Research Topics
| Duan XuSummaryAffiliation: University of California Country: USA Publications
Research Grants
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Detail Information
Publications
Single-shot fast spin-echo diffusion tensor imaging of the brain and spine with head and phased array coils at 1.5 T and 3.0 TDuan Xu
Department of Radiology, University of California, San Francisco CA, USA
Magn Reson Imaging 22:751-9. 2004..The diffusion tensor SSFSE method was also able to assess diffusion abnormalities in a brain stem hemorrhage, unaffected by the spatial distortions that limited conventional EPI acquisition...- Spectroscopic imaging of the brain with phased-array coils at 3.0 TDuan Xu
Joint UCSF UCB Graduate Group in Bioengineering, University of California, San Francisco and Berkeley, CA 94143, USA
Magn Reson Imaging 24:69-74. 2006..The use of low peak power, dual-band spectral-spatial pulses was also investigated for application to 3 T MRSI of the brain using the body coil for radiofrequency excitation and PA coils for signal reception... 
Phased array 3D MR spectroscopic imaging of the brain at 7 TDuan Xu
Joint UCSF UC Berkeley Graduate Group in Bioengineering, University of California, San Francisco and Berkeley, CA 94143, USA
Magn Reson Imaging 26:1201-6. 2008..The new 7 T MRSI sequence was tested in volunteer studies and demonstrated the feasibility of obtaining high-SNR phased-array 3D MRSI from the human brain...
Rapid in vivo musculoskeletal MR with parallel imaging at 7TSuchandrima Banerjee
Radiology, University of California, San Francisco, San Francisco, California 94158, USA
Magn Reson Med 59:655-60. 2008..Robust quantification of bone and cartilage metrics could be derived from accelerated ankle and knee acquisitions. PI can enhance the clinical feasibility of in vivo bone and cartilage HR-MRI for osteoporosis and osteoarthritis at 7T...- 3D sensitivity encoded ellipsoidal MR spectroscopic imaging of gliomas at 3TEsin Ozturk-Isik
Margaret Hart Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA 94158, USA
Magn Reson Imaging 27:1249-57. 2009..The goal of this study was to implement time efficient data acquisition and reconstruction methods for 3D magnetic resonance spectroscopic imaging (MRSI) of gliomas at a field strength of 3T using parallel imaging techniques... - 7T human spine imaging arrays with adjustable inductive decouplingBing Wu
Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA 94158, USA
IEEE Trans Biomed Eng 57:397-403. 2010..Preliminary results of human spine images acquired using the transceiver arrays demonstrate the feasibility of the design for ultrahigh-field MR applications and its robust performance for parallel imaging... - GRAPPA-based susceptibility-weighted imaging of normal volunteers and patients with brain tumor at 7 TJanine M Lupo
Department of Radiology, Surbeck Laboratory of Advanced Imaging, University of California, San Francisco, CA 94158 2532, USA
Magn Reson Imaging 27:480-8. 2009..GRAPPA-based SWI at 7 T revealed regions of microvascularity, hemorrhage and calcification within heterogeneous brain tumors that may aid in characterizing active or necrotic tumor and monitoring treatment effects... - High-resolution phased-array MRI of the human brain at 7 tesla: initial experience in multiple sclerosis patientsMeredith Metcalf
UCSF UC Berkeley Joint Graduate Group in Bioengineering, University of California, San Francisco and Berkeley, CA 94017, USA
J Neuroimaging 20:141-7. 2010..Clear involvement of the GM was observed with improved morphological detail in comparison to imaging at lower-field strength... - High-speed 3T MR spectroscopic imaging of prostate with flyback echo-planar encodingAlbert P Chen
Department of Radiology, University of California at San Francisco, San Francisco, CA 94143, USA
J Magn Reson Imaging 25:1288-92. 2007..The short acquisition time provided by this method reduces the 3T prostate MRI/MRSI exam time, allows longer repetition times, and/or allows the acquisition of additional MR acquisitions within the same exam... - High-resolution intracranial MRA at 7T using autocalibrating parallel imaging: initial experience in vascular disease patientsCornelius Von Morze
Department of Radiology, University of California, San Francisco, CA 94143 2512, USA
Magn Reson Imaging 26:1329-33. 2008..In this study, we applied parallel imaging to 7T TOF MRA studies of normal volunteers and patients with vascular disease, in order to obtain very high resolution (0.12 mm(3)) images within a reasonable scan time... - Feasibility of using hyperpolarized [1-13C]lactate as a substrate for in vivo metabolic 13C MRSI studiesAlbert P Chen
Department of Radiology, University of California, Box 2512, San Francisco, CA 94158 2512, USA
Magn Reson Imaging 26:721-6. 2008..This study also demonstrated the potential value of this hyperpolarized agent to investigate in vivo lactate uptake and metabolism in preclinical animal models... - Extreme premature birth is not associated with impaired development of brain microstructureSonia L Bonifacio
