论文部分内容阅读
Pathological lesions often result in a change in tissue consistency that allows for detection by clinical palpation.However, palpation is subjective and limited to large and/or superficial lesions.Elastography is the technique of imaging the hardness of soft tissue.Conventional ultrasound can distinguish benign from malignant breast lesions based on the appearance.Ultrasound elastography can differentiate benign from malignant lesions by their difference in strain pattern.The extended combined auto-correlation method (CAM) of tissue elasticity allows for real-time strain image visualisation using a freehand ultrasonic probe.There are several published results to show good correlation between elasticity score and histology with sensitivity ranging from 77-89% and specificity of 79-98%.Ultrasound elastography has been used to improve the diagnostic confidence in BIRADS 2 lesion with elasticity score of 2 and below.Some authors have reported using it tore-classify BIRADS 3 and 4 lesions to BIRADS 2.Non-palpable,BIRADS 4a lesions with elasticity score of 1 were found to be benign on biopsy.In providing additional information,ultrasound elastography can provide more accurate diagnosis of breast lesions, potentially reducing the need for biopsy to confirm benign lesions.