Search results
Results from the WOW.Com Content Network
G-arm medical imaging systems are based on fluoroscopic X-ray and are used for a variety of diagnostic imaging and minimally invasive surgical procedures. The name is derived from the G-shaped arm used to connect two X-ray generators and two X-ray detectors, image intensifiers or digital flat panel detectors , to one another.
In this case, a system of filters, lenses and cameras is attached to the end of the probe. [10] Unlike open surgery, the background from external light sources is reduced. Nevertheless, the excitation power density at the sample is limited by the low light transmission of the fiber optics in endoscopes and laparoscopes, particularly in the near ...
From the late 1980s onward, digital imaging technology was reintroduced to fluoroscopy after development of improved detector systems. Modern improvements in screen phosphors , digital image processing , image analysis , and flat panel detectors have allowed for increased image quality while minimizing the radiation dose to the patient.
Digital subtraction angiography (DSA) is a fluoroscopy technique used in interventional radiology to clearly visualize blood vessels in a bony or dense soft tissue environment. Images are produced using contrast medium by subtracting a "pre-contrast image" or mask from subsequent images, once the contrast medium has been introduced into a ...
A PTC is an outpatient procedure lasting anywhere from 15 minutes to an hour where an interventional radiologist accesses the patient's bile duct system with a needle through the skin and liver under imaging guidance. Using fluoroscopy (essentially an X-ray camera) to guide a wire (followed by a catheter over the wire) through the bile duct ...
Diffuse optical imaging (DOI) is a method of imaging using near-infrared spectroscopy (NIRS) [4] or fluorescence-based methods. [5] When used to create 3D volumetric models of the imaged material DOI is referred to as diffuse optical tomography , whereas 2D imaging methods are classified as diffuse optical topography .
Radiography is an imaging technique using X-rays, gamma rays, or similar ionizing radiation and non-ionizing radiation to view the internal form of an object.Applications of radiography include medical ("diagnostic" radiography and "therapeutic radiography") and industrial radiography.
The filling of the small intestines can be viewed continuously using fluoroscopy, or viewed as standard radiographs taken at frequent intervals. The technique is a double-contrast procedure that allows detailed imaging of the entire small intestine. However, the procedure may take 6 hours or longer to complete and is quite uncomfortable to undergo.