Low Magnetic Field MRI for the Diagnosis of Intracranial Metastatic Tumor

Objective To appraise the low magnetic field MRI for the diagnostic value of intracranial metastatic tumor.Methods The magnetic resonance plain scan,the FIR,and the enhancement scanning(with 0.2 ml/kg of Gd-DTPA vein injection) were performed in 30 cases with intracranial metastatic tumor by using open nuclear magnetic resonance imaging system of 0.3 T.Results Of 30 cases,single lesions were found in 8 cases,and multi-lesions in 22 cases.54 lesions were detected with normal MRI scanning,72 lesions detection by FIR,and 96 lesions detection by enhancement scanning and 54 cavitates addition of these 96 lesions.Of 65 lesions were more than 3 cm in diameter.Minimum in these lesions diameter was 3 mm.The average 2.7 lesions in each case were detected.Conclusion MRI was a potential method for the definite diagnosis on intracranial metastatic tumor,especially,the low magnetic field MRI play an key role on not only finding out the tiny and privileged site metastasis but also observing the borderline shape and interior circumstance on the lesions so as to make out treatment plan.