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3D MR coronary angiography: optimization of the technique and preliminary results

  • Niek Hendrik Jan Prakken
  • Evert-Jan P.A. Vonken
  • Birgitta K. Velthuis
  • Pieter A.F.M Doevendans
  • Maarten-Jan M. Cramer
Article

Abstract

Objective:

Current clinical full MR angiography with multiple breathhold multiple thin slab acquisition (MTS) is difficult and arduous. This study describes the optimisation of the whole heart free – breathing balanced turbo field echo (B-TFE) protocol. A high-resolution image of the whole heart is produced in less or comparable time to MTS acquisition and allows for reconstruction afterwards to visualise the individual coronary arteries. The scan is easily performed because the volume has to be targeted only once.

Design and setting:

Eighteen healthy adults without a history of cardiovascular disease underwent free-breathing 3D MR angiography with the B-TFE protocol. The whole-heart data set was reformatted in identical orientations in all subjects to visualise the major coronary arteries.

Main outcome measures:

Vessel length, signal and contrast to noise ratio were determined and compared for each vessel.

Results:

Mean visible vessel lengths were 116 mm for the right, 102 mm for the left main and left descending and 76 mm for the left circumflex coronary artery. The average signal to noise ratio was 7.5 and contrast to noise ratio was 4.9. Because of the need for synchronised cardiac and respiratory triggering the coronaries could not be judged in 25% of the subjects.

Conclusions:

The optimised B-TFE protocol had equal judgeability and vessels could be judged over longer contiguous distances compared to earlier implementations of the B-TFE protocol. We conclude whole heart free breathing navigator-gated and slice-tracked 3D coronary MR angiography with use of the adjusted B-TFE protocol is possible, but still suboptimal for clinical use.

Keywords

angiography coronary artery pathology magnetic resonance imaging whole heart 

Abbreviations

3D

three-dimensional

(B-)TFE

balanced turbo field echo

CNR

contrast to noise ratio

CTA

computed tomography angiography

ECG

electrocardiogram

FOV

field of view

LAD

left anterior descending artery

LCx

left circumflex artery

LM

left main coronary artery

MR(I)

magnetic resonance imaging

MRA

magnetic resonance angiography

MTS

multiple thin slab

RCA

right coronary artery

SNR

signal to noise ratio

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Niek Hendrik Jan Prakken
    • 2
    • 1
  • Evert-Jan P.A. Vonken
    • 2
  • Birgitta K. Velthuis
    • 2
  • Pieter A.F.M Doevendans
    • 3
  • Maarten-Jan M. Cramer
    • 4
  1. 1.Department of RadiologyUniversity Medical CenterUtrechtThe Netherlands
  2. 2.Department of RadiologyUniversity Medical CentreUtrechtThe Netherlands
  3. 3.Inter-universitary institute of cardiologyUniversity Medical CentreUtrechtThe Netherlands
  4. 4.Department of CardiologyUniversity Medical CentreUtrechtThe Netherlands

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