Category: F

  • Friction marks

    In the realm of radiography, one encounters artifacts appearing on the x-ray film as a result of static electricity discharge.  

  • Free electron

    Electrons at the outermost shells of atoms. Little or no energy is needed to liberate them.

  • Frame rate

    In the realm of cine or television cameras, there exists a vital parameter referred to as the frame rate. This parameter quantifies the number of sequential pictures displayed per unit of time, typically measured in frames per second (fps).  

  • Focused grid

    In the realm of radiographic imaging, a specialized grid is employed, featuring angled lead strips arranged in a manner that causes them to converge or focus towards a specific point located equidistant from the grid. This particular point coincides with the focusing spot of the x-ray tube.  

  • Focusing cup

    In conjunction with the filament, the focusing cup plays a crucial role in determining the size and shape of the target, also known as the focal spot, within an x-ray tube. This cup, made of molybdenum, is responsible for regulating the electron beam and ensuring precise focusing of the emitted x-rays.  

  • Focus object distance

    In the realm of radiography, there is a significant measurement known as the source-to-object distance (SOD). This measurement refers to the distance between the focal spot of the x-ray tube and the object undergoing radiographic examination.  

  • Fluoroscopy chair

    In the annals of medical history, there existed an antiquated chair constructed from lead. Positioned with its back towards the fluoroscopy screen, this peculiar chair was designed for a purpose that has now become obsolete. During examinations, the operator would straddle the seat, thus facing the patient directly.  

  • Fluoroscopic timer

    In the realm of electrical devices, one can find a manual timer designed for hand-setting purposes. Typically configured for a duration of five minutes, this timer serves the function of automatically discontinuing the flow of current once the specified time period has elapsed.  

  • Fluoroscopic image

    As the radiation traverses through the patient’s body, a diverse range of densities manifests on the fluoroscopic screen.  

  • Fluoroscopic examination

    In the realm of medical imaging, there exists a radiographic technique that employs a fluoroscope. This procedure serves the purpose of scrutinizing and capturing a lasting radiographic image on a film emulsion.