Using synthetic data generation to train a cardiac motion tag tracking neural network.
Using synthetic data generation to train a cardiac motion tag tracking neural network.
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DOI:
10.1016/j.media.2021.102223
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发表时间:
2021-12
影响因子:
10.9
通讯作者:
Ennis DB
中科院分区:
文献类型:
--
作者:
Loecher M;Perotti LE;Ennis DB
A CNN based method for cardiac MRI tag tracking was developed and validated. A synthetic data simulator was created to generate large amounts of training data using natural images, a Bloch equation simulation, a broad range of tissue properties, and programmed ground-truth motion. The method was validated using both an analytical deforming cardiac phantom and in vivo data with manually tracked reference motion paths. In the analytical phantom, error was investigated relative to SNR, and accurate results were seen for SNR>10 (displacement error <0.3 mm). Excellent agreement was seen in vivo for tag locations (mean displacement difference = −0.02 pixels, 95% CI [−0.73, 0.69]) and calculated cardiac circumferential strain (mean difference = 0.006, 95% CI [−0.012, 0.024]). Automated tag tracking with a CNN trained on synthetic data is both accurate and precise.
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