摘要:
The present application relates to microstrip-fed printed planar antennas and in particular to the geometry of same. More particularly an antenna is provided with a radiating or ground plane element having a generally continuous curved shape and being symmetrical about the longitudinal axis and non-symmetrical about an axis transverse to the longitudinal axis.
摘要:
The present application relates to microstrip-fed printed planar antennas and in particular to the geometry of same. More particularly an antenna is provided with a radiating or ground plane element having a generally continuous curved shape and being symmetrical about the longitudinal axis and non-symmetrical about an axis transverse to the longitudinal axis.
摘要:
A computer-implemented method, a device, a system and a computer program are disclosed for three-dimensional displaying of medical body structures within the framework of a medical procedure, in particular cardiac surgery, wherein movement information is derived from a dynamic image of a body structure to be examined. In at least one embodiment, movement information is derived from vector analysis. After acquiring a static image of the respective body structure, vector analysis is applied to the static image to derive a modified static image with movement information of the body structure. The static image can then be displayed after it has moved.
摘要:
A method and system for adaptive discriminant learning and measurement fusion for image based catheter tracking is disclosed. An adaptive discriminant model is trained online based on a tracked object, such as a pigtail catheter tip, in at least one previous frame of a fluoroscopic image sequence. The object is tracked in the current frame of the fluoroscopic image sequence based at least on the adaptive discriminant model trained online. The object may be tracked in the current frame based on a fusion of three types of measurement models including the adaptive discriminant model trained online, an object detection model trained offline, and an online appearance model.
摘要:
A method and system for registering ultrasound images and physiological models to x-ray fluoroscopy images is disclosed. A fluoroscopic image and an ultrasound image, such as a Transesophageal Echocardiography (TEE) image, are received. A 2D location of an ultrasound probe is detected in the fluoroscopic image. A 3D pose of the ultrasound probe is estimated based on the detected 2D location of the ultrasound probe in the fluoroscopic image. The ultrasound image is mapped to a 3D coordinate system of a fluoroscopic image acquisition device used to acquire the fluoroscopic image based on the estimated 3D pose of the ultrasound probe. The ultrasound image can then be projected into the fluoroscopic image using a projection matrix associated with the fluoroscopic image. A patient specific physiological model can be detected in the ultrasound image and projected into the fluoroscopic image.
摘要:
The present invention relates to a double-stranded ribonucleic acid (dsRNA) for inhibiting the expression of a mutant gene, comprising a first strand that has a complementary region that is complementary to at least a portion of an RNA transcript of at least part of the mutant target gene and a second strand of the dsRNA complementary or substantially complementary to the first strand. The invention further relates to a pharmaceutical composition comprising the dsRNA and a pharmaceutically acceptable carrier. The pharmaceutical compositions are useful for inhibiting the expression of a target mutant gene, as well as for treating diseases caused by expression of the target gene. The invention also relates to methods for inhibiting the expression of a target mutant gene, as well as methods for treating diseases caused by the expression of the target gene.
摘要:
A method and system for autoregressive model based pigtail catheter motion prediction in a fluoroscopic image sequence is disclosed. Parameters of an autoregressive model are estimated based on observed pigtail catheter tip positions in a plurality of previous frames of a fluoroscopic image sequence. A pigtail catheter tip position in a current frame of the fluoroscopic image sequence is predicted using the fitted autoregressive model. The predicted pigtail catheter tip position can be used to constrain pigtail catheter tip detection in the current frame. The predicted pigtail catheter tip position may also be used to predict abnormal motion in the fluoroscopic image sequence.
摘要:
The invention relates to a method for reconstructing a three-dimensional target volume, particularly within the human body, in realtime and displaying it, with a three-dimensional reconstruction volume being determined from a basic set comprising a minimum number of two-dimensional images obtained from an image recording device located within the target volume, wherein, when a new image is included in the basic set, locally limited updating at least of the reconstruction volume's partial areas covered by the new image will under a predefined condition be performed and the updated reconstruction volume will be displayed.
摘要:
A method as a workflow for imaging for a heart valve implant procedure includes positioning the patient and an articulated imaging apparatus relative to one another, inducing rapid ventricular pacing in the patient, and imaging a region of the patient's heart to obtain image date for a three-dimensional image. The three-dimensional data is used to construct a three-dimensional image of the region of the patient's heart an the three-dimensional image is displayed for use in the implanting of the replacement heart valve. Optional steps may include obtaining a real time two-dimensional image of the patient's heart and superimposing the real time two-dimensional image with the constructed three dimensional image. The replacement valve is moved into position in the patient's heart during rapid ventricular pacing and breath hold using the superimposed two-dimensional and three-dimensional image information.
摘要:
A method for registration of ultrasound device in three dimensions to a C-arm scan, the method including acquiring a baseline volume, acquiring images in which the ultrasound device is disposed, locating the device within the images, registering the location of the device to the baseline volume, acquiring an ultrasound volume from the ultrasound device, registering the ultrasound volume to the baseline volume, and performing fusion imaging to display a view of the ultrasound device in the baseline volume.