TY - JOUR
T1 - Human breast lesions
T2 - Characterization with proton MR spectroscopy
AU - Roebuck, Joseph R.
AU - Cecil, Kim M.
AU - Schnall, Mitchell D.
AU - Lenkinski, Robert E.
PY - 1998/10
Y1 - 1998/10
N2 - PURPOSE: To assess the clinical usefulness of spatially localized hydrogen-1 magnetic resonance (MR) spectroscopy in distinguishing benign from malignant lesions on the basis of total choline levels. MATERIALS AND METHODS: These studies were performed at 1.5 T with a four-channel multicoil that compresses the breast sagittally. Contrast material enhanced MR imaging and single-voxel H-1 MR spectroscopy were performed in 17 patients (age range, 25-68 years) who had nonspecific mammographic findings. Histopathologic correlations were made from biopsy or surgical specimens. Ten patients had various malignant breast lesions 1-4 cm in diameter, and seven patients had benign processes. RESULTS: Most studies were performed with nominal voxel sizes (<2 cm3). Spectra obtained with an echo time of 31 msec showed resonances from water and mobile fatty acids and, in some cases, the N-trimethyl resonance of choline-containing compounds (Cho) at 3.2 ppm. The absolute concentration of Cho in each lesion was determined with a phantom containing 1 mmol/L Cho as an external reference. On the basis of reference measurements, the least detectable level of Cho was 0.2 mmol/L. With this threshold, seven of 10 malignant lesions showed detectable levels of Cho. In contrast, Cho was seen in only one patient with an extremely rare benign process, a tubular adenoma. The remaining six patients with benign processes demonstrated no detectable Cho levels. CONCLUSION: Spatially localized H-1 MR spectroscopy can provide sufficient sensitivity and spectral resolution at 1.5 T to demonstrate Cho in human breast lesions with a spectroscopic protocol that provides up to 1-cm3 resolution. Determining the presence of Cho may provide a useful test for malignancy.
AB - PURPOSE: To assess the clinical usefulness of spatially localized hydrogen-1 magnetic resonance (MR) spectroscopy in distinguishing benign from malignant lesions on the basis of total choline levels. MATERIALS AND METHODS: These studies were performed at 1.5 T with a four-channel multicoil that compresses the breast sagittally. Contrast material enhanced MR imaging and single-voxel H-1 MR spectroscopy were performed in 17 patients (age range, 25-68 years) who had nonspecific mammographic findings. Histopathologic correlations were made from biopsy or surgical specimens. Ten patients had various malignant breast lesions 1-4 cm in diameter, and seven patients had benign processes. RESULTS: Most studies were performed with nominal voxel sizes (<2 cm3). Spectra obtained with an echo time of 31 msec showed resonances from water and mobile fatty acids and, in some cases, the N-trimethyl resonance of choline-containing compounds (Cho) at 3.2 ppm. The absolute concentration of Cho in each lesion was determined with a phantom containing 1 mmol/L Cho as an external reference. On the basis of reference measurements, the least detectable level of Cho was 0.2 mmol/L. With this threshold, seven of 10 malignant lesions showed detectable levels of Cho. In contrast, Cho was seen in only one patient with an extremely rare benign process, a tubular adenoma. The remaining six patients with benign processes demonstrated no detectable Cho levels. CONCLUSION: Spatially localized H-1 MR spectroscopy can provide sufficient sensitivity and spectral resolution at 1.5 T to demonstrate Cho in human breast lesions with a spectroscopic protocol that provides up to 1-cm3 resolution. Determining the presence of Cho may provide a useful test for malignancy.
KW - Breast neoplasms, MR
KW - Breast neoplasms, diagnosis
KW - Magnetic resonance (MR), spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=0031713186&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031713186&partnerID=8YFLogxK
U2 - 10.1148/radiology.209.1.9769842
DO - 10.1148/radiology.209.1.9769842
M3 - Article
C2 - 9769842
AN - SCOPUS:0031713186
SN - 0033-8419
VL - 209
SP - 269
EP - 275
JO - RADIOLOGY
JF - RADIOLOGY
IS - 1
ER -