Scan speed for transmission exposure reduction in a nuclear medi

X-ray or gamma ray systems or devices – Beam control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

378146, 25036304, G21K 510

Patent

active

056299710

ABSTRACT:
A scan speed procedure and method wherein a minimum radiation exposure period is determined on an object by object basis for a transmission study. Two transmission scans are performed including a prescan followed by a second transmission scan phase. The first transmission prescan is performed using a radiation source over the object. This prescan is of a rapid and predetermined duration (Tp). A resultant count density associated with the object is then generated and examined. The portion having the smallest count density (Cm) is determined and a value (Co) representing the minimum required number of counts for transmission study is given. From the above, a transmission period (Ts) is determined by the system and the second transmission scan phase is performed for the duration Ts using a multi-pass scan phase. The computed duration Ts represents the minimum exposure duration required to collect transmission data to ensure that the count density distribution associated with the object will contain at least Cm count density over each portion of the object.

REFERENCES:
patent: 5379333 (1995-01-01), Toth
patent: 5400378 (1995-03-01), Toth
patent: 5450462 (1995-09-01), Toth et al.
Patrick Tan, et al., A scanning Line Source for Simultaneous Emission . . . , The Journal of Nuclear Medicine, Oct., 1993, pp., 1752-1758.
R. J. Jaszczak, et al., Fast Transmission CT for Determining Attenuation Maps . . . , The Journal of Nuclear Medicine, Sep., 1993, pp. 1577-1586.
Eric C. Frey, et al., Simultaneous Acquisition of Emission and Transmission Data . . . , The Journal of Nuclear Medicine, Dec., 1992, pp. 2238-2245.
C. H. Tung, et al. Non-Uniform Attenuation Correction Using Simultaneous Transmission and Emission . . . , 0-70813-0513-2/92, pp. 2018-2022.
S. H. Manglos, Truncation artifact suppression in cone-beam radionuclide . . . , Phys. Med. Biol., 1992, pp. 549-562.
C.H. Tung, G.T. Gullberg, G.L. Zeng, P.E. Christian, F.L. Datz, H.T. Morgan, "Non-Uniform Attenuation Correction Using Simultaneous Transmission and Emission Converging Tomography", IEEE, pp. 2018-2022.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Scan speed for transmission exposure reduction in a nuclear medi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scan speed for transmission exposure reduction in a nuclear medi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scan speed for transmission exposure reduction in a nuclear medi will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1391749

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.