公开(公告)号：US10104319B2

公开(公告)日：2018-10-16

申请号：US14623360

申请日：2015-02-16

Applicant: Hologic, Inc.

Inventor： Dhruvish Sudhirbhai Shah ,  Brad Polischuk ,  Eugene Palecki ,  Anthony Celona ,  Douglas Myers ,  Glenn Walker

IPC: H04N5/357 ,  H04N5/32 ,  H04N5/378

Abstract: In association with an imaging device which generates a portion of an image from a plurality of channels within a first row by sampling each channel during a sampling time corresponding to the channel, circuitry offsets sampling times of at least first and second channels within the first row, thereby reducing noise correlation between the first and second channels in the first row. Pixel sampling times may be defined by start times of the channels within a row, end times or both. Offsetting may be accomplished using a predetermined set of sampling time values or by randomizing sampling time values. Offsetting pixel sampling times of channels within a row relative to each other decorrelates channel sampling because different phases of the noise signal are sampled on each channel, effectively blurring or dithering the channel noise within each row. Random sampling within the channel, such as by varying a channel sampling time between rows, further dithers the noise within each channel. Undesirable correlated noise effects are reduced as a result.

公开(公告)号：US12059282B2

公开(公告)日：2024-08-13

申请号：US17276764

申请日：2019-09-16

Applicant: HOLOGIC, INC.

Inventor： Shusheng He ,  Brad Polischuk ,  Tuan Huynh

IPC: A61B6/50 ,  A61B6/04 ,  A61B6/42 ,  A61B6/02

CPC classification number: A61B6/502 ,  A61B6/0414 ,  A61B6/4291 ,  A61B6/025 ,  A61B6/4208

Abstract: A medical imaging system that includes a contoured radiation detector configured to receive radiation emitted from a radiation source after the radiation has passed through at least a portion of a patient. The contoured radiation detector includes a gate-wall end and lateral sides, including a right-hand side and a left-hand side. The contoured radiation detector may also includes a superior surface connected to the gate-wall end, right-hand side, and the left-hand side. The contoured radiation detector further includes a chest-wall surface, the chest-wall surface connected to the superior surface, the right-hand side, and the left-hand side, whereby the curvature is contoured to a chest wall of the patient. The system may also include an anti-scatter grid having a chest-wall surface with a similar curvature as the chest-wall surface of the contoured radiation detector.

公开(公告)号：US11950948B2

公开(公告)日：2024-04-09

申请号：US17277013

申请日：2019-09-17

Applicant: HOLOGIC, INC.

Inventor： Cornell Lee Williams ,  Brad Polischuk

IPC: A61B6/00 ,  G06T5/50 ,  G06T7/00

CPC classification number: A61B6/5258 ,  A61B6/542 ,  G06T5/50 ,  G06T7/0012 ,  G06T2207/10116

Abstract: Radiographic imaging techniques include the use of an exposure sequence having a plurality of specimen exposure windows. The plurality of specimen exposure windows have a total exposure time period that satisfies a desired exposure time. The plurality of exposure frames resulting from the plurality of specimen exposure windows are summed to form an output frame. The output frame is provided as output.

公开(公告)号：US20150281604A1

公开(公告)日：2015-10-01

申请号：US14623360

申请日：2015-02-16

Applicant: Hologic, Inc.

Inventor： Dhruvish Sudhirbhai Shah ,  Brad Polischuk ,  Eugene Palecki ,  Anthony Celona ,  Douglas Myers ,  Glenn Walker

IPC: H04N5/357 ,  H04N5/378 ,  H04N5/32

CPC classification number: H04N5/3575 ,  H04N5/32 ,  H04N5/378

Abstract: In association with an imaging device which generates a portion of an image from a plurality of channels within a first row by sampling each channel during a sampling time corresponding to the channel, circuitry offsets sampling times of at least first and second channels within the first row, thereby reducing noise correlation between the first and second channels in the first row. Pixel sampling times may be defined by start times of the channels within a row, end times or both. Offsetting may be accomplished using a predetermined set of sampling time values or by randomizing sampling time values. Offsetting pixel sampling times of channels within a row relative to each other decorrelates channel sampling because different phases of the noise signal are sampled on each channel, effectively blurring or dithering the channel noise within each row. Random sampling within the channel, such as by varying a channel sampling time between rows, further dithers the noise within each channel. Undesirable correlated noise effects are reduced as a result.

Abstract translation: 与通过在对应于该信道的采样时间期间对每个信道进行采样来生成来自第一行内的多个信道的图像的一部分的成像设备相关联，电路抵消第一行内的至少第一和第二信道的采样时间 从而降低第一行中的第一和第二通道之间的噪声相关性。 像素采样时间可以由一行中的通道的开始时间，结束时间或两者定义。 可以使用预定的采样时间值集合或通过随机化采样时间值来实现偏移。 对每个通道中的噪声信号的不同相位进行取样，对每行内的通道噪声进行模糊或抖动，从而使一行内的通道相对于彼此进行偏移的像素采样时间进行解相关。 通道内的随机采样，例如通过改变行之间的通道采样时间，进一步抖动每个通道内的噪声。 结果，减少了不期望的相关噪声效应。