Friday Physics Forum

What is FPF? Faculty, post-docs, and students meet on a bi-weekly basis to discuss the physics of magnetic resonance imaging. This Friday afternoon discussion takes the form of a journal club, informal discussion, or presentation by a team member on a specific topic. We use this opportunity to build upon what we already know about MRI and to augment our understanding about new and emerging topics.

Who comes to FPF? All members of the UCLA community and our off-campus colleagues are welcome to join.

When and where is it held? Every other Wednesday afternoon on Zoom meetings.


Previous 2018/2019 Friday Physics Forums:

Mar 8, 2019 - Xinzhou Li, "MRI Powered Robotics using Gradient Coil and Pulse Sequence for Actuator Tracking"

Nov 16, 2018 - Mark Bydder, "Fast Fourier Transform"

May 10, 2018 - Vahid, "Particle Swarm Optimization"

Apr 26, 2018 - Xingfeng Shao, "Measuring human placental blood flow with multi-delay 3D GRASE pseudo-continuous arterial spin labeling at 3 Tesla"

Apr 6, 2018 - Jiaxin Shao, "Myocardial T1 mapping techniques: accuracy and precision"

Mar 15, 2018 - Xinzhou Li, "Fast Catheter Segmentation From Echocardiographic Sequences Based on Segmentation From Corresponding X-Ray Fluroscopy for Cardiac Catheterization Interventions"

Feb 15, 2018 - David Woodworth, "More accurate estimation of diffusion tensor parameters using diffusion Kurtosis imaging"

Jan 19, 2018 - Michael Loecher, "Shinnar-Le Roux method for designing RF pulses"

Previous 2017 Friday Physics Forums:

Oct 13, 2017 - Thomas Martin, TBD

Sep 15, 2017 — Fadil Ali "Robust 4D Flow Denoising Using Divergence-Free Wavelet Transform"

Sep   1, 2017 — Xinzhou Li "ARFI-Prepared MRgHIFU in Liver: Simultaneous Mapping of ARFI-Displacement and Temperature Elevation, Using a Fast GRE-EPI Sequence"

Aug 18, 2017 — Yu Gao "Decoding Tumor Phenotype by Noninvasive Imaging Using a Quantitative Radiomics Approach"

Aug   4, 2017 — Zhaohuan Zhang "Changes in Epithelium, Stroma, and Lumen Space Correlate More Strongly with Gleason Pattern and Are Stronger Predictors of Prostate ADC Changes than Cellularity Metrics"

July 21, 2017 — Jiahao Lin "A neural approach to relational reasoning"

         "A simple neural network module for relational reasoning"

         "Visual Interaction Networks"

June 23, 2017— Jessica Martinez  "The Physics of MRI Safety"

June   9, 2017— Eugenio Ley-Koo, Mexico National Autonomous University  (Special Seminar)

                           "The Design of Constant Gradient Magnetic Induction Fields"

May 26, 2017 — Da Wang  "Phase Reconstruction from Multiple Coil Data Using a Virtual Reference Coil"

May 12, 2017 — Patrick Magrath  "Measuring Cardiac Function with cine DENSE MRI"


Previous 2016 Friday Physics Forums: 

July 29, 2016 — Tess Armstrong

July 15, 2016 — Mike Loecher

July 1, 2016 — Fei (Felix) Han

June 17, 2016 — Xinran Zhong

Separation of Cellular and BOLD Contributions to T2* Signal Relaxation

June 3, 2016 — MRRL Quarterly Research Seminar

May 20, 2016 — NO FPF (post-ISMRM)

May 6, 2016 — NO FPF (ISMRM)

April 22, 2016 — Andres Saucedo

Low-Rank Plus Sparse Matrix Decomposition for Accelerated Dynamic MRI with Separation of Background and Dynamic Components

April 8, 2016 — Wotao Yin

— Theory and Applications of Asynchronous Parallel Computing

March 4, 2016 — Jiaxin Shao

Characterization of T1 bias in skeletal muscle from fat in MOLLI and SASHA pulse sequences: Quantitative fat-fraction imaging with T1 mapping

February 19, 2016 — Yu Gao

High resolution 3D diffusion cardiovascular magnetic resonance of carotid vessel wall to detect lipid core without contrast media.

February 5, 2016 — Samantha Mikaiel

Optimized 3D ultrashort echo time pulmonary MRI

January 15, 2016 — Thomas Martin

Respiratory Motion-Compensated Radial DynamicContrast-Enhanced (DCE)-MRI of Chest and Abdominal Lesions

Previous 2015 Friday Physics Forums

December 18, 2015 — Yi Wang

SENSE and Simultaneous Multislice Imaging

December 4, 2015 — Xinzhou Li

Kalman Filtering for Real-Time Navigator Processing

November 20, 2015 — Ziwu Zhou

XD-GRASP: Golden-angle radial MRI with reconstruction of extra motion-state dimensions using compressed sensing

October 23, 2015 — Luigi Perotti

Noninvasive Measurement of Time-Varying Three-Dimensional Relative Pressure Fields Within the Human Heart

