Method and apparatus for determining depth of interactions...

Details Method and apparatus for determining depth of interactions... Method and apparatus for determining depth of interactions...

2007-05-15

2007-05-15

Hannaher, Constantine (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

Reexamination Certificate

active

11157313

ABSTRACT:
The present invention is directed to a system and method for efficiently and cost effectively determining an accurate depth of interaction for a crystal that may be used for correcting parallax error and repositioning LORs for more clear and accurate imaging. The present invention is directed to a detector assembly having a thin sensor (e.g., APD) deployed in front of the detector (the side where the radioactive source is located and the photon is arriving to hit the detector) and a second sensor (APD or photomultiplier) on the opposite side of the detector. The light captured by the two interior and exterior sensors which is proportional to the energy of the incident photon and to the distance where the photon was absorbed by the detector with respect to the location of the two sensors, is converted into an electrical signal and interpolated for finding the distance from the two sensors which is proportional to the location where the photon hit the detector.

REFERENCES:
patent: 6459085 (2002-10-01), Chang et al.
J. S. Huber, W. W. Moses, M. S. Andreaco, and O. Petterson, “A LSO Scintillator Array for a PET Detector Module with Depth of Interaction Measurement.” IEEE Trans. Nucl. Sci., vol. 48, pp. 684-688, Jun. 2001.

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