Ricardo Otazo

Biosketch / Results /

Jose Otazo-Torres

Assistant Professor, Department of Radiology

Contact Info

660 First Avenue
New York, NY 10016



2000-2001 — Institute, Bariloche, Argentina, Internship

Research Summary

Imaging speed is of critical importance in many clinical applications of magnetic resonance imaging. Cardiac imaging, for example, must contend with the challenges of cardiac motion, respiratory motion, and blood flow. Parallel imaging (PI) is a well-established technique to accelerate the data acquisition in MRI, by using arrays of radiofrequency receiver coils that provide the additional encoding capabilities needed to reconstruct an image from undersampled datasets. Another approach for accelerated imaging is the application of compressed sensing (CS), which was recently introduced into the MRI field to exploit the compressibility of biomedical images. Instead of acquiring the fully-sampled image and compressing it afterwards (standard compression), CS applies the fact than an image is usually sparse under an appropriate basis and reconstructs this sparse representation from undersampled data. In this project, a combination of compressed sensing and parallel imaging is developed to achieve previously inaccessible combinations of temporal resolution, spatial resolution and spatial coverage.

Research Interests

Accelerated magnetic resonance imaging, compressed sensing, parallel imaging, image reconstruction algorithms, cardiac imaging

Complex difference constrained compressed sensing reconstruction for accelerated PRF thermometry with application to MRI-induced RF heating
Cao, Zhipeng; Oh, Sukhoon; Otazo, Ricardo; Sica, Christopher T; Griswold, Mark A; Collins, Christopher M
2015-04-10; 1522-2594,Magnetic resonance in medicine - id: 1522922, year: 2015 Journal Article

Respiratory Motion-Resolved Compressed Sensing Reconstruction of Free-Breathing Radial Acquisition for Dynamic Liver Magnetic Resonance Imaging
Chandarana, Hersh; Feng, Li; Ream, Justin; Wang, Annie; Babb, James S; Block, Kai Tobias; Sodickson, Daniel K; Otazo, Ricardo
2015-07-13; 1536-0210,Investigative radiology - id: 1662582, year: 2015 JOURNAL ARTICLE

XD-GRASP: Golden-angle radial MRI with reconstruction of extra motion-state dimensions using compressed sensing
Feng, Li; Axel, Leon; Chandarana, Hersh; Block, Kai Tobias; Sodickson, Daniel K; Otazo, Ricardo
2015-03-30; 1522-2594,Magnetic resonance in medicine - id: 1514172, year: 2015 JOURNAL ARTICLE

Influence of temporal regularization and radial undersampling factor on compressed sensing reconstruction in dynamic contrast enhanced MRI of the breast
Kim, Sungheon G; Feng, Li; Grimm, Robert; Freed, Melanie; Block, Kai Tobias; Sodickson, Daniel K; Moy, Linda; Otazo, Ricardo
2015-06-07; 1522-2586,Journal of magnetic resonance imaging - id: 1615322, year: 2015 JOURNAL ARTICLE

A model-based reconstruction for undersampled radial spin-echo DTI with variational penalties on the diffusion tensor
Knoll, Florian; Raya, Jose G; Halloran, Rafael O; Baete, Steven; Sigmund, Eric; Bammer, Roland; Block, Tobias; Otazo, Ricardo; Sodickson, Daniel K
2015-01-19; 0952-3480,NMR in biomedicine - id: 1436482, year: 2015 JOURNAL ARTICLE