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  • Title: In vivo 1H-NMR microimaging with respiratory triggering for monitoring adoptive immunotherapy of metastatic mouse lymphoma.
    Author: Fichtner KP, Schirrmacher V, Griesbach A, Hull WE.
    Journal: Magn Reson Med; 1997 Sep; 38(3):440-55. PubMed ID: 9339446.
    Abstract:
    The metastatic ESb-MP murine lymphoma in DBA/2 mice has been used as a model for investigating metastatic disease and its cure by adoptive immunotherapy (ADI) as monitored by in vivo multislice spin-echo 1H NMR microimaging at 7 T. isoflurane inhalation anesthesia facilitated long measurement sessions, and respiratory gating with a fiber-optic sensor greatly reduced motional artifacts. With T2 weighting (TR = 2 s, TE = 30 ms) mean signal-to-noise ratios of 30 and 15 for kidney and liver, respectively, were achieved in 20 min (100-micron pixels, 1-mm slices, 25-mm field of view). Without the use of contrast agents, metastases with diameters > or = 0.3 mm in the imaged plane could be detected as hyperintense lesions in kidney (contrast ratio ca. 1.4) and liver (contrast ratio ca. 2) with a confidence level of > 98%. For the first time the complete eradication of late-stage macroscopic metastases by ADI could be demonstrated noninvasively by MRI.
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