CT Equipment and Reconstruction Terms

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Across
  1. 4. used to optimize visualization of specific tissues or lesions (Kelley & Petersen, 2013)
  2. 7. hardware and software that allow computers to be connected for the purpose of sharing resources and interacting (Lampignano & Kendrick, 2018)
  3. 12. radiographic examination that displays sectional anatomic images in axial, sagittal, or coronal planes (Lampignano & Kendrick, 2018)
  4. 13. the extension or contraction of the helix; the ratio of the distance the table moves during one 360-degree tube rotation to the total beam collimation (Carlton, Balac, & Adler, 2020)
  5. 17. method by which images acquired in the axial plane may be reconstructed in the coronal or sagittal plane (Lampignano & Kendrick, 2018)
  6. 23. central opening in the gantry- the patient will move through here during the scan (Lampignano & Kendrick, 2018)
  7. 24. the movable frame of the computed tomography unit; houses the x-ray tube, detectors, and collimators (Lampignano & Kendrick, 2018)
  8. 25. allows the technologist to control the protocol and view or manipulate the images generated (Lampignano & Kendrick, 2018)
  9. 26. preliminary image of a CT examination that is used to plan the range of the scan; depending on the vendor, it may be called a topogram or a scout (Lampignano & Kendrick, 2018)
  10. 27. the digital processing that sets the density/brightness of the image (Kelley & Petersen, 2013)
Down
  1. 1. number that represents the attenuation value for each pixel, relative to water (Lampignano & Kendrick, 2018)
  2. 2. a device with attached brushes that allows the circuit to remain stationary while the armature rotates without breaking the electrical contact between them. (Carlton, Balac, & Adler, 2020)
  3. 3. a square series of boxes that gives form to the image (Carlton, Balac, & Adler, 2020)
  4. 5. parameter that allows for the adjustment of gray scale (number of shades of gray). (Kelley & Petersen, 2013)
  5. 6. technique used to view vessels as demonstrated in CT angiography (Lampignano & Kendrick, 2018)
  6. 8. predetermined procedure; in CT, protocol refers to the parameters of an examination (Lampignano & Kendrick, 2018)
  7. 9. computer that serves as a digital post-processing station or an image review station (Lampignano & Kendrick, 2018)
  8. 10. affects patient dose and efficiency of the CT unit. The detectors convert transmitted x-ray energy into light, which is converted into electrical energy and then into a digital signal (Lampignano & Kendrick, 2018)
  9. 11. volume element; corresponds to a three-dimensional tissue volume, having height, width, and depth; each pixel represents a voxel when an image is viewed (Lampignano & Kendrick, 2018)
  10. 14. manages the hardware, preprocessing, image reconstruction, and post-processing operations; has incredible speed and memory capacity (Lampignano & Kendrick, 2018)
  11. 15. section of the object that is being scanned (Lampignano & Kendrick, 2018)
  12. 16. undesirable feature or density in an image not representative of anatomy (Lampignano & Kendrick, 2018)
  13. 18. limits the beam, which reduces patient dose and improves image quality (Lampignano & Kendrick, 2018)
  14. 19. refers to acquisition of a volume of CT data; the patient moves through the gantry with uninterrupted rotation and output of the x-ray tube; also may be referred to as helical or spiral scanning (Lampignano & Kendrick, 2018)
  15. 20. in CT, it is a table that is electronically linked to the gantry for controlled movement through the aperture during the scan (Lampignano & Kendrick, 2018)
  16. 21. picture elements; individual matrix boxes (Carlton, Balac, & Adler, 2020)
  17. 22. in CT, it is similar to a general radiographic tube in construction and operation; however, it is able to withstand additional heat capacity because of increased exposure times (Lampignano & Kendrick, 2018)