摘要:
An adjustable phantom (36) includes a base (202), an actuator (204) and a phantom (210). The phantom includes first (210a) and second portions (210b), each having a different value of a physical characteristic measured by a scanner (10). The phantom (210) is movable with respect to the base (202). In one embodiment, the phantom is well suited to simulating the arrival of contrast agent in a contrast enhanced imaging examination.
摘要:
An image processing apparatus (400) comprises a SIMD processor (401) which scans an image frame for regions of interest (step 301), for example corresponding to regions having objects or lines of interest. Each region of interest is rescanned to an orthogonal grid. The orthogonal grids are then floorplanned so that they are rearranged into a smaller subset of image lines. The floorplanning consists of mapping a set of rectangles into a compressed frame portion. Optionally, the rectangles can be rotated in order to allow the rectangles to be packed more densely. The SIMD processor (401) then processes the floorplanned image data (step 307). Once the image data has been processed by the SIMD processor, the DSP (405) re-associates the processed data (step 309), using information stored during floorplanning. The image processing apparatus results in a more efficient use of the SIMD processor (401).
摘要:
The invention relates to a method, to an X-ray apparatus for performing the method and to a detector arrangement intended for the latter, for producing X-ray images containing a reduced proportion of scattered radiation. The X-ray radiation is detected in this case by a detector arrangement comprising two X-ray detectors, there being provided in the first X-ray detector openings through which the second X-ray detector is able to detect scattered radiation and primary radiation by separate detector elements. The signals given by the second X-ray detector are used to determine the proportion of scattered radiation that is contained in the image produced by the first X-ray detector and to largely free the first image of the proportion of scattered radiation.
摘要:
Technique for deriving a graphical representation of domain-specific display-objects on an external display (13) within a patient-monitoring system (1), in which only a small amount of data has to be transmitted to the external display device (3) and at the same time the user of the external display (13) gets the same “look and feel” as he is used to from the built-in display (12) of a patient monitor (2).
摘要:
In an interventional breast procedure, a magnetic resonance tracking sequence (80) is executed to determine (i) tracked positions of a plurality of active probe tracking coils (50) disposed with a probe (42) of an interventional instrument (40) and (ii) tracked positions of one or more active assembly tracking coils (52) disposed with a breast coil assembly (20). A probe tip position and angulation respective to the breast coil assembly is determined (84) based on the tracked positions. Conformance with a probe trajectory (88) of the determined probe tip position and angulation respective to the breast coil is verified (92).
摘要:
A computed tomography scanner (10) includes a plurality of detector elements (100). The signals generated by the detector elements (100) may include an error component which can lead to artifacts in a reconstructed image. An apparatus includes a signal level detector (208) and a signal change detector (210) which evaluate the characteristics of a signal generated by a first detector element during the scan. The apparatus also includes a signal comparator (214) which evaluates a calibrated version of the signal generated by the first detector in relation to a signal generated by a second radiation sensitive detector element. Based on the results of the evaluations, a signal corrector (218) corrects temporal portions of the calibrated first detector signal which are suspected to lead to an artifact.
摘要:
The method (1) according to the invention may be schematically divided into three major phases. Phase (2) comprises step (3) of acquiring a suitable dataset, which is then subjected to a suitable binary segmentation at step (4) results of which are being accessed at step (5). The results comprise temporally sequenced binary coded images, whereby image portions corresponding to blood are labeled as unity, the rest is set to zero. The subsequent phase (12) of the method according to the invention is directed to performing the image processing for segmenting a structure. At step (8) a computation is performed whereby a preceding binary coded image (8a) corresponding to a phase from the temporal sequence is subtracted from a subsequent binary coded image 8b corresponding to a phase yielding a multi-dimensional temporal feature map (8c). At step (9) spatial positions corresponding to a certain voxel value are derived and are used to segment the structure. A pre-defined deformable shape model is accessed at step (11), which is then deformed at step (14) in accordance with spatial coordinates, derived at step (9). Preferably, the segmentation result is stored at step (16). Finally, during a further phase (22) of the method according to the invention, the segmentation results are displayed at step (18) using suitable display means. Preferably, the segmented surface is overlaid on the original data using a two, three or four-dimensional visualization technique. Still preferable, to ease comprehension of the result, the segmented surface is presented as a color-code in a suitable transparency mode. The invention further relates to an apparatus and a computer program for segmenting a structure in a dataset.
摘要:
An ionizing radiation detector module (22) includes a detector array (200), a memory (202), signal processing electronics (208), a communications interface (210), and a connector (212). The memory contains detector performance parameters (204) and detector correction algorithms (206). The signal processing electronics (208) uses the detector performance parameters (204) to correct signals from the detector array (200) in accordance with the detector correction algorithms (206).
摘要:
A physiological measurement device (10) that concurrently measures a physiological state of an individual and determines an identity of the individual includes at least a measurement component (12), an identification component (14), and processing component (16). The measurement component (12) measures the physiological state of the individual, and the identification component (14) concurrently determines the identity of the individual. The processing component (16) associates the physiological state of the individual with the identity of the individual.
摘要:
A data processing device, comprising a plurality of emitter antennas (140) arranged on a movable data acquisition device and adapted to emit electromagnetic radiation including data acquired by the movable data acquisition device, a plurality of receiver antennas (150) each adapted to receive the electromagnetic radiation emitted by each of the plurality of emitter antennas (140), and a data processing unit (118) coupled to the plurality of receiver antennas (150) and adapted to extract the data acquired by the movable data acquisition device from the electromagnetic radiation received by the plurality of receiver antennas (150).