A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Filters
MRI reconstruction using real-time motion tracking: A simulation study
2008
2008 42nd Asilomar Conference on Signals, Systems and Computers
Preserved Fulltext
Using a simulated MRI scanner, we compare the different ways to use the motion-tracking data (both retrospectively and prospectively) and compare the reconstruction results to motion compensation using ...
Previous efforts to compensate for patient motion in MRI invariably assume that the patient is motionless for some part of the scan. ...
ACKNOWLEDGMENT The authors thank the Montreal Neurological Institute for the use of their BrainWeb data. ...
doi:10.1109/acssc.2008.5074761
fatcat:kmuyg4lnejezrp4mel54ze6rpq
Accelerating Dynamic Magnetic Resonance Imaging (MRI) for Lung Tumor Tracking Based on Low-Rank Decomposition in the Spatial–Temporal Domain: A Feasibility Study Based on Simulation and Preliminary Prospective Undersampled MRI
2014
International Journal of Radiation Oncology, Biology, Physics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Purpose-To evaluate a low-rank decomposition method to reconstruct down-sampled k-space data for the purpose of tumor tracking. ...
Methods and Materials-Seven retrospective lung cancer patients were included in the simulation study. ...
Acknowledgments The study was supported in part by National Institutes of Health grants R21CA161670 and R21CA144063. ...
doi:10.1016/j.ijrobp.2013.11.217
pmid:24412430
pmcid:PMC3941205
fatcat:fi3id4rdszbcjl6rqhpqui6vgy
MR-based motion correction for cardiac PET parametric imaging: a simulation study
2018
EJNMMI Physics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
"MR-based motion correction for cardiac PET parametric imaging: a simulation study." EJNMMI Physics 5 (1): 3. ...
The aim of this study was to perform a realistic positron emission tomography-magnetic resonance (PET-MR) simulation study using 4D XCAT to evaluate the impact of MR-based motion correction on the estimation ...
Availability of data and materials Please contact the corresponding author, Jinsong Ouyang (ouyang.jinsong@mgh.harvard.edu), for the data used in this manuscript. ...
doi:10.1186/s40658-017-0200-9
pmid:29388075
pmcid:PMC5792384
fatcat:xz2j5twzszaa3kisooib6jch7u
Adapting to the motion of multiple independent targets using multileaf collimator tracking for locally advanced prostate cancer: Proof of principle simulation study
2020
Medical Physics (Lancaster)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
This study developed a multileaf collimator (MLC) tracking algorithm for differential motion adaptation and evaluated it in simulated treatments of locally advanced prostate cancer. ...
The dosimetric error was estimated by calculating the dose delivered to the prostate, lymph nodes, bladder, rectum, and small bowel with a motion-encoded dose reconstruction method. ...
ACKNOWLEDGMENTS The authors acknowledge the support of a Cancer Council NSW Project Grant. PJK acknowledges an Australian Government NHMRC Senior Principal Research Fellowship. ...
doi:10.1002/mp.14572
pmid:33124079
fatcat:iawxxptipnhdbjnl46ywpf4c3i
SMART tracking: Simultaneous anatomical imaging and real-time passive device tracking for MR-guided interventions
2019
Physica medica (Testo stampato)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Note that this fulltext copy is not of the "primary" version of this work. The version it corresponds to is:
2019 pre-print arXiv:1908.10769v1 fatcat:gywt2zezgngqtavvxup7hmoqc4
This study demonstrates a proof of concept of a method for simultaneous anatomical imaging and real-time (SMART) passive device tracking for MR-guided interventions. ...
The average pairwise error between the MRI and CT locations was 0.30 mm for tracking of stationary steel spheres and 0.29 mm during motion. ...
DISCUSSION In this study, we have demonstrated SMART tracking, a passive tracking framework that allows real-time tracking of metal devices in 2D MRI at a rate of 10 updates per second, while also providing ...
doi:10.1016/j.ejmp.2019.07.019
pmid:31515028
fatcat:5okkcgft65hwlk46srv6b2n5ue
Track H
2014
Biomedical Engineering
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
A few installations with a combination of radiotherapy delivery and simultaneous MRI, PET online control during heavy-ion treatment or telerobotic ultrasound systems for realtime detection of target motion ...
In the management of organ motion a 4D-imaging is necessary, realized as 4D-CT or list mode (PET). ...
In cooperation with the Westphalian University of Applied Sciences, we are developing a method for biopsies guided by real-time MRI, where the MR image artefact of the biopsy needle is used for needle ...
doi:10.1515/bmt-2014-5007
pmid:25385892
fatcat:xcjcbtnayvfyzhaaaa4askc5qi
Deep Predictive Motion Tracking in Magnetic Resonance Imaging: Application to Fetal Imaging
[article]
2020
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Other Versions
To help build automatic MRI motion tracking and navigation systems to overcome the limitations of the current process and improve fetal imaging, we have developed a new real time image-based motion tracking ...
