Fetal biometry: how well can offline measurements from three-dimensional volumes substitute real-time two-dimensional measurements?

2013 ◽  
Vol 42 (5) ◽  
pp. 560-570 ◽  
Author(s):  
I. Sarris ◽  
E. Ohuma ◽  
C. Ioannou ◽  
J. Sande ◽  
D. G. Altman ◽  
...  
Keyword(s):  
Real Time ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Fetal Biometry ◽  
Dimensional Measurements

CALCULATION OF THE DEPENDENCE OF THE DISTANCE TO THE LOCATED OBJECT FROM THE CORNER POSITION OF THE VEHICLE LINE

2018 ◽  
pp. 14-18
Author(s):  
V. V. Artyushenko ◽  
A. V. Nikulin
Keyword(s):  
Real Time ◽  
Statistical Physics ◽  
Angular Position ◽  
Three Dimensional ◽  
Line Of Sight ◽  
Two Dimensional ◽  
Radar Station ◽  
Flight Mode ◽  
Vector Algebra ◽  
Analytical Expressions

To simulate echoes from the earth’s surface in the low flight mode, it is necessary to reproduce reliably the delayed reflected sounding signal of the radar in real time. For this, it is necessary to be able to calculate accurately and quickly the dependence of the distance to the object being measured from the angular position of the line of sight of the radar station. Obviously, the simplest expressions for calculating the range can be obtained for a segment or a plane. In the text of the article, analytical expressions for the calculation of range for two-dimensional and three-dimensional cases are obtained. Methods of statistical physics, vector algebra, and the theory of the radar of extended objects were used. Since the calculation of the dependence of the range of the object to the target from the angular position of the line of sight is carried out on the analytical expressions found in the paper, the result obtained is accurate, and due to the relative simplicity of the expressions obtained, the calculation does not require much time.

Comparison of Real Time Two-Dimensional with Live/Real Time Three-Dimensional Transesophageal Echocardiography in the Evaluation of Mitral Valve Prolapse and Chordae Rupture

2008 ◽  
Vol 25 (10) ◽  
pp. 1131-1137 ◽  
Author(s):  
Jayaprakash Manda ◽  
Saritha Kumari Kesanolla ◽  
Ming Chon Hsuing ◽  
Navin C. Nanda ◽  
Elsayed Abo-Salem ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Transesophageal Echocardiography ◽  
Real Time ◽  
Mitral Valve Prolapse ◽  
Three Dimensional ◽  
Two Dimensional

scholarly journals Three-Dimensional Coordination Number from Two-Dimensional Measurements: A New Method

1986 ◽  
Vol 32 (112) ◽  
pp. 391-396 ◽  
Author(s):  
Richard B. Alley
Keyword(s):  
Coordination Number ◽  
Three Dimensional ◽  
New Method ◽  
Two Dimensional ◽  
Shape Factors ◽  
Important Measure ◽  
Dimensional Measurements ◽  
Average Bond

AbstractThe average three-dimensional coordination number, n3, is an important measure of firn structure. The value of n3 can be estimated from n2, the average measured two-dimensional coordination number, and from a function, Γ, that depends only on the ratio of average bond radius to grain radius in the sample. This method is easy to apply and does not require the use of unknown shape factors or tunable parameters.

scholarly journals Automated three-dimensional measurements of version, inclination, and subluxation

2019 ◽  
Vol 12 (1) ◽  
pp. 31-37
Author(s):  
Dave R Shukla ◽  
Richard J McLaughlin ◽  
Julia Lee ◽  
Ngoc Tram V Nguyen ◽  
Joaquin Sanchez-Sotelo
Keyword(s):  
Computed Tomography ◽  
Image Analysis ◽  
Three Dimensional ◽  
Automated Image Analysis ◽  
Two Dimensional ◽  
Analysis Software ◽  
Glenoid Version ◽  
Image Analysis Software ◽  
Planning Software ◽  
Dimensional Measurements

Background Preoperative planning software has been developed to measure glenoid version, glenoid inclination, and humeral head subluxation on computed tomography (CT) for shoulder arthroplasty. However, most studies analyzing the effect of glenoid positioning on outcome were done prior to the introduction of planning software. Thus, measurements obtained from the software can only be extrapolated to predict failure provided they are similar to classic measurements. The purpose of this study was to compare measurements obtained using classic manual measuring techniques and measurements generated from automated image analysis software. Methods Ninety-five two-dimensional computed tomography scans of shoulders with primary glenohumeral osteoarthritis were measured for version according to Friedman method, inclination according to Maurer method, and subluxation according to Walch method. DICOM files were loaded into an image analysis software (Blueprint, Wright Medical) and the output was compared with values obtained manually using a paired sample t-test. Results Average manual measurements included 13.8° version, 13.2° inclination, and 56.2% subluxation. Average image analysis software values included 17.4° version (3.5° difference, p < 0.0001), 9.2° inclination (3.9° difference, p < 0.001), and 74.2% for subluxation (18% difference, p < 0.0001). Conclusions Glenoid version and inclination values from the software and manual measurement on two-dimensional computed tomography were relatively similar, within approximately 4°. However, subluxation measurements differed by approximately 20%.

scholarly journals EP22.20: Automated three-dimensional measurements of cephalic fetal biometry: feasibility and reproducibility

2017 ◽  
Vol 50 ◽  
pp. 364-364
Author(s):  
G. Ambroise Grandjean ◽  
G. Hossu ◽  
C. Bertholdt ◽  
A. Chabot-Lecoanet ◽  
G. Grangé
Keyword(s):  
Three Dimensional ◽  
Fetal Biometry ◽  
Dimensional Measurements

Two‐dimensional fetal biometry versus three‐dimensional fractional thigh volume for ultrasonographic prediction of birthweight

2019 ◽  
Vol 145 (1) ◽  
pp. 47-53 ◽  
Author(s):  
K. Aparna Sharma ◽  
Dipti Das ◽  
Vatsla Dadhwal ◽  
Dipika Deka ◽  
Seema Singhal ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Two Dimensional ◽  
Fetal Biometry
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