FLUOROSCOPY - TRIGGER 13 - FACI GUIDE - INTRO PDF

INTRODUCTION TO RADIOLOGIC TECHNOLOGY WITH HEALTHCARE FACILITATOR’S GUIDE TRIGGER 13 FLUOROSCOPY FLUOROSCOPY ⚫ Provide real-time dynamic viewing of anatomic structures....

INTRODUCTION TO RADIOLOGIC TECHNOLOGY WITH HEALTHCARE FACILITATOR’S GUIDE TRIGGER 13 FLUOROSCOPY FLUOROSCOPY ⚫ Provide real-time dynamic viewing of anatomic structures. ⚫ Dynamic studies are examinations that show the motion of circulation or the motion of internal structures. ⚫ Uses contrast media to highlight the anatomy. ⚫ Continuous image of the internal structure while the x-ray tube is energized. ⚫ Fluoroscopy is actually a rather routine type of x-ray examination except for its application in the visualization of vessels, called angiography. Main parts of a fluoroscope ⚫ Imaging Chain Components 1. X-ray image intensifier (II) – converts incident x-ray photons to light photons of sufficient intensity to provide a viewable image. The four major components are: (1) an input screen that absorbs incident x-rays and converts the image to an electron pattern, (2) the electron optics, which accelerates the electrons and minifies the electron image, (3) an output screen, which converts the accelerated electrons into visible light image, and a (4) housing, that maintains a vacuum, contains the other components, and provides an unimpeded path for electrons that carry the image.  2. Flat-panel detectors – replaces the image intensifier (II) by directly converting the x-ray images into a digital form. Fluoroscopic X-ray Source Assembly 1. X-ray tube – similar from all general construction but are commonly used in a more continuous manner. 2. Collimator – are designed to dynamically adjust the overall x-ray field size in response to a combination of inputs from both the operator and the system. 3. Filter – accomplishes spectral shaping which simultaneously restricts the x-ray tubes operating kV. TUBE UNDER RADIOGRAPHIC TABLE TUBE ABOVE THE RADIOGRAPHIC TABLE