The Effects of Breathing Motion on DCE-MRI Images: Phantom Studies Simulating Respiratory Motion to Compare CAIPIRINHA-VIBE, Radial-VIBE, and Conventional VIBE.
10.3348/kjr.2017.18.2.289
- Author:
Chang Kyung LEE
1
;
Nieun SEO
;
Bohyun KIM
;
Jimi HUH
;
Jeong Kon KIM
;
Seung Soo LEE
;
In Seong KIM
;
Dominik NICKEL
;
Kyung Won KIM
Author Information
1. Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea. kyungwon_kim@amc.seoul.kr
- Publication Type:Original Article
- Keywords:
Dynamic contrast-enhanced;
Magnetic resonance imaging;
Phantom study;
Free-breathing;
Respiratory motion;
Parallel imaging technique;
CAIPIRINHA-VIBE
- MeSH:
Acceleration;
Artifacts;
Magnetic Resonance Imaging;
Respiration*;
Signal-To-Noise Ratio
- From:Korean Journal of Radiology
2017;18(2):289-298
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To compare the breathing effects on dynamic contrast-enhanced (DCE)-MRI between controlled aliasing in parallel imaging results in higher acceleration (CAIPIRINHA)-volumetric interpolated breath-hold examination (VIBE), radial VIBE with k-space-weighted image contrast view-sharing (radial-VIBE), and conventional VIBE (c-VIBE) sequences using a dedicated phantom experiment. MATERIALS AND METHODS: We developed a moving platform to simulate breathing motion. We conducted dynamic scanning on a 3T machine (MAGNETOM Skyra, Siemens Healthcare) using CAIPIRINHA-VIBE, radial-VIBE, and c-VIBE for six minutes per sequence. We acquired MRI images of the phantom in both static and moving modes, and we also obtained motion-corrected images for the motion mode. We compared the signal stability and signal-to-noise ratio (SNR) of each sequence according to motion state and used the coefficients of variation (CoV) to determine the degree of signal stability. RESULTS: With motion, CAIPIRINHA-VIBE showed the best image quality, and the motion correction aligned the images very well. The CoV (%) of CAIPIRINHA-VIBE in the moving mode (18.65) decreased significantly after the motion correction (2.56) (p < 0.001). In contrast, c-VIBE showed severe breathing motion artifacts that did not improve after motion correction. For radial-VIBE, the position of the phantom in the images did not change during motion, but streak artifacts significantly degraded image quality, also after motion correction. In addition, SNR increased in both CAIPIRINHA-VIBE (from 3.37 to 9.41, p < 0.001) and radial-VIBE (from 4.3 to 4.96, p < 0.001) after motion correction. CONCLUSION: CAIPIRINHA-VIBE performed best for free-breathing DCE-MRI after motion correction, with excellent image quality.
