Deep Inspiration breath Hold facilitates surgical cavity registration on cone beam imaging for Partial breast irradiation.

BACKGROUND AND PURPOSE: The quality of the Cone Beam Computed Tomography (CBCT) images used for patient set-up is essential to avoid geographical miss when narrower margins or shorter fractionation are used for example in Accelerated Partial Breast Irradiation (APBI). This study evaluates deep inspiration breath hold (DIBH) with skin guided radiotherapy as a tool for image improvement reducing motion artifacts. MATERIALS AND METHODS: Daily CBCT images of left and right breast cancer patients with well-defined surgical cavity on CT simulation were used for this study. Only left sided CBCT were acquired with DIBH. Trained and experienced radiation therapists were asked to evaluate the image quality using a cavity visualization score (CVS), an image quality Likert score, and to perform registration shifts. Images were anonymized and therapists were blinded to the use of DIBH. RESULTS: Images from 21 patients, with 15 CBCT each, were evaluated by 6 radiation therapists, generating 4,015 evaluation points. Statistically significant improvements were observed in CVS and image quality (p < 0.001) with DIBH. Also, the rate of surgical cavity identification increased to 76 % with DIBH compared to 56 % without (p < 0.001). DIBH significantly reduced the inter-observer variability in registration shift corrections (p < 0.001) CONCLUSION: Utilizing DIBH for motion control improves both the image quality and the surgical cavity identification. This results in a decrease in registration variability, which is important for APBI accuracy.

Exclusive Breastfeeding: Barrier analysis amongst Omani mothers.

Objectives: This study aimed to examine individual barriers and supports to exclusive breastfeeding (EBF) and identify potential policy and programmatic interventions in Oman, where less than a quarter of Omani infants under six months are exclusively breastfed. Methods: A cross-sectional barrier analysis (BA) was carried out among a purposive sample of Omani women who were selected and interviewed by trained enumerators in health clinics in various parts of the country. A BA tool, adapted for the Omani context, covered 12 common determinants of behaviour adoption using open-ended questions regarding participants' perceptions about EBF including positive and negative consequences, self-efficacy and social norms. Qualitative analysis involved coding and tabulating as well as thematic analysis. Results: This study included a total of 45 'doers' (who exclusively breastfed their infants) and 52 'non-doers' (who did not). Mothers reported that motivations for EBF include the perception that it leads to healthier children and is easy to do, readily available and therefore convenient, as well as that there is an high level of family support for breastfeeding. Barriers included perceived milk insufficiency and mother's employment. Conclusion: To achieve the EBF target of 50% for 2025, public health action should focus on emphasising the benefits and convenience of EBF and building women's confidence in their ability to produce sufficient milk. These efforts will require increasing the knowledge and skills of community and healthcare workers and establishing monitoring mechanisms. Extended paid maternity leave and supportive workplace policies are necessary to encourage working women to exclusively breastfeed.