Keyword search (3,171 papers available)


Automatic collateral circulation scoring in ischemic stroke using 4D CT angiography with low-rank and sparse matrix decomposition.

Author(s): Aktar M, Tampieri D, Rivaz H, Kersten-Oertel M, Xiao Y

Int J Comput Assist Radiol Surg. 2020 Jul 14;: Authors: Aktar M, Tampieri D, Rivaz H, Kersten-Oertel M, Xiao Y

Article GUID: 32662055
Two-stage ultrasound image segmentation using U-Net and test time augmentation.

Author(s): Amiri M; Brooks R; Behboodi B; Rivaz H;

PURPOSE: Detecting breast lesions using ultrasound imaging is an important application of computer-aided diagnosis systems. Several automatic methods have been proposed for breast lesion detection and segmentation; however, due to the ultrasound artefacts, ...

Article GUID: 32350786
MARIN: an open-source mobile augmented reality interactive neuronavigation system.

Author(s): Léger É; Reyes J; Drouin S; Popa T; Hall JA; Collins DL; Kersten-Oertel M;

PURPOSE: Neuronavigation systems making use of augmented reality (AR) have been the focus of much research in the last couple of decades. In recent years, there has been considerable interest in using mobile devices for AR in the operating room (OR). We pro...

Article GUID: 32323206
Cognitive load associations when utilizing auditory display within image-guided neurosurgery.

Author(s): Plazak J, DiGiovanni DA, Collins DL, Kersten-Oertel M

Int J Comput Assist Radiol Surg. 2019 Apr 17;: Authors: Plazak J, DiGiovanni DA, Collins DL, Kersten-Oertel M

Article GUID: 30997635
Deformable registration of preoperative MR, pre-resection ultrasound, and post-resection ultrasound images of neurosurgery.

Author(s): Rivaz H, Collins DL

Int J Comput Assist Radiol Surg. 2015 Jul;10(7):1017-28 Authors: Rivaz H, Collins DL

Article GUID: 25373447
Nonlinear deformation of tractography in ultrasound-guided low-grade gliomas resection.

Author(s): Xiao Y, Eikenes L, Reinertsen I, Rivaz H

Int J Comput Assist Radiol Surg. 2018 Mar;13(3):457-467 Authors: Xiao Y, Eikenes L, Reinertsen I, Rivaz H

Article GUID: 29299739
Correction to: Nonlinear deformation of tractography in ultrasound-guided low-grade gliomas resection.

Author(s): Xiao Y, Eikenes L, Reinertsen I, Rivaz H

Int J Comput Assist Radiol Surg. 2018 03;13(3):469 Authors: Xiao Y, Eikenes L, Reinertsen I, Rivaz H

Article GUID: 29392538
ARENA: Inter-modality affine registration using evolutionary strategy.

Author(s): Masoumi N, Xiao Y, Rivaz H

Int J Comput Assist Radiol Surg. 2019 Mar;14(3):441-450 Authors: Masoumi N, Xiao Y, Rivaz H

Article GUID: 30535826
Title:Nonlinear deformation of tractography in ultrasound-guided low-grade gliomas resection.
Authors:Xiao Y,  Eikenes L,  Reinertsen I,  Rivaz H
Link:https://www.ncbi.nlm.nih.gov/pubmed/29299739?dopt=Abstract
Category:Int J Comput Assist Radiol Surg
PMID:29299739
Dept Affiliation: PERFORM
1 PERFORM Centre, Concordia University, Rm 2.211, 7200 Sherbrooke St. W., Montreal, QC, H4B 1R6, Canada. yiming.xiao@concordia.ca.
2 Department of Electrical and Computer Engineering, Concordia University, Montreal, Canada. yiming.xiao@concordia.ca.
3 Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway.
4 Department of Medical Technology, SINTEF, Trondheim, Norway.
5 Norwegian National Advisory Unit for Ultrasound and Image-Guided Therapy, St. Olavs University Hospital, Trondheim, Norway.
6 PERFORM Centre, Concordia University, Rm 2.211, 7200 Sherbrooke St. W., Montreal, QC, H4B 1R6, Canada.
7 Department of Electrical and Computer Engineering, Concordia University, Montreal, Canada.

Description:

Nonlinear deformation of tractography in ultrasound-guided low-grade gliomas resection.

Int J Comput Assist Radiol Surg. 2018 Mar;13(3):457-467

Authors: Xiao Y, Eikenes L, Reinertsen I, Rivaz H

Abstract

PURPOSE: In brain tumor surgeries, maximum removal of cancerous tissue without compromising normal brain functions can improve the patient's survival rate and therapeutic benefits. To achieve this, diffusion MRI and intra-operative ultrasound (iUS) can be highly instrumental. While diffusion MRI allows the visualization of white matter tracts and helps define the resection plan to best preserve the eloquent areas, iUS can effectively track the brain shift after craniotomy that often renders the pre-surgical plan invalid, ensuring the accuracy and safety of the intervention. Unfortunately, brain shift correction using iUS and automatic registration has never been shown for brain tractography so far despite its rising significance in brain tumor resection.

METHODS: We employed a correlation-ratio-based nonlinear registration algorithm to account for brain shift through MRI-iUS registration and used the recovered deformations to warp both the brain anatomy and tractography seen in pre-surgical plans. The overall technique was demonstrated retrospectively on four patients who underwent iUS-guided low-grade brain gliomas resection.

RESULTS: Through qualitative and quantitative evaluations, the preoperative MRI and iUS scans were well realigned after nonlinear registration, and the deformed brain tumor volumes and white matter tracts showed large displacements away from the pre-surgical plans.

CONCLUSIONS: We are the first to demonstrate the technique to track nonlinear deformation of brain tractography using real clinical MRI and iUS data, and the results confirm the need for updating white matter tracts due to tissue shift during surgery.

PMID: 29299739 [PubMed - indexed for MEDLINE]