Raman optical cooling has been observed in structured fiber optics designed to enhance the Raman anti-Stokes emission through resonance. However, these approaches are not amenable to large area cooling under a portion of the solar spectrum. This work explores the use of planar structures to increase cooling efficiency, increase device area, broaden the working wavelength band, and reduce cost. Simple, planar structure require optical thin Raman shift layers. Since, so that a simple quarter-wave or series of quarter-wave reflector can be engineered to suppress the heat releasing Stoke’s shifted light. In-turn the main material challenges associated with ~ 10 nm crystalline films is the requirement for at least one dimension of the film to support domains (grain sizes) large enough to support the phonons needed for Raman scattering. As expected ten nanometer diamond particles do not appear to support the bulk-crystal phonon modes responsible for the 1332 cm-1 Raman shift suggesting new material approaches. A new scalable approach is presented and in parallel new applications such as water vapor recovery by cooling explored.
Mitral valve repair or replacement is important in the treatment of mitral regurgitation. For valve replacement, a transcatheter approach had the possibility of decrease the invasiveness of the procedure while retaining the benefit of replacement over repair. However, fluoroscopy images acquired during the procedure provide no anatomical information regarding the placement of the probe tip once the catheter has entered a cardiac chamber. By using 3D ultrasound and registering the 3D ultrasound images to the fluoroscopy images, a physician can gain a greater understanding of the mitral valve region during transcatheter mitral valve replacement surgery. In this work, we present a graphical user interface which allows the registration of two co-planar X-ray images with 3D ultrasound during mitral valve replacement surgery.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.