To clinicians because they had no imaging or depth-perception Power motion-mode Doppler (PMD) to the single-channel TCD screen.īefore PMD, TCD provided only spectral waveforms that were not obvious ![]() Most important technical advancement has been the addition of Since the introduction of TCD by Rune Aaslid in 1982, the The latest book, Neuroimaging, An Issue of Neurologic Clinics, by Laszlo MechtlerĬontains the most up to date information regarding NeurologicĬlinics, and the use of transcranial Doppler (TCD). Neuroimaging, An Issue of Neurologic Clinics Watch video of ST3 used in diagnosing PFO, courtesy MSNBC and NBC News Channel. ![]() The Spencer Technologies ST3 was recently featured in an NBC report on the possible link between PFO and migraine. Our new address can be found in the Contact Us section. In August 2014 Spencer Technologies moved to Redmond Washington. Spencer Technologies Has Moved To Redmond Washington If you are still using the Trifid and are interested in upgrading to the Spencer Technologies' current TCD system, please contact for information on our trade-in incentive program. The Terumo Trifid model was manufactured exclusively for Terumo Cardiovascular Systems Corporation and production was discontinued in 2007. ![]() Spencer Technologies will no longer provide service, technical support, or accessories for the Terumo Trifid Transcranial Doppler.
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