Enhanced frequency analysis on a vibrated tumor with a compression cylinder

ROBOMECH Journal

article

Satoshi Miura¹  Hidekazu Ishiuchi¹  Yuta Shintaku¹  Victor Parque¹  Ayako Torisaka²  Tomoyuki Miyashita¹ 

[1] Department of Modern Mechanical Engineering, Waseda University;Department of Aeronautics and Astronautics, Tokyo Metropolitan University

关键词: Vibration analysis;    Breast cancer diagnosis;    Resonance frequency analysis;   

DOI  :  10.1186/s40648-019-0138-x

学科分类：社会科学、人文和艺术（综合）

来源: Springer

【 摘 要 】

Breast cancer diagnosis has been mostly accomplished through imaging. These methods have great advantages in being able to detect the presence and location of breast cancer. However, it is difficult to distinguish between a benign and malignant tumor located in a deep position because both tumor types look similar. In this paper, tissue including the tumor from skin was vibrated using a compression cylinder, to analyze the frequency difference for distinguishing tissue type. Before distinguishing between a benign and malignant tumor, it is necessary to validate that the difference between normal tissue and tumor can be distinguished. The objective of the study is to validate the feasibility to emphasize the frequency differences in a 10.0 mm or greater deep tumors during vibration by pushing a cylinder towards the deep tumor. A phantom model and finite element analysis model were constructed to simulate the breast. In the experiment, air was injected into the phantom and the displacement was measured. The frequency response for distinction of tissue types was analyzed and it was found that the displacement difference rate was over 50% at a frequency of 130 Hz when the cylinder was pushed into the sample as opposed to when not pushed in. Changes in displacement were measured according to the distance between the tumor and vibration point using finite element analysis. When the measurement and vibration points were on the center of the tumor, the difference in the resonance point was at its largest (5.5 Hz). Results show that the position of a tumor could be easily and rapidly detected by vibrations from a cylinder pushed into the diagnostic site.

【 授权许可】

CC BY