Department of Pediatrics, University of California, San Francisco, CA 94143 0748, USA
J Pediatr 157:726-32.e1. 2010..To assess whether birth at <26 weeks gestation is an important predictor of brain microstructure maturation as determined by using diffusion tensor imaging... - Reduced field-of-view diffusion-weighted imaging of the brain at 7 TCornelius Von Morze
Department of Radiology and Biomedical Imaging, University of California, San Francisco MC 2512, CA 94158 2512, USA
Magn Reson Imaging 28:1541-5. 2010..The new acquisition greatly reduced the level of artifacts in six human subjects (including four patients with early symptoms of dementia)... - In vivo bone and cartilage MRI using fully-balanced steady-state free-precession at 7 teslaRoland Krug
Department of Radiology, University of California, San Francisco, San Francisco, California, USA
Magn Reson Med 58:1294-8. 2007..3) compared with 3T (21.3 +/- 3.3). Bone SNR increased from 11.8 +/- 2.0 to 13.2 +/- 2.5 at the higher field strength. We concluded that there is SNR benefit and great potential for bone and cartilage imaging at higher field strength... - MRI of the spine: image quality and normal-neoplastic bone marrow contrast at 3 T versus 1.5 TJian Zhao
Department of Radiology, University of California, San Francisco, 400 Parnassus Ave, A 367, Box 0628, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 192:873-80. 2009..The objectives of our study were to compare image quality of the spine and visualization of spine abnormalities at 3 T and 1.5 T as well as to evaluate differences in quantitative assessment of normal and neoplastic vertebral bone marrow... - Cerebellar development in the preterm neonate: effect of supratentorial brain injuryEmily W Y Tam
Department of Neurology and Pediatrics, University of California San Francisco, 521 Parnassus Ave, San Francisco, CA 94143, USA
Pediatr Res 66:102-6. 2009..DTI studies may provide an early indicator for cerebellar injury and abnormal cerebellar development in preterm neonates... - Design of cosine modulated very selective suppression pulses for MR spectroscopic imaging at 3TJoseph A Osorio
UCSF UCB Joint Graduate Group in Bioengineering, San Francisco, California 94158 2532, USA
Magn Reson Med 61:533-40. 2009..This provided improved coverage and suppression of unwanted lipid signals with a smaller number of pulses. The use of the improved pulse sequence was validated in volunteer studies, and in clinical 3D MRSI exams of brain tumors... - MR spectroscopy of normative premature newbornsDuan Xu
Department of Radiology and Biomedical Imaging, University of San Francisco, California, USA
J Magn Reson Imaging 33:306-11. 2011..To establish normative metabolite ratios throughout the newborn brain using three-dimensional (3D) MR spectroscopic imaging (MRSI)... - Quantitative analysis of spatial distortions of diffusion techniques at 3TDuan Xu
Department of Radiology and Biomedical Imaging, University of California San Francisco, CA, USA
Magn Reson Imaging 28:451-4. 2010..These methods have confirmed the SSFSE based diffusion method is less distorted than the EPI based one, which is generally accepted through visual inspection... - Partially-parallel, susceptibility-weighted MR imaging of brain vasculature at 7 Tesla using sensitivity encoding and an autocalibrating parallel techniqueJanine M Lupo
University of California San Francisco, CA, USA
Conf Proc IEEE Eng Med Biol Soc 1:747-50. 2006.... - Development and initial evaluation of 7-T q-ball imaging of the human brainPratik Mukherjee
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
Magn Reson Imaging 26:171-80. 2008.... - 3D 1H MRSI of brain tumors at 3.0 Tesla using an eight-channel phased-array head coilJoseph A Osorio
UCSF UCB Joint Graduate Group in Bioengineering, University of California San Francisco, San Francisco, California 94158 2532, USA
J Magn Reson Imaging 26:23-30. 2007..To implement proton magnetic resonance spectroscopic imaging (1H MRSI) at 3 Tesla (3T) using an eight-channel phased-array head coil in a population of brain-tumor patients... - Single-shot fast spin-echo diffusion tensor imaging of the lumbar spine at 1.5 and 3 TJulio Carballido-Gamio
Department of Radiology, University of California San Francisco, CA 94158, USA
Magn Reson Imaging 25:665-70. 2007..Results indicate that DTI-SSFSE is a candidate as a clinical sequence for obtaining diffusion tensor images of the lumbar intervertebral discs with scan times shorter than 4 min... - Pediatric brain injury: can DTI scalars predict functional outcome?Duan Xu
Department of Radiology and Biomedical Imaging, University of California San Francisco, 1 Irving St, AC112, Box 2512, San Francisco, CA 94143, USA
