Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Sanjiv S. Samant"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 954:162210
Compton backscatter imaging is a single-sided imaging technique and can be used as an excellent NDE tool for various applications. To develop an efficient and a high-resolution x-ray backscatter imaging system, a low-cost data acquisition electronic
Publikováno v:
2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).
This paper describes a proof of concept for Xray backscatter imaging beyond its common 2D radiograph capabilities by utilizing energy discrimination on detectors in an X-ray backscatter system. This study is a direct improvement over previous works,
Autor:
Jian Wu, Sanjiv S. Samant
Publikováno v:
Medical Physics. 34:2099-2112
In external beam radiation therapy, digitally reconstructed radiographs (DRRs) and portal images are used to verify patient setup based either on a visual comparison or, less frequently, with automated registration algorithms. A registration algorith
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 573:398-409
High-energy (megavoltage) X-ray imaging is widely used in industry (e.g., aerospace, construction, material sciences) as well as in health care (radiation therapy). One of the fundamental problems with megavoltage imaging is poor contrast and spatial
Autor:
Kathryn E, Mittauer, Rohan, Deraniyagala, Jonathan G, Li, Bo, Lu, Chihray, Liu, Sanjiv S, Samant, Judith L, Lightsey, Guanghua, Yan
Publikováno v:
Medical physics. 42(1)
Recent knowledge on the effects of cardiac toxicity warrants greater precision for left-sided breast radiotherapy. Different breath-hold (BH) maneuvers (abdominal vs thoracic breathing) can lead to chest wall positional variations, even though the pa
Autor:
Sanjiv S. Samant, A Gopal
Publikováno v:
Medical Physics. 33:2783-2791
Image quality in portal imaging suffers significantly from the loss in contrast and spatial resolution that results from the excessive Compton scatter associated with megavoltage x rays. In addition, portal image quality is further reduced due to the
Autor:
Jinesh Jain, Sanjiv S. Samant
Publikováno v:
IEEE Transactions on Electronics Packaging Manufacturing. 28:259-264
Multilayer circuit board technology offers the only feasible way to route high-density conductors through a narrow space. This technology has two limitations: the rigid multilayer circuit board typically used is not always compact enough for the appl
Theoretical analysis and experimental evaluation of a CsI(Tl) based electronic portal imaging system
Autor:
Herbert D. Zeman, Sanjiv S. Samant, Gunnar Lovhoiden, Amit Sawant, Frank A. DiBianca, Brent D. Weinberg
Publikováno v:
Medical Physics. 29:1042-1053
This article discusses the design and analysis of a portal imaging system based on a thick transparent scintillator. A theoretical analysis using Monte Carlo simulation was performed to calculate the x-ray quantum detection efficiency (QDE), signal t
Autor:
Alberto J. de Armendi, Laura Butler, John Stovall, Marc R. Sontag, Yunping Zhu, Thomas E. Merchant, Qing Ji, Sanjiv S. Samant, M. Waleed Gaber
Publikováno v:
International Journal of Radiation Oncology*Biology*Physics. 48:1233-1240
Purpose: To compare the accuracy of two immobilization techniques for pediatric brain tumor patients. Methods and Materials: We analyzed data from 128 treatments involving 22 patients. Patients were immobilized with either a relocatable head frame (1
Publikováno v:
Medical Physics. 43:3329-3329
Purpose: To develop a Monte Carlo N-Particle (MCNP) model for the validation of a prototype backscatter x-ray (BSX) imager, and optimization of BSX technology for medical applications, including selective object-plane imaging. Methods: BSX is an emer