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Comparison of axial and coronal acquisitions by non-contrast-enhanced renal 3D MR angiography using flow-in

Junji Takahashi1, Yuki Ohmoto-Sekine2, Takashi Yoshida1

  • 1Radiology Department, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan.

Magma (New York, N.Y.)
|December 29, 2019
PubMed
Abstract

Insights

Coronal non-contrast-enhanced renal MRA using Time-SLIP bSSFP offers superior renal artery visualization and contrast compared to axial views. This makes coronal acquisition the preferred method for initial screening.

Area of Science:

  • Radiology
  • Medical Imaging
  • Cardiovascular Imaging

Background:

  • Non-contrast-enhanced renal magnetic resonance angiography (MRA) is crucial for evaluating kidney vasculature.
  • Optimizing image quality in MRA is essential for accurate diagnosis and treatment planning.

Purpose of the Study:

  • To compare image quality between axial and coronal non-contrast-enhanced renal 3D-MRA acquisitions.
  • To evaluate the effectiveness of time-spatial labeling inversion pulse (Time-SLIP) with flow-in balanced steady-state free precession (bSSFP) for renal MRA.

Main Methods:

  • Acquired axial and coronal non-contrast-enhanced 3D-MRA images in 128 subjects using Time-SLIP flow-in bSSFP on a 1.5-T MRI system.
  • Compared source and maximum intensity projection (MIP) images using a four-point scale.
  • Quantitatively assessed vessel-to-background contrast ratios.

Main Results:

  • Coronal acquisitions demonstrated superior image quality and better visualization of renal branches in MIP images compared to axial.
  • Coronal acquisitions showed significantly less motion degradation in source images (p<0.01).
  • Renal artery to background signal contrast was significantly greater in coronal than axial acquisitions (p<0.01).

Conclusions:

  • Coronal acquisition provides superior contrast and persistent visualization of renal arteries in non-contrast-enhanced MRA.
  • Coronal acquisition is recommended as the first-line screening method for renal non-contrast-enhanced MRA using Time-SLIP flow-in bSSFP.
Keywords:
Flow-in techniqueNon-contrast-enhanced MRA: renal arteryRenal MRA screeningTime-spatial labeling inversion pulse (Time-SLIP)

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