( 1 ) Trabalho apresentado à Segunda Reunião Brasileira da Ciência do Solo, realizada no Instituto Agronômico de Campinas, de 11 a 22 de julho de 1949, e adaptado à revista "Bragantia".
This work presents methods for estimating relaxation times T1 and T2 and proton density using a real time digital video processor. This device performs each mathematical step of the fitting algorithms in one video frame interval (1/30 s). Two-point fits of T1 and T2 may be generated in approximately 15 video frame intervals or about 0.5 s; generation of a T2 image from four acquired images requires about 30 video frame intervals or about 1 s. The hardware is common to many commercial MR scanners and requires no array processor. Such high-speed techniques can expedite the clinical use of computed images and facilitate the implementation of image synthesis.
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