Designing a fully compensated half-metallic ferrimagnet

Recent experimental work on Mn2RuxGa demonstrates its potential as a compensated ferrimagnetic half-metal (CFHM). Here we present a set of high-throughput ab initio density functional theory calculations and detailed experimental characterisation, that enable us to correctly describe the nominal Mn2RuxGa thin films, in particular with regard to site-disorder and defects. We then construct models that accurately capture all the key features of the Mn-Ru-Ga system, including magnetic compensation and the spin gap at the Fermi level. We find that electronic doping is neccessary, which is achieved with a Mn/Ga ratio smaller than two. Our study shows how composition and substrate-induced biaxial strain can be combined to design a ferrimagnetic half-metal with a compensation point close to room temperature

The "dermal cage": a modification of the inferior pedicle breast reduction

In spite of more recent techniques for breast reduction, the inferior pedicle technique has proven to be enduring and still a very popular option in the plastic surgeon's armamentarium despite certain shortcomings. This technique is especially important for treating large breasts with a long sternal notch-to-nipple distance. The modifications we describe in this article overcome some of the main drawbacks of the standard inferior pedicle technique and make the procedure particularly effective when used on appropriately selected patients. This is achieved principally by the creation of a strong, durable, and internalized "dermal cage" that remains fixed to the chest wall in the upper part, as well as on both sides, to support the majority of the remaining breast tissue. This serves several purposes, including narrowing the breast thereby giving good projection and reduction of the N-IMF length of the inferior pedicle. Through suspension and fixation of the inferior pedicle to the chest wall, one can mitigate the effects of gravity on the inferior pedicle. The benefits of this include reduced tension on the T junction, thereby reducing the incidence of wound dehiscence in the immediate postoperative period, while reduction of tension on the nipple-areola complex reduces "bottoming" out over the long term. This process has been the main shortcoming of the inferior pedicle technique to date. The technique was used on 26 patients over a 7-year period with a mean long-term follow-up of 41 months. The results demonstrate the short- and long-term effectiveness of our own particular combination of modifications to previously described techniques and modifications of the inferior pedicle breast reduction. ----- LEVEL OF EVIDENCE V: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266

Clinical Best Practices for Radiation Safety During Lutetium-177 Therapy.

IMPORTANCE: 177 Lu therapy as part of theranostic treatment for cancer is expanding but it can be a challenge for sites with limited radiation protection staff to implement the radiation safety program required for therapeutic nuclear medicine. OBJECTIVE: To increase the adoption of 177 Lu therapy, especially in smaller centers and clinics, by providing a collection of radiation safety best practices and operational experience. To provide a resource for radiation safety officers supporting the implementation of a 177 Lu therapy program. METHODS: A panel of 11 radiation safety professionals representing sites across Canada and the United States with experience delivering 177 Lu therapy was assembled and discussed their responses to a list of questions focused on the following radiation safety topics: facility layout and design; radiation safety program; and drug management and patient care. RESULTS: A comprehensive set of best practice guidelines for clinical radiation safety during 177 Lu therapy has been developed based on the collective operational experience of a group of radiation safety professionals. Significant findings included that 177 Lu therapy is often safely administered in unshielded rooms, that staff radiation exposure associated with 177 Lu therapy is minimal relative to other nuclear medicine programs, and that some relatively simple preparation in advance including papering of common surfaces and planning for incontinence can effectively control contamination during therapy. CONCLUSION: The guidance contained in this paper will assist radiation safety professionals in the implementation of safe, effective 177 Lu therapy programs, even at smaller sites with limited to no experience in therapeutic nuclear medicine