A new method to correct the attenuation map in simultaneous transmission/emission tomography using153Gd/67Ga radioisotopes

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A new method to correct the attenuation map in simultaneous transmission/emission tomography using 153Gd/67Ga radioisotopes

Reconstruction of the tomographic images without attenuation correction can cause erroneously high count densities and reduced image contrast in low attenuation regions. In order to solve the problem of photon attenuation, one needs to know the attenuation coefficient for the individual patient being studied. Therefore, we made an attempt to correct the attenuation map in simultaneous transmiss...

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SPECIAL CONTRIBUTIONS Determination of the Attenuation Map in Emission Tomography

Reliable attenuation correction methods for quantitative emission CT (ECT) require accurate delineation of the body contour and often necessitate knowledge of internal anatomic structure. Two broad classes of methods have been used to calculate the attenuation map: transmissionless and transmission-based attenuation correction techniques. Whereas calculated attenuation correction belonging to t...

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Determination of the attenuation map in emission tomography.

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ژورنال

عنوان ژورنال: Journal of Medical Physics

سال: 2012

ISSN: 0971-6203

DOI: 10.4103/0971-6203.92720