X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2003-06-24
2004-10-26
Bruce, David V (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
C378S015000, C378S901000
Reexamination Certificate
active
06810102
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates generally to methods and apparatus for computed tomographic (CT) image reconstruction, and more particularly to methods and apparatus for a truncation compensation scheme.
Under some scanning conditions, portions of a patient may extend beyond the region measured by a detector, which may lead to image artifacts and an incomplete representation of the imaged object. Some known methods have been published that address the artifact reduction but not the imaging of the portion of the patient that is outside the field of view (FOV). However, it is desirable to image the portion of the patient that extends beyond the FOV.
BRIEF DESCRIPTION OF THE INVENTION
In one aspect, a method is provided. The method includes augmenting partially sampled field of view data using fully sampled field of view data.
In another aspect, an imaging apparatus is provided. The imaging apparatus includes a radiation source, a detector responsive to radiation positioned to receive radiation emitted from the source, and a computer operationally coupled to the radiation source and the detector. The computer is configured to receive data from a Computed Tomography (CT) scan of an object, where the data includes fully sampled field of view data and partially sampled field of view data. The computer is further configured to augment the received partially sampled field of view data using the fully sampled field of view data, and reconstruct an image of the object using the fully sampled field of view data and the augmented partially sampled field of view data.
In a further aspect, a computer readable medium is provided which is encoded with a program configured to instruct a computer to augment partially sampled field of view data, and reconstruct an image using the fully sampled field of view data and the augmented partially sampled field of view data.
REFERENCES:
patent: 4136388 (1979-01-01), Lindquist
patent: 4189775 (1980-02-01), Inouye et al.
patent: 4305127 (1981-12-01), Heuscher
patent: 4446521 (1984-05-01), Inouye
patent: 4550371 (1985-10-01), Glover et al.
patent: 4878169 (1989-10-01), Toner et al.
patent: 5043890 (1991-08-01), King
patent: 5276614 (1994-01-01), Heuscher
patent: 5640436 (1997-06-01), Kawai et al.
patent: 5953388 (1999-09-01), Walnut et al.
patent: 6307909 (2001-10-01), Flohr et al.
patent: 2004/0066909 (2004-04-01), Lonn et al.
US 5,299,248, 3/1994, Pelc (withdrawn)
Arduini Peter Joseph
Armstrong Robert H.
Hsieh Jiang
Senzig Robert F.
Armstrong Teasdale LLP
Bruce David V
GE Medical Systems Global Technology Company LLC
Horton Esq. Carl B.
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