Quiz 1
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| Film and intensifying screens are primarily used in what? | Conventional radiography
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| Intensifying screens do what? | Emit light
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| Which modality was the first to use the principle of digital imaging? | Computed tomography (CT)
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| Who was the first to incorporate digital imaging with the CT scanner? | Godfrey Hounsfield
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| Teleradiology, moving images via telephone lines to and from remote locations, was first conceptualized by who? | Albert Jutras
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| The invention of CT is heralded as? | One of the greatest milestones in medical imaging
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| Early reconstruction of raw CT data took a few ______ to form a recognizable image. | Days
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| The first commercial CT scanners could image the _____ | Head only
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| In which decade was MRI first introduced? | 1980's
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| Which two modalities could easily be converted to digital imaging properties? | 1. Ultrasonography
2. Nuclear medicine
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| Early picture archival and communication systems were first developed by | the U.S military
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| Teleradiology incorporated ____ to produce radiographic images | Telephone lines
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| One of the early goals related to the development of PACS was to | Provide a means to move battlefield images to an established hospital
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| CR acquires an image through | the use of a storage phosphor plate
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| Storage phosphor plates are similar to? | Intensifying screens
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| In a DR system, what is needed to produce a radiographic image? | X-ray absorber and CCD
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| The two elements needed to convert light signals into an electrical signal while using indirect capture DR are TFT and | photodiodes
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| The x-ray absorber typically used in direct capture DR is a | photoconductor
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| Technologist efficiency ratings are generally the same when comparing conventional radiography with _______ radiography | Computed
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| Compared with a 90 second processing time found in conventional radiography, image acquisition with DR has now been reduced to | 3-5
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| The active element in a storage phosphor is | Barium fluorohalide
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| In reference to PSP image capture, to release the latent image, which of the following devices is scanned over the phosphor plate? | Focused laser light
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| Which of the following best describes the sequence for PSP image capture? | Phosphor plate, focused laser light scanner, photomultiplier, analog digital converter, review station
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| X-ray energy related to direct capture DR will stimulate a ____, which eventually is changed into an electrical signal | Scintillator
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| The ___converts x-ray energy directly to a digital electrical signal. | Photoconductor
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| Exposure latitude is to conventional radiography as ___ is to DR | Dynamic range
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| A look up table maps | Image grayscale values
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| With conventional radiography, optical density is primarily controlled by | Milliampere-seconds
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| Preset image annotation controls include all of the following except? a.position indicators b.image acquisition markers c.arrows d.date and time stamps | Date and time stamps
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| The first full scale PACS was installed in 1993 in | Baltimore
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| All the following are components of a PACS except a.web access b.reading stations c.independent kilovoltage peak and milliampere-second stations d.multiple interfaces | independent kilovoltage peak and milliampere-second stations
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| Light exposing the film is in direct proportion to the amount and energy of the incident photon upon the screen. T or F | True
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| The earliest CT of the head took several hours to acquire a single slice of information T or F | True
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| When switching from a conventional diagnostic radiography room to one that incorporates CR, major equipment change are to be expected T or F | False
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| Similar to CR, DR can use the existing diagnostic equipment found in today’s imaging departments. T or F | False
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| Indirect capture DR converts absorbed x-ray energy into visible light T or F | True
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| A Bucky apparatus is required for DR. T or F | False
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| Many PACS reading stations also have image-processing capabilities. T or F | True
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| DICOM is a standard that allow imaging modalities and PACS to communicate in the same language T or F | True
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