6 results about "Opaque marker" patented technology

A registration fixture for use with a surgical navigation system for registration of medical images with a three-dimensional tracking space includes a base frame adapted to be mounted over a flat panel detector of an x-ray medical imaging device and a side frame having optical tracking markers and mounted to the base frame. The base frame includes a first set of radio-opaque markers embedded therein in a first predetermined pattern and arranged on a plane and a second set of radio-opaque markers embedded therein in a second predetermined pattern and likewise arranged on another plane, the second set of radio-opaque markers being spaced apart from the first set of radio-opaque markers. The side frame has a plurality of optical tracking markers and is configured to be detachably mounted to the base frame without piercing a sterile drape to be interposed between the base frame and the side frame.

The present invention relates to a method of generating a cephalometric image of a patient's head, comprising: acquiring a sequence of projection images by exposing the patient's head with x-rays from an x-ray source while linearly moving an x-ray ceph detector and an x-ray ceph collimator on opposing sides along the patient's head; detecting the real position of the at least one x-ray opaque marker in each of the projection images relative to a target position on the ceph detector; adding the projection images after shifting each projection image relative to its preceding projection image by a predetermined shift amount based on the predetermined rate; wherein the positions of the shifted projection images are individually adjusted by an amount corresponding to a difference in the real position and the target position of the least one marker detected in the corresponding projection image to reduce chatter marks prior to the adding.

The application relates to the technical field of medical devices, and discloses a radiofrequency ablation guide wire system for opening a chronic total occlusion of a blood vessel. The system comprises a radiofrequency guide wire, a monitoring device, a control device, a feedback device and a radiofrequency generator. The radiofrequency guide wire has a movable electrode and a return electrode composed of a plurality of expandable and contractible return sub-electrodes. The monitoring device monitors the current, impedance and temperature of each return sub-electrode in real time. The control device judges the positional relationship of the electrodes and adjusts the radiofrequency output according to the monitoring data. The feedback device provides a position adjustment prompt in the form of sound, light or visual display. The system can further comprise functional components such as a snaring structure, a radio-opaque marker and a hollow inner core. The application improves the precision, safety and operation convenience of chronic total occlusion interventional treatment, reduces the dependence on X-ray contrast, simplifies the surgical procedure, and has a wide clinical application prospect.

The invention relates to a marker body (10) for marking breast tissue for radiotherapy. The marker body (10) has an at least partly tube-like body (12) which is made from a soft elastic material and carries multiple radio-opaque marker elements (18). The at least partly tube-like body (12) is designed so that it offers hardly any resistance to an external, deforming force, but returns to its original shape in the absence of external forces. The at least partly tube-like body (12) has two free longitudinal ends (14, 16) which can be detachably interconnected or are interconnected, resulting in a tubular ring.

A method for geometric calibration of a volume imaging apparatus disposes calibration phantom in a radiation path that includes a subject positioned between an x-ray source and a detector. The phantom has a number of radio-opaque markers formed of a marker material. In a repeated sequence, at each of a number of positional relationships of the x-ray source to the detector: 2D projection image data is acquired for the subject and the phantom, wherein the 2D projection image data distinguishes at least first and second x-ray energy distributions; source-to-detector geometry of the imaging apparatus is calculated, corresponding to the acquired 2D projection image data for the first and second x-ray energy distributions. The method reconstructs and displays a 3D volume image of the subject according to acquired anatomy image data from the subject and source-to-detector geometry within the 2D projection images.

The present invention relates to a method to position a human body part for imaging during operative intervention in an operating room. A radio opaque marker is placed on a skin area near an area of interest. Imaging is performed using imaging ray emitters and images produced therefrom are used to adjust the position of the imaging ray emitters. A Quick Response code is placed in the operating room and a mixed virtual reality headset is used to ascertain the relative position of the area of interest and the operating room. The relative position is used by a computing programming product to compute an optimal position for the human body part. The position of the human body part is adjusted based on the computed result.