Abstract #3615

Improving image quality and decreasing SAR with high dielectric constant pad in 3.0T fetal MRI

ZHENGYANG ZHU¹, Xunwen Xue¹, Tang Tang¹, Zengping Lin², Chao Luo³, Ye Li³, Ming Li¹, Chenchen Yan¹, and Bing Zhang¹

¹Department of Radiology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing University, Nanjing, China, ²Central Research Institute, United Imaging Healthcare Group Co., Ltd, Shanghai, China, Shanghai, China, ³Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences Shenzhen, Shenzhen, China

Synopsis

Keywords: Fetal, Artifacts, 3.0T fetal MRI; Specific absorption rate; Image quality; High dielectric constant.

Motivation: At high magnetic field, degraded image quality due to dielectric artifacts and elevated SAR are two main technical challenges in fetal MRI at 3.0T.

Goal(s): To assess the potential of HDC pad in increasing image quality and decreasing SAR in 3.0T fetal MRI.

Approach: Quantitative Image-quality analysis included SNR and CNR. Qualitative analysis was performed by three radiologists with four-point scale to evaluate overall image quality, dielectric artifact and diagnostic confidence. Whole-body total SAR was read on software workstation.

Results: With HDC pad, SNR and CNR was significantly higher while SAR was significantly lower.

Impact: In clinical setting, adding HDC pad can increase overall quantitative and qualitative image quality while reducing dielectric artifact and SAR.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.