X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1997-03-04
1999-02-02
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378 8, H61B 603
Patent
active
058675558
ABSTRACT:
In a method for reducing a radiation dose in an x-ray CT (computed tomography) system, a maximum x-ray attenuation per projection is computed for every projection or for every n.sup.th projection and the measured angular attenuation profile for a last half rotation of the x-ray beam around a subject is stored, an extrapolation method is conducted for computing an extrapolated attenuation profile for a next half rotation based on the measured angular attenuation profile for the last half rotation, and a process is conducted for setting a dose level for the x-ray beam for a next projection, based on the extrapolated attenuation profile. The x-ray beam can be modulated, with characteristics of the beam modulation being set or controlled dependent on the extrapolated attenuation profile.
REFERENCES:
patent: 4174481 (1979-11-01), Liebetruth
patent: 5379333 (1995-01-01), Toth
patent: 5450462 (1995-09-01), Toth et al.
patent: 5485494 (1996-01-01), Williams et al.
patent: 5696807 (1997-12-01), Hsieh
"Das `Smart-Scan`-Verfahren der Spiral-Computeromographie: Eine neue Methode der Dosisreduktion," Giacomuzzi et al., Fortschr. Rontgenstr. 165.1 (1996) pp. 10-16, No Month.
"Dosisreduktion in der Computertomographie mit einem neuen Scan-Verfahren," Giacomuzzi et al., Akt. Radiol. vol. 6 (1996), pp. 110-113, No Month.
"Anatomisch adaptierte Variation des Rohrenstroms bei der CT," Kopka et al., Fortschr. Rontgenstr. 163.5, (1995) pp. 383-387, No Month.
Hentschel Dietmar
Popescu Stefan
Strauss Karl-Ernst
Wolf Heiko
Bruce David Vernon
Porta David P.
Siemens Aktiengesellschaft
LandOfFree
Adaptive dose modulation during CT scanning does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adaptive dose modulation during CT scanning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive dose modulation during CT scanning will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1124638