Method and device for detecting an analyte in a body fluid
First Claim
1. A method for detecting at least one analyte in at least one sample of a body fluid, wherein at least one test element with at least one test field is used, the at least one test field having at least one test chemistry, wherein the test chemistry is adapted to perform at least one optically detectable detection reaction in the presence of the analyte, wherein the method comprises acquiring an image sequence of images of the test field by using at least one image detector, wherein each image comprises a plurality of pixels, wherein the method further comprises detecting at least one characteristic feature of the test field in the images of the image sequence, wherein the method further comprises correcting a relative position change between the image detector and the test field in the image sequence by using the characteristic feature, thereby obtaining a sequence of corrected images, wherein the sequence of corrected images is adapted for observing a time-dependent change of at least one optically detectable property of the test field due to the detection reaction of the test chemistry with the analyte to be detected;
- wherein the correction of the relative position change comprises using at least one image of the image sequence as a reference image, wherein the reference image is kept unchanged, wherein the remaining images of the image sequence are corrected by using at least one calculational correction of the position of the pixels, wherein the calculational correction is chosen such that a correlation between the reference image and the corrected remaining images of the image sequence is maximized; and
wherein the calculational correction comprises at least one of the following;
a shifting of the pixels of the remaining images of the image sequence in at least one spatial direction, wherein the shifting is chosen such that the correlation between the reference image and the corrected remaining images is maximized;
orat least one rotation of the remaining images of the image sequence about at least one rotational axis by at least one rotation angle, wherein one or both of the rotational axis and the rotation angle are chosen such that the correlation between the reference image and the corrected remaining images is maximized.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for detecting at least one analyte in at least one sample of a body fluid is disclosed. Therein, at least one test element (124) is used, the at least one test element (124) having at least one test field (162) with at least one test chemistry (154) is used, wherein the test chemistry (154) is adapted to perform at least one optically detectable detection reaction in the presence of the analyte. The method comprises acquiring an image sequence of images of the test field (162) by using at least one image detector (178). Each image comprises a plurality of pixels. The method further comprises detecting at least one characteristic feature of the test field (162) in the images of the image sequence. The method further comprises correcting a relative position change between the image detector (178) and the test field (162) in the image sequence by using the characteristic feature, thereby obtaining a sequence of corrected images.
-
Citations
37 Claims
-
1. A method for detecting at least one analyte in at least one sample of a body fluid, wherein at least one test element with at least one test field is used, the at least one test field having at least one test chemistry, wherein the test chemistry is adapted to perform at least one optically detectable detection reaction in the presence of the analyte, wherein the method comprises acquiring an image sequence of images of the test field by using at least one image detector, wherein each image comprises a plurality of pixels, wherein the method further comprises detecting at least one characteristic feature of the test field in the images of the image sequence, wherein the method further comprises correcting a relative position change between the image detector and the test field in the image sequence by using the characteristic feature, thereby obtaining a sequence of corrected images, wherein the sequence of corrected images is adapted for observing a time-dependent change of at least one optically detectable property of the test field due to the detection reaction of the test chemistry with the analyte to be detected;
-
wherein the correction of the relative position change comprises using at least one image of the image sequence as a reference image, wherein the reference image is kept unchanged, wherein the remaining images of the image sequence are corrected by using at least one calculational correction of the position of the pixels, wherein the calculational correction is chosen such that a correlation between the reference image and the corrected remaining images of the image sequence is maximized; and wherein the calculational correction comprises at least one of the following; a shifting of the pixels of the remaining images of the image sequence in at least one spatial direction, wherein the shifting is chosen such that the correlation between the reference image and the corrected remaining images is maximized;
orat least one rotation of the remaining images of the image sequence about at least one rotational axis by at least one rotation angle, wherein one or both of the rotational axis and the rotation angle are chosen such that the correlation between the reference image and the corrected remaining images is maximized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method for detecting at least one analyte in at least one sample of a body fluid, wherein at least one test element with at least one test field is used, the at least one test field having at least one test chemistry, wherein the test chemistry is adapted to perform at least one optically detectable detection reaction in the presence of the analyte, wherein the method comprises acquiring an image sequence of images of the test field by using at least one image detector, wherein each image comprises a plurality of pixels, wherein the method further comprises detecting at least one characteristic feature of the test field in the images of the image sequence, wherein the method further comprises correcting a relative position change between the image detector and the test field in the image sequence by using the characteristic feature, thereby obtaining a sequence of corrected images, wherein the sequence of corrected images is adapted for observing a time-dependent change of at least one optically detectable property of the test field due to the detection reaction of the test chemistry with the analyte to be detected;
wherein the sample of the body fluid is applied to the test field during acquisition of the image sequence, wherein the image sequence comprises a blank image sequence, wherein the blank image sequence comprises a plurality of blank images acquired before applying the sample of the body fluid to the test field, wherein at least one averaged blank image is derived from the blank images of the blank image sequence after performing the correction of the relative position change of the blank images of the blank image sequence. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
26. A method for detecting at least one analyte in at least one sample of a body fluid, wherein at least one test element with at least one test field is used, the at least one test field having at least one test chemistry, wherein the test chemistry is adapted to perform at least one optically detectable detection reaction in the presence of the analyte, wherein the method comprises acquiring an image sequence of images of the test field by using at least one image detector, wherein each image comprises a plurality of pixels, wherein the method further comprises detecting at least one characteristic feature of the test field in the images of the image sequence, wherein the method further comprises correcting a relative position change between the image detector and the test field in the image sequence by using the characteristic feature, thereby obtaining a sequence of corrected images, wherein the sequence of corrected images is adapted for observing a time-dependent change of at least one optically detectable property of the test field due to the detection reaction of the test chemistry with the analyte to be detected;
-
wherein after application of the sample of the body fluid onto the test field at least one region of interest is determined in the image sequence; and wherein at least one corrected image acquired before or during application of the sample of the body fluid onto the test field is compared to at least one corrected image acquired after application of the sample of the body fluid onto the test field on a pixel-by-pixel basis, thereby generating a difference value for each pixel, wherein the difference value denotes a difference of the information contained in corresponding pixels of the corrected images acquired before or during and after application of the sample of the body fluid onto the test field, wherein the pixels are classified as pixels belonging to the region of interest or as pixels not belonging to the region of interest based on the difference values. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
-
Specification