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Table 1 Adjacency list representation of final belief network. The destination vertices from each vertex are shown in the "Connections" column

From: Generating prior probabilities for classifiers of brain tumours using belief networks

Vertex

Description

Connections (vertex, weight)

v 1

posterior fossa

(v 3, 222/631), (v 4, 109/631), (v 5, 300/631)

v 2

supratentorial

(v 6, 276/702), (v 7, 67/702), (v 8, 21/702), (v 9, 17/702), (v 10, 99/702), (v 11, 104/702), (v 12, 67/702), (v 13, 51/702)

v 3

brain stem

(v 24, 189/222), (v 28, 1/222), (v 29, 3/222), (v 30, 4/222), (v 31, 6/222), (v 32, 19/222)

v 4

IV ventricle

(v 24, 16/109), (v 28, 3/109), (v 29, 24/109), (v 30, 56/109) (v 32, 10/109)

v 5

cerebellum

(v 24, 168/300), (v 28, 9/300), (v 29, 12/300), (v 30, 87/300), (v 31, 3/300), (v 32, 21/300)

v 6

cerebrum

(v 14, 4/230), (v 15, 55/230), (v 16, 14/230), (v 17, 70/230), (v 18, 87/230)

v 7

pineal

(v 24, 3/67), (v 26, 19/67), (v 27, 17/67), (v 28, 1/67) (v 32, 27/67)

v 8

pituitary

(v 25, 12/21), (v 32, 9/21)

v 9

lateral ventricle

(v 24, 5/17), (v 29, 1/17), (v 31, 1/17), (v 32, 10/17)

v 10

optic pathway

(v 19, 25/99), (v 20, 74/99)

v 11

sella turcica

(v 24, 25/104), (v 25, 51/104), (v 27, 10/104), (v 28, 1/104), (v 29, 1/104), (v 31, 1/104), (v 32, 15/104)

v 12

"deep structures"

(v 21, 52/67), (v 22, 14/67), (v 23, 1/67)

v 13

III ventricle

(v 24, 26/51), (v 25, 4/51), (v 29, 3/51), (v 30, 2/51), (v 31, 1/51), (v 32, 15/51)

v 14

"other cerebral area"

(v 24, 3/4), (v 32, 1/4)

v 15

frontal lobe

(v 24, 19/55), (v 25, 3/55), (v 28, 4/55), (v 29, 5/55), (v 31, 8/55), (v 32, 16/55)

v 16

occipital lobe

(v 24, 7/14), (v 28, 2/14), (v 29, 2/14), (v 32, 3/14)

v 17

parietal lobe

(v 24, 37/70), (v 28, 13/70), (v 29, 4/70), (v 30, 2/70), (v 31, 3/70), (v 32, 11/70)

v 18

temporal lobe

(v 24, 51/87), (v 28, 2/87), (v 29, 7/87), (v 30, 1/87), (v 31, 5/87), (v 32, 21/87)

v 19

optical chiasm

(v 24, 22/25), (v 25, 1/25), (v 32, 2/25)

v 20

optic nerve

(v 24, 73/74), (v 32, 1/74)

v 21

thalamus

(v 24, 35/52), (v 28, 1/52), (v 29, 1/52), (v 31, 3/52) (v 32, 12/52)

v 22

hypo-thalamus

(v 24, 10/14), (v 27, 1/14), (v 32, 3/14)

v 23

basal ganglia

(v 24, 1/1)

v 24

astrocytoma G1, G2 and optic pathway glioma

(v 24, 1)

v 25

craniopharyngioma

(v 25, 1)

v 26

pineoblastoma

(v 26, 1)

v 27

germinoma

(v 27, 1)

v 28

PNET

(v 28, 1)

v 29

ependymoma

(v 29, 1)

v 30

medulloblastoma

(v 30, 1)

v 31

astrocytoma G3, G4

(v 31, 1)

v 32

other tumour

(v 32, 1)

  1. The probabilities (weights) for each connection are expressed as a fraction, giving the final quantities obtained from the WMRCTR. For example, 222 cases of the 631 tumours in the posterior fossa, were in the brain stem.