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Journal articleAntharam V, Collingwood JF, Bullivant J-P, et al., 2012,
High field magnetic resonance microscopy of the human hippocampus in Alzheimer's disease: Quantitative imaging and correlation with iron
, NeuroImage, Vol: 59, Pages: 1249-1260, ISSN: 1053-8119 -
Journal articleUgarte M, Grime GW, Lord G, et al., 2012,
Concentration of various trace elements in the rat retina and their distribution in different structures
, Metallomics, Vol: 4, Pages: 1245-1245, ISSN: 1756-5901 -
Journal articleDe Luca A, Warboys CM, Amini N, et al., 2012,
IMAGE-BASED COMPUTATIONAL HEMODYNAMICS AND MICROARRAY ANALYSIS OF THE PORCINE AORTIC ARCH REVEALS A CORRELATION BETWEEN SHEAR STRESS AND ENDOTHELIAL CELL APOPTOSIS
, PROCEEDINGS OF THE ASME SUMMER BIOENGINEERING CONFERENCE, PTS A AND B, Pages: 923-924 -
Journal articleGulati A, Davendralingam N, Ferreira P, et al., 2011,
Microvascular Dysfunction Exists in Dilated Cardiomyopathy and Correlates with Disease Severity
, CIRCULATION, Vol: 124, ISSN: 0009-7322 -
Journal articleJabbour A, Ettles C, Ismail T, et al., 2011,
Potential of Pre-Contrast T1 Mapping as a Marker of Interstitial Fibrosis in Severe Aortic Stenosis
, CIRCULATION, Vol: 124, ISSN: 0009-7322 -
Journal articleBangerter NK, Cukur T, Hargreaves BA, et al., 2011,
Three-dimensional fluid-suppressed T2-prep flow-independent peripheral angiography using balanced SSFP
, Magnetic Resonance Imaging, Vol: 29, Pages: 1119-1124, ISSN: 0730-725X -
Conference paperYang G, Hipwell J, Hawkes D, et al., 2011,
Unconstrained simultaneous scheme to fully couple reconstruction and registration for digital breast tomosynthesis: a feasible study
, Medical Image Computing and Computer Assisted Intervention (MICCAI 2011), Publisher: MICCAI, Pages: 25-32Digital breast tomosynthesis (DBT) provides a pseudo-3Dreconstruction which addresses the limitation of superimposition of densefibro-glandular tissue associated with conventional mammography. Reg-istration of temporal DBT volumes searches for the optimum deforma-tion to transform two observed images of the same object into a commonreference frame. This aligns the two images via minimising an objectivefunction that calculates the similarity between the two datasets.In this paper, we present a novel algorithm which combines recon-struction of a pair of temporal DBT acquisitions with their simultaneousregistration. We approach this nonlinear inverse problem using a genericunconstrained optimisation scheme. To evaluate the performance of ourmethod we use 2D and 3D software phantoms and demonstrate that thissimultaneous approach has comparable results to performing these taskssequentially or iteratively w.r.t both the reconstruction fidelity and theregistration accuracy.
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Conference paperYang G, Hipwell J, Tanner C, et al., 2011,
Alternating reconstruction and registration for digital breast tomosynthesis
, UK Radiological Congress 2011, Publisher: The British Institute of Radiology -
Journal articleSoto D, Mok AYF, McRobbie D, et al., 2011,
Biasing visual selection: Functional neuroimaging of the interplay between spatial cueing and feature memory guidance
, NEUROPSYCHOLOGIA, Vol: 49, Pages: 1537-1543, ISSN: 0028-3932- Cite
- Citations: 11
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Journal articleAllen SP, Morrell GR, Peterson B, et al., 2011,
Phase‐sensitive sodium <i>B</i><sub>1</sub> mapping
, Magnetic Resonance in Medicine, Vol: 65, Pages: 1125-1130, ISSN: 0740-3194<jats:title>Abstract</jats:title><jats:p>Quantitative sodium MRI requires accurate knowledge of factors affecting the sodium signal. One important determinant of sodium signal level is the transmit <jats:italic>B</jats:italic><jats:sub>1</jats:sub> field strength. However, the low signal‐to‐noise ratio typical of sodium MRI makes accurate <jats:italic>B</jats:italic><jats:sub>1</jats:sub> mapping in reasonable scan times challenging. A new phase‐sensitive <jats:italic>B</jats:italic><jats:sub>1</jats:sub> mapping technique has recently been shown to work better than the widely used dual‐angle method in low‐signal‐to‐noise ratio situations and over a broader range of flip angles. In this work, the phase‐sensitive <jats:italic>B</jats:italic><jats:sub>1</jats:sub> mapping technique is applied to sodium, and its performance compared to the dual‐angle method through both simulation and phantom studies. The phase‐sensitive method is shown to yield higher quality <jats:italic>B</jats:italic><jats:sub>1</jats:sub> maps at low signal‐to‐noise ratio and greater consistency of measurement than the dual‐angle method. An in vivo sodium <jats:italic>B</jats:italic><jats:sub>1</jats:sub> map of the human breast is also shown, demonstrating the phase‐sensitive method's feasibility for human studies. Magn Reson Med, 2010. © 2010 Wiley‐Liss, Inc.</jats:p>
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For enquiries about the MRI Physics Collective, please contact:
Mary Finnegan
Senior MR Physicist at the Imperial College Healthcare NHS Trust
Pete Lally
Assistant Professor in Magnetic Resonance (MR) Physics at Imperial College
Jan Sedlacik
MR Physicist at the Robert Steiner MR Unit, Hammersmith Hospital Campus