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Table 2 Summary of the results for STE.

From: Non-negative matrix factorisation methods for the spectral decomposition of MRS data from human brain tumours

Experiment: STE. A2, NO. (2 sources)

 

Random

K-means

FCM

PCA

FastICA

NMF (als)

euc

A2: 0.94

A2: 0.94

A2: 0.94

A2: .83

A2: 0.96

A2: 0.92

 

NO: 0.87

NO: 0.97

NO: 0.96

NO: 0.93

NO: 0.76

NO: 0.75

als

A2: 0.92

A2: 0.95

A2: .95

A2: .92

A2: 0.93

A2: 0.92

 

NO: 0.75

NO: 0.96

NO: 0.96

NO: 0.96

NO: 0.83

NO: 0.75

alspg

A2: 0.93

A2: 0.95

A2: .95

A2: .92

A2: 0.95

A2: 0.92

 

NO: 0.75

NO: 0.96

NO: 0.96

NO: 0.96

NO: 0.75

NO: 0.75

alsobs

A2: 0.92

A2: 0.94

A2: .94

A2: .92

A2: 0.95

A2: 0.92

 

NO: 0.76

NO: 0.96

NO: 0.96

NO: 0.96

NO: 0.75

NO: 0.75

convex

A2: 0.99

A2: 0.99

A2: .99

A2: .98

A2: 0.99

A2: .99

 

NO: 0.99

NO: 1.00

NO: 1.00

NO: 1.00

NO: 0.99

NO: 1.00

Experiment: STE. A2, ME, NO. (3 sources)

 

Random

K-means

FCM

PCA

FastICA

NMF (als)

euc

A2: 0.93

A2: 0.94

A2: 0.93

A2: 0.91

A2: 0.94

A2: 0.93

 

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.86

ME: 0.99

ME: 0.98

 

NO: 0.83

NO: 0.80

NO: 0.89

NO: 0.87

NO: 0.86

NO: 0.74

als

A2: 0.93

A2: 0.94

A2: 0.94

A2: 0.94

A2: 0.94

A2: 0.93

 

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

 

NO: 0.75

NO: 0.74

NO: 0.74

NO: 0.74

NO: 0.74

NO: 0.74

alspg

A2: 0.94

A2: 0.93

A2: 0.93

A2: 0.94

A2: 0.94

A2: 0.94

 

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

 

NO: 0.69

NO: 0.73

NO: 0.73

NO: 0.69

NO: 0.70

NO: 0.74

alsobs

A2: 0.94

A2: 0.94

A2: 0.94

A2: 0.94

A2: 0.94

A2: 0.94

 

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

ME: 0.98

 

NO: 0.69

NO: 0.69

NO: 0.72

NO: 0.69

NO: 0.71

NO: 0.69

convex

A2: 0.98

A2: 0.99

A2: 0.99

A2: 0.91

A2: 0.99

A2: 0.99

 

ME: 1.00

ME: 1.00

ME: 1.00

ME: 0.99

ME: 0.99

ME: 0.99

 

NO: 0.99

NO: 1.00

NO: 1.00

NO: 0.93

NO: 0.99

NO: 0.99

Experiment: STE. A2, GL, NO. (3 sources)

 

Random

K-means

FCM

PCA

FastICA

NMF (als)

euc

A2: 0.94

A2: 0.91

A2: 0.91

A2: 0.70

A2: 0.95

A2: 0.91

 

GL: 0.95

GL: 0.91

GL: 0.94

GL: 0.56

GL: 0.96

GL: 0.95

 

NO: 0.81

NO: 0.92

NO: 0.92

NO: 0.65

NO: 0.85

NO: 0.80

als

A2: 0.91

A2: 0.90

A2: 0.90

A2: 0.90

A2: 0.91

A2: 0.90

 

GL: 0.95

GL: 0.95

GL: 0.95

GL: 0.95

GL: 0.95

GL: 0.95

 

NO: 0.76

NO: 0.90

NO: 0.89

NO: 0.83

NO: 0.79

NO: 0.82

alspg

A2: 0.90

A2: 0.91

A2: 0.91

A2: 0.90

A2: 0.93

A2: 0.90

 

GL: 0.95

GL: 0.93

GL: 0.93

GL: 0.95

GL: 0.95

GL: 0.95

 

NO: 0.84

NO: 0.93

NO: 0.93

NO: 0.85

NO: 0.72

NO: 0.83

alsobs

A2: 0.93

A2: 0.91

A2: 0.91

A2: 0.91

A2: 0.92

A2: 0.92

 

GL: 0.95

GL: 0.95

GL: 0.93

GL: 0.95

GL: 0.95

GL: 0.95

 

NO: 0.72

NO: 0.80

NO: 0.93

NO: 0.80

NO: 0.72

NO: 0.74

convex

A2: 0.95

A2: 0.98

A2: 0.94

A2: 0.94

A2: 0.99

A2: 0.99

 

GL: 0.98

GL: 0.98

GL: 0.98

GL: 0.98

GL: 0.98

GL: 0.98

 

NO: 0.94

NO: 1.00

NO: 0.94

NO: 0.95

NO: 0.99

NO: 1.00

Experiment: STE. A2, MM, NO. (3 sources)

 

Random

K-means

FCM

PCA

FastICA

NMF (als)

euc

A2: 0.93

A2: 0.91

A2: 0.95

A2: 0.83

A2: 0.94

A2: 0.92

 

MM: 0.57

MM: 0.56

MM: 0.54

MM: 0.74

MM: 0.64

MM: 0.57

 

NO: 0.83

NO: 0.95

NO: 0.73

NO: 0.89

NO: 0.77

NO: 0.79

als

A2: 0.93

A2: 0.93

A2: 0.93

A2: 0.92

A2: 0.93

A2: 0.92

 

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

 

NO: 0.76

NO: 0.79

NO: 0.77

NO: 0.75

NO: 0.76

NO: 0.75

alspg

A2: 0.92

A2: 0.93

A2: 0.91

A2: 0.91

A2: 0.92

A2: 0.92

 

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

 

NO: 0.77

NO: 0.80

NO: 0.81

NO: 0.81

NO: 0.80

NO: 0.75

alsobs

A2: 0.92

A2: 0.92

A2: 0.92

A2: 0.92

A2: 0.92

A2: 0.92

 

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

MM: 0.57

 

NO: 0.77

NO: 0.80

NO: 0.80

NO: 0.80

NO: 0.76

NO: 0.77

convex

A2: 0.95

A2: 0.98

A2: 0.93

A2: 0.96

A2: 0.98

A2: 0.98

 

MM: 0.98

MM: 0.90

MM: 0.91

MM: 0.79

MM: 0.86

MM: 0.85

 

NO: 0.91

NO: 1.00

NO: 0.95

NO: 0.98

NO: 0.99

NO: 0.98

  1. Summary of the correlation values for the sources most highly correlating with each type of tissue as expressed by its mean spectrum, for different diagnostic problems at STE, and for all the NMF methods and the initialisation conditions in the study. The diagnostic problems are: A2, NO; A2, ME, NO; A2, GL, NO; and A2, MM, NO