Method and system for providing tomographic pictures of a patient by using contrast medium injections
First Claim
1. A method for a tomographic scan, the method comprising:
- determining, while a patient is injected with a defined test bolus, a temporal concentration profile of a contrast medium in a number of body regions in different scanning planes using a test tomographic scan;
determining functional parameters, of a prediction model that at least approximates the relationship between a profile of a contrast medium injection and the temporal concentration profile of the contrast medium in the body regions, from the determined temporal concentration profile of the contrast medium in relation to a profile of the test bolus injection;
determining a desired contrast for the body regions;
calculating the profile of the contrast medium injection in temporal relationship with the test tomographic scan automatically based on the determined desired contrast, wherein the calculation of the contrast medium injection profile includes defining temporal minimum values for a duration of the desired contrast, the contrast medium injection profile satisfying the temporal minimum values in all of the body regions; and
producing a picture for each of the body regions based on an examination tomographic scan using the calculated contrast medium injection profile,wherein a start of the examination tomographic scan and a start of the contrast medium injection and the profile thereof occurs automatically in a manner temporally tuned to one another based on the automatically calculated profile of the contrast medium injection, andthe contrast medium injected in the examination tomographic scan is first injected into the body regions, after calculating the profile of the contrast medium injection.
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Accused Products
Abstract
A method is disclosed for providing tomographic pictures of a patient with the aid of a tomographic system by using contrast medium injections. The patient is firstly injected with a defined test bolus, while the temporal concentration profile of the contrast medium in at least one body region is determined in at least one scanning plane. The functional parameters of a prediction model that maps or at least approximates the relationship between the profile of a contrast medium injection and the temporal profile of the contrast medium concentration in the body region are determined from the measured profile of the contrast medium concentration in relation to the profile of the test bolus injection. After the specification of a desired contrast in the body region, the profile of a contrast medium injection that is required therefore is automatically calculated in temporal relationship with the scan, and the start of the tomographic scan and the start of the contrast medium injection and the profile thereof are started automatically in a fashion temporally tuned to one another.
24 Citations
26 Claims
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1. A method for a tomographic scan, the method comprising:
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determining, while a patient is injected with a defined test bolus, a temporal concentration profile of a contrast medium in a number of body regions in different scanning planes using a test tomographic scan; determining functional parameters, of a prediction model that at least approximates the relationship between a profile of a contrast medium injection and the temporal concentration profile of the contrast medium in the body regions, from the determined temporal concentration profile of the contrast medium in relation to a profile of the test bolus injection; determining a desired contrast for the body regions; calculating the profile of the contrast medium injection in temporal relationship with the test tomographic scan automatically based on the determined desired contrast, wherein the calculation of the contrast medium injection profile includes defining temporal minimum values for a duration of the desired contrast, the contrast medium injection profile satisfying the temporal minimum values in all of the body regions; and producing a picture for each of the body regions based on an examination tomographic scan using the calculated contrast medium injection profile, wherein a start of the examination tomographic scan and a start of the contrast medium injection and the profile thereof occurs automatically in a manner temporally tuned to one another based on the automatically calculated profile of the contrast medium injection, and the contrast medium injected in the examination tomographic scan is first injected into the body regions, after calculating the profile of the contrast medium injection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification