Beat Sensor Gating in Action - Application and Experience in Adult Clinical CMR Acquisition.

Abstract

Background: Traditional CMR monitors cardiac rhythm via the vectorcardiogram (VCG) signal. Patient cooperation is necessary for adequate skin preparation and electrode placement, with a high R/T wave ratio crucial for diagnostic cardiac synchronisation. Variations in cardiac electrophysiology or a patient's inability to comply before the CMR commences can challenge VCG gating and lead to suboptimal image quality. Cardiac Gating using Beat sensor technology is achieved via a pilot tone transmitter located within a body coil array. Negating the requirement for electrode positioning on a subject's chest. Method(s): Following application of a coronal beat sensor training acquisition, beat sensor cardiac gating was applied on a 1.5T Siemens Sola scanner in the following 3 cases scanned at our institution, where VCG failed to be the appropriate gating method. Patient 1: 43 yr old male with high T wave amplitude. Patient 2: 76 yr old male with irregular atrial fibrillation (AF). Patient 3: 46 yr old male claustrophobic, post Tetralogy of Fallot repair and additional cognitive impairment. Result(s): Effective application of beat sensor cardiac gating, leading to successful scan acquisition and quality in Patient 1: utilising retrospective steady state free precession (SSFP) cine acquisition. Patient 2: applying prospective (SSFP) cine acquisition. Patient 3: real time, free breathing compressed sense accelerated cine. Conclusion(s): We describe the successful use of Beat sensor cardiac gating producing robust cardiac synchronisation and overcoming shortcomings of traditional VCG gating. Proving that CMR scans can be tolerated and acquired with sufficient quality in patients with high T wave amplitudes, vulnerable patients and those with irregular AF. Author Disclosure: A McGuinness: Nothing to disclose; C Hall: N/A; A Borella: N/A; J Troupis: N/A; S Moir: N/ACopyright © 2024