Browsing by author "Lee, D"
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Audiovisual Biofeedback Improves Cine-Magnetic Resonance Imaging Measured Lung Tumor Motion Consistency.
Lee, D; Greer, PB; Ludbrook, J; Arm, J; Hunter, P; Pollock, S; Makhija, K; O'Brien, RT; Kim, T; Keall, PPublished 2016-03-01PURPOSE: To assess the impact of an audiovisual (AV) biofeedback on intra- and interfraction tumor motion for lung cancer patients. METHODS AND MATERIALS: Lung tumor motion was investigated in 9 lung cancer patients who ...Open AccessArticle -
Audiovisual biofeedback improves the correlation between internal/external surrogate motion and lung tumor motion.
Lee, D; Greer, PB; Paganelli, C; Ludbrook, JJ; Kim, T; Keall, PPublished 2018-03-01PURPOSE: Breathing management can reduce breath-to-breath (intrafraction) and day-by-day (interfraction) variability in breathing motion while utilizing the respiratory motion of internal and external surrogates for ...Open AccessArticle -
Dynamic keyhole: a novel method to improve MR images in the presence of respiratory motion for real-time MRI
Lee, D; Pollock, S; Whelan, B; Keall, P; Kim, TPublished 2014-07-01PURPOSE: In this work, the authors present a novel magnetic resonance imaging reconstruction method to improve the quality of MR images in the presence of respiratory motion for real-time thoracic image-guided radiotherapy. ...Open AccessArticle -
Feasibility study on 3D image reconstruction from 2D orthogonal cine-MRI for MRI-guided radiotherapy.
Paganelli, C; Lee, D; Kipritidis, J; Whelan, B; Greer, PB; Baroni, G; Riboldi, M; Keall, PPublished 2018-06-01INTRODUCTION: In-room MRI is a promising image guidance strategy in external beam radiotherapy to acquire volumetric information for moving targets. However, limitations in spatio-temporal resolution led several authors ...Open AccessArticle -
Image-based retrospective 4D MRI in external beam radiotherapy: A comparative study with a digital phantom.
Paganelli, C; Kipritidis, J; Lee, D; Baroni, G; Keall, P; Riboldi, MPublished 2018-07-01PURPOSE: Several image-based retrospective sorting methods of 4D magnetic resonance imaging (4D MRI) have been proposed for respiratory motion reconstruction in external beam radiotherapy. However, the optimal strategy for ...Open AccessArticle -
The internal-external respiratory motion correlation is unaffected by audiovisual biofeedback.
Steel, H; Pollock, S; Lee, D; Keall, P; Kim, TPublished 2014-03-01This study evaluated if an audiovisual (AV) biofeedback causes variation in the level of external and internal correlation due to its interactive intervention in natural breathing. The internal (diaphragm) and external ...Open AccessArticle -
Motion prediction in MRI-guided radiotherapy based on interleaved orthogonal cine-MRI.
Seregni, M; Paganelli, C; Lee, D; Greer, PB; Baroni, G; Keall, P; Riboldi, MPublished 2016-01-01In-room cine-MRI guidance can provide non-invasive target localization during radiotherapy treatment. However, in order to cope with finite imaging frequency and system latencies between target localization and dose delivery, ...Open AccessArticle -
Quantification of lung tumor rotation with automated landmark extraction using orthogonal cine MRI images.
Paganelli, C; Lee, D; Greer, PB; Baroni, G; Riboldi, M; Keall, PPublished 2015-09-01The quantification of tumor motion in sites affected by respiratory motion is of primary importance to improve treatment accuracy. To account for motion, different studies analyzed the translational component only, without ...Open AccessArticle -
Quantifying the accuracy of the tumor motion and area as a function of acceleration factor for the simulation of the dynamic keyhole magnetic resonance imaging method
Lee, D; Greer, P; Pollock, S; Kim, T; Keall, PPublished 2016-05-01PURPOSE: The dynamic keyhole is a new MR image reconstruction method for thoracic and abdominal MR imaging. To date, this method has not been investigated with cancer patient magnetic resonance imaging (MRI) data. The ...Open AccessArticle -
A retrospective 4D-MRI based on 2D diaphragm profiles for lung cancer patients.
Lee, D; Kim, S; Palta, J; Lewis, B; Keall, P; Kim, TPublished 2019-06-01INTRODUCTION: 4D-MRI, compared to 4D-CT, provides better soft-tissue contrast for target delineation. However, motion artefacts are often observed due to residual breathing variations. This study is to present a retrospective ...Open AccessArticle -
A ROI-based global motion model established on 4DCT and 2D cine-MRI data for MRI-guidance in radiation therapy.
Garau, N; Via, R; Meschini, G; Lee, D; Keall, P; Riboldi, M; Baroni, G; Paganelli, CPublished 2019-02-05In-room magnetic resonance imaging (MRI) allows the acquisition of fast 2D cine-MRI centered in the tumor for advanced motion management in radiotherapy. To achieve 3D information during treatment, patient-specific motion ...Open AccessArticle
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