Table 15 Training times with 1 vs. 1 (5 slices selected with SSIM).

From: Improving early detection of Alzheimer’s disease through MRI slice selection and deep learning techniques

1 vs. 1

Models

Estimated

epoch duration

Total training time

CN/AD

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

33 seconds

47 seconds

39 seconds

60 seconds

71 seconds

90 seconds

5.8 minutes

7.5 minutes

6.2 minutes

8.3 minutes

12 minutes

15.1 minutes

CN/MCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

41 seconds

59 seconds

51 seconds

77 seconds

85 seconds

119 seconds

7.1 minutes

8.5 minutes

8.7 minutes

12.5 minutes

15.3 minutes

19.3 minutes

CN/LMCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

31 seconds

39 seconds

38 seconds

49 seconds

69 seconds

75 seconds

4.8 minutes

6.4 minutes

6.3 minutes

8.4 minutes

10.4 minutes

13.6 minutes

CN/EMCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

38 seconds

50 seconds

44 seconds

63 seconds

76 seconds

95 seconds

5.3 minutes

7.2 minutes

6.1 minutes

9.6 minutes

11.4 minutes

14.3 minutes

AD/MCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

18 seconds

22 seconds

16 seconds

25 seconds

30 seconds

45 seconds

2.1 minutes

3.4 minutes

2.6 minutes

4.3 minutes

5.6 minutes

7.5 minutes

AD/LMCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

5 seconds

7 seconds

7 seconds

8 seconds

11 seconds

12 seconds

1.01 minutes

1.2 minutes

1.1 minutes

1.43 minutes

1.8 minutes

1.6 minutes

AD/EMCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

7 seconds

9 seconds

9 seconds

11 seconds

16 seconds

18 seconds

1.2 minutes

1.56 minutes

1.43 minutes

1.29 minutes

1.5 minutes

2.6 minutes

MCI/LMCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

15 seconds

17 seconds

13 seconds

18 seconds

27 seconds

38 seconds

2.43 minutes

2.52 minutes

2.8 minutes

3.21 minutes

4.2 minutes

5.91 minutes

MCI/EMCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

15 seconds

18 seconds

20 seconds

28 seconds

29 seconds

38 seconds

3.1 minutes

4.13 minutes

3.62 minutes

5.17 minutes

6.2 minutes

7.75 minutes

LMCI/EMCI

EfficientNetB2

InceptionV3

RegNetx006

Basic ViT

EfficientNetB2+FPN (Our Model)

ViT + EfficientNetB2 + FPN (Our Model)

4 seconds

6 seconds

6 seconds

7 seconds

9 seconds

11 seconds

0.75 minutes

1.10 minutes

1.0 minutes

1.32 minutes

1.67 minutes

2.0 minutes