Semiautomatic, Quantitative Measurement of Aortic Valve Area Using CTA: Validation and Comparison with Transthoracic Echocardiography

Table 1

Manual and semiautomatic AVA measurements.

	Mean ± SD
Observer 1, manual measurements (cm^2)	0.88 ± 0.23
Observer 1, semiautomatic measurements (cm^2)	0.85 ± 0.15
Observer 2, manual measurements (cm^2)	0.98 ± 0.29
Observer 2, semiautomatic measurements (cm^2)	0.82 ± 0.18