Abstract #2361

Pulmonary nodule detection using ultra-short TE (UTE) with a 3D variable-TE stack-of-spirals sequence in a 3T MR-PET scanner

Yu-Sen Huang¹, Mao-Yuan Marine Su¹, Ning Chien¹, Jin-Shing Chen², and Yeun-Chung Chang¹

¹Department of Medical Imaging, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan, ²Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan

Although the 3T MR-PET system has been used clinically for the whole body, PET/CT still has advantages over this technique when evaluating the pulmonary region. Ultrashort TE with 3D variable-TE stack-of-spirals sampling has been used for pulmonary nodule detection in MR examination¹, which allows for shorter scanning times using an undersampling technique in combination with iterative self-consistent parallel imaging reconstruction (SPIRiT). The goal of this study was to investigate the feasibility of this technique for detecting pulmonary nodules in the 3T MR-PET scanner, which has fewer coil elements compared with most other MR-only scanners, to achieve minimum PET attenuation.

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