39 results about "Contrast injection" patented technology

A method of and system for performing intravenous tomographic digital angiography imaging which combines the principles of intravenous digital angiography with those of cone-beam volume tomography for generating a direct, unambiguous and accurate 3-D reconstruction of stenosis and other irregularities and malformations from 2-D cone-beam tomography projections is disclosed in which several different data acquisition geometries, such as a circle-plus-arc data acquisition geometry, may be utilized to provide a complete set of data so that an exact 3-D reconstruction is obtained. Only a single IV contrast injection with a short breathhold by the patient is needed for use with a volume CT scanner which uses a cone-beam x-ray source and a 2-D detector for fast volume scanning in order to provide true 3-D descriptions of vascular anatomy with more than 0.5 lp/mm isotropic resolution in the x, y and z directions is utilized in which one set of cone-beam projections is acquired while rotating the x-ray tube and detector on the CT gantry and then another set of projections is acquired while tilting the gantry by a small angle. The projection data is preweighted and the partial derivatives of the preweighted projection data are calculated. Those calculated partial derivatives are rebinned to the first derivative of the Radon transform, for both the circular orbit data and the arc orbit data. The second partial derivative of the Radon transform is then calculated and then the reconstructed 3-D images are obtained by backprojecting using the inverse Radon transform.

A system for delivering a contrast medium to a treatment site including a delivery device, and a portable power injector. The delivery device includes a guidewire lumen and a contrast injection lumen, the guidewire lumen and contrast injection lumen being at least partially coaxial. The portable power injector includes an injector body and is configured to contain a contrast medium. The injector body has a plunger disposed therein. The portable power injector also includes a pressure generator, the pressure generator being configured to apply a pressure to the plunger to drive the contrast medium from the injector body and through a distal end of the contrast injection lumen.

The invention relates to an automatic contrast injection device. According to the automatic contrast injection device, a medical tee joint is connected with a first injector, a second injector and aninfusion needle tubing and adjusts the route manners of the first injector, the second injector and the infusion needle tubing; a control device controls a first linear guide rail slider and a secondlinear guide rail slider to drive the first injector and a second injector to mutually push in air and normal saline, thereby forming and injecting size-uniform contrast bubbles stably into human bodyto achieve automation; further, a tee joint driving mechanism drives the valve body of the medical tee joint to rotate to further enhance automation; further, the automatic cooking robot is applicable to injectors of various specifications to meet the requirements on one load for multiple injection; further, the automatic cooking robot also comprises a blocking detection module, which can achieveself-locking during obstruction or displacement of the infusion needle tubing. On balance, the automatic cooking robot has the advantage of combining contrast agent and air into size-uniform and stable contrast agent bubbles and injecting the bubbles into human body, thereby achieving ultrasound contrast standardization and operation stability.

A syringe for injecting contrast injection media into a patient. An inlet valve system associated with the syringe, the inlet valve system operable with a contrast injection media having any viscosity within the range of about 1 cP to about 30 cP. An inlet valve system associated with the syringe, the inlet valve system including a valve member having a density of less than or equal to 1 gram per cubic centimeter. A contrast injector system with such a syringe.

An apparatus (130) and a method for adjusting, in perfusion imaging system, a periodic contrast agent injection rate signal (IS) for an injector (135) as function of an image sampling rate determined by the rotational speed of an X-ray source (107)-detector (109) assembly of an X-ray imager (100). Frequency, periodicity and pulse width of the contrast agent injection rate signal (IS) is adjusted to mitigate temporal signal aliasing in a sample of a time attenuation contrast (TAC) signal.

An automated fluid control system for controlling fluid flow between a catheter, a saline supply, a contrast supply and an injector is disclosed. Pinch valves are provided in the saline input and output lines and contrast input and output lines. A controller is linked to the pinch valves to sequentially open and close the pinch valves during functions which include contrast injection and saline injection.

The invention discloses a clinical application method of an ultrasound contrast injection system, and specifically relates to the field of medical equipment. The system includes two sets of side plates, a connecting plate and fixed plates, the connecting plate is fixedly arranged between the two sets of the side plates, the fixed plates are arranged on the side surfaces of the connecting plate, and the fixed plates are fixedly connected with the connecting plate; and a backing plate is fixedly arranged at the lower surfaces of the side plates, and driving motors are arranged on one end of theside plates. Through the overall design, a first syringe and a second syringe are driven by the driving motors to drive screw rods to complete injection of medical solutions, the manual injection linkis reduced, the operation process is more convenient, the speed is constant and stable in the injection process, the speed can be adjustable, the injection process is more stable, reliable and comfortable, the syringe is switched at any time, two different medical solutions are replaced for injection, the system is convenient and efficient, and compared with a current single injection device which has complicated and cumbersome operation of changing a medical solution, the system provided by the invention is more superior and has higher practicality.

A catheter device for providing visualization as well as support and/or stability for blood vessels during procedures for inserting electrical leads. The catheter device comprises a longitudinal member having a distal end and a proximal end, an expandable element near the distal end of the longitudinal member for providing support to the blood vessel, and a contrast release port near the distal end of the longitudinal member for releasing a contrast medium into the blood vessel to visualize the blood vessel.

The expandable element may comprise an inflatable balloon, or a plurality of compressible elements that expand to a balloon like shape, or a compressible coil housed in a protective sheath that retracts to allow the coil to expand. The catheter device comprises two inflatable balloons. At its proximal end, the catheter device comprises one or more inflation ports for inflating the one or more balloons.

To allow for visualization using a contrast agent, the catheter device further comprises a contrast injection port near its proximal end, and a contrast release port near its distal end.

The invention discloses a clinical radiography injection device and method for the cardiovascular medicine department and particularly relates to the technical field of medical instruments, the clinical radiography injection device comprises a first connecting cylinder and a second connecting cylinder, a needle seat is arranged on the front face of the second connecting cylinder, and a pillow is arranged on the front face of the needle seat; the inner wall of the first connecting cylinder is in lap joint with the outer surface of the piston push plate. By arranging a threaded piston rod, a control plate, a first gear, a second gear, a lead screw, a filter plate and a heating stirring rod, a threaded cylinder drives the lead screw and the filter plate to move forwards, and after the filter plate makes contact with a needle base, a piston push plate directly extrudes a contrast agent to penetrate through the filter plate to enter a human body; the filter plate can filter rubber particles possibly existing in the contrast agent, the situation that the rubber particles enter the human body is avoided, meanwhile, the heating stirring rod stirs, disperses and heats the contrast agent before injection of the contrast agent, smooth injection of the contrast agent is guaranteed, and meanwhile the comfort of the contrast agent entering the human body during injection is guaranteed.

The invention discloses a clinical contrast injection device for cardiovascular medicine and an injection method, and relates to the technical field of injectors, the clinical contrast injection device comprises a syringe, an injection needle and a first piston plate, the lower surface of the first piston plate is fixedly connected with a piston rod, the lower surface of the syringe is provided with a first opening allowing the piston rod to penetrate through and be in sliding connection with the piston rod, the inner wall of the syringe is fixedly connected with a heat-conducting pipe, the space between the heat-conducting pipe and the syringe is filled with heat-conducting liquid, the clinical contrast injection device also comprises a heating component used for driving the heat-conduction liquid to circularly flow and rise the temperature and a switching component enabling the piston plate to move while rotating or only moving when the piston rod moves, and the heating component is in transmission connection with the switching component. The clinical contrast injection device has the effects that a contrast agent can be conveniently stirred to be sparse, meanwhile, in the stirring process, the contrast agent can be synchronously heated, and the comfort degree of a patient is improved.