The mechanical index (MI) has been used by the US Food and Drug Administration (FDA)
since 1992 for regulatory decisions regarding the acoustic output of diagnostic ultrasound …

The shorter the wavelength (or higher the frequency), the better the resolution. Frequency
and wavelength are inversely related if the sound velocity within the medium remains …

Therapeutic uses of ultrasound include fragmentation of kidney stones, ablation of tumors
and newer applications, such as drug delivery and denervation. Suitable as a textbook or as …

Ultrasound is a commonly employed imaging modality in obstetrics and is generally
regarded as safe to the fetus. Current ultrasound technology, however, has significantly …

Objectives The growth in ultrasound usage necessitates concurrent growth in the number of
sonographers. Despite the increasing importance of ultrasound, there is a shortage of …

Objectives This study was created to assess the knowledge levels of postgraduate year 4
obstetrics and gynecology residents and maternal‐fetal medicine fellows in the United …

This review article combines the reports on the biophysical effects in ultrasonography and
provides the rationale behind the mechanical index (MI) and thermal index (TI) complying …

Shear wave elasticity imaging (SWEI) has found success in liver fibrosis staging. This work
evaluates hepatic SWEI measurement success as a function of push pulse energy using two …

Objective To review the biological effects and safety of obstetric ultrasound. Outcome Outline
the circumstances in which safety may be a concern with obstetric ultrasound. Evidence The …

Objectives To demonstrate the feasibility of 2‐dimensional brain ultrasound shear wave
elastography (SWE) and to define the average elasticity values of the gray and white matter …