Results 181 to 190 of about 13,148 (240)

Determining Exciton Diffusion Length in Organic Semiconductors: Unifying Macro‐ and Microscopic Perspectives

Advanced Energy Materials, EarlyView.
Exciton diffusion length in organic semiconductor films is determined from encounter/annihilation rates. Non‐normalized exciton densities and proper intrinsic lifetime reference avoid over‐parametrization of the fits. Monte Carlo Simulation of individual molecule‐to‐molecule hops reproduce these results (②) when matching lattice constant and hoping ...
Wenchao Yang, Catherine S. Pursglove De Castro, Safakath Karuthedath, Yuliar Firdaus, Nisreen Alshehri, Si Chen, Diego Rosas Villalva, Christopher E. Petoukhoff, Amr Dahman, Derya Baran, Thomas D. Anthopoulos, Frédéric Laquai, Julien Gorenflot   +12 more
wiley   +1 more source

Single Photon Emission Computed Tomography [PDF]

, 1995
Since the introduction of single photon emission computed tomographic (SPECT; abbreviated SPET in Europe) techniques during the 1960s,123,124 SPECT has become a routine part of virtually every nuclear medicine department. With SPECT, by moving the gamma camera or cameras around the patient and viewing the object from at least 180°, a three-dimensional (
Mark W. Groch, William D. Erwin, John A. Bieszk   +2 more
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Single photon emission computed tomography

Computerized Radiology, 1985
Single photon emission computed tomography (SPECT) is becoming an increasingly important part of routine clinical nuclear medicine. By providing tomographic reconstructions in multiple planes through the patient, SPECT expands the clinical applications in nuclear medicine as well as providing better contrast, edge definition and separation of target ...
C.W. Piez, B.L. Holman
openaire   +3 more sources

Single photon-emission computed tomography

Journal of Nuclear Cardiology, 2010
Publisher Summary This chapter discusses single photon emission computed tomography. The development of single photon emission computed tomography (SPECT) put a powerful physiologic imaging technology in the hands of physicians and researchers. SPECT is neither as expensive nor as complex as positron emission tomography (PET) and can be used for many
Edward P. Ficaro, Diwakar Jain, Mylan C. Cohen, Mouaz H. Al-Mallah, Michael R. Freeman, Dennis A. Calnon, Donna M. Polk, Robert C. Hendel, Prem Soman, Kenneth Nichols, Scott Leonard, Frank P. DiFilippo, Thomas A. Holly, Brian G. Abbott   +13 more
openaire   +2 more sources

Single photon emission computed tomography in epilepsy

Seminars in Nuclear Medicine, 1990
Functional brain imaging by either single photon emission computed tomography (SPECT) or positron emission tomography (PET) is now a well-established technique in the diagnosis and evaluation of the epilepsies. Perhaps only in stroke have these emerging technologies proven of greater significance. Scalp, cortical, or depth electroencephalographic (EEG)
Richard W. Homan, Michael D. Devous, Robert Leroy   +2 more
openaire   +3 more sources

Single Photon Emission Computed Tomography Tracer

2020
Single photon emission computed tomography (SPECT) is the state-of-the-art imaging modality in nuclear medicine despite the fact that only a few new SPECT tracers have become available in the past 20 years. Critical for the future success of SPECT is the design of new and specific tracers for the detection, localization, and staging of a disease and ...
Roger Schibli, Roger Schibli, Cristina Müller, Constantin Mamat, Hans-Jürgen Pietzsch   +4 more
openaire   +3 more sources

Single-photon emission-computed tomography (SPECT) [PDF]

, 1998
Abstract Although the principles of single-photon ennssioncomputed tomography (SPECT) have been well understood for many years and several centres were using SPECT clinically in the late 1960s and early 1970s, there has been a dramatic increase in the number of SPECT installations in recent years. In the early 1980s, however, SPECT was a
Howard G. Gemmell, Roger T. Staff
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Single Photon Emission Computed Tomography of the Thyroid*

The Journal of Clinical Endocrinology & Metabolism, 1988
Single photon emission computed tomography (SPECT) entails imaging at multiple positions along an arc and computed-assisted reconstruction of transaxial, coronal, and sagittal images. To determine if SPECT imaging of the thyroid augments information provided by planar imaging, both SPECT and pinhole planar scans were performed in 52 patients with ...
Norman LaFrance, James J. S. Chen, David S. Cooper, Maria D. Allo, Paul W. Ladenson   +4 more
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SPECT: SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY

Journal of Computer Assisted Tomography, 1980
Interest in single photon emission computed tomography (SPECT) has been renewed as a result of the successful application of transmission (x-ray) CT to diagnostic radiology. Many aspects of SPECT are different from those encountered in transmission CT, and often are more difficult to overcome.
R. Edward Coleman, Chun Bin Lim, Ronald J. Jaszczak   +2 more
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Single Photon Emission Computed Tomography

2006
Conventional gamma cameras provide two-dimensional planar images of three-dimensional objects. Structural information in the third dimension, depth, is obscured by superimposition of all data along this direction. Although imaging of the object in different projections (posterior, anterior, lateral, and oblique) gives some information about the depth ...
openaire   +3 more sources