Line source for attenuation correction in nuclear medicine studi

Details Line source for attenuation correction in nuclear medicine studi Line source for attenuation correction in nuclear medicine studi

1995-06-16

1996-11-19

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

G01T 1161, G01T 1166

Patent

active

055765459

ABSTRACT:
In a system which corrects for attenuation artifacts in a SPECT study, a line source is parallel to the axis of rotation of the scintillation camera detector(s) and is scanned in a plane which is parallel to the detector. Advantageously, the line source is initially scanned at high speed across the detector to acquire preliminary transmission CT data and is subsequently scanned across the detector at lower speed to acquire additional transmission CT data. During rescanning, the shuttering of the line source, and/or the speed of the line source, is varied. This acquires transmission CT data which is more reliable and from which the attenuation of the patient may be more accurately calculated.

REFERENCES:
patent: 5479021 (1995-12-01), Morgan et al.
Tan et al., "A Scanning Line Source For Simultaneous Emission and Transmission Measurements in Spect", Journal of Nuc. Med., vol. No. 34, 10, 1993, pp. 1752-1758.
Jaszczak et al., "Fast Transmission CT For Determining, Attenuation Mars Using a Collimated Line Source, Rotatable Air-Copper-Lead Attenuators and Fan-Beam Couimation", Journal of Nuc. Med. vol. 34 No. 9, 1993, pp. 1578-1586.

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