A device and methods for maintaining patient registration in surgical navigation, involving: obtaining a patient position in a tracking system frame of reference, based on a fiducial marker array affixed in a first position relative to the patient; receiving an initial surface scan depicting the patient and the fiducial array; responsive to receiving an intraoperative image depicting the patient: obtaining a position, in the tracking system frame of reference, of the fiducial array affixed in a second position relative to the patient; receiving a secondary surface scan depicting the patient and the fiducial array; detecting a deviation in a position of the fiducial marker array relative to the patient between the initial and secondary surface scans; and applying the deviation to the position of the patient to generate an updated position of the patient in the tracking system frame of reference, based on the fiducial array affixed in the second position.

A system and method is presented for cuff-less blood pressure measurement in a mobile device. A key aspect of this disclosure is the discovery of a new location for blood pressure measurement at the fingertip of a subject and that reflectance-mode photoplethysmography can be used to help make this measurement. Through experiments in human subjects, it was discovered that it is indeed possible to measure systemic blood pressure by having a subject press the fingertip against a reflectance-mode photo-plethysmography-force sensor unit under visual guidance and then compute blood pressure from the resulting variable-amplitude blood volume oscillations and applied pressure via an oscillometric algorithm.

A system and method for rehabilitating a patient. In some embodiments, a patient or other subject can stand on a balance plate and perform one or more tests in response to instructions or visual stimuli on a display screen. Data, such as Centre of Pressure data, can be obtained from the balance plate and processed by a processor in tandem with the progression of a test presented on the display screen. The information can be correlated and used to assist in diagnosing or rehabilitating the patient or subject.

Systems and methods use a three-dimensional snapshot of an infant, child, adolescent, or adult where the subject may have bent legs and an unaligned head position, to provide an estimate of human length. The system identifies anatomical features from the digital information and generates a virtual skeleton. The cumulative distances between pseudo-joints of the virtual skeleton provide an estimate of human length. Comparing length estimates from multiple three-dimensional snapshots of the same individual acquired over time provide an indication of growth of the infant, child, or adolescent. Daily estimates of length can detect growth faltering sooner than less frequent estimates of length, which can lead to timely intervention.

A radiotherapy system is provided. The radiotherapy system may include a treatment component, an imaging component, and a table being movable between the treatment component and the imaging component along a first direction in a first coordinate system. The table may have a plurality of cross sections perpendicular to the first direction. The table may include a positioning line that extends along the first direction and have a positioning feature. The positioning feature may have a plurality of feature values. Each feature value may correspond to one of the plurality of cross sections.

A stent is placed inside an aorta of a subject, the stent comprising one or more electrodes, control circuitry, and a first antenna coupled thereto. A second antenna circumscribes a neck of the subject, such that that at least one turn of wire of the second antenna extends from a first position that is anatomically superior to a left clavicle of the subject to a second position that is anatomically inferior to a jugular notch of the subject and from the second position to a third position that is anatomically superior to a right clavicle of the subject. The second antenna transmits an electrical signal to the first antenna via inductive coupling, and is shaped to have an L-shaped projection in a sagittal plane, with an angle between two legs of the L-shaped projection being 80-160 degrees when placed upon a flat surface. Other applications are also described.

A method of maintaining patient registration in surgical navigation includes: obtaining a patient position in a tracking system frame of reference, based on a fiducial marker array affixed in a first position relative to the patient; receiving an initial surface scan depicting the patient and the fiducial array; responsive to receiving an intraoperative image depicting the patient: obtaining a position, in the tracking system frame of reference, of the fiducial array affixed in a second position relative to the patient; receiving a secondary surface scan depicting the patient and the fiducial array; detecting a deviation in a position of the fiducial marker array relative to the patient between the initial and secondary surface scans; and applying the deviation to the position of the patient to generate an updated position of the patient in the tracking system frame of reference, based on the fiducial array affixed in the second position.

An examination apparatus for medical examination, in particular determination of a blood pressure, of an animal, in particular an animal having a paw, particularly preferably an animal from the subfamily of the Felinae. The examination apparatus has a sensor device for the optical examination of an arterial blood flow of the animal, in particular for performing a photoplethysmography. For this purpose, the sensor device has at least one emitter for the emission of electromagnetic radiation and at least one detector for the detection of the radiation emitted by the emitter. The sensor device preferably has several emitters and several detectors that are arranged in a periodic structure. Alternatively or additionally, the sensor device has a limiting device which defines a border of a detection region of the sensor device so that a distance of the border from the sensor device is more than 0.5 mm and/or less than 5 mm.

A medical image diagnosis apparatus according to an embodiment includes a gantry and a processor. The gantry includes an imaging system configured to perform an imaging process on a subject by using one of radiation and magnetism. The processor is configured to generate a second image by combining a first image acquired by imaging the subject while using an optical imaging device different from the imaging system, with a plane related to an imaging position in the imaging process using the imaging system.

A method for detecting body movements of a sleeping person includes continuously creating three-dimensional images using an imaging unit and providing distance measurement values pixel by pixel. A two or three-dimensional height profile has points on a surface, or on, or next to the person. The profile is stored and available for each time. A range indicating a body part or area depending on a reference point or range is selected as a first region of interest. Periods of changes of the profile of the first region exceeding a first threshold value, and intervals therebetween are determined. Noise values of the profile are determined pixel by pixel for the intervals. Further changes of the profile exceeding a second threshold value in the intervals are determined, considering the noise value pixel by pixel. The periods and further periods of changes of the profile are registered as body movements.