The sexual experience of Italian adults during the COVID-19 lockdown.

From March 11 to April 26, 2020, the Italian government imposed a nationwide COVID-19 lockdown, a quarantine that resulted in significant restrictions on the movement and social contacts of the population, with a view to limiting the pandemic outbreak. The quarantine forced people to experience distorted social distance in two contrasting ways. For some people, it resulted in social distancing and isolation, for example by separating noncohabiting couples into different dwellings. For others, however, quarantine increased and imposed social closeness, forcing couples and families into constant, daily, and prolonged cohabitation. The aim of this study was to investigate the sexual health and behaviors of Italian adults during the lockdown period using a multimethod research. An open- and a closed-ended e-questionnaire were administered immediately after the end of the lockdown. A total of 465 Italian adults completed the digital questionnaire (female = 78.7%). Participants recognized their lived sexual experience with generally positive characteristics (related to openness, unproblematic relationship with the body, and awareness and self-reflection about one's sexuality), while negative thoughts such as worry and pain were quite scarce. Participants with a disability (5.6%) showed a marked inversion compared to the mean of respondents, recognizing themselves mainly in negative thoughts related to low self-esteem, inadequacy, and feelings of suffering, yet reporting a higher than mean level of arousal. In the qualitative analysis, the Frequency-Inverse Document Frequency (TF-IDF) index was computed to measure the salience of the word used by participants to respond to the open-ended five questions. It revealed a generally depressed emotional experience associated with the experience of lockdown, both in terms of desire, which seemed to be shifted more to the level of imagination and fantasies, and the actual possibility of experiencing sexual activity as usual. Nevertheless, the participants emphasized an opening to new possibilities in terms of expressing sexuality, accompanied by a rediscovery of the value of tenderness and affectivity as well as a clearer awareness of their sexual life, needs, and desires.

Validation of calculation algorithms for organ doses in CT by measurements on a 5 year old paediatric phantom.

Many organ dose calculation tools for computed tomography (CT) scans rely on the assumptions: (1) organ doses estimated for one CT scanner can be converted into organ doses for another CT scanner using the ratio of the Computed Tomography Dose Index (CTDI) between two CT scanners; and (2) helical scans can be approximated as the summation of axial slices covering the same scan range. The current study aims to validate experimentally these two assumptions. We performed organ dose measurements in a 5 year-old physical anthropomorphic phantom for five different CT scanners from four manufacturers. Absorbed doses to 22 organs were measured using thermoluminescent dosimeters for head-to-torso scans. We then compared the measured organ doses with the values calculated from the National Cancer Institute dosimetry system for CT (NCICT) computer program, developed at the National Cancer Institute. Whereas the measured organ doses showed significant variability (coefficient of variation (CoV) up to 53% at 80 kV) across different scanner models, the CoV of organ doses normalised to CTDIvol substantially decreased (12% CoV on average at 80 kV). For most organs, the difference between measured and simulated organ doses was within ±20% except for the bone marrow, breasts and ovaries. The discrepancies were further explained by additional Monte Carlo calculations of organ doses using a voxel phantom developed from CT images of the physical phantom. The results demonstrate that organ doses calculated for one CT scanner can be used to assess organ doses from other CT scanners with 20% uncertainty (k = 1), for the scan settings considered in the study.