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