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Titolo:
A NEW CORRECTION METHOD FOR GAMMA-CAMERA NONUNIFORMITY DUE TO ENERGY RESPONSE VARIABILITY
Autore:
BUVAT I; BENALI H; TODDPOKROPEK A; DIPAOLA R;
Indirizzi:
CHU PITIE SALPETRIERE,CNRS,INSERM,91 BLVD HOP F-75634 PARIS 13 FRANCE UNIV COLL LONDON,DEPT MED PHYS LONDON WC1E 6BT ENGLAND
Titolo Testata:
Physics in medicine and biology
fascicolo: 8, volume: 40, anno: 1995,
pagine: 1357 - 1374
SICI:
0031-9155(1995)40:8<1357:ANCMFG>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
ASYMMETRIC PHOTOPEAK WINDOWS; MEDICAL IMAGE SEQUENCES; SCATTER CORRECTION; RESOLUTION; SPECT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
16
Recensione:
Indirizzi per estratti:
Citazione:
I. Buvat et al., "A NEW CORRECTION METHOD FOR GAMMA-CAMERA NONUNIFORMITY DUE TO ENERGY RESPONSE VARIABILITY", Physics in medicine and biology, 40(8), 1995, pp. 1357-1374

Abstract

We present a new uniformity correction (Fourier energy correction) which is designed to correct for gamma camera non-uniformity caused by variations of the energy response function within a wide spectral range. A convolution model is used to describe the spatial distortions of the energy response function. The model is solved in Fourier space. A preliminary flood acquisition is required to obtain energy-dependent Fourier weights which are used to correct subsequent acquisitions. The influence of the parameters involved in the correction procedure is studied and the Fourier energy correction is compared to a conventional multiplicative energy correction for different acquisition geometries. The Fourier energy correction appears especially useful when the energy information associated with each detected photon is analysed using afine sampling, or when windows different from the photopeak window are used.

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Documento generato il 01/10/20 alle ore 15:59:28