Image measurement technique on vibration amplitude of ultrasonic horn

2013 ◽  
Author(s):  
Yong-bin Zhang ◽  
Zhi-qun Wu ◽  
Jian-ping Zhu ◽  
Jian-guo He ◽  
Guang-min Liu
Keyword(s):  
Measurement Technique ◽  
Vibration Amplitude ◽  
Image Measurement

scholarly journals Lateral Trochlear Inclination Angle: Measurement via a 2-Image Technique to Reliably Characterize and Quantify Trochlear Dysplasia

2020 ◽  
Vol 8 (10) ◽  
pp. 232596712095841
Author(s):  
Sheeba M. Joseph ◽  
Chris Cheng ◽  
Matthew J. Solomito ◽  
J. Lee Pace
Keyword(s):  
Measurement Technique ◽  
Trochlear Dysplasia ◽  
Intraclass Correlation ◽  
Single Image ◽  
Image Measurement ◽  
Mri Scan ◽  
Morphologic Characteristics ◽  
Mri Scans ◽  
Image Technique ◽  
Dejour Classification

Background: Trochlear dysplasia (TD) is a risk factor for patellar instability (PI). The Dejour classification categorizes TD but has suboptimal reliability. Lateral trochlear inclination (LTI) is a quantitative measurement of trochlear dysplasia on a single axial magnetic resonance imaging (MRI) scan. Hypothesis: A modified LTI measurement technique using 2 different axial MRI scans that reference the most proximal aspect of the trochlear cartilage on 1 image and the fully formed posterior condyles on the second image would be as reliable as and significantly different from the single-image measurement technique for LTI. Further, the 2-image LTI would adequately represent overall proximal trochlear morphologic characteristics. Study Design: Cohort study (diagnosis); Level of evidence, 2. Methods: Patients aged 9 to 18 years treated for PI between 2014 and 2017 were identified. The Dejour classification was radiographically determined. Single-image LTI was measured on a single axial MRI scan at the most proximal aspect of visible trochlear cartilage. A 2-image LTI was measured from 2 separate MRI scans: 1 at the most proximal aspect of trochlear cartilage and the second at the fully formed posterior condyles. This 2-image LTI was repeated at 3 subsequent levels (the first measurement is referred to as LTI-1; repeated measurements are LTI-2, LTI-3, and LTI-4, moving distally). In total, 65 patients met the inclusion criteria, and 30 were randomly selected for reliability analysis. Results: Inter- and intrarater reliability trended toward more variability for single-image LTI (intraclass correlation coefficient [ICC], 0.86 and 0.88, respectively) than for 2-image LTI (ICC, 0.97 and 0.96, respectively). The Dejour classification had lower intra- and interrater reliability (ICC, 0.31 and 0.73, respectively). Average single-image LTI (9.2° ± 12.6°) was greater than average 2-image LTI-1 (4.2° SD ± 11.9°) ( P = .0125). Single-image LTI classified 60% of patients with PI as having TD, whereas the 2-image LTI classified 71% as having TD. The 2-image LTI was able to capture 91% of overall proximal trochlear morphologic characteristics. Conclusion: LTI has higher reliability when performed using a 2-image measurement technique compared with single-image LTI and Dejour classification. The strong correlation between 2-image LTI and average LTI shows that 91% of TD is represented on the most proximal axial image. Because the single-image measurement appears to underestimate dysplasia, previously described thresholds should be reexamined using this 2-image technique to appropriately characterize TD.

Evaluation of volatile behaviour and the volatilization volume of molten salt in DIR-MCFC by using the image measurement technique

2005 ◽  
Vol 145 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Kimihiko Sugiura ◽  
Makoto Yamauchi ◽  
Kazumi Tanimoto ◽  
Yasumasa Yoshitani
Keyword(s):  
Molten Salt ◽  
Measurement Technique ◽  
Image Measurement

An image measurement technique for trajectory and attitude of cargo airdrop

2021 ◽  
Vol 14 (5) ◽  
pp. 465
Author(s):  
Xingguo Zhang ◽  
Binghua Hu ◽  
Xiaodong Ma ◽  
Jing Li
Keyword(s):  
Measurement Technique ◽  
Image Measurement

Aerial image measurement technique for fast evaluation of 193-nm lithography masks

2004 ◽  
Author(s):  
Axel M. Zibold ◽  
Thomas Scheruebl ◽  
Wolfgang Harnisch ◽  
Robert Brunner ◽  
J. Greif
Keyword(s):  
Measurement Technique ◽  
Aerial Image ◽  
Image Measurement ◽  
Fast Evaluation ◽  
193 Nm

Aerial image measurement technique for today's and future 193-nm lithography mask requirements

2004 ◽  
Author(s):  
Axel M. Zibold ◽  
Thomas Scheruebl ◽  
Alexander Menck ◽  
Robert Brunner ◽  
J. Greif
Keyword(s):  
Measurement Technique ◽  
Aerial Image ◽  
Image Measurement ◽  
193 Nm

Multitrait-Multimethod Investigation of a Novel Body Image Measurement Technique

2005 ◽  
Vol 76 (4) ◽  
pp. 407-415 ◽  
Author(s):  
David A. Rowe ◽  
Suzanne M. McDonald ◽  
Matthew T. Mahar ◽  
Thomas D. Raedeke
Keyword(s):  
Body Image ◽  
Measurement Technique ◽  
Image Measurement

A Null Constrained Weight Based on Focused Beam Forming

2014 ◽  
Vol 875-877 ◽  
pp. 2137-2142
Author(s):  
Wei Zhou ◽  
Feng Xu
Keyword(s):  
Real Time ◽  
Measurement Technique ◽  
Beam Forming ◽  
Image Measurement ◽  
Acoustic Image ◽  
First Derivative ◽  
Real Time Simulations ◽  
The Given ◽  
Focused Beam

The performance of acoustic image measurement technique will be affected badly by coherence interference, even unable to get the noise targets image at all. A null weight constrained by zero and first derivative based on focused beam forming is proposed in this paper. The weight can put null on the given positions which are only decided by the interferences positions. The weight also has advantages in high robustness and low computation account which doesnt have to be calculated on real time. Simulations about single and multiple interferences on the condition of different SIR are proposed in the paper. And the results show that the new weight proposed in this paper can get targets image while putting nulls on the coherent interferences position.

Sign in / Sign up

Export Citation Format

Share Document