scholarly journals Quantitative three-dimensional assessment of Madelung deformity

2019 ◽  
Vol 44 (10) ◽  
pp. 1041-1048
Author(s):  
Abbas Peymani ◽  
Johannes G. G. Dobbe ◽  
Geert J. Streekstra ◽  
Henry R. McCarroll ◽  
Simon D. Strackee
Keyword(s):  
Three Dimensional ◽  
Two Dimensional ◽  
Madelung Deformity ◽  
Radiocarpal Joint ◽  
Dimensional Parameters ◽  
Wrist Anatomy ◽  
Diagnostic Work ◽  
Dimensional Assessment ◽  
Work Up ◽  
Lunate Fossa

In the diagnostic work-up of Madelung deformity conventional radiographic imaging is often used, assessing the three-dimensional deformity in a two-dimensional manner. A three-dimensional approach could expand our understanding of Madelung deformity’s complex wrist anatomy, while removing inter- and intra-rater differences. We measured previous two-dimensional-based and newly developed three-dimensional-based parameters in 18 patients with Madelung deformity (28 wrists) and 35 healthy participants (56 wrists). Madelung deformity wrists have increased levels of ulnar tilt, lunate subsidence, lunate fossa angle, and palmar carpal displacement. The lunate fossa is more concave and irregular, and angles between scaphoid, lunate, and triquetral bones are decreased. These findings validate the underlying principles of current two-dimensional criteria and reveal previously unknown anatomical abnormalities by utilizing novel three-dimensional parameters to quantify the radiocarpal joint.

scholarly journals Two-dimensional and Three-dimensional Assessment of the Upper Airway

2017 ◽  
Vol 35 (1) ◽  
pp. 357-362 ◽  
Author(s):  
Isabella Vilaza ◽  
Pamela Araya-Díaz ◽  
Hernán M Palomino
Keyword(s):  
Three Dimensional ◽  
Upper Airway ◽  
Two Dimensional ◽  
Dimensional Assessment

Micro-CT analysis of two-dimensional and three-dimensional parameters in severely curved roots prepared with 3 instrumentation systems: An in vitro study

2020 ◽  
Vol 9 (2) ◽  
pp. 62
Author(s):  
AntonioMiranda da Cruz-Filho ◽  
LuisEduardo Souza-Flamini ◽  
BrunoMonguilhott Crozeta ◽  
RicardoGariba Silva ◽  
RicardoNovak Savioli ◽  
...  
Keyword(s):  
Three Dimensional ◽  
In Vitro Study ◽  
Vitro Study ◽  
Two Dimensional ◽  
Micro Ct ◽  
Ct Analysis ◽  
Dimensional Parameters

Two- and Three-Dimensional Analyses of Surfaces According to the E-System

1974 ◽  
Vol 188 (1) ◽  
pp. 691-699 ◽  
Author(s):  
M. S. Shunmugam ◽  
V. Radhakrishnan
Keyword(s):  
Surface Roughness ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Roughness Measurement ◽  
Doubly Curved ◽  
Dimensional Assessment

The E-system of roughness measurement can be used either for a two-dimensional or a three-dimensional assessment of surface roughness. The procedure for computing the two- and three-dimensional envelopes from digitized profiles is briefly explained. This method will be useful for verifying the results obtained by practical instruments. The filtering characteristic of the E-system, when used for two- and three-dimensional roughness measurement, is analysed with reference to theoretical profiles. Various skid configurations are studied using a doubly curved skid simulated by a computer.

Parameter correlation study of cylinder liner roughness for production and quality control

2008 ◽  
Vol 222 (11) ◽  
pp. 1475-1487 ◽  
Author(s):  
B-G Rosen ◽  
C Anderberg ◽  
R Ohlsson
Keyword(s):  
Three Dimensional ◽  
Cylinder Liner ◽  
Correlation Study ◽  
Two Dimensional ◽  
Strong Correlations ◽  
Intrinsic Variability ◽  
Dimensional Parameters ◽  
Liner Surface ◽  
Highly Correlated

