Aspects of Imaging and Counting in Nuclear Medicine Using Scintillation and Semiconductor Detectors

Beck, R.N.; Zimmer, L.T.; Charleston, D.B.; Hoffer, Paul B.

doi:10.1109/tns.1972.4326722

Cited by 16 publications

(3 citation statements)

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“…The scatter estimation employed by techniques such as the DEW method can be generalized as suggested by Beck [79]. He proposed that the weight given to each photon should not be just 1 or O (the standard energy window) or possibly -0.5 (DEW) depending on its energy, but rather generalized to any number, positive or negative, depending on parameters such as the energy, the detected position, and the relative abundance of photons at that energy.…”

Section: Triple Energy Windowmentioning

confidence: 99%

Analytical calculation of photon distributions in SPECT projections

Wells

Celler

Harrop

1998

IEEE Trans. Nucl. Sci.

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In this work is presented a method for analytically cdculating the distribution of photons detected in SPECT projections. The technique is appLicabIe to sources in homogeneous and non-homogeneous media. The photon distribution (primary, first and second order Compton scatter, and first order Rayleigh scatter) is computed using precdculated camera-dependent lookup tables in conjunction with an attenuation map of the scattering object aad a map of the activity distribution.The resdts of the technique are in excellent agreement with those of Monte Carlo simulation and experimental phantom studies. It has b e n validated with respect to sources in both homogeneous and noa-homogeneous media.Compared with a similar andyticd technique, it offers a factor of 40-60 decrease in the cdculation time for higher order Compton scatter distributions. For small sources, it improves on computation tirne required by Monte Carlo simulators by a factor of 20-150.Finally, this method has been applied to the problem of correcting for cross-taik in 1231-99mT~ dual-isotope SPECT studies. It has demonstrated the ability to accurately reproduce the shape of the cross-talk distribution and to reproduce the absolute activity of the sources to within 7%, dowing accurate removai of cross-talk contamination. Abstract. . 11

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Section: Triple Energy Windowmentioning

confidence: 99%

Analytical calculation of photon distributions in SPECT projections

Wells

Celler

Harrop

1998

IEEE Trans. Nucl. Sci.

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“…Film speed or sensitivity, S,, is typically defined as the reciprocal of the exposure required to produce a certain film density, such as a density of 1; thus, if iRE is the required exposure, equation (48) implies that the film speed is…”

Section: Film Responsementioning

confidence: 99%

“…(In some respects, this procedure is analogous to the well-known photographic technique for image sharpening called "unsharp masking.") It has been demonstrated that image sharpening can be achieved by scatter subtraction [48]; it will probably turn out to be more satisfactory, however, to allow scatter to augment the signal-to-noise ratio, and to perform image sharpening procedures at a later stage of the imaging process; that is, on-line in the recording system, as suggested in section 4.2.2.1, or off-line with analog or digital techniques.…”

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confidence: 99%

Advance in Fundamental Aspects of Imaging Systems and Techniques.

Beck¹,

Zimmer²,

Charleston³

et al. 1972

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Scatter correction in scintigraphy: the state of the art

et al. 1994

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In scintigraphy, the detection of scattered photons degrades both visual image analysis and quantitative accuracy. Many methods have been proposed and are still under investigation to cope with scattered photons. The main features of the problem of scattering in radionuclide imaging are presented first, to provide a sound foundation for a critical review of the existing scatter correction techniques. These are described using a classification relating to their aims and principles. Their theoretical potentials are analysed, as well as the difficulties of their practical implementation. Finally, the problems of their evaluation and comparison are discussed.

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Aspects of Imaging and Counting in Nuclear Medicine Using Scintillation and Semiconductor Detectors

Cited by 16 publications

References 0 publications

Analytical calculation of photon distributions in SPECT projections

Analytical calculation of photon distributions in SPECT projections

Advance in Fundamental Aspects of Imaging Systems and Techniques.

Scatter correction in scintigraphy: the state of the art

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