Automatic Segmentation of the Ribs, the Vertebral Column, and the Spinal Canal in Pediatric Computed Tomographic Images

We propose methods to perform automatic identification of the rib structure, the vertebral column, and the spinal canal in computed tomographic (CT) images of pediatric patients. The segmentation processes for the rib structure and the vertebral column are initiated using multilevel thresholding and the results are refined using morphological image processing techniques with features based on radiological and anatomical prior knowledge. The Hough transform for the detection of circles is applied to a cropped edge map that includes the thoracic vertebral structure. The centers of the detected circles are used to derive the information required for the opening-by-reconstruction algorithm used to segment the spinal canal. The methods were tested on 39 CT exams of 13 patients; the results of segmentation of the vertebral column and the spinal canal were assessed quantitatively and qualitatively by comparing with segmentation performed independently by a radiologist. Using 13 CT exams of six patients, including a total of 458 slices with the vertebra from different sections of the vertebral column, the average Hausdorff distance was determined to be 3.2 mm with a standard deviation (SD) of 2.4 mm; the average mean distance to the closest point (MDCP) was 0.7 mm with SD = 0.6 mm. Quantitative analysis was also performed for the segmented spinal canal with three CT exams of three patients, including 21 slices with the spinal canal from different sections of the vertebral column; the average Hausdorff distance was 1.6 mm with SD = 0.5 mm, and the average MDCP was 0.6 mm with SD = 0.1 mm

Timing of Immigration Effects Asset Change Among Hispanic Caregivers of Older Family Members

Given the cultural value of family in Hispanic culture, older Hispanic immigrants are likely to have family caregivers. This study examined the economic implications of caring for older Hispanic adults regarding non-housing financial wealth over time. Using the 2008, 2010, and 2012 waves of the Health and Retirement Study (HRS) and RAND HRS data files, this study compares changes in the non-housing financial wealth between 2008 and 2012 by caregiving and immigration status among Hispanics. This study examined differences in assets between Hispanic caregivers and non-caregivers and more specifically examined the subpopulation of Hispanic caregivers who immigrated prior to and after 1968 as compared to U.S.-born caregivers to better understand the effect of the Immigration and Nationality Amendment Act of 1965 on asset change. Results indicate that caregiving itself did not have a statistically significant association with wealth, but the timing of immigration to the US had a statistically significant correlation (p \u3c.05) with changes in the financial wealth. The findings of this study have implications for policy and program development targeting older adults and caregiving for this population

Parenting and late adolescents’ well-being in Greece, Norway, Poland and Switzerland : associations with individuation from parents

Cross-cultural studies focusing on individuation and parent-child relationships during late adolescence in the European context are sparse. This study investigated relationships between maternal and paternal responsiveness, demandingness and autonomy granting and late adolescents subjective well-being in Greece, Norway, Poland, and Switzerland. Additionally, the role of psychological, functional, and financial aspects of adolescents’ individuation in these relationships were assessed. Late adolescents (18-20-years-old, N=745) reported on their parents’ behaviors and themselves. Structural models with latent constructs were applied to test the hypothesized relationships. Results showed that in all four countries, maternal and paternal autonomy granting and responsiveness were positively associated with adolescents’ well-being. No significant results were found for demandingness. Further, the study found that psychological and functional connectedness with mothers and financial connectedness with fathers partially explained the associations between parenting behaviors and adolescents’ well-being. The results indicate more similarities than differences across Europe in the associations between parenting on late adolescents’ outcomes. More importantly, the study points out that maternal and paternal parenting may play different roles in late adolescenc