Groupwise Multimodal Image Registration using Joint Total Variation

In medical imaging it is common practice to acquire a wide range of modalities (MRI, CT, PET, etc.), to highlight different structures or pathologies. As patient movement between scans or scanning session is unavoidable, registration is often an essential step before any subsequent image analysis. In this paper, we introduce a cost function based on joint total variation for such multimodal image registration. This cost function has the advantage of enabling principled, groupwise alignment of multiple images, whilst being insensitive to strong intensity non-uniformities. We evaluate our algorithm on rigidly aligning both simulated and real 3D brain scans. This validation shows robustness to strong intensity non-uniformities and low registration errors for CT/PET to MRI alignment. Our implementation is publicly available at https://github.com/brudfors/coregistration-njtv

Effects of recombinant LH supplementation to recombinant FSH during induced ovarian stimulation in the GnRH-agonist protocol: a matched case-control study

<p>Abstract</p> <p>Background</p> <p>Some studies have suggested that the suppression of endogenous LH secretion does not seem to affect the majority of patients who are undergoing assisted reproduction and stimulation with recombinant FSH (r-FSH). Other studies have indicated that a group of normogonadotrophic women down-regulated and stimulated with pure FSH preparations may experience low LH concentrations that compromise the IVF parameters. The present study aimed to compare the efficacy of recombinant LH (r-LH) supplementation for controlled ovarian stimulation in r-FSH and GnRH-agonist (GnRH-a) protocol in ICSI cycles.</p> <p>Methods</p> <p>A total of 244 patients without ovulatory dysfunction, aged <40 years and at the first ICSI cycle were divided into two groups matched by age according to an ovarian stimulation scheme: Group I (n = 122): Down-regulation with GnRH-a + r-FSH and Group II (n = 122): Down-regulation with GnRH-a + r-FSH and r-LH (beginning simultaneously).</p> <p>Result(s)</p> <p>The number of oocytes collected, the number of oocytes in metaphase II and fertilization rate were significantly lower in the Group I than in Group II (<it>P </it>= 0.036, <it>P </it>= 0.0014 and <it>P </it>= 0.017, respectively). In addition, the mean number of embryos produced per cycle and the mean number of frozen embryos per cycle were statistically lower (<it>P </it>= 0.0092 and <it>P </it>= 0.0008, respectively) in Group I than in Group II. Finally the cumulative implantation rate (fresh+thaw ed embryos) was significantly lower (<it>P </it>= 0.04) in Group I than in Group II. The other clinical and laboratory results analyzed did not show difference between groups.</p> <p>Conclusion</p> <p>These data support r-LH supplementation in ovarian stimulation protocols with r-FSH and GnRH-a for assisted reproduction treatment.</p

Diagnosis of human strongyloidiasis using particulate antigen of two strains of Strongyloides venezuelensis in indirect immunofluorescence antibody test

991525

Ultrasound guidance is not necessary during easy embryo transfers

Purpose: To determine whether the use of ultrasound (US) to guide embryo transfer (ET) in a population previously defined as likely to have easy transfer would change the implantation and pregnancy rates in an ICSI program.Methods: A total of 100 patients identified as likely to have easy transfer after mock transfer were divided into two groups: Group I, US-guided ET (N = 50) and Group II, ET without the aid of US (N = 50).Results: Implantation and pregnancy rates were similar (p = 0.51, p = 0.29) for Group I (19.6%,42%) and Group II (16.3%,30%), as also was the abortion rate (p = 0.55) (Group I: 1/21; Group II: 2/15).Conclusion: As long as previous mock transfers are routinely performed during a cycle preceding assisted reproduction and the clinician considers transfer to be easy, ultrasound does not benefit the process of embryo transfer

Best site for embryo transfer: the upper or lower half of endometrial cavity?

BACKGROUND: the objective of the present study was to determine the importance of the site of embryo transfer (upper or lower half endometrial cavity) on implantation and clinical pregnancy rates. METHODS: A total of 400 transfers guided by ultrasound were randomly assigned to two groups according to the distance between the uterine fundus and the catheter tip at the time of embryo placement. Group I (n=200) consisted of transfers corresponding to a distance of 0.05) between groups I and II. No significant difference in implantation or pregnancy rates was observed between groups I and II. CONCLUSION: the implantation or pregnancy rates were similar whether the embryos were deposited in the upper or lower half of the endometrial cavity

Ciência, meio ambiente e qualidade de vida: uma proposta de pesquisa para uma universidade comprometida com sua comunidade Science, environment and quality of life: a research proposal for an university concerned with its community development

O trabalho focaliza educação e saúde como pontos de partida para a mudança social em busca de melhoria na qualidade de vida. Mudanças requerem quantidade e qualidade de trabalho que não podem acontecer sem elevar o nível educacional, como conhecimento, capacidade crítica e habilidades profissionais, e sem saúde, entendida como precondições físicas e psíquicas para a ação. A ciência é vista como processo de descoberta e geração de conhecimento necessários para as mudanças sociais, mas historicamente não tem sido usada para a melhoria da qualidade de vida. Papel importante cabe à universidade em reverter tal processo. Argumenta-se que a universidade que pretenda atuar na melhoria da qualidade de vida no meio ambiente em que se insere, necessariamente, terá que orientar suas linhas de pesquisa, ensino e extensão, na busca de alternativas de serviços e bens de qualidade aos menos afortunados, a partir de problemas sociais, num enfoque interdisciplinar, ao invés de abordagens segmentadas do conhecimento.<br>Education and health are argued to be the starting points for social change toward a better quality of life. Social changes require quantity and quality of work which cannot be possible without increasing population's level of education, as knowledge, criticisms and professional capabilities, and without health, seen as physical and psychic pre-conditions for action. Science is seen as a discovering process and knowledge generation required to produce social change, but historically, quality of life has not been of great concern for science. This paper assumes that a great deal is given to the university in order to reverse that process. It is argued that an university that intends to improve quality of life must direct researching, teaching and extension programs for better services and goods alternatives for the poor, focusing social problems, on a multidisciplinary fashion