Table 5.

The calculated distance (cm) between real and predicted ETT locations.

Group	Loss function	Distance (cm)
		Fold1	Fold2	Fold3	Fold4	Fold5	Mean
Region-based loss	Dice	0.3244	0.3741	0.6841	0.6814	0.5624	0.5253
	Tversky	0.7420	0.4166	0.5843	0.5407	0.4392	0.5446
	Jaccard	0.3909	0.5124	1.6230	0.7222	0.5468	0.7591
						Average =	0.6096
Distribution-based loss	BCE	0.3847	0.4069	0.4670	0.3993	0.3498	0.4015
	Focal	0.2225	0.4317	0.3255	0.4192	0.4765	0.3751
	MCC	0.2996	0.4503	0.4447	0.3289	0.4114	0.3870
						Average =	0.3878
Compound loss	BCE-Dice	0.1835	0.2579	0.3905	0.3385	0.2803	0.2901
	BCE-Jaccard	0.1728	0.4875	0.3546	0.3446	0.3897	0.3498
	BCE-Tversky	0.2464	0.3244	0.4573	0.3880	0.3897	0.3611
	Focal-Dice	0.2180	0.5053	0.2742	0.3420	0.3489	0.3377
	Focal-Jaccard	0.2154	0.3368	0.3352	0.3454	0.2734	0.3012
	Focal-Tversky	0.2304	0.2455	0.3052	0.2899	0.4418	0.3168
	MCC-Dice	0.1959	0.3377	0.4748	0.3506	0.4079	0.3534
	MCC-Tversky	0.2358	0.3014	0.4137	0.4270	0.4019	0.3560
	MCC-Jaccard	0.3608	0.2420	0.3449	0.3897	0.3993	0.3473
						Average =	0.3348

The bold value indicates the minimum average error on different studied folds.