Topic: Multislice Imaging

July 10th: Review on Multislice Imaging — Thomas

Controlled Aliasing in Parallel Imaging Results in Higher Acceleration (CAIPIRINHA) for Multi-Slice Imaging

July 24th: Methodological paper on Multislice Imaging — Richard

Improvements in multi-slice parallel imaging using radial CAIPIRINHA

Aug 7th: State-of-the-art paper on Multislice Imaging — Yi

Wave-CAIPI for highly accelerated 3D imaging

Aug 21st: Clinical applications of Multislice Imaging — Da

Clinical evaluation of CAIPIRINHA: Comparison against a GRAPPA standard

Topic: Perfusion

May 1st: Review on Perfusion MRI including ASL and DSC — Lirong

Measuring Cerebral Blood Flow Using Magnetic Resonance Imaging Techniques

May 22nd: Arterial Spin Labeling: applications in basic and clinical research. — Kay

June 12th: No Friday Physics (post ISMRM recovery)

June 26th: State-of-the-art paper on DCE — Xinran

High-spatial and high-temporal resolution dynamic contrast-enhanced perfusion imaging of the liver with time-resolved three-dimensional radial MRI.

Topic: Diffusion

Mar 6th: Review on diffusion — Novena Part I

Mar 20th: Review on diffusion — Novena Part II

Apr 3rd: State-of-the-art paper on diffusion — Eric

Separation of diffusion and perfusion in intravoxel incoherent motion MR imaging

Apr 17th: Clinical applications of diffusion — Andres

Topic: Relaxometry

Jan 9th: Review on relaxometry — Jiaxin

General Relaxation (note: password required to view)

Cardiac Relaxation (note: password required to view)

Relaxation, basic knowledge (note: password required to view)

On the accuracy of T1 mapping: Searching for common ground

Jan 23rd: Methodological paper on relaxometry — Richard

Simultaneous three-dimensional myocardial T1 and T2 mapping in one breath hold with 3D-QALAS

Interleaved T1 and T2 Relaxation Time Mapping for Cardiac Applications

3D-QALAS (note: password required to view)

Feb 6th: State-of-the-art paper on relaxometry — Junfei

Myocardial T2 Mapping with respiratory navigator and automatic nonrigid motion correction

Feb 20th: Clinical applications of relaxometry — Shams

Triple-echo steady-state T2 relaxometry of the human brain at high to ultra-high fields

Triple echo steady-state (TESS) relaxometry

Previous 2014 Friday Physics Forums:

Topic: Motion Correction

Oct 31 (Halloween): Review on motion correction — Isabel

Chris Hardy, ISMRM 2014 Educational Session (note: password required to view)

Nov 14: Methodological paper on motion correction — Wasil

Motion Correction With PROPELLER MRI: Application to Head Motion and Free-Breathing Cardiac Imaging

Nov 28: Thanksgiving break

Dec 12: State-of-the-art paper on motion correction — Felix

Nonrigid motion correction in 3D using autofocusing with localized linear translations

Whole-heart coronary MRA with 100% respiratory gating efficiency: Self-navigated three-dimensional retrospective image-based motion correction (TRIM)

Oct 17th, 2014 — Samantha

MR-Guided Prostate Interventions

Sept 19th, 2014 — Zhe

Parallel MRI With Extended and Averaged GRAPPA Kernels (PEAK-GRAPPA): Optimized Spatiotemporal Dynamic Imaging

Sept 5th, 2014 — Thomas

An Optimal Radial Profile Order Based on the Golden Ratio for Time-Resolved MRI

Aug 22nd, 2014 — Robert

Independent component analysis applied to diffusion tensor MRI.

Defining a local arterial input function for perfusion MRI using independent component analysis.

Removing undersampling artifacts in DCE-MRI studies using independent components analysis.

Aug 8th, 2014 — Eric

Breathhold multiecho fast spin-echo pulse sequence for accurate R2 measurement in the heart and liver.

Development of a novel optimized breathhold technique for myocardial T2 measurement in thalassemia.

July 25th, 2014 — Novena

A new design and rationale for 3D orthogonally oversampled k-space trajectories

July 11th, 2014 — Andres

Low-rank approximations for dynamic imaging

June 27th, 2014 — Tess

Projection Reconstruction Techniques for Reduction of Motion Effects in MRI

June 13th, 2014 — Jiaxin

Accelerated and navigator-gated look-locker imaging for cardiac T1 estimation (ANGIE): Development and application to T1 mapping of the right ventricle

May 30th, 2014 — ISMRM Recap (all)

— selected abstracts

May 2nd, 2014 — ISMRM Practice Talks

— Lirong, Stan, Taka

April 18th, 2014 — Ziwu

SPIRiT: Iterative self-consistent parallel imaging reconstruction from arbitrary k-space and

ESPIRiT—an eigenvalue approach to autocalibrating parallel MRI: Where SENSE meets GRAPPA

April 4th, 2014 — Yi Wang

–“Blipped-controlled aliasing in parallel imaging for simultaneous multislice echo planar imaging with reduced g-factor penalty”

March 21st, 2014 — Da Wang

–“Sensitivity profiles from an array of coils for encoding and reconstruction in parallel (SPACE RIP)”

March 7th, 2014 — Shams Rashid

–“Simultaneous acquisition of image and navigator slices using CAIPIRINHA for 4D MRI”

February 21st, 2014 — Mayank Jog

–“SMASH, SENSE, PILS, GRAPPA: how to choose the optimal method.”

