요속검사시 배뇨상황에 무관한 신호대잡음비 개선 기법
Enhancement of signal-to-noise ratio for uroflowmetric test regardless of urination situation
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참고문헌
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초록
Standard uroflowmetry measures the urine weight using single load cell to evaluate the urinary flow rate. Impact noise should be introduced due to gravity when the urine stream falls down into the container upon the load cell. The present study placed three load cells on the three vertices of a regular triangle and the three signals were ensemble averaged to enhance the signal-to-noise ratio(SNR) regardless of how the urination was made. Simulated urination experiment was performed with three different urine collection methods. In all three methods, SNR of the averaged signal was much higher than each load cell signals. With no urine collection device, the present signal averaging technique resulted in SNR values higher by 10~15 dB than when dual funnels or upper funnel were used to guide the urine stream. Therefore, it was demonstrated that the three point measurement followed by with ensemble averaging could enable accurate uroflowmetric test without any specially made urine collection devices.
Abstract
Standard uroflowmetry measures the urine weight using single load cell to evaluate the urinary flow rate. Impact noise should be introduced due to gravity when the urine stream falls down into the container upon the load cell. The present study placed three load cells on the three vertices of a regular triangle and the three signals were ensemble averaged to enhance the signal-to-noise ratio(SNR) regardless of how the urination was made. Simulated urination experiment was performed with three different urine collection methods. In all three methods, SNR of the averaged signal was much higher than each load cell signals. With no urine collection device, the present signal averaging technique resulted in SNR values higher by 10~15 dB than when dual funnels or upper funnel were used to guide the urine stream. Therefore, it was demonstrated that the three point measurement followed by with ensemble averaging could enable accurate uroflowmetric test without any specially made urine collection devices.
참고문헌 (14)
- 대한전립선학회, "전립선비대증", pp.3~15 (2004), 일조각
- B. K. Pradhan, "Morphogenesis of nodular hyperplasiaprostate", J. Urol., 113, pp.210~219 (1975)
- P. Abrams, "In support of pressure-flow studies dor evaluating men with lower urinary symptoms", Urology, 44, pp.153~155 (1994)
- E. Shapiro, "Pathophysiology of clinical benign prostatic hyperplasia", Urol. Clin. North Am., 22, pp.285~290 (1995)
- J. Y. Grayhack, "Changes with aging in human seminal vesicle fluid fructose concentration and seminal vesicle weight", J. Urol., 86, pp.142~ (1961)
- H. A. Guess, "Cumulative prevalence of prostatism matches the autopsy prevalence of benign prostatic hyperplasia", Prostate, 17, pp.241~246 (1990)
- C. G. Roehrborn, "Correlation between prostate size estimated by digital rectal examination and measured by transrectal ultrasound", Urology, 49, pp.548~557 (1997)
- M. D. Rifkin, "Endoscopic ultrasonic evaluation of the prostate using a transrectal probe: prospective evaluation and acoustic characterization", Radiology, 149, pp.265~271 (1983)
- M. J. Barry, "Correlation of the AUA symptom index with self administered versions of the Madsen-Iversen, Boyarsky and Maine medical assessment program symptom indexes", J. Urol., 148, pp.1558~1563 (1992)
- M. J. Barry, "The american urological association symptom index for benign prostatic hyperplasia", J. Urol., 148, pp.1549~1557 (1992), The Measurement Committee of the AUA
- 대한전립선학회, "전립선비대증", pp.127~146 (2004), 일조각
- 정도운, "로드셀을 이용한 요류검사기의 구현 및 평가", 센서학회지, 13(6), pp.436~445 (2004), 한국센서학회
- A. Fleisch, "Der pneumotachography: ein Apparatzur Beischwindgkeitregstrierung der Atemluft", Arch. Ges. Physiol., 209, pp.713~722 (1925)
- 김경아, "기능성 일회용 호흡관의 소형화 연구", 센서학회지, 14(4), pp.250~257 (2005), 한국센서학회