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Measurement of the speed of sound in follicular fluid

Gooding, M J ; Barber, D ; Kennedy, S H ; Noble, J A

Human reproduction (Oxford, England), February 2005, Vol.20(2), pp.497-500 [Tạp chí có phản biện]

ISSN: 0268-1161 ; PMID: 15618259 Version:1

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  • Nhan đề:
    Measurement of the speed of sound in follicular fluid
  • Tác giả: Gooding, M J ; Barber, D ; Kennedy, S H ; Noble, J A
  • Chủ đề: Follicular Fluid -- Diagnostic Imaging ; Infertility, Female -- Diagnostic Imaging ; Ultrasonography -- Standards
  • Là 1 phần của: Human reproduction (Oxford, England), February 2005, Vol.20(2), pp.497-500
  • Mô tả: Measurement of ovarian follicles by ultrasound is common practice in fertility treatment. However, the effect of the speed of sound is not taken into account. We present results from a study aimed at measuring this. The speed of sound was measured in samples of follicular fluid aspirated from patients undergoing fertility treatment. The transmitted and received pulses from a single element ultrasound transducer were recorded using a digital oscilloscope for a pulse passed through a sample of the fluid. The distance over which the pulse travelled was known from calibration with pure water. Variation with temperature was investigated in the range 25-45 degrees C. Dependence on ultrasound frequency, patient and time from aspiration were also investigated. The speed of sound in follicular fluid was found to be 1550+/-3 m/s at 37.3 degrees C using 5.0 MHz ultrasound. The speed varied from 1528+/-3 m/s at 24.8 degrees C to 1561+/-3 m/s at 44.8 degrees C. Variation with patient, time and frequency were not detected. The speed of sound in follicular fluid at body temperature is 1550 m/s. This small difference from the speed assumed by the ultrasound machine corresponds to the systematic bias in volume measurement evident in previously published results.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0268-1161 ; PMID: 15618259 Version:1

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