Pediatr Radiol 43:55-9. 2013..Other more complex mathematical models and post-processing uses are also discussed briefly... - Malformations of cortical development: diagnostic accuracy of fetal MR imagingOrit A Glenn
Department of Radiology and Biomedical Imaging, Neuroradiology Section, University of California, San Francisco, 505 Parnassus Ave, Box 0628, San Francisco, CA 94143 0628, USA
Radiology 263:843-55. 2012..To determine the diagnostic accuracy of fetal magnetic resonance (MR) imaging for malformations of cortical development by using postnatal MR imaging as reference standard... - Magnetic resonance spectroscopy imaging of the newborn brain--a technical reviewDuan Xu
Department of Radiology and Biomedical Imaging, Joint UCSF UC Berkeley Graduate Group in Bioengineering, University of California, San Francisco, CA 94158, USA
Semin Perinatol 34:20-7. 2010.... - Design of symmetric-sweep spectral-spatial RF pulses for spectral editingCharles H Cunningham
Department of Electrical Engineering, Stanford University, Stanford, California, USA
Magn Reson Med 52:147-53. 2004..5 T and 3 T. The spectral and spatial spin-echo profiles of the new pulses were measured experimentally. Spectra acquired in phantom experiments showed a well-resolved, edited lactate doublet, with 91% to 93% editing efficiency... - Sequence design for magnetic resonance spectroscopic imaging of prostate cancer at 3 TCharles H Cunningham
Department of Electrical Engineering, Stanford University, California, USA
Magn Reson Med 53:1033-9. 2005..Studies in a human subject verified that this behavior is reproduced in vivo and demonstrated that the water and lipid suppression of the new pulse sequence are sufficient for application in prostate cancer patients... - Design of flyback echo-planar readout gradients for magnetic resonance spectroscopic imagingCharles H Cunningham
Department of Electrical Engineering, Stanford University, Stanford, California, USA
Magn Reson Med 54:1286-9. 2005..3 min and 4096 voxels in 8.5 min). The trajectories were insensitive to errors in timing and require only a modest (10 to 30%) penalty in SNR relative to conventional phase encoding using the same acquisition time... - High-resolution 3D MR spectroscopic imaging of the prostate at 3 T with the MLEV-PRESS sequenceAlbert P Chen
Department of Radiology, University of California at San Francisco, San Francisco, CA 94143-2512, USA
Magn Reson Imaging 24:825-32. 2006..5 t mrsi... - Considerations in applying 3D PRESS H-1 brain MRSI with an eight-channel phased-array coil at 3 TYan Li
UCSF/UCB Joint Graduate Group in Bioengineering, San Francisco, CA 94720, USA
Magn Reson Imaging 24:1295-302. 2006..5 T with a quadrature head coil. This is expected to be critical for clinical applications of MRSI in patients with brain tumors because it can be used to either decrease acquisition time or improve spatial resolution... - Abnormal brain development in newborns with congenital heart diseaseSteven P Miller
Department of Neurology, University of California at San Francisco, San Francisco, USA
N Engl J Med 357:1928-38. 2007..We characterized brain metabolism and microstructure, as measures of brain maturation, in newborns with congenital heart disease before they underwent heart surgery... - Development of a robust method for generating 7.0 T multichannel phase images of the brain with application to normal volunteers and patients with neurological diseasesKathryn E Hammond
University of California San Francisco Berkeley Joint Graduate Group in Bioengineering, San Francisco, CA 94158 2532, USA
Neuroimage 39:1682-92. 2008..5 T. The clinical images showed novel contrast in MS plaques and depicted microhemorrhages and abnormal vasculature in brain tumors with unsurpassed resolution and contrast... - Pulse sequence for dynamic volumetric imaging of hyperpolarized metabolic productsCharles H Cunningham
Department of Medical Biophysics and Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ont, Canada M4N 3M5
J Magn Reson 193:139-46. 2008..5s. This high frame rate was used to measure the different lactate dynamics in different tissues in a normal rat model and a mouse model of prostate cancer... - Q-ball reconstruction of multimodal fiber orientations using the spherical harmonic basisChristopher P Hess
Department of Radiology, University of California-San Francisco, San Francisco, California 94143-0628, USA
Magn Reson Med 56:104-17. 2006..In vivo results from 3T whole-brain HARDI of adult volunteers are also provided to verify the underlying mathematical theory... - Intracranial time-of-flight MR angiography at 7T with comparison to 3TCornelius Von Morze
Department of Radiology, UCSF, San Francisco, California, USA
J Magn Reson Imaging 26:900-4. 2007..To establish the feasibility of intracranial time-of-flight (TOF) MR angiography (MRA) at 7T using phased array coils and to compare its performance to 3T...
Research Grants
- Development of Advanced Techniques for MR of the Newborn BrainDuan Xu; Fiscal Year: 2009....