ABSTRACT
A small HIFU system was used to investigate the phase-shift droplet vaporization in vivo and its effect on thermal absorption in tissue-mimicking phantoms. The experiments demonstrated that droplets could be vaporized to bubbles in vivo by the small HIFU system and the volume of bubbles could increase by tens of times. With appropriate droplets concentration, lesion volume produced by HIFU could be increased significantly under the same HIFU parameter.
Subject(s)
Fluorocarbons , Image Enhancement , Ultrasonic Therapy , MethodsABSTRACT
Objective To study the clinical features and treatment of unilateral multicentric breast cancer.Methods The clinical data of 14 cases of unilateral multicentric breast cancer,which were found from July,2004 to December,2007 were analyzed retrospectively.ResultsSix cases(42.9%) had infiltrating lobular carcinoma,and the other 8 cases(57.1%) were invasive ductal carcinoma.The number of cancer focus was 2 to 9,and with a diameter of 0.5-4.3 cm.The focus in 12 cases were located in upper lateral quadrant;1 case was located in the upper medial and lateral quadrant;1 case was located in the upper lateral quadrants,the junction area of upper medial and upper lateral quadrants,and between upper lateral quadrant and lower lateral quadrants.One patient was treated by breast conservation operation,with no recurrence at 3-5 years follow-up;while the other 13 cases received modified radical operation,and with no recurrence at 2-37 months of follow-up.ConclusionsUnilateral multicentric breast cancer are often distributed in the same quadrant or adjacent quadrants of breast,and the majority cases are with invasive ductal carcinoma.For treatment of these lesions were a modified radical operation combine with comprehensive treatment.