Calibration of 2D Ultrasound in 3D space for Robotic biopsies

2015 ◽  
Author(s):  
Awais Ahmad ◽  
M. Cenk Cavusoglu ◽  
Ozkan Bebek
Keyword(s):  
3D Space ◽  
2D Ultrasound

scholarly journals Learning to Map 2D Ultrasound Images into 3D Space with Minimal Human Annotation

2021 ◽  
pp. 101998
Author(s):  
Pak-Hei Yeung ◽  
Moska Aliasi ◽  
Aris T. Papageorghiou ◽  
Monique Haak ◽  
Weidi Xie ◽  
...  
Keyword(s):  
Ultrasound Images ◽  
3D Space ◽  
2D Ultrasound

Development and 3D Spatial Calibration of a Parallel Robot for Percutaneous Needle Procedures with 2D Ultrasound Guidance

2017 ◽  
Vol 02 (04) ◽  
pp. 1750007 ◽  
Author(s):  
Awais Ahmad ◽  
S. Orcun Orhan ◽  
Mehmet C. Yildirim ◽  
Ozkan Bebek
Keyword(s):  
Mechanical Design ◽  
Parallel Robot ◽  
Design System ◽  
Medical Interventions ◽  
3D Space ◽  
Volume Of Interest ◽  
2D Ultrasound ◽  
Novel Method ◽  
Friction Models ◽  
Spatial Calibration

Robotic systems are being applied to medical interventions as they increase the operational accuracy. The proposed autonomous and ultrasound guided 5-DOF parallel robot can achieve such accuracy for needle biopsies, which particularly demand precise needle positioning and insertion. In this paper, the robot’s mechanical design, system identifications, and the design of its controller are explained. A torque computed controller with gravity compensation and friction models, yielding a 0.678[Formula: see text]mm RMS position error for the needle tip, was used. A novel method was used for 3D space calibration of the images for detecting the volume of interest in the biopsy procedure by a multipoint crosswire phantom with parallel threads. The calibration technique had a validation RMS error of 0.03[Formula: see text]mm.

Fitts' Law in 3D Space with Coordinated Hand Movements

2012 ◽  
Author(s):  
Xiaolu Zeng ◽  
Alan Hedge ◽  
Francois Guimbretiere
Keyword(s):  
Hand Movements ◽  
Fitts Law ◽  
3D Space

Interacting in 3D Space: Comparison of a 3D Two-handed Interface to a Keyboard-and-mouse Interface for Medical 3D Image Manipulation

2009 ◽  
Author(s):  
F. Jacob Seagull ◽  
Peter Miller ◽  
Ivan George ◽  
Paul Mlyniec ◽  
Adrian Park
Keyword(s):  
Image Manipulation ◽  
3D Image ◽  
3D Space

Charakteristika von Liquorflussartefakten in 3D SPACE IR T1 Datensätzen

2010 ◽  
Vol 182 (S 01) ◽  
Author(s):  
D Flöry ◽  
C Ginthoer ◽  
J Roeper-Kelmayr ◽  
A Doerfler ◽  
WG Bradley ◽  
...  
Keyword(s):  
3D Space

A Study of Clustering for the Enhancement of Image Resolution in Dynamic Photon Emission

2019 ◽  
Author(s):  
S. Chef ◽  
C. T. Chua ◽  
C. L. Gan
Keyword(s):  
Signal To Noise Ratio ◽  
Photon Emission ◽  
Optical Signal ◽  
Image Resolution ◽  
Time Dimension ◽  
Processing Scheme ◽  
3D Space ◽  
Initial Acquisition ◽  
Resolution Limits ◽  
Emission Microscopy

Abstract Limited spatial resolution and low signal to noise ratio are some of the main challenges in optical signal observation, especially for photon emission microscopy. As dynamic emission signals are generated in a 3D space, the use of the time dimension in addition to space enables a better localization of switching events. It can actually be used to infer information with a precision above the resolution limits of the acquired signals. Taking advantage of this property, we report on a post-acquisition processing scheme to generate emission images with a better image resolution than the initial acquisition.

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

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