[Ability of subtraction and dynamic MR imaging to detect breast tumors: comparison with ultrasonography and mammography].
We evaluated the ability of subtraction and dynamic MR imaging to accurately detect breast tumors. Sixty-five breast carcinomas and 24 fibroadenomas were examined by an SE pulse sequence using a 0.2 Tesla unit. Subtraction MR images were obtained every minute during dynamic study with Gd-DTPA. Almost all breast tumors were seen as very bright masses, and the margin of the mass was clearly demonstrated on subtraction MR images. Breast carcinomas and fibroadenomas showed characteristic time-intensity curves on dynamic study, Time-intensity curves of the early peak type and plateau type were seen in 97% of breast carcinomas, while the gradually increasing type was seen in 92% of fibroadenomas. The detectability of breast carcinoma was 98% by MRI, 98% by ultrasonography, and 87% by mammography. That of fibroadenoma was 95% by MRI, 91% by ultrasonography and 60% by mammography. Sensitivity and specificity for breast carcinoma were 98% and 92% for MRI and 97% and 71% for ultrasonography. For fibroadenoma, they were 96% and 98% for MRI and 89% and 92% for ultrasonography.
Terao
E
E
Department of Radiology, Jikei University, School of Medicine.
Takeuchi
H
H
Iwamura
A
A
Murakami
Y
Y
Harada
J
J
Tada
S
S
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000473:pathology; D018567:Breast Neoplasms, Male / Q000175:diagnosis* / Q000473:pathology; D002277:Carcinoma / Q000175:diagnosis / Q000473:pathology; D005260:Female; D018226:Fibroadenoma / Q000175:diagnosis / Q000473:pathology; D006801:Humans; D007089:Image Enhancement; D007231:Infant, Newborn; D008279:Magnetic Resonance Imaging; D008297:Male; D008327:Mammography; D008875:Middle Aged; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D016217:Ultrasonography, Mammary