The Value of Contrast-Enhanced Ultrasound in the Diagnosis of Cesarean Scar Pregnancy

Table 2

Comparison of TIC parameter between CSP and intrauterine pregnancy patients.

Parameter	Cesarean scar pregnancies ()	Intrauterine pregnancy ()
Time parameter
Arrival time/s	10.91 ± 1.27	17.25 ± 0.89	26.886	<0.001
Time to peak/s	24.73 ± 2.64	39.75 ± 1.83	30.67	<0.001
Time from peak to one half/s	81.56 ± 3.74	79.90 ± 2.97	2.303	0.024
Intensity parameter
Basic intensity/dB	0.49 ± 0.06	0.50 ± 0.07	0.737	0.463
Peak intensity/dB	19.17 ± 2.04	10.39 ± 1.15	24.384	<0.001
Wash in slope/(dB/s)	1.16 ± 0.16	1.18 ± 0.22	0.505	0.615

TIC: time-intensity curve; CSP: cesarean scar pregnancy; dB: Decibel.
Analysis of the TIC time parameters showed faster arrival time, time to peak, and time from peak to one half () in patients with CSP, when compared with intrauterine pregnancy patients. The TIC intensity parameters showed that CSP patients had a higher peak intensity than intrauterine pregnancy patients (). There were no obvious differences between CSP and intrauterine pregnancy patients in basic intensity and wash-in slope ().