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Abstract: The Scheimpflug condition is performed by tilting the lens such that the object plane, the lens plane and the image plane intersect in a common line. In this paper, two parameters are added ...

Abstract: Air-coupled ultrasound (ACU) is increasingly used for nondestructive testing (NDT). With ACU, no contact or coupling agent (e.g., water and ultrasound gel) is needed between transducers and ...

Treatment concept During static arc delivery, the patient is placed in an upright position and rotated to the planned treatment angles; the beam is switched off during rotation and only delivered in ...

In my opinion, the Bahtinov mask is one of the most useful inventions for astrophotography. The traditional use of a Bahtinov mask is for focusing a telescope only and is not used for collimation of ...

This study presents an optimization method for arranging lattice radiotherapy (LRT) targets to enhance the contrast between peak and valley doses, aiming to improve the treatment effectiveness and ...

This alignment laser is fast and simple to build, and easy to move around the lab. It can be used for most alignment tasks, from simple arrangements (e.g. placing a few mirrors) to complex systems ...

Introduction: Radio-guided surgery can reduce surgical invasiveness, improve accuracy, and minimize complications. Representative applications include breast and malignant sentinel lymph node biopsy ...

Single-photon emission computed tomography (SPECT) is an important tool for myocardial perfusion imaging (MPI). Mechanical collimators cause the resolution-sensitivity trade-off in the existing ...

Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems, Harbin Institute of Technology, Shenzhen 518055, P. R. China School of Electronic ...

The big day’s here: Your first telescope has arrived. You’ve done your research and decided on an 8-inch Dobsonian-mounted reflector, or perhaps a 4-inch refractor, or another model that had a great ...