This document summarizes research on applying airborne ultrasound Doppler systems to external urodynamics (the study of bladder and urethral function during urination). The researchers developed a wearable sensor using 40kHz airborne ultrasound Doppler to noninvasively measure urinary flow patterns, as an alternative to conventional uroflowmetry methods that require use of equipment in a clinical setting. They were able to successfully acquire diagnostic-quality urination pattern data for most test subjects. While pulsed Doppler systems did not work well due to transducer bandwidth limitations, continuous-wave Doppler systems using a 40kHz transducer provided full functionality and qualitatively similar data to conventional methods. This suggests Doppler-based u

1. 空中超音波パルスドラシステムのウロダイナミクス応用
日超医86回大会
86P-005
松 本 成 史、竹 内 康 人、柿 崎 秀 宏
旭川医科大学 腎泌尿器外科学講座
.ppt 縮刷版

2. Airborne Ultrasound Doppler System for
External Urodynamics Application
Seiji Matsumoto, Yasuhito Takeuchi* and Hidehiro Kakizaki
Department of Renal and Urologic Surgery
Asahikawa Medical University
2-1-1-1 Midorigaoka Higashi, Asahikawa 078-8510 Japan
*corresponding author
y.takeuchi@ieee.org,
37 Mikumicho, Hamamatsu 432-8017 Japan, +81534531314
This Slide 1st used for YKJCA 2013@Korea
Maritime University 2013:01:26,BusanKorea,
Reorganized 2013:05:25 for JSUM 86th Meeting
86P-005
Research Conducted By
Asahikawa Medical University
Department of Renal and Urologic Surgery

3. We do now by
40KHz airborne
ultrasound
Doppler
Wearable Sensor
Conventional Mess-Cup Method
(clinically yet used now)
We did in 1988
by standalone
24GHz MMW
Doppler

4. ウロダイナミクスの先駆けが尿流測定 (uroflowmetrey: UFM).
機器や検査所見の単純さ, 患者への非侵襲性から UFM は瞬く間に全国の泌尿器科施設に
普及したが, 検査場所で図の如くの機器に対して排尿をしてもらわなければならない.
＜尿流計（流量計）＞ ＜尿流測定のパラメーターと尿流波形＞
(s)
(mL/s)
平均尿流率
排尿時間
最大尿流率
排尿量
20
10
30
10 20
10 20 30
10
10 20 30
10
（正常）
（前立腺肥大症）
（腹圧排尿）

6. Case 1：Male 65
Symptom：retardation, incomplete feeling, residual droplets.
Case 2：Male 79
Symptom：retardation, abdominal straining, residual droplets.

7. 13th Infrared and MM-Wave (IRMMW-1988)
Takeuchi Y., CW Doppler Systems for External Urodynamics Study, Comparison between Electromagnetic Wave
and Airborne Ultrasound" 13th IRMMW session F1.8, SPIE Volume 1039, 1988

8. Takeuchi Y. CW Doppler Systems for External Urodynamics Study, Comparison between electromagnetic Wave
and Airborne Ultrasound" 13th IRMMW session F1.8, SPIE Volume 1039, 1988
13th IRMMW (1988)

9. Let s move to
Patient-Own Device//Patient Self
Management
of Health-Care
however
The Word In Fashon NOW
DIGITAL HEALTH

10. D I Y
DO IT FOR YOURSELF

12. Latest Prototype Unit
Dual Transducer Model

13. Single and Dual Transducer Models

16. In-Use Model

17. Doppler
Signal
(audio)
Doppler
Signal
Frequency
Spectrum
Fd=330Hz
Fd=0(dc)
t=0 t=30sec.
Example of Doppler Signal and its Spectrum of Real Urination.

18. Another Example of Real Urination

19. Signal
Spectrum
Conventional
Method Uroflow-
metry Data
Doppler-Based
Uroflowmetry
Substitute

20. Ridge Tracing on Spectrogram
(With Speckle Reduction and 2D Smoothing)
This will be applicable as conventional uroflowmetry substitute

21. Edge Tracing vs. Ridge Tracing; Which is Better or
More Applicable? (in study)
Edge
Ridge
Expected Conclusion: Both are Equally Applicable

22. Some Unexpected/Unexplained Issue
Why Spectrogeam Looks Smashed/Flattened?

23. Pro and Con of Wide Directivity CW Doppler System
So Variety of Theta
Wide View Flattened Spectrum

24. Pulsed/Range -Gated System would be more selective
Range Selective

26. Trial Pulsed-Doppler System; Transducer Bandwidth
Limiting Range Resolution, Not-So-Ideal Performance

27. -3dB Bandwidth =~ 1.8KHz
where Sound Speed =~ 340m/sec.
Range Resolution = NO BETTER THAN about 20cm
NONSENSE !!!

28. Doppler Spectra of Pulsed and CW systems
with system bandwidth = 1.8KHz
No Essential Difference = 100% Discouraging

29. For Pissing Boy Doppler Demo Visit:
http://www.youtube.com/watch?v=CarotW-3Jfw

30. Our Position:
Traditional(Conventional) Methods ALL Stick to Quantity-Time
Measurement (by cup or turbin or any) to Yield Voiding Pattern

31. We Skip Q(t) Measurement and Direct to
Flow Pattern Observation by Doppler

32. We Skip Q(t) and Direct Doppler
Spectrum to Flow Pattern, Because --

33. Almost of Diagnosis Can Be Made
With How and How and How----

34. Our Doppler Based Flow Pattern
(Real Data)
Conventional Q(t) Based Flow Pattern
(scheme)
These are quite well DIAGNOSIS compatible

35. We tried this for 31 urinations of 22 volunteers, 16 males and 6
females, for 27 (87.1%) successful acquisition of this style of
diagnostic quality urination pattern data.
Failures all caused by wrong positioning or direction of transducer
Preclinical/Laboratory Test (2012-2013)

36. Conclusion 1
DIY Doppler Uroflowmetry = FEASIBLE
QUALITATIVELY same data available for diagnosis
Will replace conventional MESS-CUP type device
Will allow DIY personal/digital/self-managed
healthcare in urology discipline

37. Conclusion 2
CW-Doppler systems work 100%, at 40KHz.
Due to transducer bandwidth limitation, pulsed
Doppler system didn t work as expected.
Pulsed Doppler needs ultra-wideband transducer
for 40KHz, or must shift to >200KHz if using
conventional transducer design.

38. 24h 7d Pissing Boy
Julian @Bruxelles
Having Tail Pipe!!

39. W/W Highest Altitude Pissing Boy
Statue Iya Valley, Tokushima, Japan
(Actually NO pissing at all)

40. Thanks for Your Attention