摘要:
In phase-contrast imaging, different types of image information, such as absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process and have different image properties. A frequency dependent combination of different types of image information is obtained, the combined image having improved properties over the image information and respective image information types. Accordingly, an apparatus and a method for image processing in X-ray imaging of an object is provided, including receiving first and second image information of the object of first and second image information types, respectively, where the second image information type is different from the first image information type. The first and second image information is combined to obtain combined image information of the object, where the combined image information is frequency-dependent, depending on spatial frequencies of the first and second image information, respectively.
摘要:
A processing component (122) processes images based on an iterative reconstruction algorithm with regularization and/or de-noising algorithm. The processing component includes a set point determiner (224) that determines a quality set point (216) between predetermined lower and upper quality bounds (226) based on a quality variable (228) indicative of an image quality of interest. The processing component further includes a comparator (214) that compares, each processing iteration, a quality metric of a current generated image with the quality set point and generates a difference value indicative of a difference between the quality metric and the quality set point. The processing component further includes a regularization factor updater (220) that generates an updated regularization factor for a next processing iteration based on a current value (222) of the regularization factor and at least the quality metric in response to the difference value indicating that the quality metric is outside of a predetermined range about the quality set point.
摘要:
An imaging system includes radiation source (106) that emits radiation that traverses an examination region and a portion of a subject therein and a detector array (114) that detects radiation that traverses the examination region and the portion of the subject therein and generates a signal indicative thereof. A volume scan parameter recommender (120) recommends at least one spectral scan parameter value for a volume scan of the portion of the subject based on a spectral decomposition of first and second 2D projections acquired by the radiation source and detector array. The first and second 2D projections have different spectral characteristics. A console (122) employs the recommended at least one spectral scan parameter value to perform the volume scan of the portion of the subject.
摘要:
A method includes planning a head scan of a subject via a console (716) of an imaging system (700), wherein the head scan scans both jaws of the subject, including metallic dental fillings of teeth of the subject, scanning the subject 108, including the metallic dental fillings of the teeth of the subject, via the imaging system, wherein the subject has a dental metal artifact reduction device(802) installed in their mouth during the scan, and generating projection data indicative of the scanned region of the head of the subject, including the metallic dental fillings of the teeth of the subject.
摘要:
In phase-contrast imaging, different types of image information, such as absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process and have different image properties. A frequency dependent combination of different types of image information is obtained, the combined image having improved properties over the image information and respective image information types. Accordingly, an apparatus and a method for image processing in X-ray imaging of an object is provided, including receiving first and second image information of the object of first and second image information types, respectively, where the second image information type is different from the first image information type. The first and second image information is combined to obtain combined image information of the object, where the combined image information is frequency-dependent, depending on spatial frequencies of the first and second image information, respectively.
摘要:
The invention relates to an image generation apparatus for generating an image of an object. An image providing unit (11, 16) provides a first image of the object and a second image of the object, wherein the first image has a smaller noise level than the second image. A display window providing unit (12) provides a display window being indicative of the range of image values shown on a display (14), and a combining unit (13) generates a combination image by combining the first image and the second image depending on the window width of the provided display window. This allows considering the influence of the display window on the noise appearance. Thus, by taking into account the first image and the second image having different noise levels and the provided display window, a combined image can be generated, which has an improved noise appearance.
摘要:
Soft body tissue, such as a female breast, is imaged using X-ray projection techniques and optical tomography techniques. First image data for a first image of a breast (17) are acquired by X-ray projection using an X-ray source (3) and an X-ray detector (5). Second image data for a second image are acquired using optical tomography equipment comprising a light source (9) and a light detector (11). From the first image data, estimated bulk optical properties of the breast (17) are be derived. Based on such estimated bulk optical properties, an optical tomography image is reconstructed from the second image data with high image quality. Performing mammography acquisition at different compression states of the breast (17) improves patient comfort. Mammograms are acquired at two different compression states wherein a first compression state is adapted to provide high image resolution. At a second compression state, another mammogram may be acquired together with an optical tomography image. The two mammograms are used for image registration thereby possibly providing information for a deformation transform. Additional information on tissue composition within the breast is received by acquiring the first and second mammogram at different X-ray settings.