Abstract: A method for ascertaining a fluid-dynamic characteristic value of a resilient vascular tree, through which a fluid flows in a pulsating manner, is provided. At least one 2D projection, respectively, of the resilient vascular tree is generated by a projection device from different angles of projection, and a digital 3D reconstruction of the vascular tree is generated by an analysis device based on of the 2D projections. A geometry of at least one vessel of the resilient vascular tree is estimated based on the 3D reconstruction, and at least one fluid state in the resilient vascular tree is ascertained from the geometry and predetermined resilient properties of the resilient vascular tree. The at least one fluid-dynamic characteristic value is calculated as a function of the at least one fluid state.

Abstract: A device is disclosed for determining and visualizing the perfusion of the myocardial muscle with the aid of static CCTA images. In at least one embodiment, the device includes a segmentation unit for segmenting the coronary blood vessels and the left myocardial muscle from a CCTA image of the heart; a first simulation unit for simulating the blood flow through the coronary blood vessels; and a second simulation unit by which the local perfusion of the myocardial muscle is determined on the basis of the ascertained blood flow into different regions of the myocardial muscle. The perfusion of the different regions of the myocardial muscle is visualized in a schematized image on a visualization unit. By virtue of the proposed device it is possible to dispense with further imaging examinations after the performance of a CCTA scan, thereby relieving the pressure both on the part of the physician and on the part of the patient.

Abstract: A method and system for automatically associating coronary arteries with regions of the myocardium to which the arteries supply blood is described. The method uses three dimensional image data of a patient, and an axial image slice is used to identify candidate locations of the aorta. Candidate aorta centroid locations are evaluated to eliminate spurious identifications, and the identified aorta is used to locate the left ventricle of the heart with respect thereto. Arteries of the coronary artery tree may be located by segmentation of contrasted images, and the individual arteries may be identified by skeletonization of the segmented arteries. The skeletonized arteries are projected onto an image of the patient heart, and may be associated with specific regions of the myocardium.

Abstract: A computer system for image processing has a first working environment with a first program for image processing, as well as a second working environment, logically separated from the first working environment, with a second program for image processing. The first working environment is implemented on a first server. Furthermore, the first working environment is designed to receive a first command to execute the first program and a second command to execute the second program, and to send the second command to the second working environment. The second working environment is designed to send an image processed by the second program to the first working environment . The communication of a user with the first and second program thus occurs via a uniform platform in the form of the first working environment, and the integration of the second program for image processing into the workflow is facilitated.

Abstract: An embodiment of a CT system includes a computer unit and at least one memory device for storing program code and projection data records, established during a CT scan and usable for reconstructing CT renderings. The computer unit is connected in a networked system with at least one external diagnosis computer including a memory with program code for diagnosing reconstructed visual CT renderings. A method for reconstructing and diagnosing visual CT renderings is also disclosed. In an embodiment, a request for reconstructing a CT data record with a projection data record stored in the computer unit is received, sent from a diagnosis computer in a diagnosis station, by the computer unit of the CT system via the communications network; the computer unit recognizes this request; the computer unit automatically executes the requested reconstruction and the reconstructed CT rendering is transmitted to the requesting diagnosis computer via the communications network.

Abstract: A method and an imaging system are disclosed. The method, for determining at least one value of at least one recording parameter for a recording of an X-ray image of a patient positioned on an examination table, uses contactless scanning of at least part of the surface of the patient via at least one electromagnetic sensor, to calculate the three-dimensional contour of the scanned surface without additional exposure to radiation. At least one anatomic landmark of the patient can be identified using the three-dimensional contour, and the position of the anatomic landmark is determinable in the coordinate system of the table. The value of the recording parameter is determinable using the position of the anatomic landmark. The value of the recording parameter is determinable quickly and easily since contactless scanning of surfaces can be achieved quickly and easily in terms of technology.

