scholarly journals A three-dimensional measurement approach for the morphology of the femoral head

2014 ◽  
Vol 225 (3) ◽  
pp. 358-366 ◽  
Author(s):  
Charys M. Martin ◽  
James G. Turgeon ◽  
Aashish Goela ◽  
Charles L. Rice ◽  
Timothy D. Wilson
Keyword(s):  
Femoral Head ◽  
Three Dimensional ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement ◽  
Measurement Approach

Sex determination from talus in Chinese population by three-dimensional measurement approach

2020 ◽  
Vol 44 ◽  
pp. 101647
Author(s):  
Yang Liu ◽  
Qing Han ◽  
Weihuang Yin ◽  
Chenyu Wang ◽  
Bingpeng Chen ◽  
...  
Keyword(s):  
Sex Determination ◽  
Chinese Population ◽  
Three Dimensional ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement ◽  
Measurement Approach

scholarly journals Morphological Measurement of the Femoral Anterior Bow in Chinese Population Based on Three-Dimensional Computed Tomography

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Yang Liu ◽  
Aobo Zhang ◽  
Rui Cai ◽  
Hao Chen ◽  
Chen Li ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Chinese Population ◽  
Medical Image Analysis ◽  
Three Dimensional ◽  
Medullary Cavity ◽  
Population Characteristics ◽  
Published Data ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement ◽  
Measurement Approach

Purpose. The femoral anterior bow is an important factor in matching a femoral implant to a femur. However, its morphology in the Chinese population has rarely been reported. In this study, a three-dimensional measurement approach was adopted to provide accurate data. The aim was to supply a reference for designing a long-stemmed femoral prosthesis that is more suitable for Chinese people. Methods. Computed tomography data were collected from both lower limbs of 96 normal volunteers and reconstructed into a three-dimensional model using Mimics software. The parameters of the femoral anterior bow were measured using medical image analysis software. Statistical analysis was conducted using independent-samples and paired-samples t -tests with SPSS software. Results. All the indexes showed significant sexual difference ( P < 0.05 ). The minimum cross-sectional area of the femoral medullary cavity was larger in men ( 10.77 ± 1.53  mm) than in women ( 9.79 ± 1.27  mm). The distance from the position of the maximum curvature to the lower edge of the lesser trochanter was also larger in men ( 60.93 ± 5.81  mm) than in women ( 56.31 ± 2.80  mm). However, the curvature of the femoral medullary cavity centerline was larger in women ( 883.57 ± 249.74  mm) than in men ( 958.79 ± 266.61  mm). The femoral anterior bow morphological indexes of Chinese subjects were different from the published data for other populations. There were no significant differences between left and right femoral anterior bows in either sex ( P > 0.05 ). Conclusion. The three-dimensional measurement approach adopted in this study is more convenient and accurate than previous conventional methods, with high repeatability. The morphological indexes of the femoral anterior bow in this research suggest that population characteristics should be taken into account. This study will provide references for the design of long-stemmed femoral prostheses in the Chinese population.

THREE-DIMENSIONAL MEASUREMENT OF COLUMNAR JOINTING IN THE BISHOP TUFF, OWENS RIVER GORGE, CALIFORNIA

2017 ◽  
Author(s):  
Antonio M. Bird ◽  
◽  
Katherine A. Kelker ◽  
Elizabeth S. Brogden ◽  
Jeff Glazner ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Bishop Tuff ◽  
Columnar Jointing ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement

scholarly journals The first observation of 4D tomography measurement of plasma structures and fluctuations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chanho Moon ◽  
Kotaro Yamasaki ◽  
Yoshihiko Nagashima ◽  
Shigeru Inagaki ◽  
Takeshi Ido ◽  
...  
Keyword(s):  
Steady State ◽  
Three Dimensional ◽  
Axial Direction ◽  
Axial Position ◽  
Entire Cross Section ◽  
Helicon Plasma ◽  
Emission Profile ◽  
Dimensional Measurement ◽  
Tomography System ◽  
Three Dimensional Measurement

AbstractA tomography system is installed as one of the diagnostics of new age to examine the three-dimensional characteristics of structure and dynamics including fluctuations of a linear magnetized helicon plasma. The system is composed of three sets of tomography components located at different axial positions. Each tomography component can measure the two-dimensional emission profile over the entire cross-section of plasma at different axial positions in a sufficient temporal scale to detect the fluctuations. The four-dimensional measurement including time and space successfully obtains the following three results that have never been found without three-dimensional measurement: (1) in the production phase, the plasma front propagates from the antenna toward the end plate with an ion acoustic velocity. (2) In the steady state, the plasma emission profile is inhomogeneous, and decreases along the axial direction in the presence of the azimuthal asymmetry. Furthermore, (3) in the steady state, the fluctuations should originate from a particular axial position located downward from the helicon antenna.

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