February 7th, 2014 — Thomas Martin

–“Simultaneous acquisition of spatial harmonics (SMASH): fast imaging with radiofrequency coil arrays.”

January 24th, 2014 — Stan Rapacchi

–“In vivo chronic myocardial infarction characterization by spin locked cardiovascular magnetic resonance”

January 10th, 2014 — Isabel Dregely

–“A new steady-state imaging sequence for simultaneous acquisition of two MR images with clearly different contrasts.”

Previous 2013 Friday Physics Forums:

December 13th, 2013 — Zhe Wang

–“Actual flip-angle imaging in the pulsed steady state: a method for rapid three-dimensional mapping of the transmitted radiofrequency field.”

November 29th, 2013 — No FPF this week. Happy Thanksgiving!

November 15th, 2013 presented by Jin Gahm

–“Cardiac Fiber Inpainting Using Cartan Forms.”

November 1st, 2013 presented by Robert Smith

–“Travelling-wave nuclear magnetic resonance.”

October 18th, 2013 presented by Suba Srinivasan

–“Rapid combined T1 and T2 mapping using gradient recalled acquisition in the steady state.”

October 4th, 2013 presented by Eric Aliotta

–“Accelerated multi-shot diffusion imaging.”

September 20th, 2013

No FPF this week due the pulse sequence programming course.

September 6th, 2013 presented by Felix Han & Tess Armstrong

–“Dixon techniques for water and fat imaging”


–“Fat and water magnetic resonance imaging”

August 23rd, 2013 presented by Shams Rashid

— “Water-fat separation imaging of the heart with standard magnetic resonance bSSFP CINE imaging.”

August 9th, 2013 presented by Lirong Yan

— “CAIPIRINHA accelerated SSFP imaging.”

July 26th, 2013 presented by Jiaxin Shao

— “T1 measurements in the human myocardium: The effects of magnetization transfer on the SASHA and MOLLI sequences.”

July 12th, 2013 presented by Robert Smith

— “Time-resolved angiography: Past, present, and future.”

June 28th, 2013 presented by Matthew Middione

— “Multidirectional High-Moment Encoding in PC-MRI.”

June 14th, 2013 presented by Subashini Srinivasan

— “T-one insensitive steady state imaging: a framework for purely T2-weighted TrueFISP.”

May 31st, 2013 presented by Zhe Wang

— “Controlled Aliasing in Parallel Imaging Results in Higher Acceleration (CAIPIRINHA) for Multi-Slice Imaging.”

May 17th, 2013 presented by Jin Gahm

— “In vivo human cardiac fibre architecture estimation using shape-based diffusion tensor processing.”

May 31st, 2013 — No Meeting.

May 13th, 2013 presented by David Sosnovik (Invited Speaker)

“Can We Solve the Motion Challenge in Cardiac MRI?”

— Special Room Location: 300 Medical Plaza, Room B500

May 3rd, 2013 presented by Eric Wong (Invited Speaker)

“New Development of Arterial Spin Labeling – CBF, vascular territories, and OEF”

— Special Room Location: Ahmanson-Lovelace Brain Mapping Center, 2nd Floor Conference Room

April 19th, 2013 presented by Jiaxin Shao

“Multiple 3D Inversion Recovery Imaging for Volume T1 Mapping of the Heart”

April 5th, 2013 presented by Felix Han

“Magnetic Resonance Fingerprinting”

March 22nd, 2013 presented by David Yerushalmi (Invited Speaker)

“A Parameter Optimization-based Model for Small Lesion Activity Quantification In PET-CT Images”

March 8th, 2013 presented by Yan Lirong

“Nontriggered MRI quantification of aortic pulse-wave velocity”

February 22, 2013 presented by Yi Wang

“Non-contrast-enhanced renal and abdominal MR angiography using velocity-selective inversion preparation”

February 8th, 2013 presented by Geoff Kung

“PCATMIP: enhancing signal intensity in diffusion-weighted magnetic resonance imaging”

January 25th, 2013 presented by Meral Reyhan

“In vivo measurement of gadolinium diffusivity by dynamic contrast-enhanced MRI: A preclinical study of human xenografts”

January 4th, 2013 presented by Stan Rapacchi

“Arrhythmia insensitive rapid cardiac T1 mapping pulse sequence”

Friday Physics Forum (October 5th, 2012). Friday Physics Forum (August 24th, 2012). Friday Physics Forum (October 19th, 2012).