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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
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Three-dimensional MR Fingerprinting for Quantitative Breast Imaging.

Yong Chen1, Ananya Panda1, Shivani Pahwa1

  • 1From the Departments of Radiology (Y.C., A.P., S.P., S.D., D.F.M., D.M., J.B., N.S., M.A.G., D.P., V.G.) and Biomedical Engineering (J.I.H., N.S., M.A.G., V.G.), Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106; and Department of Radiology, University Hospitals Cleveland Medical Center, Cleveland, Ohio (Y.C., A.P., S.P., S.D., D.F.M., D.M., J.B., M.A.G., D.P., V.G.).

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Summary
This summary is machine-generated.

A new fast 3D MR fingerprinting method enables simultaneous T1 and T2 quantification for breast imaging. This technique accurately measures relaxation times, differentiating cancerous tissue from healthy tissue.

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Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging
  • Biophysics

Background:

  • Accurate quantification of T1 and T2 relaxation times is crucial for breast imaging.
  • Current methods may lack speed or volumetric capabilities for comprehensive breast tissue analysis.

Purpose of the Study:

  • To develop and validate a rapid, three-dimensional (3D) method for simultaneous T1 and T2 quantification in breast imaging using MR fingerprinting (MRF).

Main Methods:

  • Prospective study employing variable flip angles and magnetization preparation for 3D MRF data acquisition.
  • Fast postprocessing utilizing singular value decomposition for volumetric quantification.
  • Validation in phantoms followed by application in healthy female participants and those with breast cancer.

Main Results:

  • The developed MRF technique achieved accurate volumetric T1 and T2 quantification in phantoms.
  • 3D quantitative maps were acquired in approximately 6 minutes with a spatial resolution of 1.6 × 1.6 × 3 mm³.
  • Invasive ductal carcinoma showed a significantly higher T2 relaxation time (68 msec ± 13) compared to normal breast tissue (46 msec ± 7), P < .001.

Conclusions:

  • A fast, 3D MR fingerprinting method enables simultaneous T1 and T2 quantification for breast imaging.
  • The technique allows for volumetric assessment of relaxation times in breast tissues.
  • This method holds potential for improved characterization of breast pathologies.