Results 121 to 130 of about 1,316,261 (298)

The edge visualization metric: Quantifying the improvement of lung SBRT target definition with 4D CBCT

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Four‐dimensional cone‐beam CT (4D CBCT) incorporates oversampling of 3D data to reconstruct multi‐phase CBCT data sets representing distinct phases of the breathing cycle based on a diaphragmatic correlate of respiratory motion. Motion artifacts and blurring can be reduced relative to three‐dimensional cone‐beam (3D CBCT), allowing ...
Colton Baley, Sam Andersen, Clark Anderson, Shraddha Dalwadi, Daniel L. Saenz   +4 more
wiley   +1 more source

The overview effect: space exploration and human evolution [PDF]

, 1999
Frank White
openalex   +1 more source

UR‐cycleGAN: Denoising full‐body low‐dose PET images using cycle‐consistent Generative Adversarial Networks

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study aims to develop a CycleGAN based denoising model to enhance the quality of low‐dose PET (LDPET) images, making them as close as possible to standard‐dose PET (SDPET) images. Methods Using a Philips Vereos PET/CT system, whole‐body PET images of fluorine‐18 fluorodeoxyglucose (18F‐FDG) were acquired from 37 patients to ...
Yang Liu, ZhiWu Sun, HaoJia Liu
wiley   +1 more source

A Comprehensive Review of Path-Planning Algorithms for Planetary Rover Exploration

Remote Sensing
Path-planning algorithms for planetary rovers are critical for autonomous robotic exploration, enabling the efficient and safe traversal of complex and dynamic extraterrestrial terrains.
Qingliang Miao, Guangfei Wei
doaj   +1 more source

The scientific case for human space exploration [PDF]

, 2001
Ian Crawford
openalex   +2 more sources

Demonstration of an enhanced dosing pattern for debulking large and bulky unresectable tumors via differential hole‐size spatially fractionated radiotherapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose/objective We propose a novel lattice deployment for spatially fractionated radiotherapy (SFRT) treatments. In this approach, a larger diameter high‐dose sphere is centrally placed in the bulky tumor mass and surrounded by smaller diameter high‐dose spheres.
Joshua Misa, William St. Clair, Damodar Pokhrel   +2 more
wiley   +1 more source

A low-power high-speed smart sensor design for space exploration missions [PDF]

, 2000
Wai-Chi Fang
openalex   +1 more source

Exploring space

, 2003
Permite a los lectores investigar más allá de nuestro mundo, los objetos en el cielo nocturno y sus orígenes. Cómo se forman los planetas, lunas y otros cuerpos celestes y su composición química. Analizar los distintos tipos de la exploración del espacio, como los cohetes, telescopios y estaciones espaciales.
openaire   +1 more source

Dosimetric evaluation and clinical application of collimated apertures with proton beam line scanning in stereotactic radiotherapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Stereotactic radiotherapy (SRT) is a highly effective treatment with precision for small, localized lesions. Proton therapy, characterized by the Bragg peak, offers superior dose conformity compared to photon‐based approaches. However, challenges remain in minimizing lateral penumbra and optimizing dose delivery, particularly for small
Chen‐Yu Chou, Hsiao‐Chieh Huang, Shen‐Hao Lee, Shih‐Ming Hsu   +3 more
wiley   +1 more source

Intrigue and potential of space exploration [PDF]

A brief history of astronomy is presented. A chronology of events in the space program is summarized. The possibilities of interplanetary exploration are postulated.
Losh, H.
core   +1 more source