27 research outputs found

    Average annulus minimum diameter, maximum diameter, aspect ratio, and area for all patients (dotted blue line), subgroup 1 with patients with calcium volume less than 250 mm3 (dashed red line), and subgroup 2 for calcium volume exceeding 250 mm3 (solid green line).

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    <p>Average annulus minimum diameter, maximum diameter, aspect ratio, and area for all patients (dotted blue line), subgroup 1 with patients with calcium volume less than 250 mm3 (dashed red line), and subgroup 2 for calcium volume exceeding 250 mm3 (solid green line).</p

    P-value matrices showing statistically significant difference between all combinations of cardiac cycle phases for annulus minimum diameter, annulus aspect ratio, normalized annulus area, and normalized calcifications volume.

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    <p>P-value matrices showing statistically significant difference between all combinations of cardiac cycle phases for annulus minimum diameter, annulus aspect ratio, normalized annulus area, and normalized calcifications volume.</p

    Average dynamic variation of annulus measurements per cardiac cycle for both subgroups (mildly annulus calcified subgroup (≤ 250 mm3) and severely annulus calcified subgroup (> 250 mm3)).

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    <p>Annulus measurements included are minimum diameter, maximum diameter, annulus aspect ratio, normalized annulus area, normalized calcium volume, annulus area, and calcium volume. P-values for significant subgroup difference for dynamic variation and absolute measurements are shown in the last two rows. Severely annulus calcified subgroup is gray highlighted in the table.</p

    Two examples of the annulus plane refinement (TAVI candidate and Non-calcified aortic valve).

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    <p>Three MPR images and a volume rendering image are shown. The upper frames show the vessel view including the centerline. The bottom left pane shows an image perpendicular to the centerline at the annulus plane. In this frame the three hinge points in red, green, and yellow are shown. The bottom right view shows a 3D rendered view for the aortic root and the centerline.</p

    Tissue TACs of the hypoperfused and healthy tissue in the phantom data.

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    <p>In green is the TAC of the healthy tissue. In red is the TAC of the hypoperfused tissue without arrival delay of contrast agent (the original phantom data). The blue curves are the shifted TACs of the hypoperfused tissue of each individual phantom (n = 7). Each curve has a different amount of time shift (from left to right:1, 3, 5, 7, 9, 11 and 13 seconds), and thus arrival delay of contrast agent, relative to the TAC of the healthy tissue (green). With increasing time shift the proportion of the TAC that is truncated increases.</p

    Summary Maps from original phantom data.

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    <p>CTP summary map for all slice locations resulting from analysis of the original CTP phantom data without arrival delay of contrast agent.</p
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