Now showing items 1-10 of 1383
Phase-only optical encryption based on the zeroth-order phase-contrast technique
(SPIE-SOC PHOTOPTICAL INSTRUMENTATION ENGINEERS, 2009)
A phase-only encryption/decryption scheme with the readout based on the zeroth-order phase-contrast technique (ZOPCT), without the use of a phase-changing plate on the Fourier plane of an optical system based on the 4f ...
First experiments on diffraction-enhanced imaging at LNLS
(Blackwell MunksgaardCopenhagenDinamarca, 2003)
Optimal Dual-VENC Unwrapping in Phase-Contrast MRI
(Institute of Electrical and Electronics Engineers Inc., 2019)
© 2018 IEEE. Dual-VENC strategies have been proposed to improve the velocity-to-noise ratio in phase-contrast MRI. However, they are based on aliasing-free high-VENC data. The aim of this paper is to propose a dual-VENC ...
When the non-contrast-enhanced phase is unnecessary in abdominal computed tomography scans? A retrospective analysis of 244 cases
(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2013-07-01)
Objective: To evaluate the necessity of the non contrast-enhanced phase in abdominal computed tomography scans. Materials and Methods: A retrospective, cross-sectional, observational study was developed, evaluating 244 ...
O valor da fase sem contraste na tomografia computadorizada do abdome
(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2008-10-01)
OBJECTIVE: To determine the role of the unenhanced phase of abdominal computed tomography in patients without a definite diagnosis or undergoing tumor staging. MATERIALS AND METHODS: A prospective and transversal study was ...