Fluorocospy - Radiography Machine

Monday, July 23, 2018


While routine radiography procedures still or static images, fluoroscopy permits the viewing of dynamic images or xray images in motion. Fluoroscopy is usually performed by radiologists who are assisted by radiographers. Fluoroscopic procedure are a routine aspect of every radiographer’s clinical education.

Fluoroscopic Equipment

A fluoroscope is an xray machine designed for direct viewing of the xray image. Early fluoroscopes consisted simply of an xray tube mounted under the xray table and a fluorescent screen mounted over the patient. The physician watched the xray image on the screen while turning the patient into the desired positions to view various anatomic areas. The fluoroscopic image was very dim, dark adaptation was required, and the procedure was carried out in a dark room.

Today’s equipment is far more sophisticated. Most fluoroscopic units are properly called radiographic / fluoroscopic (R/F) units because they can be used for both radiography and fluoroscopy. This is convenient because most fluoroscopic examination also have a radiographic component.

Spot Films

Spot Films are taken during fluoroscopy to record the image as seen on the fluoroscope. Depending on the age of equipment, cassettes, roll film, or digital systems may be used to record fluoroscopic images.

Fluoroscopic Tube

The fluoroscopic tube is used to expose spot films and images areas of interest. After the fluoroscopic portion of the study is completed, additional images may be taken using an overhead tube for comprehensive visualization of the entire anatomic region.

Digital Fluoroscopy

The radiation required for a fluoroscopic study has been greatly reduced by the use of the image intensifier. This electronic device is in the form of a tower that fits over the fluoroscopic screen. Inside is a series of photomultiplier tube that brighten and enhance the image formerly seen by looking directly at the fluoroscopic screen.

The enhanced image is digitized or photographed by a video monitor. A Computer or videotape recorder can be used to make a record of the entire study.
Some towers can be removed from the fluoroscope and moved away from the table when they are not needed. The fluoroscope and spot film device can also be moved out of the way when the table is used for radiography.

The control console of an R/F unit is more complex than that of a basic radiography unit. There may be separate mA and kVp settings for the control of the radiographic (overhead) and fluoroscopic (under table) tubes, and special settings for spot film radiography. A timer on the control advances when the fluoroscope is on, and an alarm sounds after a preset period, usually 5 minutes.

Radiographer’s Duty in Fluoroscopy Examinations

For a fluoroscopy examination, the duties of the radiographer include the following:
  • Taking the patient’s history, including information on the success of dietary and/or bowel cleansing preparation
  • Getting the patient gowned
  • Explaining the procedure to the patient
  • Taking and processing any required preliminary images
  • Setting the control panel correctly for fluoroscopy and spot film radiography
  • Positioning the patient for the start of the procedure
  • Preparing the equipment for fluoroscopy
  • Entering patient data into the computer for digital imaging, if applicable
  • Loading the spot film device, if applicable
  • Preparing contrast agents as needed
  • Assisting the radiologist as needed. This may involve helping the patient assume various positions; assisting the patient and / or the radiologist with the contrast medium; changing spot film cassettes as needed; loading, unloading, and identifying roll films; or electronically managing digital images
  • Taking follow up radiographs
  • Providing post procedural care and instructions.

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