Quantification of the Regional Properties of Gastric Motility Using Dynamic Magnetic Resonance Images

oleh: Saeed Hosseini, Recep Avci, Niranchan Paskaranandavadivel, Vinod Suresh, Leo K. Cheng

Format: Article
Diterbitkan: IEEE 2023-01-01

Deskripsi

<italic>Goal</italic>: To quantify the regional properties of gastric motility from free-breathing dynamic MRI data. <italic>Methods</italic>: Free-breathing MRI scans were performed on 10 healthy human subjects. Motion correction was applied to reduce the respiratory effect. A stomach centerline was automatically generated and used as a reference axis. Contractions were quantified and visualized as spatio-temporal contraction maps. Gastric motility properties were reported separately for the lesser and greater curvatures in the proximal and distal regions of the stomach. <italic>Results</italic>: Motility properties varied in different regions of the stomach. The mean contraction frequencies for the lesser and greater curvatures were both 3.1&#x00B1;0.4 cycles per minute. The contraction speed was significantly higher on the greater curvature than the lesser curvature (3.5&#x00B1;0.7 vs 2.5&#x00B1;0.4 mm&#x002F;s, p&lt;0.001) while contraction size on both curvatures was comparable (4.9&#x00B1;1.2 vs 5.7&#x00B1;2.4 mm, p &#x003D; 0.326). The mean gastric motility index was significantly higher in the distal greater curvature (28.13&#x00B1;18.89 mm<sup>2</sup>&#x002F;s) compared to the other regions of the stomach (11.16&#x2013;14.12 mm<sup>2</sup>&#x002F;s). <italic>Conclusions</italic>: The results showed the effectiveness of the proposed method for visualization and quantification of motility patterns from MRI data.