scholarly journals Image Overlay Guidance for Needle Insertion in CT Scanner

2005 ◽  
Vol 52 (8) ◽  
pp. 1415-1424 ◽  
Author(s):  
G. Fichtinger ◽  
A. Deguet ◽  
K. Masamune ◽  
E. Balogh ◽  
G.S. Fischer ◽  
...  
Keyword(s):  
Needle Insertion ◽  
Ct Scanner ◽  
Image Overlay

scholarly journals Needle Insertion in CT Scanner with Image Overlay – Cadaver Studies

2004 ◽  
pp. 795-803 ◽  
Author(s):  
Gabor Fichtinger ◽  
Anton Deguet ◽  
Ken Masamune ◽  
Emese Balogh ◽  
Gregory Fischer ◽  
...  
Keyword(s):  
Needle Insertion ◽  
Ct Scanner ◽  
Image Overlay ◽  
Cadaver Studies

MRI image overlay: Application to arthrography needle insertion

2007 ◽  
Vol 12 (1) ◽  
pp. 2-14 ◽  
Author(s):  
Gregory Fischer ◽  
Anton Deguet ◽  
Csaba Csoma ◽  
Russell Taylor ◽  
Laura Fayad ◽  
...  
Keyword(s):  
Needle Insertion ◽  
Image Overlay ◽  
Mri Image

Using Navi-Robot and a CT Scanner to Guide Biopsy Needles

2017 ◽  
Vol 11 (3) ◽  
pp. 450-458 ◽  
Author(s):  
Mario Donnici ◽  
◽  
Giorgia Lupinacci ◽  
Paola Nudo ◽  
Michele Perrelli ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Needle Insertion ◽  
Frame Of Reference ◽  
Ct Scanner ◽  
Desktop Computer ◽  
Six Degrees Of Freedom ◽  
Points Of Interest ◽  
Entry Points ◽  
Needle Entry

Purpose of this study was to control the suitability of Navi-Robot, a robotic system developed by our research group, to guide percutaneous needle placement under computed tomography (CT) in order to achieve lower radiation exposure and a shorter procedure. The system consists of a high precision six-degrees-of-freedom self-balanced arm, able to move both in passive and active modes, which allows the physician an accurate needle-insertion. The target and the needle entry points are selected by the surgeon on a desktop computer, that acquires DICOM images from the CT scan, and that, using software developed for this purpose, detects also the position of at least three radio opaque markers placed on the patient or on the stretcher. Once these data are obtained, a new system of reference is established based on the markers position, obtaining the coordinates of target and entry point in the new frame of reference. Going then to touch the tip of the spheres with the tip of the robot end effector in passive mode, and recording their position, the robot learns where the two points of interest are located in its frame of reference. A first test was performed on a Plexiglas board; the accuracy achieved was measured as the distance between the needle tip and the target. The results of the in vitro experiment showed that the system is able to reach the target with an accuracy of 1.2 mm.

MRI image overlay: Application to arthrography needle insertion

2007 ◽  
Vol 12 (1) ◽  
pp. 2-14 ◽  
Author(s):  
Gregory S. Fischer ◽  
Anton Deguet ◽  
Csaba Csoma ◽  
Russell H. Taylor ◽  
Laura Fayad ◽  
...  
Keyword(s):  
Needle Insertion ◽  
Image Overlay ◽  
Mri Image

Material Identification in Presence of Metal for Baggage Screening

2020 ◽  
Vol 2020 (14) ◽  
pp. 294-1-294-8
Author(s):  
Sandamali Devadithya ◽  
David Castañón
Keyword(s):  
Atomic Number ◽  
Effective Atomic Number ◽  
Simulated Data ◽  
Dual Energy ◽  
Basis Functions ◽  
Total Variation Regularization ◽  
Ct Scanner ◽  
Edge Preserving ◽  
Baggage Screening ◽  
Dual Energy Imaging

Dual-energy imaging has emerged as a superior way to recognize materials in X-ray computed tomography. To estimate material properties such as effective atomic number and density, one often generates images in terms of basis functions. This requires decomposition of the dual-energy sinograms into basis sinograms, and subsequently reconstructing the basis images. However, the presence of metal can distort the reconstructed images. In this paper we investigate how photoelectric and Compton basis functions, and synthesized monochromatic basis (SMB) functions behave in the presence of metal and its effect on estimation of effective atomic number and density. Our results indicate that SMB functions, along with edge-preserving total variation regularization, show promise for improved material estimation in the presence of metal. The results are demonstrated using both simulated data as well as data collected from a dualenergy medical CT scanner.

scholarly journals Haptic Communication to Support Biopsy Procedures Learning in Virtual Environments

2012 ◽  
Vol 21 (4) ◽  
pp. 470-489 ◽  
Author(s):  
Amine Chellali ◽  
Cedric Dumas ◽  
Isabelle Milleville-Pennel
Keyword(s):  
Teaching Method ◽  
Skills Training ◽  
Needle Insertion ◽  
Learning System ◽  
Fine Motor ◽  
Skills Acquisition ◽  
Surgical Skill ◽  
Biopsy Procedure ◽  
Haptic Communication ◽  
Procedure Learning

In interventional radiology, physicians require high haptic sensitivity and fine motor skills development because of the limited real-time visual feedback of the surgical site. The transfer of this type of surgical skill to novices is a challenging issue. This paper presents a study on the design of a biopsy procedure learning system. Our methodology, based on a task-centered design approach, aims to bring out new design rules for virtual learning environments. A new collaborative haptic training paradigm is introduced to support human-haptic interaction in a virtual environment. The interaction paradigm supports haptic communication between two distant users to teach a surgical skill. In order to evaluate this paradigm, a user experiment was conducted. Sixty volunteer medical students participated in the study to assess the influence of the teaching method on their performance in a biopsy procedure task. The results show that to transfer the skills, the combination of haptic communication with verbal and visual communications improves the novices’ performance compared to conventional teaching methods. Furthermore, the results show that, depending on the teaching method, participants developed different needle insertion profiles. We conclude that our interaction paradigm facilitates expert-novice haptic communication and improves skills transfer; and new skills acquisition depends on the availability of different communication channels between experts and novices. Our findings indicate that the traditional fellowship methods in surgery should evolve to an off-patient collaborative environment that will continue to support visual and verbal communication, but also haptic communication, in order to achieve a better and more complete skills training.

In reply to “The novel whole-organ high-definition CT scanner: A promising diagnostic method for coronary stented patients with unfavorable HR”

2019 ◽  
Vol 282 ◽  
pp. 111
Author(s):  
Daniele Andreini ◽  
Edoardo Conte ◽  
Flavia Nicoli ◽  
Alessandra Tanzilli ◽  
Saima Mushtaq
Keyword(s):  
Diagnostic Method ◽  
The Novel ◽  
Ct Scanner ◽  
High Definition
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