Journal ArticleDOI
Accelerated dynamic contrast enhanced MRI based on region of interest compressed sensing.
Amaresha Shridhar Konar,Nithin N. Vajuvalli,Rashmi Rao,Divya Jain,D. R. Ramesh Babu,Sairam Geethanath +5 more
TLDR
Both qualitative and quantitative analyses show that ROICS outperforms CS particularly at acceleration factors of 5× and above.About:
This article is published in Magnetic Resonance Imaging.The article was published on 2020-04-01. It has received 11 citations till now.read more
Citations
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Journal ArticleDOI
Low-Field MRI of Stroke: Challenges and Opportunities.
Seema S. Bhat,Tiago T Fernandes,Pavan Poojar,Pavan Poojar,Marta da Silva Ferreira,Padma Chennagiri Rao,M. C. Hanumantharaju,Godwin Ogbole,Rita G. Nunes,Sairam Geethanath,Sairam Geethanath +10 more
TL;DR: It is hypothesize that in the absence of a formal, rapid stroke triaging system, the value of timely on‐site delivery of the scanner to the stroke patient can be significant and suggests a compelling need to explore further the trade‐offs between high signal, contrast, and accessibility at low fields in low‐income communities.
Journal ArticleDOI
Shift invariant extrema based feature analysis scheme to discriminate the spiculation nature of mammograms.
Poulomi Das,Arpita Das +1 more
TL;DR: Experimental results show that extrema characterization reduces the feature redundancy to produce high efficiency in reasonably low time.
Journal ArticleDOI
Diffusion kurtosis imaging and dynamic contrast-enhanced MRI for the differentiation of parotid gland tumors.
TL;DR: In this paper, the authors used diffusion kurtosis imaging (DKI) and dynamic contrastenhanced MRI (DCE-MRI) in the differentiation of parotid gland tumors.
Posted ContentDOI
Tailored Magnetic Resonance Fingerprinting
Pavan Poojar,Enlin Qian,Maggie Fung,P. Quarterman,Sachin Jambawalikar,Angela Lignelli,Sairam Geethanath +6 more
TL;DR: This work designed, simulated, and demonstrated rapid, simultaneous, multi-contrast qualitative and quantitative imaging through the approach of tailored MR fingerprinting (TMRF) to cover whole-brain in approximately four minutes to increase the scan efficiency.
Book ChapterDOI
Quantitative DCE-MRI of the Breast
TL;DR: In this article , a review of pharmacokinetic (PK) models commonly used for analysis of breast dynamic contrast-enhanced (DCE)MRI data, the formulations, and derived PK parameters are presented.
References
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Book
Compressed sensing
TL;DR: It is possible to design n=O(Nlog(m)) nonadaptive measurements allowing reconstruction with accuracy comparable to that attainable with direct knowledge of the N most important coefficients, and a good approximation to those N important coefficients is extracted from the n measurements by solving a linear program-Basis Pursuit in signal processing.
Journal ArticleDOI
Sparse MRI: The application of compressed sensing for rapid MR imaging.
TL;DR: Practical incoherent undersampling schemes are developed and analyzed by means of their aliasing interference and demonstrate improved spatial resolution and accelerated acquisition for multislice fast spin‐echo brain imaging and 3D contrast enhanced angiography.
PatentDOI
SENSE: Sensitivity Encoding for fast MRI
TL;DR: The problem of image reconstruction from sensitivity encoded data is formulated in a general fashion and solved for arbitrary coil configurations and k‐space sampling patterns and special attention is given to the currently most practical case, namely, sampling a common Cartesian grid with reduced density.
Journal ArticleDOI
The use of the L-curve in the regularization of discrete ill-posed problems
TL;DR: A unifying characterization of various regularization methods is given and it is shown that the measurement of “size” is dependent on the particular regularization method chosen, and a new method is proposed for choosing the regularization parameter based on the L-curve.
Journal ArticleDOI
Time-resolved contrast-enhanced 3D MR angiography
TL;DR: An MR angiographic technique, referred to as 3D TRICKS (3D time‐resolved imaging of contrast kinetics) has been developed, which combines and extends to 3D imaging several previously published elements, allowing reconstruction of a series of 3D image sets having an effective temporal frame rate of one volume every 2‐6 s.