Low-dose spectral insufflation computed tomography protocol preoperatively optimized for T stage esophageal cancer - preliminary research experience

Table 3 Comparisons between morphological changes of the triangular area in front of the vertebral body and pathological T stage

Group	Morphological change of triangle area in front of vertebral body	Medullary type		Ulcerative type		Mushroom type		Total
		T3	T4	T3	T4	T3	T4
A	Clear	6	3	3	0	3	0	15
	Blurred or disappeared	4	3	1	0	0	0	8
Total		10	6	4	0	3	0	23
B	Clear	7	3	5	0	3	0	18
	Blurred or disappeared	3	4	0	0	0	0	7
Total		10	7	5	0	3	0	25
C	Clear	7	6	5	0	2	0	20
	Blurred or disappeared	2	7	0	0	0	0	9
Total		9	13	5	0	2	0	29