Fundamentals of Fluoroscopic Imaging Questions and Answers, Graded A+

Fundamentals of Fluoroscopic Imaging Questions and Answers, Graded A+ Which of the following describes how fluoroscopic images are acquired that study human anatomy and function? Real-time acquisition Which three of the following are necessary to generate fluoroscopy X-radiation IR Conversion of x-ray to visible light Which of the following needs to be in effect to intercept the fluoroscopic primary beam Primary barrier, such as the IR is required When performing fluoroscopic procedures the x-ray beam must do which of the following aligned with the center of the IR Mobile fluoroscopic systems are often referred to as Portable C-arm system Which of the following features are typically included in fluoroscopic room system All Which of the following types of controls will allow radiation exposure to the patient Dead man's switch foot pedal Which of the following is a key component in the fluoroscopic imaging chain Image intensifier assembly Which of the following best describes image intensifiers at a basic, technological level energy conversion tubes Which of the following will improve an image intensifiers efficiency Contain a perfect vacuum as part of it's tube design X-ray that emanate from the patient are initially detached by what component of the intensifier tube during fluoroscopy Input phosphor The product of the minification gain and the flux gain is calculated to determine the brightness gain Which technology collects light from the output phosphor to create a television image for viewing Solid state CCD Which of the following statements is accurate regarding image intensifiers The photocathode layer of an image intensifier is responsible for the liberation of electrons, which are then accelerated toward an anode disc The voltage difference between the photocathode and anode assembly in an image intensifier is volts Which of the following is the first order of events when operating an image intensifier X-rays striking the input phosphor Which two of the following events need to occur before light emission from electron excitation Light emissions from the phosphor Electrons emitted upon light stimulation Through the photoelectric effect, electrons are accelerated from the cathode side to the anode side of the image intensifier tube through a volt potential difference Which of the following is emitted at the output phosphor visible light Which of the following definitions accurately describes the term "gain" amplification of electrical signal The photocathode in an image intensifier converts visible light into electrons The ability of an image intensifier to increase fluoroscopic image illumination is referred to as brightness gain To maintain the same brightness gain, a decrease in flux gain would require an increase in minifcation gain Image intensifier input phosphor and photocathode surfaces are Concave in shape When three incident photons strike the input phosphor and produce 4500 light photons from the output phosphor the flux gain 1500 An image intensifier has an input phosphor diameter of 14 inches and an output phosphor diameter of 1 inch. its minification gain is 196 Which of the following is accurate about television viewing television viewing is a fluoroscopic standard of care Which two of the following accurately describes current fluoroscopy monitors Television monitors used in fluoroscopy view in black and white Fluoroscopic viewing monitors are suspended from the ceiling or on mobile carts The television camera pick up tube commonly used with video fluoroscopy is Vidicon or plumbicon tube In the fluoroscopic imaging chain of components, which of the following components affect image quality television viewing monitor CCD video imaging used what type of technology Solid state computer chip Which of the following is accurate regarding flat panel digital fluoroscopy a television is required for viewing While fluroscopy is a dynamic imaging process, spot filming is a static imaging process of individual images Fluoroscopic spot film images are controlled by AEC termination Which of the following is a key advantage of spot film radiography improved spatial resolution How do modern fluoroscopic system record images digital capture technologies and processing Which of the following is necessary in order to capture a digital photospot image Video fluoroscopy must be halted momentarily Which of the following describes why digital photospots are preferred by clinicians image quality features and dosages With digital photospots using a flat panel DR detector the Anatomical coverage is a large as 14 x 17 Which of the following advantages do photospot images present that fluoroscopic images do not photospot images reveal better spatial and contrast resolution Which of the following is accurate regarging dual field image intensifiers Dual field image intensifiers have a single input dimension that can be used for two imaging fields Which of the following are true regarding multi field image intensifiers They use a single input phosphor In order to shift the electron stream focal point to the correct position in a multi field image intensifier the Stronger negative charge is placed on electrostatic focusing plates Which of the following occurs when a multi field image intensifier is used in the Mag mode Electron focal point shifts closer to the photocathode The MF for a 12/9/6 image intensifier used in the six inch mode would be 2.0 How would decreasing the fluoroscopic field size affect the multi field image intensifier Spatial resolution increases What is considered to be the largest size of input diameter for an image intensifier 16 inches The increase in dose for a multi field image intensifier ( 40/30/23 )used in the Mag 1 mode would be 1.78 When utilizing a multi field image intensifier in the Mag 2 mode what should you expect to happen when switching to the Mag 1 mode Decreased spatial resolution Conventional fluoroscopic mA used what type of mA doses for continuous fluoroscopy Low range from 0.5-5.0 mA Digital fluoroscopic system use A pulsed intermittent x-ray exposure sequence The practice of stopping and starting fluoroscopy using a manual control of exposures is commonly referred to as Intermittent fluoroscopy In pulsed fluoroscopy, the fluoroscopic mA value is expressed as the pulse height If the fluoroscopic image is smearing or lagging in its visucal display when performing a procedure using pulsed fluoroscopy, corrective action would include which of the following increasing the pulse rate Which of the following is the measurement used for time in pulsed fluoroscopy milliseconds What two effects will occur if longer widths of pulsed fluoroscopy are used Increased patient exposure increase tube heat Which three of the following are required if a study required panning or sweeping Shorter pulse widths Faster frame rates shorter pulse intervals Digital flat panel detectors used for fluoroscopy are indirect in design and used a scintillating phosphor Electronically, the functional unit of digital fluoroscopic detectors is the DEL Spatial resolution of digital images using a flat panel detector is principally controlled by the DEL dimension Fluoroscopic digital flat panel detectors electronically combine detector elements into multiple units through a process known as Binning When compared to fluoroscopic image intensifiers, flat panel fluoroscopic digital detectors offer all of the above With digital fluoroscopic systems that use a single digital detector for both radiographic and fluoroscopy all of the above Which of the following negatively impacts spatial resolution in fluoroscopy Binning Which of the following is a key advantage of FPFD Flat surface input design Which of the following is accurate of flat panel fluoroscopic detectors All of the above With FPFD Conventional television camera pick up technology is eliminated A major distinction between digital and flat panel fluoroscopy system designs is the position of the fluoroscopic x-ray tube With a digital flat panel fluoroscopic system that positions the fluoroscopic x-ray tube above the patient during fluoroscopy the scatter radiation coming from the patient is greatest at the chest neck and eye levels of the operator When comparing flat panel fluoroscopic system designs Image resolution is essentially the same between designs A cost effective feature of a digital flat panel fluoroscopic system that positions the x-ray tube above the patient during fluoroscopy is that these system designs typically use a single digital detector for both radiography and fluoroscopy Which of the following is the primary source of operator radiation exposure during fluoroscopy patient