| US 7,613,277 B2 | ||
| Radiation imaging apparatus, radiation imaging system, and method of controlling radiation imaging apparatus | ||
| Katsuro Takenaka, Honjo (Japan); Tadao Endo, Honjo (Japan); Toshio Kameshima, Kumagaya (Japan); Tomoyuki Yagi, Honjo (Japan); and Keigo Yokoyama, Honjo (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Jul. 18, 2008, as Appl. No. 12/175,495. | ||
| Application 12/175495 is a continuation of application No. 11/755371, filed on May 30, 2007, granted, now 7,421,063. | ||
| Claims priority of application No. 2006-175568 (JP), filed on Jun. 26, 2006; and application No. 2007-125240 (JP), filed on May 10, 2007. | ||
| Prior Publication US 2008/0279334 A1, Nov. 13, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H05G 1/58 (2006.01) | ||
| U.S. Cl. 378—116 [378/91; 378/98.8] | 14 Claims |
| 1. A radiation imaging apparatus capable of taking a moving picture by acquiring a plurality of radiation image signals on
the basis of a plurality of times of irradiation with radiation pulses, the radiation imaging apparatus comprising:
a radiation detector having a two-dimensional array of pixels for detecting electric signals based on incident radiation rays;
a reading circuit configured to read image signals based on the electric signals;
an analog-to-digital convener configured to convert the electric signals read by the reading circuit into digital signals;
and
a controller configured to switch an operation status of the analog-to-digital convener in a period between a start of an
n-th time of irradiation with radiation pulse and a start of an (n+1)-th time of irradiation with radiation pulse, where n
is a natural number,
wherein the period includes at least a first period which includes an irradiation period in which the radiation detector is
irradiated with the n-th time radiation pulse and a second period in which the reading circuit reads the image signals, and
wherein the controller controls the analog-to-digital converter during the period so that power consumption of the analog-to-digital
converter in the first period is smaller than power consumption of the analog-to-digital converter in the second period.
|