V. M. García

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We tackle the parallelization of Non-Negative Matrix Factorization (NNMF), using the Alternating Least Squares and Lee and Seung algorithms, motivated by its use in audio source separation. For the first algorithm, a very suitable technique is the use of active set algorithms for solving several non-negative inequality constraints least squares problems. We(More)
OBJECTIVE To evaluate cortical brain blood flow by 99mTc-HMPAO SPECT in patients with Eating Disorders (ED): restrictive anorexia (RA) and purgative bulimia (PB). MATERIAL AND METHOD The study included 7 women with diagnostic criteria of RA and 12 with PB. The control group was made up of 12 healthy women. All subjects underwent brain 99mTc-HMPAO SPECT.(More)
Two cases with aphasic dysfunction with similar clinical features and structural neuroimaging studies results are presented. In these cases, brain perfusion SPECT was the most useful complementary study in the differential diagnosis of two pathologies with different etiologies: primary progressive aphasia or Mesulam's aphasia and aphasia secondary to a(More)
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