Diagnostic Value of Breast Proton Magnetic Resonance Spectroscopy at 1.5T in Different Histopathological Types

Table 1

Summary of tumor size, tCho detection rate, and tCho concentration level in morphological types.

Tumor morphology	Mean size (cm)**	No. of true positives	No. of false negatives	tCho detection rate	Mean tCho (mmol/kg)
Mass	2.5	53	25	82%	2.76
Nonmass	4.8	12	9	57%	2.39

Tumor size (cm) was calculated by taking the square root of the product (e.g., the longest dimension × the longest perpendicular dimension of the maximum intensity projection (MIP) of the MR subtraction images). **𝑃<0.0002, where the significance level was set at 𝑃<0.05. There is no significant group difference in tCho level (𝑃>0.05).