Abstract: A device is disclosed for determining and visualizing the perfusion of the myocardial muscle with the aid of static CCTA images. In at least one embodiment, the device includes a segmentation unit for segmenting the coronary blood vessels and the left myocardial muscle from a CCTA image of the heart; a first simulation unit for simulating the blood flow through the coronary blood vessels; and a second simulation unit by which the local perfusion of the myocardial muscle is determined on the basis of the ascertained blood flow into different regions of the myocardial muscle. The perfusion of the different regions of the myocardial muscle is visualized in a schematized image on a visualization unit. By virtue of the proposed device it is possible to dispense with further imaging examinations after the performance of a CCTA scan, thereby relieving the pressure both on the part of the physician and on the part of the patient.

Abstract: A method is disclosed for automatically selecting a scanning protocol for a tomographic recording of an X-ray image of a patient in that at least one patient-specific value is retrieved in the internal memory of a first computer. The patient-specific value can in particular be a measure of the anticipated X-ray absorption by the patient. The method includes automatically comparing the patient-specific value with retrievably stored reference values, wherein one scanning protocol can be associated with each reference value. Finally, a scanning protocol is automatically selected by way of the first computer using the comparison. Selection is simplified by automation of selection of the scanning protocol since no manual selection of the scanning protocol has to be made. Automatic selection of a suitable scanning protocol is also quicker than a manual selection.

Abstract: A control method is disclosed for determining a quality indicator of medical technology recording results data from a tomography scan of an examination structure, which scan is supported by a contrast agent, by way of a tomography system. According to an embodiment of the invention, at least one control parameter value is automatically derived from the recording results data in respect of a contrast agent image region during and/or directly after the tomography scan, which value represents a quality of the recording results data in the contrast agent image region. A control system for such a determination is also disclosed.

Abstract: A method and CT system are disclosed for recording and distributing whole-body CT data of a polytraumatized patient. In at least one embodiment the method includes producing a whole-body topogram including division and assignment of z-coordinate regions of the whole-body topogram to different body regions; performing a whole-body CT scan with the recording of CT raw data; assigning the CT raw data to the different body regions; reconstructing CT image datasets on a computer of the CT system; and sending only body region-specific CT image datasets to a number of remote workstations operated by technical specialists.

Abstract: In a method and apparatus to automatically generate a selected image data set from an entirety of medical measurement data of an examination subject, the entirety of the measurement data of the examination subject is received as input data, and at least a portion of the measurement data is automatically analyzed with regard to a number of specific, topologically representative content feature parameter values of the examination subject selected measurement data from the entirety is made, with the selected data associated with defined, specific, topologically representative content feature parameter values. The selected measurement data are assembled into a selected image data set, as output data.

Abstract: A device is disclosed for determining and visualizing the perfusion of the myocardial muscle with the aid of static CCTA images. In at least one embodiment, the device includes a segmentation unit for segmenting the coronary blood vessels and the left myocardial muscle from a CCTA image of the heart; a first simulation unit for simulating the blood flow through the coronary blood vessels; and a second simulation unit by which the local perfusion of the myocardial muscle is determined on the basis of the ascertained blood flow into different regions of the myocardial muscle. The perfusion of the different regions of the myocardial muscle is visualized in a schematized image on a visualization unit. By virtue of the proposed device it is possible to dispense with further imaging examinations after the performance of a CCTA scan, thereby relieving the pressure both on the part of the physician and on the part of the patient.

Abstract: A device is disclosed for determining and visualizing the perfusion of the myocardial muscle with the aid of static CCTA images. In at least one embodiment, the device includes a segmentation unit for segmenting the coronary blood vessels and the left myocardial muscle from a CCTA image of the heart; a first simulation unit for simulating the blood flow through the coronary blood vessels; and a second simulation unit by which the local perfusion of the myocardial muscle is determined on the basis of the ascertained blood flow into different regions of the myocardial muscle. The perfusion of the different regions of the myocardial muscle is visualized in a schematized image on a visualization unit. By virtue of the proposed device it is possible to dispense with further imaging examinations after the performance of a CCTA scan, thereby relieving the pressure both on the part of the physician and on the part of the patient.

