advisor : cheng-hsin chuang advisee ﹕ tsan-hsiu li department of mechanical engineering southern...
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Advisor : Cheng-Hsin Chuang Advisee Tsan-Hsiu Li﹕
Department of Mechanical EngineeringSouthern Taiwan University
Date 2013/9/13﹕
Paper Survey
Design of Noncontact Tumor Imager forVideo-Assisted Thoracic Surgery
IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL. 15, NO. 6, DECEMBER 2010
Tomohiro Kawahara, Member, Yoshihiro Miyata, Koichi Akayama, Masazumi Okajima, Makoto Kaneko
Graduate School of Biomedical Sciences, Hiroshima University Hospital, Hiroshima University, Hiroshima , Japan
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Outline
Design Concept
Experiment Setup
Experiment Results Basic Experiment Human Lung Experiments Animal Lung Experiments
Clinical Application
Future Works
u(t) = A1 sin(2πft) + A2
z(s0, t) = B1 sin(2πft + α) + B2
A1:amplitude of the vibrating component of the input forceA2:constant component of the input forceB1:amplitude of vibrating component of the displacement sensorB2:constant component of the output of the displacement sensor
Fig. 3. Overview of the prototype sensor head.
Design Concept
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Fig. 2. Basic principle of noncontact tumor imager.
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Lissajous Diagram
Experiment Setup
Fig. 4. Basic experimental setup.
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f =40Hz Input pressure=0.15MPa Slider Speed =10mm/s
Basic Experiment With normal surface (white). With colored surface (red and black).
Silicone objectSilicone object
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Human Lung Experiments The normal tissue The tumor tissueInput pressure=0.15MPa
f =40Hz ds=10~20mm
Animal Lung Experiments
7Fig. 10. Detection results of artificial tumors.
Input pressure=0.15MPa f =30Hz Di=5,8,10mm
Di/De ≥ 1 mm
Clinical Application
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(a)
(c)
Fig. 13. Example of the clinical test (right lobe, 72-year old male, [Di,De ]= [15, 34] mm based on CT). (a) CT image. (b) Overview of the measurement.(c) Real-time detection display
Fig. 12. Developed sensor system for clinical application. Overwiew of the developed sensor system.
Conclusion
1) In a multicolored environment, whereas it is difficult for us to judge a consistent change from the output signal with respect to time.
2) It is desirable that the developed sensor is as small as possible and that it can detect tumors with a ratio of Di/De < 1.
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Future Works
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Thanks for your attention