Surface roughness plays an important role in the control of emissions and friction losses in the cylinder liner—piston ring system as well as securing economically favourable manufacturing. A number of different commercial cylinder liner types have been characterized using traditional two-dimensional stylus and ISO parameters together with the latest three-dimensional characterization. The results highlight the weak and strong correlations between different families of parameters traditionally used for liner surface specifications. The bearing curve based Rxq and Rk parameter families have been evaluated and show systematic and consistent differences when characterizing the same surface features when trying to establish independent characterization of the highly stratified, two-process cylinder liner surfaces. No significant improvement in discrimination results from using ensemble averages. Presentation of correlations in the form of topological diagrams helps to show when parameters with a high intrinsic variability can be effectively replaced by other more robust parameters with which they have a high correlation. Plateau parameters are in general more highly correlated than valley parameters. Three-dimensional parameters show high internal correlations and also correlate highly with some corresponding two-dimensional parameters.

scholarly journals Ganglioneurofibroma Arising Within the Extralobar Pulmonary Sequestration

2020 ◽  
Author(s):  
Yuanyuan Liu ◽  
Wenbin Wu ◽  
Longbo Gong ◽  
Miao Zhang
Keyword(s):  
Mediastinal Lymph Node ◽  
Three Dimensional ◽  
Pulmonary Sequestration ◽  
Whole Body ◽  
Case Presentation ◽  
Lymph Node Sampling ◽  
Diagnostic Work ◽  
Work Up ◽  
Aberrant Vessels

Abstract Background: Neurogenic tumor arising within the pulmonary sequestration (PS) is rare.Case Presentation: A 42-year-old asymptomatic female was referred to our hospital for work-up of extralobar PS. The independent feeding artery from the thoracic aorta was confirmed by three-dimensional computed tomography angiography (3D-CTA). Extrapulmonary lesions were excluded by whole-body radiographical examinations. Uniportal thoracoscopic resection of the sequestrated lung and mediastinal lymph node sampling was performed successfully. Finally, ganglioneurofibroma within the PS was confirmed by pathological staining. The patient was discharged from the hospital on the 3rd postoperative day without tumor recurrence a year after surgery.Conclusion: Preoperative 3D-CTA is useful to verify the aberrant vessels of PS; whereas an elaborate diagnostic work-up after a timely resection is necessary for possible subsequent management and follow-up plan.

Methods and applications of fracture trace analysis in the quantification of structural geology

1969 ◽  
Vol 106 (5) ◽  
pp. 430-451 ◽  
Author(s):  
J. F. Huntington
Keyword(s):  
Three Dimensional ◽  
Mechanical Analysis ◽  
Aerial Photographs ◽  
Two Dimensional ◽  
Linear Features ◽  
Naturally Occurring ◽  
Analysis And Synthesis ◽  
Linear Elements ◽  
Dimensional Parameters ◽  
Air Photo

SUMMARYNaturally occurring linear features recognisable on aerial photographs may be related to bedrock tectonics. The identification and analysis of such linear elements, “megajoints”, reveals much information about the style and dimensions of subsurface geologic structures. Various terminologies, as applicable to air photo linears, are brought together and analysis is carried out in four test applications of Permyakov's original methods, the calculation of three-dimensional parameters from two-dimensional data. Some comparison is made with other techniques. Much of this linear vector analysis is carried out manually but possibilities exist for mechanical analysis and synthesis using certain up-to-date techniques. The methods described are applicable to many fields of academic and practical geology at or above the reconnaissance level.

scholarly journals Ganglioneurofibroma arising within the extralobar pulmonary sequestration

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Yuanyuan Liu ◽  
Wenbin Wu ◽  
Longbo Gong ◽  
Miao Zhang
Keyword(s):  
Mediastinal Lymph Node ◽  
Three Dimensional ◽  
Neuron Specific Enolase ◽  
Pulmonary Sequestration ◽  
Lymph Node Sampling ◽  
S 100 ◽  
Diagnostic Work ◽  
Work Up ◽  
Aberrant Vessels

Abstract Background Neurogenic tumor arising within the pulmonary sequestration (PS) is rare. Case presentation A 42-year-old asymptomatic female was referred to our hospital for work-up of extralobar PS. The independent feeding artery from the thoracic aorta was confirmed by three-dimensional computed tomography angiography (3D-CTA). Uniportal thoracoscopic resection of the sequestrated lung with mediastinal lymph node sampling was performed successfully. Ganglioneurofibroma within the PS was diagnosed as the specimen revealed positive expression of SRY-related HMG-box 10 protein, neuron-specific enolase, S-100, chromogranin A and synuclein. Tumor recurrence was not recorded 1 year after the surgery. Conclusion Preoperative 3D-CTA is useful to identify the aberrant vessels of PS. An elaborate diagnostic work-up after a timely resection is necessary for subsequent management and follow-up plan.

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