This study compares the performance of spin echo T1 with spiral k-space filling and three other techniques, for post contrast T1-weighted imaging of the brain. The lesion enhancement in each technique was evaluated after incremental fractional doses of gadolinium injection. The enhancement achieved on T1-FFE and T1-TSE techniques with full dose contrast could be achieved with 50% to 75% dose contrast in spiral imaging. Spiral imaging can thus be used to reduce the dose of injected contrast medium (by at least 25% and up to 50%) without compromising on the diagnostic quality of the post contrast study.
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