Abstract #1397

Improved 3D stack-of-spiral UTE pulmonary imaging at 0.55T using iterative concomitant field and motion corrected reconstruction (iCoMoCo)

Ahsan Javed¹, Rajiv Ramasawmy¹, Joel Moss², Waqas Majeed³, Pan Su³, Thomas Benkert⁴, Himanshu Bhat³, Ashkan Malayeri⁵, and Adrienne E. Campbell-Washburn¹

¹Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States, ²Pulmonary Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States, ³Siemens Medical Solutions USA Inc, Malvern,, PA, United States, ⁴Siemens Healthcare GmbH, Erlangen, Germany, ⁵Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, United States

Synopsis

Lung MRI using a high-performance 0.55T system offers reduced susceptibility artifacts, but high resolution imaging is challenged by low proton density, reduced signal-to-noise ratio, and concomitant-fields. 3D spiral acquisitions can be used for improved efficiency and SNR, at the expense of concomitant field related blurring. We present a self-gated, ultra-short echo time, stack-of-spirals acquisition with an efficient inline iterative reconstruction (<15 min) that incorporates both concomitant-field and motion-correction to enable robust high-resolution lung imaging at 0.55T. Our optimized and efficient imaging method is applied to improve image quality in healthy volunteers, patients with lung nodules, and patients with lymphangioleiomyomatosis (LAM).

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.