Stent viewing using a learning based classifier in medical imaging
First Claim
1. A method for stent viewing in medical imaging, the method comprising:
- identifying from a plurality of frames of data a first sub-set of frames of data representing contrast agents, the frames of data representing a patient at different times during inflow of the contrast agent such that the first sub-set the frames of data represent the contrast agent and a second sub-set of the frames of data are free of contrast agent;
detecting markers for a stent in at least some of the frames of data;
selecting a reference contrast frame of data from the first sub-set of the frames of data, the reference contrast frame of data selected as a function of detected markers for the stent;
detecting a vessel wall in the reference contrast frame of data;
aligning the reference contrast frame of data with a stent output; and
outputting an image representing the stent, the image including a highlight of the vessel wall, the highlight aligned with the stent based on the aligning.
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Accused Products
Abstract
Stent viewing is provided in medical imaging. Stent images are provided with minimal or no user input of spatial locations. Images showing contrast agent are distinguished from other images in a sequence. After aligning non-contrast images, the images are compounded to enhance the stent. The contrast agent images are used to identify the vessel. A contrast agent image is aligned with the enhanced stent or other image to determine the relative vessel location. An indication of the vessel wall may be displayed in an image also showing the stent. A preview images may be output. A guide wire may be used to detect the center line for vessel identification. Various detections are performed using a machine-trained classifier or classifiers.
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Citations
19 Claims
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1. A method for stent viewing in medical imaging, the method comprising:
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identifying from a plurality of frames of data a first sub-set of frames of data representing contrast agents, the frames of data representing a patient at different times during inflow of the contrast agent such that the first sub-set the frames of data represent the contrast agent and a second sub-set of the frames of data are free of contrast agent; detecting markers for a stent in at least some of the frames of data; selecting a reference contrast frame of data from the first sub-set of the frames of data, the reference contrast frame of data selected as a function of detected markers for the stent; detecting a vessel wall in the reference contrast frame of data; aligning the reference contrast frame of data with a stent output; and outputting an image representing the stent, the image including a highlight of the vessel wall, the highlight aligned with the stent based on the aligning. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a non-transitory computer readable storage medium having stored therein data representing instructions executable by a programmed processor for stent viewing in medical imaging, the storage medium comprising instructions for:
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identifying images representing contrast agents with a machine-trained classifier from a fluoroscopy imaging sequence; detecting a vessel wall from at least one of the identified images; and generating an image of a stent from the fluoroscopy imaging sequence with the vessel wall enhanced relative to background. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A system for stent viewing in medical imaging, the system comprising:
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a memory operable to store data representing a vessel with contrast agent and a guide wire for a stent; a processor configured to detect the vessel from the data by forming a probabilistic map indicating a likelihood of locations being in the vessel using a machine-trained classifier, determine a center line for the vessel from the guide wire, locate a vessel boundary from the vessel and the centerline, and generate an image from the data, the image highlighting the vessel boundary; and a display operable to display the image. - View Dependent Claims (17, 18, 19)
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Specification