Layered tissue models are developed to estimate in situ ultrasound intensity during common
obstetric examinations by incorporation of measured overlying tissue thicknesses with data …

Objective: The purpose of the current study was to determine in vivo, tissue-specific
ultrasonic attenuation coefficients for each of the tissue layers comprising the anterior …

Measurements of minimum and average total tissue thicknesses overlying the fetus during
the third trimester were taken on 52 patients between 24 and 40 weeks gestation. Minimum …

Determination of in situ ultrasound exposures in experimental animals and patients is
necessary to assess any potential hazard of ultrasound implied by reported biological effects …

Halpern EJ. Calculation of tissue attenuation with a clinical ultrasound unit. Invest Radiol
1993; 28: 598-603. RATIONALE AND OBJECTIVES. Five alternative methods for estimating …

The thickness of various underlying tissue layers were measured at locations where the
overall thickness and, therefore, the ultrasound attenuation prior to the fetus appeared …

A specialized in vivo exposimetry system was developed to acquire transabdominal in situ
ultrasound exposure quantities in obstetric patients. Under surgical conditions, the sterilized …

Safety assurance for diagnostic ultrasound in obstetrics began with a tacit assumption of
safety allowed by a federal law enacted in 1976 for then-existing medical ultrasound …

The prediction of the acoustic levels occurring in a patient during ultrasound examination is
important for the assessment of equipment safety. While considerable effort has been …

Medical diagnostic ultrasound has been in use for over 40 years, having found widespread
applications in ana-tomic imaging and blood flow velocity measurement in virtually all areas …