Current Status and Future Prospects of Proton MR Spectroscopy of the Breast with a 1.5T MR Unit

Table 2

The diagnostic power of proton MR spectroscopy for nonmass lesions.

Study	year	No. of malignant lesions	No. of benign lesions	Sensitivity (%)	Specificity (%)	No. of false-positive findings	PPV (%)
Bartella et al. [25]	2007	12	20	100	85	3	80
		invasive ductal carcinoma; 10 ductal carcinoma in situ; 2				fibroadenoma; 1 inflammatory lesions with atypia; 1 atypical ductal hyperplasia; 1
Tozaki et al. [23]*	2009	28	16	32	75	4	69
		invasive ductal carcinoma; 2 microinvasion; 1 ductal carcinoma in situ; 25				benign proliferative disease; 4

*nonmass lesions.