Key result
4D straightened segmentation demonstrated comparable accuracy and efficacy to anatomical segmentation for measuring the landing zone prior to transcatheter pulmonary valve replacement.
Why the study?
Incorrect RVOT evaluation on C-CTA prior to TPVR can make the procedure challenging and lead to device-related complications, requiring evaluation of 4D straightened segmentation feasibility and accuracy.
Does 4D straightened segmentation provide accurate measurements of the landing zone for TPVR compared to anatomical segmentation?
Observational (n=14)
Does 4D straightened segmentation provide accurate measurements of the landing zone for TPVR compared to anatomical segmentation?
4D straightened segmentation in cardiac CT provides accurate measurements for the periprocedural evaluation of the landing zone in transcatheter pulmonary valve replacement.
Cardiac computed tomography angiography (C-CTA) is crucial in assessing the right ventricular outflow tract (RVOT) prior to a transcatheter pulmonary valve replacement (TPVR), as an incorrect evaluation can make the procedure more challenging and can lead to device-related complications. This study aimed to evaluate the feasibility and accuracy of 4D straightened segmentation for a landing zone analysis over anatomical segmentation. Seven pre-operative CTAs and seven post-operative CTAs were used to measure the cross-sectional area, circumference, and diameters at five selected planes as the landing zone for TPVR and compared these to the 4D straightened model with the anatomical model. Furthermore, the right ventricular volume, stent volume, and 4D ellipticity index were calculated from the 4D straightened model. The 4D straightened segmentation had comparable accuracy and efficacy for the measurements at the landing zone. The cross-sectional area and the circumference varied greatly at the RVOT and the basal plane of the pulmonary valve compared with the other three planes of the 4D straightened models from the pre-operative CTAs; however, only the values at the RVOT were found to vary greatly from the post-operative CTAs. The 4D straightened model can provide accurate measurements and is thus a useful method for the periprocedural evaluation of TPVR.
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Sun et al. (2022) conducted an observational in Transcatheter pulmonary valve replacement (TPVR) (n=14). 4D straightened segmentation vs. Anatomical segmentation model was evaluated on Feasibility and accuracy of landing zone measurements (cross-sectional area, circumference, and diameters). 4D straightened segmentation demonstrated comparable accuracy and efficacy to anatomical segmentation for measuring the landing zone prior to transcatheter pulmonary valve replacement.
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