, a three-point bending test was carried out. LAE442 implants degraded obviously slower and more homogeneously than MgCa0.8. The mean residual cross sectional area of LAE442 implants was 4.7 ± 0.07 mm². MgCa0.8 showed an area of only 2.18 ± 1.03 mm². In contrast, the loss in volume of LAE442 pins was more obvious. They lost 64 % of their initial weight. The volume of MgCa0.8 reduced clearly to 54.4 % which corresponds to the cross sectional area results. Three point bending tests revealed that LAE442 showed a loss in strength of 71.2 % while MgCa0.8 lost 85.6 % of its initial strength. All results indicated that LAE442 implants degraded slowly, probably due to the formation of a very obvious degradation layer. Degradation of MgCa0.8 implants was far advanced.

Musculoskeletal Injuries Among Victims of the Battagram, Pakistan Earthquake in October 2005

2012 ◽  
Vol 27 (5) ◽  
pp. 489-491 ◽  
Author(s):  
Ghulam Mustafa Kaim Khani ◽  
Akhtar Baig ◽  
Mujahid Humail ◽  
Manzoor Memon ◽  
M.A. Quarashi
Keyword(s):  
Soft Tissues ◽  
Head Injuries ◽  
Cross Sectional Study ◽  
Musculoskeletal Injuries ◽  
Publication Type ◽  
Disaster Plan ◽  
Cross Sectional ◽  
Surgical Interventions ◽  
North West ◽  
Wound Debridement

AbstractObjectiveThis study was conducted to assess the type, pattern, and severity of musculoskeletal injuries, as well as the type of simple orthopedic surgical procedures, that can be performed at the site of a disaster.MethodsThis was a cross-sectional study conducted in Battagram, located in the North West Frontier Province of Pakistan after the October 2005 earthquake. Researchers arrived in the affected area during the second week after the earthquake, and remained there for one week. During this period, patients were received from distant areas of the district. These patients were admitted to a tent hospital because the district headquarters hospital was completely damaged. Those requiring orthopedic surgical intervention or closed manipulation and plaster of paris casts were included in the study.ResultsOf 110 patients, 61 were female and 49 were male, and 140 bones were involved. In this series, 92 fractures were closed, while 48 were open. A total of 67.3% of the patients were <40 years of age. The tibia was involved in 32.1% of cases and the femur 16.4%. No cases of compartment syndrome were found. Wound debridement was performed in 35 cases. An external fixator was applied to 10 cases of open tibia fractures. Four humerus fractures and a fracture to the radius and ulna were fixed with the Rashnail method. One open femur fracture was repaired with external fixation. Pre- and post-operative antibiotics were administered in all cases. Thirty patients sustained injuries in addition to orthopedic trauma: 13 vertebral injuries, eight head injuries, six fractured ribs, three blunt injuries to the abdomen, and 10 significant soft tissues injuries without bony involvement.ConclusionsAfter the earthquake in Battagram, young persons, especially females, were prone to orthopedic injuries, mainly involving the extremities. A comprehensive disaster plan would have helped to manage these emergencies, and further experience is needed for on-site surgical interventions.Kaim KhaniGM, BaigA, HumailM, MemonM, QuarashiMA. Musculoskeletal injuries among victims of the Battagram, Pakistan earthquake in October 2005. Prehosp Disaster Med.2012;27(5):1-3.

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