Elscint Ltd.

Other

Terraop Ltd.

Bright Imaging Ltd.

Daniel I Barnea

Dan Inbar

Abraham Bruck

Noam Sorek

Yuval Zur

Moshe Medina

Saul Stokar

Slava Krylov

David Schreiber

Amir Ban

Noam Kaplan

Eliezer Ben-Gad

Avner Spector

Sylvia Rutiser

The present invention is an electronic imaging device and method of expanding its dynamic range. The invention comprises modifying the imaging device by providing a comparator and reset trigger circuit located at or near the site of each of the pixels. The comparator triggers a reset mechanism when the voltage in the charged pixel reaches a reference voltage. During the global exposure time each individual pixel can be self-reset several times, depending on the intensity of the radiation incident upon it. At the end of the global exposure time, each pixel contains only the 'residual value' of voltage that remains from the last individual self-reset to the end of the global integration time. An algorithm is implemented, which estimates and determines the number of resets undergone by each pixel during the global exposure time. From this number of resets the algorithm is able to reconstruct the true image. As opposed to prior art methods that make use of pixel reset the device of the invention does not contain electronic components for counting and remembering the number of times that each of the pixels was reset.

Method and apparatus for imaging of scenes having large intensity variance

A MEMS apparatus for scanning an optical beam comprises a mirror operative to perform a rotational motion to a maximum rotation angle around a mirror rotation axis, and a bouncing mechanism operative to provide a bouncing event and to reverse the rotational motion. The bouncing event provides the mirror with a piecewise linear response to actuation by intrinsically nonlinear electrostatic forces. The bouncing mechanism includes an element chosen to impart an overall nonlinear stiffness to the system and is selected from the group of elements consisting of a bouncer and a pre-curved nonlinear stiffness element.

Bouncing mode operated scanning micro-mirror

An improved three dimensional display device, for a single viewer. To the apparatus of U.S. Pat. No. 5,132,839 is added a mechanism for tracking the eye motion of the viewer. Because the control system 'knows' the angles at which the device must project the frame images, only two (stereoscopic) frame images need to be projected in each frame, and a more complete illusion of three dimensionality, with respect to both lateral and vertical movement of the viewer, is provided.

Three dimensional display device

An ophthalmic lens that includes a construction that provides a static grading or some other means that yields a nonuniform power function which depends on the surface of the lens. The lens also includes a selectively operable element that effects a dynamic change in the power of the lens which is a uniform or nonuniform function of the location point on the lens. The actual power of any point on the lens is then the super position of the power due to static grating and the power due to the selectively operable element. The proper design of each power function facilitates ophthalmic lenses that are suitable and optimized for special applications as well as for general purpose usage.

Opthalmic lens

A shock wave lithotripter includes a shock wave generator for producing shock waves that are focused at a focus point remote from the shock wave generator during operation of the lithotripter, and an ultrasound probe having a transducer for producing ultrasound beams defining a plane of radiation during a calibration mode of operation of the lithotripter. Associated with the ultrasound probe is a screen for showing a display of the region illuminated by the beams. During calibration, the free end of a focal point target is positioned at the focus point of the lithotripter. The probe is moved in a direction perpendicular to the plane of the radiation beams produced by the probe until the free end of the target is illuminated by the ultrasound radiation. The location on the screen of the free end of the target is marked to indicate the location of the focus point of the shock wave generator in the display. The target is removed, and the lithotripter is then positioned relative to a patient such that a stone in the body of the patient, as displayed on the screen associated with the ultrasound scan, coincides with the mark on the screen representing the focus point of the lithotripter. Shock waves produced by the shock wave generator are thus focused on the stone which is fragmented by shock waves when the generator is activated.

Shock wave lithotripter and method for using the same

A calculi locator is provided having at least one ultrasound transducers in combination with a shock wave generator. The ultrasound transducer is rotatable about the longitudinal axis of a reflector of the shock wave generator. The shock wave generator includes a target focal point. The transducer is used to assure positional coincidence of the true location of the calculi and of the target focal point. Alternatively, either a mathematical correction unit is used or iterative measurements are used to correct for refraction errors in the location of the imaged calculi.

Lithotripsy system using ultrasound to locate calculi

A calculi locator is provided using an ultrasound transducer in combination with shock wave generator. Various means are provided for assuring coincidence of ultrasound obtained images of the calculi, the actual location of the calculi and of the target focal point of the shock wave generator means.

Lithotripsy system having an ultrasonic calculi locator

A variable power lens includes a pair of optical membranes, each of which has a periphery and at least one of which is flexible. A frame is provided for holding the membranes with their peripheries in juxtaposition such that the surface of the membranes and their peripheries define a predetermined volume which is filled with refractive fluid. A control operatively associated with the frame selectively imposes forces on the periphery of the membranes which vary the fluid pressure in the volume. The membrane and the frame are constructed and arranged so that the surfaces of the membranes vary in a substantially spherical manner in response to changes in pressure of the fluid.

Variable power lens and method

Improved T2 values and signal to noise ratio obtained by magnetic resonance image synthesization. Each measured echo signal intensity is divided by a correcting factor that is a function of the echo number to obtain corrected echo signal intensity. A characteristic curve is best fitted to the corrected intensity values and the intensity values of the curve are used.

Noise reduction in magnetic resonance images

A digital radiographic method and apparatus are described for the visualization of a portion of the circulatory system of a subject by feeding a catheter through a blood vessel while its progress is observed by exposing the respective portion of the subject's body to penetrating radiation, e.g., X-rays. In the described method and apparatus, all the prior positions of the catheter are stored so that all such prior positions visited by the catheter are displayed with each display of its current position. In addition, during the feeding of the catheter through the blood vessel, a substance relatively opaque to the radiation is injected into the blood vessel, whereby the digitized images of the previous catheter visits which are stored and displayed also include the image of the blood vessel and its junctures as revealed by the injected substance.

Radiographic method and apparatus for the visualization of the interior

An image-reconstructive technique for examining a body by means of penetrating radiation, such as X-rays, is described in which a pre-body collimator having a two-dimensional array of radiation-transmitting holes each bordered by radiation non-transmitting walls is disposed between the body and the source of radiation, and a plurality of exposures are made onto a radiation-sensitive surface, in which the radiation is projected through the collimator while the radiation source is at a plurality of different locations, such that during the successive exposures, the radiation from the source passes through different ray paths defined by the holes in the pre-body collimator. The radiation level received by each of the radiation-sensitive surface elements is detected, stored, and processed to reconstruct the two-dimensional radiation pattern but with enhanced resolution. Preferably a post-body collimator is also used to suppress scattering. Described are a four-exposure procedure and a nine-exposure procedure.

Growing community of inventors

Tel Aviv, Israel

Daniel I Barnea