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Objective To value diffusion-weighted imaging and ADC value measurement of benign and malignant axillary lymph node identification value. Methods From 2006-06 to 2008--02, by collecting in the hospital for breast dynamic con-trast-enhanced scans and diffusion-weighted imaging, 217 lesions in 56 cases with a clear outcome of the surgery and pathology and/or needle biopsy results were retrospectively analyzed.Results The DWI could accurately show the lymph node of the armpit abnormality, 163 cases of 47 breast cancer cases with lymph node metastasis showed high signal in DWI image that did not decrease with increasing b value, similar to the 54 cases of 9 benign enlarged responsive prolifer-ative lymph nodes. But the former showed higher signal than the later. The ADC values were(1.017±0.114)×10-3mm2/s and (1.905±0.136)×10-3mm2/s respectively, and showed significant difference between two groups (P<0.05). Conclusion The dynamic contrast-enhanced subtraction MR technology benign and malignant breast lesions has high diagnosis and differ-ential diagnosis importance. DWI and ADC value measurement is a safe, non-invasive, accurate and rapid diagnosis of metastasis axillary lymph nodes and benign proliferative response of the lymph nodes means.
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Objective To study the value of the early enhanced morphology in three dimensional dynamic contrast-enhanced and digital subtraction MRI in diagnosing breast cancer.Methods Three dimensional dynamic contrast-enhanced and digital subtraction MRI of breast neoplasm in 46 patients(52 lesions)verified by histopathology were performed before operations.MR imaging data were analysed.On the base of early-phase enhanced rate,peak time,blood vessel morphology and time-signal intensity curve,the diagnostic values of the early enhanced morphology of lesions were evaluated.Results In the 37 malignant breast lesions,31 lesions were enhanced from the center to the margin(83.8%,31/37),14 benign breast lesions were enhanced from the margin to the center(93.3%,14/15).The special features of breast cancer in three dimensional dynamic contrast-enhanced and digital subtraction MRI were circular enhancement and the contrast medium filled from the margins to the centre of lesions in middle-later phase,its diagnostic sensitivity,specificity and accuracy were 97.3%,93.3% and 96.2% respectively.Conclusion The morphological features of three dimensional dynamic contrast-enhanced and digital subtraction MRI has obvious advantages in diagnosing breast cancer.
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Objective To study the diagnostic value on mammary gland focal benign and malignant with MRI digital sub- traction. Methods By analyzing 109 histopathology cases of breast neoplasm which can be use three dimensional dynamic contrast and MRI digital subtraction. Based on early-phase enhancement rate peak time, time-signal intensity curve and enhanced lesions way, the diagnostic value on it was evaluated. Results The specificity signs of breast carcinoma are en- hanced ways on MRI enhancement scanning. The filling type is contrast agent filled from edge to centre. The sensitivity is 82.9%; specificity is 79.0%; accurate rate is 80.7%. Conclusion The aggrandizement form on filling type of breast MRI digital subtraction scanning focus has obvious advantages in breast carcinoma diagnosis.