# MAGNETIC RESONANCE FLUOROSCOPY

> **NIH NIH R01** · MAYO CLINIC ROCHESTER · 1992 · $230,746

## Abstract

We propose to continue our investigations into "Magnetic Resonance
Fluoroscopy."  During years 04-06 of this grant we integrated ultrashort TR
(<10 msec) data acquisition with high speed reconstruction to demonstrate
realtime MR image formation.  The three major projects proposed for the
next grant period are:

1.  Realtime MR Fluoroscopy.  We will continue our investigations in
continuous high speed realtime MR imaging in three sub-projects:  (a)
Technique Optimization of the data acquisition including a quantitative
study of various tradeoffs, (b) development of Instrumentation for
interactive MRI, and (c) studies of several Applications of MR Fluoroscopy.

As a result of our work in Years 04-06 we have identified two areas of
investigation distinct from but related to MR Fluoroscopy:

2.  Snapshot FLASH MRI.  Rather than use a continuous short TR sequence, we
will append a burst of short TR repetitions to measure the contrast created
by a preparatory pulse sequence such as inversion recovery.  The goal is to
generate diagnostic images with acquisition times less than 1000 msec.
Sub-projects are:  (a) T1-Weighted Imaging, (b) T2-Weighted Imaging, and
(c) Instrumentation.

3.  Intra-Scan Modification of Scan Parameters.  In our investigations in
Years 04-06 we devised the technique of variable echo times.  We will apply
this to standard spin-echo MRI.  This can potentially provide edge
enhancement, improved SNR, or reduced scan time with negligible reduction
in contrast.  Sub-projects are:  (a) Variable Spin-Echo Imaging (VARSE),
and (b) Variable Inversion Recovery Imaging.

## Key facts

- **NIH application ID:** 3175979
- **Project number:** 5R01CA037993-09
- **Recipient organization:** MAYO CLINIC ROCHESTER
- **SAM.gov UEI:** Y2K4F9RPRRG7
- **Principal Investigator:** Stephen J Riederer
- **Activity code:** R01 (R01, R21, SBIR, etc.)
- **Funding institute:** NIH
- **Fiscal year:** 1992
- **Award amount:** $230,746
- **Award type:** 5
- **Project period:** 1984-08-01 → 1994-08-31

## Primary source

NIH RePORTER: https://reporter.nih.gov/project-details/3175979

## Citation

> US National Institutes of Health, RePORTER application 3175979, MAGNETIC RESONANCE FLUOROSCOPY (5R01CA037993-09). Retrieved via MORVS 2026-10-25 from https://api.morvs.ai/grant/nih/3175979. Licensed CC0.

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