摘要:
A workflow for a minimally invasive intervention, such as a treatment for a cancerous tumor, includes positioning a patient at a multi-functional imaging apparatus, obtaining pre-interventional images of the anatomy of the patient using a computed tomography or angiography imaging function, performing the minimally invasive intervention while the patient is positioned at the multi-functional imaging apparatus and while using a fluoroscopic imaging function, and performing a post-interventional imaging of the patient's anatomy while the patient is positioned at the multi-functional imaging apparatus using the computed tomography or angiographic imaging function. If the post-interventional imaging determines that additional intervention is in order, the additional intervention is performed while the patient is positioned at the imaging apparatus. Pre-intervention images and data sets from other sources may be combined with or used during the intervention. A treatment planning step may be included following the pre-interventional imaging and the intervention.
摘要:
A method and apparatus for generating at least one functional data set of a perfused region of the human or animal body are proposed. A first image data set is supplied comprising at least two images of the perfused region recorded at different times before and after an injection of contrast agent into a first artery supplying the region. A second image data set is supplied comprising at least two images of the perfused region recorded at different times before and after an injection of contrast agent into a second artery supplying the region. A first functional data set is generated by pixel-based calculation of at least one perfusion parameter from the first image data set. A second functional data set is generated by pixel-based calculation of at least one perfusion parameter from the second image data set.
摘要:
A method and apparatus for generating at least one functional data set of a perfused region of the human or animal body are proposed. A first image data set is supplied comprising at least two images of the perfused region recorded at different times before and after an injection of contrast agent into a first artery supplying the region. A second image data set is supplied comprising at least two images of the perfused region recorded at different times before and after an injection of contrast agent into a second artery supplying the region. A first functional data set is generated by pixel-based calculation of at least one perfusion parameter from the first image data set. A second functional data set is generated by pixel-based calculation of at least one perfusion parameter from the second image data set.
摘要:
A system and method of obtaining perfusion data for cerebral tissue is described. The system includes a C-arm X-ray device and a computing system configured to obtain sets of rotational projection X-ray data suitable for reconstructing 3D voxel data sets. A first data set is obtained of the patient, and then contrast material is injected into the vascular system to obtain a second 1 data set. A first voxel data set is subtracted from the second voxel data set, and the resultant data set is processed so as to segment the contrast-enhanced vasculature from the remaining data. The segmented voxels are subtracted from the resultant voxel data set, so as to yield a functional data set representing the difference between the attenuation of the tissues after administering contrast agent and the tissues prior to administering the contrast agent, without the contrast enhanced vasculature. The attenuation of the functional data set represents the perfusion or cerebral blood volume (CBV).
摘要:
A system and method of obtaining perfusion data for cerebral tissue is described. The system includes a C-arm X-ray device and a computing system configured to obtain sets of rotational projection X-ray data suitable for reconstructing 3D voxel data sets. A first data set is obtained of the patient, and then contrast material is injected into the vascular system to obtain a second 1 data set. A first voxel data set is subtracted from the second voxel data set, and the resultant data set is processed so as to segment the contrast-enhanced vasculature from the remaining data. The segmented voxels are subtracted from the resultant voxel data set, so as to yield a functional data set representing the difference between the attenuation of the tissues after administering contrast agent and the tissues prior to administering the contrast agent, without the contrast enhanced vasculature. The attenuation of the functional data set represents the perfusion or cerebral blood volume (CBV).
摘要:
There is described a method for a periodic and three-dimensional representation of a periodically variable structure. A number of rotation images is generated for this purpose. The required rotations relating to the same event of the periodic process are started at intervals offset by a defined angle. From the rotation images, new image series are assembled with which three-dimensional representations relating to different phase ranges of the period are reconstructed.
摘要:
The invention relates to an angiographic x-ray diagnostic device for rotation angiography with an x-ray emitter which can be moved on a circular path about a patient located on a patient support table, with an image detector unit which can moved on the circular path facing the x-ray emitter, with a digital image system for recording a plurality of projection images by means of rotation angiography, with a device for image processing, by means of which the projection images are reconstructed into a 3D volume image, and with a device for correcting physical effects and/or inadequacies in the recording system such as truncation correction, scatter correction, ring artifact correction, correction of the beam hardening and/or of the low frequency drop for the soft tissue display of projection images and the 3D volume images resulting therefrom.
摘要:
The invention relates to a method for a three-dimensional representation of a moving structure by a tomographic method, in which during one recording pass a series of projection recordings is registered by an imaging unit at different recording angles between a start position and an end position, it being possible to reconstruct three-dimensional image data from the projection recordings with the following steps: a) generation of tomosynthesis projection recordings along a tomosynthesis scanning path; b) interpolation of the data of the tomosynthesis projection recordings in accordance with an interpolation algorithm in order to generate a projection data set; c) use of a tomosynthesis reconstruction method on the projection data set in order to generate a tomosynthesis volume image; d) repetition of steps b) and c) for all times of interest, and e) display of tomosynthesis representations from the tomosynthesis volume images.
摘要:
The invention relates to a method for a three-dimensional representation of a moving structure by a tomographic method, in which during one recording pass a series of projection recordings is registered by an imaging unit at different recording angles between a start position and an end position, it being possible to reconstruct three-dimensional image data from the projection recordings with the following steps: a) generation of tomosynthesis projection recordings along a tomosynthesis scanning path; b) interpolation of the data of the tomosynthesis projection recordings in accordance with an interpolation algorithm in order to generate a projection data set; c) use of a tomosynthesis reconstruction method on the projection data set in order to generate a tomosynthesis volume image; d) repetition of steps b) and c) for all times of interest, and e) display of tomosynthesis representations from the tomosynthesis volume images.
摘要:
To enable an artifact free reconstruction even in the case of large regions of interest and with scanning paths of below 360°, provision is made for a method, with which a three-dimensional image volume is reconstructed from a number of two-dimensional projection images of a region of interest, which were recorded about the region of interest during a rotation of a recording system, comprising an x-ray source with a focal point and a detector, by calculating the gray scale values of the voxels of the image volume by back projection of the projection images, with which each two-dimensional projection images is composed in each instance from at least two individual projection images to form an extended two-dimensional projection image, with the respectively at least two individual projection images being recorded with a constant relative position between the focal point and the region of interest.