Three-dimensional measurements in gas flows

1986 ◽  
Author(s):  
Brandon Yip ◽  
Marshall B. Long
Keyword(s):  
Three Dimensional ◽  
Gas Flows ◽  
Dimensional Measurements

scholarly journals IMG-07. GADOLINIUM IS NOT NECESSARY FOR SURVEILLANCE MR IMAGING IN CHILDREN WITH CHIASMATIC-HYPOTHALAMIC LOW GRADE GLIOMA

2020 ◽  
Vol 22 (Supplement_3) ◽  
pp. iii356-iii356
Author(s):  
Fatema Malbari ◽  
Murali Chintagumpala ◽  
Jack Su ◽  
Mehmet Okcu ◽  
Frank Lin ◽  
...  
Keyword(s):  
Metastatic Disease ◽  
Three Dimensional ◽  
Low Grade Glioma ◽  
Cancer Center ◽  
Low Grade ◽  
Contrast Imaging ◽  
Post Contrast ◽  
Best Response ◽  
Dimensional Measurements ◽  
Initiation Of Therapy

Abstract BACKGROUND Patients with chiasmatic-hypothalamic low grade glioma (CHLGG) have frequent MRIs with gadolinium based contrast agents (GBCA) for disease monitoring. Cumulative gadolinium deposition in children is a potential concern. The purpose of this research is to establish whether MRI with GBCA is necessary for determining tumor progression in children with CHLGG. METHODS Children with progressive CHLGG were identified from Texas Children’s Cancer Center between 2005–2019. Pre- and post-contrast MRI sequences were separately reviewed by one neuroradiologist who was blinded to the clinical course. Three dimensional measurements and tumor characteristics were collected. Radiographic progression was defined as a 25% increase in size (product of two largest dimensions) compared to baseline or best response after initiation of therapy. RESULTS A total of 28 patients with progressive CHLGG including 683 MRIs with GBCA (mean 24 MRIs/patient; range: 10–43 MRIs) were reviewed. No patients had a diagnosis of NF1. Progression was observed 92 times, 91 (98.9%) on noncontrast and 90 (97.8%) on contrast imaging. Sixty-seven radiographic and/or clinical progressions necessitating management changes were identified in all (100%) noncontrast sequences and 66 (98.5%) contrast sequences. Tumor growth >2 mm in any dimension was identified in 184/187(98.4%) on noncontrast and 181/187(96.8%) with contrast imaging. Non primary metastatic disease was seen in seven patients (25%), which were better visualized on contrast imaging in 4 (57%). CONCLUSION MRI without GBCA effectively identifies patients with progressive disease. One should consider eliminating contrast in imaging of children with CHLGG with GBCA reserved for monitoring those with metastatic disease.

Three-dimensional measurements of the lower extremity in children and adolescents using a low-dose biplanar X-ray device

2011 ◽  
Vol 22 (4) ◽  
pp. 765-771 ◽  
Author(s):  
Ramon Gheno ◽  
Eric Nectoux ◽  
Bernard Herbaux ◽  
Matteo Baldisserotto ◽  
Luiz Glock ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Children And Adolescents ◽  
Low Dose ◽  
Three Dimensional ◽  
X Ray ◽  
Dimensional Measurements

Three dimensional, stratified gas flows past an obstacle

1984 ◽  
Vol 55 (3) ◽  
pp. 347-368 ◽  
Author(s):  
Mark A Hausman ◽  
William W Roberts
Keyword(s):  
Three Dimensional ◽  
Gas Flows

scholarly journals Three-Dimensional Measurements of Micro- to Nanometer-Scale Features at and Below the Surface Using Scanning Electron Microscopy

2011 ◽  
Vol 17 (S2) ◽  
pp. 992-993
Author(s):  
M Zhao ◽  
B Ming ◽  
P Kavuri ◽  
A Vladár
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Three Dimensional ◽  
Nanometer Scale ◽  
Dimensional Measurements ◽  
Scanning Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

Serial Observation of Asymmetry in the Growing Face

1992 ◽  
Vol 19 (4) ◽  
pp. 273-285 ◽  
Author(s):  
P. H. Burke
Keyword(s):  
Three Dimensional ◽  
Facial Asymmetry ◽  
Positive Sign ◽  
Growth Spurt ◽  
Facial Landmarks ◽  
Osseous Dysplasia ◽  
Dimensional Measurements ◽  
Post Traumatic ◽  
The Asymmetry ◽  
Serial Observation

Three children suffering from facial asymmetry were observed annually using facial stereophotogrammetry before, during, and after their general skeletal adolescent growth spurt. Stereophotogrammetry allows accurate three-dimensional measurements between identifiable facial landmarks. Five pairs of bilateral parameters connecting external canthi and angles of the mouth to alae and tip of nose, and to each other, allowed a positive sign (right-side larger) or a negative (left-side larger) assessment of parameter asymmetry, Their total, taking sign into account, assessed mid-facial asymmetry. Serial observation showed that: (1) in patient no. 1 suffering from post-traumatic condylar hypoplasia, the facial asymmetry resolved; (2) in patient no. 2 suffering from unilateral facial hypoplasia, the asymmetry, which was severe, reduced with adolescence, but did not resolve; (3) in patient no. 3 suffering from fibro-osseous dysplasia of left maxilla, the asymmetry was reduced by surgery, but the full effects of the surgery were not measurable until over 1 year after operation: subsequently, the asymmetry began to increase again.

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.

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