As a relatively young additive manufacturing technology, Electron Beam Powder Bed Fusion (EB-PBF) attracts increasing attention in academics and industry. Especially, the last five years have seen an explosion machine process development as well material research for EB-PBF. Compared to other approaches, e.g., more widely used laser powder bed fusion, EB-PBF shows various unique features advant...

Introduction: Intraoperative electron radiation therapy (IOERT) is one of the cancer treatment techniques that delivers high doses to tumor bed during surgery. IOERT can be performed by either conventional LINACs or dedicated IORT accelerators such as LIAC (Light Intraoperative Accelerator). Two types of applicators can be used with LIAC dedicated accelerator including conventi...

Background:  After breast conserving surgery, most recurrences occur around the primary tumor site. This justifies the use of boost radiotherapy to the primary site of tumor. Surgical scar is not always a good surrogate for the location of the lumpectomy cavity. The aim of this study was to evaluate ultrasonic guidance for detection of the lumpectomy cavity after breast conserving surgery ...

The effective absorptivity of IR laser light for different powder beds were studied. reflectivity aluminum, titanium, stainless steel and copper alloys was measured using an appropriate Ulbricht sphere. Laser irradiation reliably detected by a photodiode. Reflectivity carefully as function illuminated area bed density. Several size distributions thicknesses chosen to evaluate the impact on abso...

Abstract The number of mirror segments, geometry and orientation are essential parameters when assessing the beam-shaping capabilities deformable mirrors. Here, we use a Liquid Crystal on Silicon Spatial Light Modulator (LCoS-SLM) to mimic mechanical design quantitatively analyse effect segments their geometrical structure resulting structured modes. Our approach can be used as test bed prior d...

background and objectives: hospital is the largest and most costly operating unit of healthcare system. provision of optimal care requires that hospital administrators identify hospital performance based on relevant indicators. this study used the pabon lasso analysis to assess the performance of hospitals and identify strategies towards an improved hospital performance.   methods: this cross-s...

Abstract Purpose Multi Jet Fusion™ (MJF) is a powder bed fusion technology that fuses material locally with infrared radiation. Fabricated parts show high mechanical strength, low porosity and good dimensional accuracy, even for challenging geometries. They do, however, have distinctive grainy surface roughness of Ra > 5 μm limiting possible applications. A fairly recent the smoothing polish...

Single-wall carbon nanotubes (SWNTs) were arranged in a membrane similar to a "bed-of-nails", in which a single layer of parallel SWNTs was densely packed and aligned along the normal to the membrane. The planar, free-standing, ultrathin SWNT membranes were prepared by milling a neat SWNT fiber with a gallium focused ion beam. The approach is readily applicable to cutting nanotubes to a desirab...

Breast conserving surgery with adjuvant radiation therapy is supported by mult iple clinical t rials as being a safe alternative to total mastectomy. 2 Outlined by Arm I of RTOG Protocol 1005, 1 one current standard of care for external beam radiation (EBRT) is delivery of 50 Gray (Gy) in 25 fract ions to the whole breast with a sequential 12 Gy photon or electron boost to the post-lumpectomy b...

This paper reveals a new high-power beam dump concept developed at SLAC. Its principal features are relatively low production costs, simple-assembly procedures , compactness, and rather high power absorption capacity. The main power absorption medium is a water-cooled bed of 1 cm diameter aluminum spheres contained in a tube. This " Sphere Beam Dump " is rated at 500 kW and its production costs...