Section Thickness required for MR dynamic angiogram

The section thickness should vary depending on the anatomic sites and clinical setting. Image resolution can be increased with zero interpolation, which requires no additional time for data collection. Overlapping sections in which the section spacing is set at half of the section thickness can be obtained by means of through-plane zero interpolation. A spatial resolution of approximately 4–5 mm is sufficient to image the abdominal aorta and iliac arteries, and the section thickness can be set at 8–10 mm with 4–5-mm spacing by using overlapping sections . In contrast, a spatial resolution of 1.5–3.0 mm, which can be obtained when the section thickness is set at 3–6 mm with overlapping sections, is required for imaging the main renal arteries and tibioperoneal arteries and allows clinically useful grading of arterial stenosis or occlusion.

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