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  • Title: T2 relaxometry of ring lesions of the brain.
    Author: Jayakumar PN, Srikanth SG, Chandrashekar HS, Subbakrishna DK.
    Journal: Clin Radiol; 2007 Apr; 62(4):370-5. PubMed ID: 17331832.
    Abstract:
    AIM: To differentiate two common aetiologies of "ring lesions," tuberculomas and cysticercal cysts, using T2 relaxometry. MATERIALS AND METHODS: Fifty-five ring-enhancing lesions of the brain (32 cysticercal cysts; 23 tuberculomas) in 27 patients with focal seizures were studied for T2 relaxation times. RESULTS: The mean T2 relaxation times of cysticercal cysts was 617 ms (range 305-1365 ms; SD 272.2) and that of tuberculomas 161 ms (range 83-290 ms; SD 60.3; 95% confidence). CONCLUSION: T2 relaxometry is a simple, reliable and valuable non-invasive magnetic resonance imaging (MRI) technique to differentiate between intracranial cysticercal cysts and tuberculomas, and may be incorporated in routine diagnostic protocols.
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