1H-MR spectroscopy of suspicious breast mass lesions at 3T: a clinical experience.
Radiol Med
; 122(3): 161-170, 2017 Mar.
Article
em En
| MEDLINE
| ID: mdl-27981485
ABSTRACT
OBJECTIVES:
To test 3T proton magnetic resonance spectroscopy (1H-MRS) for breast mass lesions.METHODS:
Patients with BI-RADS 4-5 lesions at mammography/ultrasound were prospectively enrolled. After contrast-enhanced breast MRI, single-voxel MRS (point-resolved volume selection, PRESS); pencil-beam shimming; volume of interest 1 cm3; TR/TE = 3000/135 ms) was performed. Spectra were considered reliable if the full width at half maximum (FWHM) of the water peak was ≤45 Hz. A signal-to-noise ratio of the total choline (tCho) peak at 3.21 ppm ≥2 was used as cutoff for malignancy. All lesions underwent needle sampling. Final pathology was available for all malignant lesions; for benign lesions the reference standard was final pathology or at least 1-year negative follow-up.RESULTS:
Reliable spectra were obtained in 115/127 lesions (91%), with a mean FWHM of 32.4 Hz (range 8-45 Hz). A tCho peak SNR ≥2 was detected in 66 malignant lesions (62 invasive cancers; 4 ductal carcinoma in situ) and in 3 benign lesions. Excluding lesions located ≤1 cm from the skin (n = 3) or pectoral muscle (n = 11), sensitivity was 65/73 [89%, 95% confidence interval (CI) 80-95%], and specificity 25/28 (89%) (95% CI 72-98%). Considering only invasive cancers, sensitivity reached 61/68 (90%, 95% CI 81-96%). MRS additional time was 8 min.CONCLUSIONS:
When lesions close to the skin or pectoral muscle are excluded, 3T 1H-MRS of mass lesions ≥1 cm showed a high diagnostic performance, however, insufficient to avoid needle biopsy.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
/
Espectroscopia de Prótons por Ressonância Magnética
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
Limite:
Adult
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Aged
/
Aged80
/
Female
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Humans
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Middle aged
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article