Comparison of the Value of Optimized STIR and IDEAL Fat Suppression Techniques in MRI
of Patients with Metal Implants
LIU Jie1，WANG Chuanbing2，CHEN Xiaoyu3
1. Department of Radiology, Children’s Hospital of Nanjing Medical University, Nanjing Jiangsu 210008, China丨
2. Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Jiangsu 210029, China丨
3. Suzhou GEMMED Medical Equipment Co., Ltd., Zhangjiagang Jiangsu 215625, China
Abstract：Objective To compare the effects of optimized short TI inversion recovery (STIR) and iterative dixon of water-fat with
echo asymmetry and least-squares estimation (IDEAL) fat suppression technique on MRI image quality of metal implants.
Methods Thirty patients requiring MRI examination after lumbar metal fixation were selected for routine,optimized STIR and
IDEAL sequence scan.The signal to noise ratio (SNR) and contrast to noise ratio (CNR) of region of interests signal intensity were
calculated and statistically analyzed. The uniformity of fat inhibition and the size of metal artifact were subjectively evaluated.
Results The SNR of optimized STIR and IDEAL fat suppression methods were: 19.26±0.96, 20.26±1.24 (t=-2.94, P<0.01)丨
The CNR of the images were: 7.03±0.94, 8.28±0.97 (t=-6.07, P<0.01). Subjective scoring uniformity of fat suppression were:
3.47±0.51, 3.63±0.50 (t=1.37, P>0.05)丨 the size of image metal artifacts were: 3.68±0.67, 3.74±0.65 (t=-0.57, P>0.05).
Conclusion IDEAL technology is comparable to STIR fat suppression technology in terms of fat suppression uniformity, metal
artifacts, image signal-to-noise ratio, and results in better SNR and CNR. Therefore, if the machine conditions allows, patients with
metal implants can choose IDEAL fat transplantation technology for examination.
刘杰1，王传兵2，陈晓宇3. 比较优化STIR和IDEAL两种脂肪抑制技术在金属植入物MRI的应用价值[J]. 中国医疗设备, 2021, 36(10): 59-62.
LIU Jie1，WANG Chuanbing2，CHEN Xiaoyu3. Comparison of the Value of Optimized STIR and IDEAL Fat Suppression Techniques in MRI
of Patients with Metal Implants. China Medical Devices, 2021, 36(10): 59-62.