Our real-time deep predictive motion tracking technique can be used to assess fetal movements, to guide slice acquisitions, and to build navigation systems for fetal MRI. ...
for use in real-time applications, such as motion tracking for real-time navigation. ...
arXiv:1909.11625v2
fatcat:hpxqe67345arboa5jg6oyqrjhi
A 5D computational phantom for pharmacokinetic simulation studies in dynamic emission tomography
2014
Computerized Medical Imaging and Graphics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Methods: A new 5D anthropomorphic digital phantom was developed based on a generic simulation platform, for accurate parametric imaging simulation studies in emission tomography. ...
The phantom is based on high spatial and temporal information derived from real 4D MR data and a detailed multi-compartmental pharmacokinetic modelling simulator. ...
Similarly, dynamic MRI has also been used to derive the motion information, which is then used in a four-dimensional (4-D) simulation framework [14, 15] . ...
doi:10.1016/j.compmedimag.2014.06.018
pmid:25082066
fatcat:b222ou43nnf4lpzkthmokp27xe
Track O. Image Computing
2016
Biomedical Engineering
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
The images display strong differences depending on the system matrix used. Thus, we studied the influence of the Tikhonov regularization by removing it and using a different reconstruction approach. ...
Images of the phantom were reconstructed with the two different system functions using a Tikhonov regularization scheme with a fixed parameter and a modified Kaczmarz algorithm. ...
The registered time-series was then again used to generate a VT which resulted in a motion reduction in every step. ...
doi:10.1515/bmt-2016-5013
pmid:27682695
fatcat:chpj7omugjbi5pisvul6xjhz7m
Prospective motion correction using tracking coils
2012
Magnetic Resonance in Medicine
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
platform simulating both respiratory and cardiac motion. ...
We developed prospective motion correction techniques for intra-cavity imaging using an array of tracking coils. ...
Acknowledgments This study was supported by NIH P41 RR019703, R01 CA11288, R01 CA111981-01, as well as AHA 10SDG261039. ...
doi:10.1002/mrm.24310
pmid:22565377
pmcid:PMC3416927
fatcat:cg5tevcflnd4ddvp74oy6qbgky
Session 30: Radiation therapy IV – Tracking
2017
Biomedical Engineering
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
An inhomogeneous thorax phantom with four different tumormimicking inlays was used to simulate a lung cancer patient. ...
A comparison study between faster CBCT (18°/s) and conventional, clinical CBCT (3°/s) was performed to evaluate dose exposure and image quality. ...
We developed a 4D dose recalculation workflow to simulate the dose delivered to a moving target volume. ...
doi:10.1515/bmt-2017-5051
fatcat:3dekmkkjrfgkdij5juu4fi33ta
Bone Motion Analysis from Dynamic MRI: Acquisition and Tracking
[chapter]
2004
Lecture Notes in Computer Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
We introduce a tracking algorithm based on 2D/3D registration and a procedure to validate the technique by using both dynamic and sequential MRI. ...
As a case study, we apply this methodology on the human hip joint. ...
We introduce a new technique to track bone motion automatically from real-time dynamic MRI based on the combination of temporal information of dynamic MRI and spatial information of static MRI by 2D/3D ...
doi:10.1007/978-3-540-30136-3_114
fatcat:55u3eep3mve43essieztxom4by
Simultaneous tumor and surrogate motion tracking with dynamic MRI for radiation therapy planning
2018
Physics in Medicine and Biology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
In this study, we propose a method to simultaneously track the lung tumor and external surrogates to evaluate their spatial correlation in a quantitative way using dynamic MRI, which allows real-time acquisition ...
A phase-binned 4D-MRI is first reconstructed from multi-slice MR images using body area as a respiratory surrogate and groupwise registration. ...
Although real-time tumor tracking is not the goal of this study, the computation time can be further reduced by incorporating a motion prediction algorithm (Verma et al 2011) into the tracking and optimizing ...
doi:10.1088/1361-6560/aaa20b
pmid:29243669
pmcid:PMC5788465
fatcat:kbx7ozezlrbxpas6ukephxbzzq
Static compressive tracking
2012
Optics Express
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2016; you can also visit the original URL.
The file type is application/pdf.
Using two amplitude masks and a standard focal plane array, the system captures many projections simultaneously, avoiding the need for time-sequential measurements of a single scene. ...
Scenes with few moving targets on static backgrounds have frame differences that can be reconstructed using sparse signal reconstruction techniques in order to track moving targets. ...
For motion tracking purposes, we classify errors into three categories. ...
doi:10.1364/oe.20.021160
pmid:23037240
fatcat:5yhd75zvpng6jd4hsjm4rjpg7m
Quantifying ITV instabilities arising from 4DCT: a simulation study using patient data
2012
Physics in Medicine and Biology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
These fiducial locations are used in a simulation of a four-slice CT scanner to generate the ITV for 10, 20 and 30 mm diameter model tumours. ...
In this work, we use the locations of gold fiducial markers implanted in lung tumours of eight patients to represent tumour motion. ...
This was a geometric study and image reconstruction was not used. ...
doi:10.1088/0031-9155/57/5/l1
pmid:22343122
pmcid:PMC3358004
fatcat:bhxcoqcavnhihdhkc67tpuxvlq
« Previous
Showing results 1 — 15 out of 8,216 results