Abstract: A method for determining functional severity of a stenosis includes: (a) generating a simulated perfusion map from a calculated blood flow; (b) comparing the simulated perfusion map to a measured perfusion map to identify a degree of mismatch therebetween, the measured perfusion map representing perfusion in a patient; (c) modifying a parameter in a model used in calculating the blood flow when the degree of mismatch meets or exceeds a predefined threshold; (d) computing a hemodynamic quantity from the simulated perfusion map when the degree of mismatch is less than the predefined threshold, the hemodynamic quantity being indicative of the functional severity of the stenosis; and (e) displaying the hemodynamic quantity. Systems for determining functional severity of a stenosis are described.

Abstract: A method for automatic detection of a contrast agent inflow in a blood vessel of a patient with a CT system, and CT system for carrying out this method, are disclosed. At least one embodiment of the invention relates to a method which determines the position of at least one blood vessel in section image representations in a CT examination without external intervention with the aid of an active shape or active appearance model, measures the inflow of contrast agent in this region in a targeted way and automatically initiates at least one action in the event of inflowing contrast agent.

Abstract: A method is disclosed for determining bone mineral density values of an object. In an embodiment, the method includes acquisition of first two-dimensional projection overview image data of the object to be examined in an image detail with a first X-ray energy; acquisition of at least second two-dimensional projection overview image data of the object to be examined in an image detail with at least one different second X-ray energy; determining a bone overview image data record using the first and second projection overview image data; determining at least one specific evaluation region of the image detail using the bone overview image data record; and determining a bone mineral density value for the specific evaluation region of the image detail using the image data of the bone overview image data record in the specific evaluation region. A computerized tomography system for implementing a method is also disclosed.

Abstract: A method and system for non-invasive assessment of coronary artery stenosis is disclosed. Patient-specific anatomical measurements of the coronary arteries are extracted from medical image data of a patient acquired during rest state. Patient-specific rest state boundary conditions of a model of coronary circulation representing the coronary arteries are calculated based on the patient-specific anatomical measurements and non-invasive clinical measurements of the patient at rest. Patient-specific rest state boundary conditions of the model of coronary circulation representing the coronary arteries are calculated based on the patient-specific anatomical measurements and non-invasive clinical measurements of the patient at rest. Hyperemic blood flow and pressure across at least one stenosis region of the coronary arteries are simulated using the model of coronary circulation and the patient-specific hyperemic boundary conditions.

Abstract: A method is disclosed for actuating an image output device for the output of slice images, obtained from volume data, of a tissue region including at least one hollow organ section. In at least one embodiment, tangential slice planes at observation points along at least one profile line section through the hollow organ section are determined on the basis of provided volume data. In the process, the profile line section is decomposed into shorter profile line sections such that the generated profile line sections are each situated at least approximately in a plane assigned to the respective profile line section as per a predetermined quality criterion. First tangential slice planes are each assigned to the possible observation points on the associated profile line sections on the basis of these planes.

Abstract: A method for operating an imaging diagnostic device is proposed. Raw data is generated by the diagnostic device as a function of modality parameters while utilizing a contrast medium that is used in accordance with an injection protocol. Image data is generated from the raw data by image reconstruction as a function of reconstruction parameters. A quantitative measurement is performed in an image data evaluation by an analysis application. A subsidiary application automatically proposes a set of parameter values which is suited to the analysis application and relates to the injection protocol utilizing stored comparison data.

Abstract: A method is disclosed for post-processing measured values of a tissue region including at least part of a heart, which measured values were registered by way of an imaging system. In at least one embodiment, the method includes at least: generating an at least three-dimensional data record from the measured values; analyzing the at least three-dimensional data record and generating parameter maps in respect of at least two of the following parameters: thickness and/or change in thickness of a myocardial wall, movement of the myocardial wall, local blood-supply values for defined spatial regions of the heart; automatically generating a results parameter map on the basis of the generated parameter maps according to fixed rules; and outputting the results parameter map. Moreover, at least one embodiment of the invention relates to a correspondingly designed device.