front 1 The first full-scale PACS was installed in 1993 in | back 1 Baltimore |
front 2 A look-up table maps | back 2 image gray scale values |
front 3 Which of the following best describes the sequence for PSP image capture? | back 3 Phosphor plate, focused laser light scanner, photomuliplier, analog-digital converter, review station |
front 4 The earliest CT of the head took several hours to acquire a single slice of information. True or False | back 4 True |
front 5 DICOM is a standard that allows imaging modalities and PACS to communicate in the same language. True or False | back 5 True |
front 6 Film and intensifying screens are primarily used in | back 6 conventional radiography |
front 7 CR acquires an image through | back 7 the use of a storage phosphor plate |
front 8 The invention of CT is heralded as | back 8 one of the greatest milestones in medical imaging |
front 9 Teleradiography incorporated _____ to produce radiographic images. | back 9 telephone lines |
front 10 When switching from a conventional diagnostic radiography room to one that incorporates CR major equipment changes are to be expected. True or False | back 10 False |
front 11 Early reconstruction of raw CT data took a few _____ to form a recognizable image. | back 11 days |
front 12 Early picture archival and communication systems were first developed | back 12 by the U.S. military |
front 13 Technologist efficiency ratings are generally the same when comparing conventional radiography with _____ radiography. | back 13 computed |
front 14 Which modality was the first to use the principle of digital imaging? | back 14 Computed tomography (CT) |
front 15 Indirect capture DR converts absorbed x-ray energy into visible light. True or False | back 15 True |
front 16 Storage phosphor plates are similar to | back 16 intensifying screens |
front 17 The _____ converts x-ray energy directly to a digital electrical signal | back 17 photoconductor |
front 18 Who was the first to incorporate digital imaging with the CT scanner | back 18 Godfrey Hounsfield |
front 19 Exposure latitude is to conventional radiography as ____ is to DR. | back 19 dynamic range |
front 20 The two elements needed to convert light signals into an electrical signal while using indirect capture DR are TFT and | back 20 photodiodes |
front 21 Similar to CR, DR can use the existing diagnostic equipment found in today's imaging departments. True or False | back 21 False |
front 22 Present image annotation controls include all of the following except | back 22 date and time stamps |
front 23 In which decades was MRI first introduced | back 23 1980s |
front 24 A bucky apparatus is required for DR. True or False | back 24 False |
front 25 Storage phosphor plates are made with an active element of barium fluorohalide. What is the activator in the storage phosphor plate? | back 25 barium |
front 26 Many PACS reading stations also have image-processing capabilities. True or False | back 26 True |
front 27 In a DR system, which of the following are needed to produce a radiographic image? | back 27 X-ray absorber and a CCD |
front 28 In conventional radiography film processing, the sensitivity speck has which electrical charge? | back 28 Negative |
front 29 One of the early goals related to the development of PACS was to | back 29 provide a means to move battlefield images to an established hospital |
front 30 All of the following are components of a PACS except | back 30 independent kilovoltage peak and milliampere-second stations |
front 31 Teleradiography, moving images via telephone lines to and from remote locations, was first conceptualized by | back 31 Albert Jutras |
front 32 In reference to PSP iamge capture, to release the latent image, which of the following devices is scanned over the phosphor plate? | back 32 Focused laser light |
front 33 With conventional radiography, optical density is primarily controlled by | back 33 milliampere-seconds |
front 34 X-ray energy related to indirect capture DR will stimulate a ____, which eventually is changed into an electrical signal | back 34 scintillator |
front 35 Intensifying screens | back 35 emit light |
front 36 Which two modalities could easily be converted to digital image properties | back 36 Ultrasonography and nuclear medicine |
front 37 The x-ray absorber typically used in direct capture DR is a | back 37 photoconductor |
front 38 Compared with a 90-second processing time found in conventional radiography, image acquisition with DR has now been reduced to | back 38 3-5 seconds |
front 39 Light exposing the film is in direct proportion to the amount and energy of the incident photon upon the screen. True or False | back 39 True |
front 40 The first commercial CT scanners could image the | back 40 head only |
front 41 The ability of a digital system to display subtle changes in shades of gray is called | back 41 contrast resolution |
front 42 If a pixel has a bit depth of 2 to the 9th, the number of gray tones that pixel can produce is | back 42 512 |
front 43 A system's ability to respond to varying levels of exposure, resulting in more detail, is referred to as | back 43 dynamic range |
front 44 A perfect image processing system would have an MTF of | back 44 100% |
front 45 How dark or light a digital image appears on a display monitor is known as | back 45 brightness |
front 46 The size of the pixel is determined by the | back 46 matrix |
front 47 "The sum of the components in a recording system cannot be greater than the system as a whole" is a definition of | back 47 modulation transfer function (MTF) |
front 48 The efficiency of a system to convert x-ray input signal into a useful output image is known as | back 48 detective quantum efficiency |
front 49 The more light spread, the ____ the MTF. | back 49 lower |
front 50 The range of exposure values the image detector is able to produce is known as | back 50 latitude |