The contrast-to-noise ratio (CNR) is defined as the difference in signal contribution (signal intensity [SI]) between different tissues, divided by the background noise (N). For example, the contrast between cerebrospinal fluid (CSF) and white matter (WM) is given by (SI CSF SI WM )/N...
Since the x-ray photons are information carriers, the noise effect is expected to decrease with increasing exposures. Indeed, it may be observed that SNR increases as a function of N because the noise equals the square root of the signal. However, since all imaging techniques are based on ...
Contrast-enhanced (CE) dual-energy (DE) x-ray breast imaging uses a low- and high-energy x-ray spectral pair to eliminate soft-tissue signal variation and ... R,Karunamuni,A,... - 《Physics in Medicine & Biology》 被引量: 11发表: 2014年 Signal to noise and contrast ratio enhancement...
Real-time temporal maximum-intensity-projection imaging of hepatic lesions with contrast-enhanced sonography. OBJECTIVE: We sought to perform a preliminary evaluation of temporal maximum intensity projection (MIP) of focal hepatic masses in selected patients. The t... SR Wilson,HJ Jang,TK Kim,......
(1,2).CBCTisconsideredtobeanaccurateimaging modalityfordentaldiagnosisandtreatmentplanpurposes (3,4).Patient’sage,gender,medicalanddentalhistory, andsocialsituationarealwaysconsideredwhenbuilding atreatmentplan.Radiologicalservicesofferedarerelated toalmostallofthedentaleldsincludingoralsurgery ...
The intrinsic signal-to-noise ratio in NMR imaging. Magn. Reson. Med. 1986; 3: 604–618. Article PubMed CAS Google Scholar Haacke EM, Brown RW, Thompson MR, et.al. Magnetic Resonance Imaging: Physical Principles and Sequence Design. New York: John Wiley & Sons, 1999, especially Ch ...
Summary The contrast-to-noise ratio (CNR) is presented and characterized as a tool for quantitative noise measurement of scanning electron microscope (SEM)... F Timischl - 《Scanning》 被引量: 3发表: 2015年 Z-contrast Imaging in an Aberration-corrected Scanning Transmission Electron Microscope Ne...
Increasing the darkfield contrast-to-noise ratio using a deconvolution-based information retrieval algorithm in X-ray grating-based phase-contrast imaging. A novel information retrieval algorithm for X-ray grating-based phase-contrast imaging based on the deconvolution of the object and the reference ...
WAVE SCATTERING AND IMAGING Diagnostic Ultrasound Imaging Book2004, Diagnostic Ultrasound Imaging Thomas L. Szabo Explore book 8.4.4 Contrast The effect of speckle can be quantified by a “contrast ratio” (CR) and a signal-to-noise ratio (SNR). A classic imaging problem is quantifying the abil...
Molecular photoacoustic imaging has shown great potential in medical applications; its sensitivity is normally in pico-to-micro-molar range, dependent on exogenous imaging agents. However, tissue can produce strong background signals, which mask the sign