Keywords: Lung, Lung
Motivation: CT Pulmonary Angiography (CTPA) is the gold standard for rapid PE diagnosis, yet an alternative is needed for patients unsuitable for CTPA. Whole-body 0.55T MR scanners may improve MRI accessibility in high-volume settings and, with reduced B0 inhomogeneity, are promising for lung imaging.
Goal(s): Investigate the detectability of PE by non-contrast MR Angiography at 0.55T
Approach: 3D non-contrast free-breathing T2-weighted Turbo Spin Echo sequence imaged one patient. Two cardiothoracic radiologists evaluated the MRA and CTPA modalities, reporting diagnostic confidence.
Results: High diagnostic confidence and image quality in MRA, rating it comparable to CTPA, with good visualization of pulmonary arteries to the segmental level.
Impact: Whole-body 0.55T MR scanners, with reduced air-tissue interface susceptibility, offer a preliminary promising alternative to CTPA for detecting pulmonary embolism (PE) in patients for whom CTPA is unsuitable, potentially enabling non-contrast PE detection in high-volume clinical settings.
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