Effect of temporal resolution on the estimation of left ventricular function by cardiac MR imaging |
| |
Authors: | Inoue Yusuke Nomura Yukihiro Nakaoka Takashi Watanabe Makoto Kiryu Shigeru Okubo Toshiyuki Ohtomo Kuni |
| |
Institution: | Department of Radiology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. inoueys-tky@umin.ac.jp |
| |
Abstract: | The aim of this study was to investigate the effect of temporal resolution on the estimation of left ventricular (LV) function by cardiac magnetic resonance (MR) imaging using a steady-state free precession (SSFP) sequence. Left ventricular function was assessed by cine MR imaging using a segmented SSFP sequence in 10 healthy volunteers. Views per segment (VPS) were set at 8 and 20, resulting in high and low true temporal resolution, respectively. Irrespective of VPS, images were reconstructed at 40 cardiac phases, providing high apparent temporal resolution. Data were analyzed using 40, 20 and 10 phases to simulate different apparent temporal resolutions. Increasing the cardiac phases used for analysis slightly decreased mean end-systolic volume (ESV) and slightly increased mean ejection fraction (EF). No substantial difference in estimates of end-diastolic volume (EDV) was found between VPSs of 8 and 20. Imaging with a VPS of 20 yielded a larger ESV and smaller EF than imaging with a VPS of 8 when 40 phases were used. In conclusion, low true temporal resolution causes overestimation of ESV and underestimation of EF. Improvement of apparent temporal resolution mildly reduces but does not eliminate the errors caused by low true temporal resolution. |
| |
Keywords: | |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|