2D Ultrasound Validation to Assess the Accuracy of Hip Displacement Measurement: A Phantom Study

2021 ◽  
Author(s):  
Thanh-Tu Pham ◽  
Thanh-Giang La ◽  
Lawrence H. Le ◽  
John Andersen ◽  
Edmond Lou
Keyword(s):  
Phantom Study ◽  
Displacement Measurement ◽  
Hip Displacement ◽  
2D Ultrasound

A Phantom Study Comparing Ultrasound-Guided Liver Tumor Puncture Using New Real-Time 3D Ultrasound and Conventional 2D Ultrasound

2011 ◽  
Vol 196 (6) ◽  
pp. W753-W757 ◽  
Author(s):  
Katsutoshi Sugimoto ◽  
Fuminori Moriyasu ◽  
Junji Shiraishi ◽  
Masahiko Yamada ◽  
Yasuharu Imai
Keyword(s):  
Real Time ◽  
Liver Tumor ◽  
3D Ultrasound ◽  
Phantom Study ◽  
Ultrasound Guided ◽  
2D Ultrasound

Quality control of elastography quantification: a phantom study

2015 ◽  
Vol 53 (08) ◽  
Author(s):  
R Kubale ◽  
T Fuhrmann ◽  
A Arslanow ◽  
F Frenzel ◽  
P Minko ◽  
...  
Keyword(s):  
Quality Control ◽  
Phantom Study

Emission time optimisation for Ga-68-PSMA with a digital PET/CT – a phantom study

2020 ◽  
Author(s):  
PF Costa ◽  
F Süßelbeck ◽  
A Bramer ◽  
M Conti ◽  
M Weber ◽  
...  
Keyword(s):  
Phantom Study ◽  
Pet Ct ◽  
Emission Time ◽  
Digital Pet

The effect of technical factors on hue distribution in elastographic images: a phantom study

2008 ◽  
Vol 29 (S 1) ◽  
Author(s):  
SM Dudea ◽  
C Botar-Jid ◽  
D Dumitriu ◽  
A Ciurea ◽  
A Chiorean ◽  
...  
Keyword(s):  
Phantom Study ◽  
Technical Factors

Laser displacement measurement using intensity modulation with a phase-modulated radio-frequency signal

2020 ◽  
Vol 14 (1) ◽  
pp. 012004
Author(s):  
Yosuke Tanaka ◽  
Kyosuke Yamaguchi ◽  
Kenta Yamamoto ◽  
Yoshiki Yamada
Keyword(s):  
Radio Frequency ◽  
Intensity Modulation ◽  
Displacement Measurement ◽  
Frequency Signal ◽  
Radio Frequency Signal

A pilot study on the effect of ulipristal acetate on myoma angiogenesis, measured by 2D ultrasound and VEGF serum levels

2020 ◽  
pp. 19-29
Author(s):  
Patricia Diaz Ortega ◽  
Manuel García Manero
Keyword(s):  
Pilot Study ◽  
Power Doppler ◽  
Uterine Fibroids ◽  
Premenopausal Women ◽  
Serum Levels ◽  
Ulipristal Acetate ◽  
Before And After ◽  
Angiogenesis Process ◽  
2D Ultrasound ◽  
Average Size

Introduction: Symptomatic uterine fibroids can cause symptoms that can be disabling. There are many treatments, including ulipristal acetate, whose role in reducing symptoms and decreasing the size of the fibroid is well known. With this preliminary study, we also try to evaluate the correlation between myoma vascularization measured by ultrasound (Power Doppler 2D) and serum VEGF levels, before and after treatment with ulipristal acetate; in patients diagnosed with symptomatic uterine fibroids. Materials and Methods: A preliminary, prospective observational pilot study was designed. Twenty-four premenopausal women, diagnosed with symptomatic uterine fibroids, were included and all of them completed the study. Four cycles of ulipristal acetate were administered according to the dose and indications specified in the data sheet. In order to assess the influence of this treatment on the angiogenesis process of the fibroids, measurements of VEGF serum levels were made and their vascularization was assessed by means of 2D power doppler ultrasound; at the beginning and the end of treatment. In addition, several determinations of the same parameters were made throughout the successive visits. Endpoints were defined as the decrease in VEGF levels from previous levels, the decrease in myoma vascularization on ultrasound, and the reduction in myoma size. Result: 24 patients who met the inclusion criteria were enrolled (n=24). The average size of myomas was reduced from 45,08 ? 24,02mm to 29?16,96mm after treatment. The average VEGF serum level significantly decreased after the first treatment cycle (from 147,17 ? 153,51 pg/ml to 102,04 ? 186,08pg/ml). Vascularization of myomas after treatment with ulipristal acetate was analyzed, and a significantly decrease was achieved in 83,3% of cases. Conclusion: There is a correlation between myoma vascularization and treatment with Ulipristal acetate. SPRMs may provide effective treatment for women with symptomatic fibroids by two ways: supports selective progesterone receptor modulators and reduced angiogenesis. Keywords: Angiogenesis; Ulipristal Acetate; Uterine fibroids; VEGF

scholarly journals Influence of iterative reconstruction and dose levels on metallic artifact reduction: A phantom study within four CT systems

2019 ◽  
Vol 100 (5) ◽  
pp. 269-277 ◽  
Author(s):  
J. Greffier ◽  
A. Larbi ◽  
J. Frandon ◽  
P.A. Daviau ◽  
J.P. Beregi ◽  
...  
Keyword(s):  
Iterative Reconstruction ◽  
Phantom Study ◽  
Artifact Reduction ◽  
Metallic Artifact ◽  
Dose Levels

A Design of High-Accuracy Displacement Measurement Instrument from Principles of Optics

2012 ◽  
Vol 170-173 ◽  
pp. 2924-2928
Author(s):  
Sheng Biao Chen ◽  
Yun Zhi Tan
Keyword(s):  
Measurement Instrument ◽  
High Accuracy ◽  
Mechanical Tests ◽  
Total Reflection ◽  
Displacement Measurement ◽  
New Method ◽  
Water Volume ◽  
Water Drainage ◽  
Accuracy Of Measurement ◽  
Better Than

In order to measure the water drainage volume in soil mechanical tests accurately, it develop a new method which is based on principles of optics. And from both physical and mathematic aspects, it deduces the mathematic relationship between micro change in displacement and the increment projected on screen. The result shows that total reflection condition is better than refraction condition. What’s more, the screen could show the water volume micro variation clearly, so it can improve the accuracy of measurement.

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