Thermal effects of fetal US remain uncertain

September 8, 2008 Diagnostic Imaging. Thermal effects of fetal US remain uncertain -------------------------------------------------------------------------------- A study on thermal effects of diagnostic fetal ultrasound could not confirm a causal relationship between exposure and obvious adverse effects. Study authors cautioned, however, that subtle effects cannot be ruled out and called for more research. The report, led by Dr. Jacques S. Abramowicz of Rush University Medical Center, cited lab animal studies showing that pulsed ultrasound can produce in vivo temperature elevations and damage in tissues, particularly bone. Human studies have not shown the same results, however.

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