SPENCER TECHNOLOGIES INC.
MELBOURNE, FLORIDA

Spencer Technologies will no longer provide service, technical support, or accessories for the Terumo Trifid Transcranial Doppler. The Terumo Trifid model was manufactured exclusively for Terumo Cardiovascular Systems Corporation and production was discontinued in 2007. If you are still using the Trifid and are interested in upgrading to the Spencer Technologies' current TCD system, please contact Spencer Technologies Has Moved To Redmond Washington In August 2014 Spencer Technologies moved to Redmond Washington. Our new address can be found in the The Spencer Technologies ST3 was recently featured in an NBC report on the possible link between PFO and migraine. “Since the introduction of TCD by Rune Aaslid in 1982, the most important technical advancement has been the addition of power motion-mode Doppler (PMD) to the single-channel TCD screen. Before PMD, TCD provided only spectral waveforms that were not obvious to clinicians because they had no imaging or depth-perception information attached to them, and multiple waveforms from different depths had to be put together to identify vessels and pathologic changes. PMD detects not only the presence of flow but also its depth, direction, and resistance to memorize these parameters.”