No abstract

Objectives: Sheehan's syndrome (SSH) is an important public health problem characterized as postpartum hypopituitarism secondary to obstetric complications-related ischemic pituitary necrosis that shows significant systemic metabolic repercussion. Thus, this study aimed to evaluate texture parameters in digital panoramic radiographs of patients with SSH. Methods: A case-control study was conducted with 30 SSH patients from an Endocrinology and Diabetology Service of reference in Brazil, and 30 age-and sexmatched healthy controls. A custom computer program measured fractal dimension, lacunarity and some morphologic features in the following mandibular regions of interest (50x50 pixels): below the mental foramen (F1), between the first and second molars (M1), and center of the mandibular ramus (R1). Results: The fractal analysis showed a statistically significant difference between the studied groups in all regions of interest. The fractal dimension in F1 (p = 0.016), M1 (p = 0.043), and R1 (p = 0.028) was significantly lower in SSH group, as well as lacunarity in R1 (p = 0.008). Additionally, several morphologic features were statistically significant in the SSH group (p < 0.05). Conclusion: Therefore, individuals with SSH showed altered imaging texture parameters on panoramic radiographs, which reflect a smaller spatial organization of the bone trabeculae and, possibly, a state of reduced mineral bone density.

Avaliação radiográfica da silhueta cardíaca pelo método vertebral heart size em cães da raça Yorkshire Terrier clinicamente normais

RESUMODeterminaram-se os parâmetros ecocardiográficos em modo-M normais de cães da raça Yorkshire Terrier. Foram utilizados 30 cães clinicamente sadios, com peso médio de 2,420,64kg e idades entre um e seis anos. O diâmetro do átrio esquerdo e da aorta, a dimensão interna do ventrículo esquerdo na diástole e na sístole, a espessura do septo interventricular na diástole e na sístole, e a espessura da parede posterior do ventrículo esquerdo na diástole e na sístole correlacionaram-se com o peso corporal. As demais variáveis do modo-M não se correlacionaram com peso corporal, sexo ou idade. Os valores ecocardiográficos obtidos neste estudo podem ser utilizados como referência para cães dessa raça.Palavras-chave: cão, ecocardiografia, modo-M, coração ABSTRACT The aim of this study was to establish the normal echocardiographic parameters in M-mode for Yorkshire Terrier dogs. Thirty clinically normal dogs with mean weight of 2.420.64kg and ages varying from one to six years old were studied. The left atrial diameter, the aortic diameter, the left ventricular internal dimension at end-diastole and end-systole, end-diastolic and end-systolic interventricular septal thickness, and end-diastolic