iREACT: A Non-contrast Non-triggered MR Angiography Technique with Reduced RF Deposition

Prashant Prabhakaran Nair, Masami Yoneyama, Rajagopal Kadavigere, Shashank Sathyanarayana Hegde

Research output: Contribution to journalArticlepeer-review


Relaxation enhanced angiography without contrast and triggering (REACT) is a non-contrast-enhanced angiography technique that highlights blood and suppresses the low T2 and T1 background tissues by using a combination of T2prep and inversion modules, respectively. In this work, the T2prep module is modified to effectively perform both T2prep and inversion. This eliminates the need for a separate inversion pulse. The modified sequence (iREACT) is compared with REACT through a subjective evaluation based on blood vessel delineation, muscle and fat suppression efficacy. Further an objective analysis was performed for these parameters by measuring the blood-muscle and water-fat contrast ratios. iREACT shows comparable suppression of muscle and delineation of blood vessels whereas fat suppression efficacy is reduced at tissue boundaries and the edge of larger field of views. Efficient background suppression is achieved with a reduced RF load. This is a step towards safe and easy non-contrast MR angiography.

Original languageEnglish
Pages (from-to)335-342
Number of pages8
JournalApplied Magnetic Resonance
Issue number2
Publication statusPublished - 02-2022

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'iREACT: A Non-contrast Non-triggered MR Angiography Technique with Reduced RF Deposition'. Together they form a unique fingerprint.

Cite this