- Workshop presentation
- Open Access
High-resolution multi-breath-held 3D volumetric T1 mapping acquisition: analysis of volume measurements of small structures using a respiratory motion phantom
© Kawaji et al; licensee BioMed Central Ltd. 2015
- Published: 3 February 2015
- Respiratory Motion
- Gadolinium Concentration
- Conical Vial
- Opposite Sector
- Sector Pair
Myocardial T1 mapping is performed using 8-10mm thick slices; however, this is unsuited for accurate quantification of small structures. We propose a novel 3D-pulse-sequence with improved through-plane spatial resolution. In this study, we use a respiratory motion phantom to compare the accuracy and precision of volume measurements made using this 3D-sequence against a reference 2D-technique.
The proposed 3D-sequence employs a Cartesian projection of radial sectors partitioned by twice the number of total breath-holds. Each opposite sector pair is acquired in a single readout, while k-space center is acquired at the acquisition window midpoint. Partial kz (~62%) and circular shutter Field-of-View (FOV) (~27% reduction) was used to yield ~3x improvement in through-plane resolution.
The proposed high-resolution 3D-T1-mapping acquisition provided improved volumetric measurements compared to the reference 2D approach under various respiratory motion conditions.
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