RTE 1401 CHAPTER 8 AND CHAPTER 6 (ESSENTIALS BOOK)
Question 1.
Radiographic image formation
ANSWER
Process where x-rays pass through the patient, are differentially absorbed, and remnant radiation reaches the image receptor to form an image.
Question 2.
Beam attenuation
ANSWER
Reduction in x-ray beam intensity as it passes through matter due to absorption and scatter.
Question 3.
Factors affecting beam attenuation
ANSWER
Tissue density, atomic number, tissue thickness, and photon energy (kVp).
Question 4.
Photoelectric effect
ANSWER
Interaction where a photon is completely absorbed after ejecting an inner -shell electron; increases contrast and patient dose.
Question 5.
Compton effect
ANSWER
Interaction where a photon ejects an outer-shell electron and changes direction as scatter; reduces image quality.
Question 6.
Ionization
ANSWER
Removal of an electron from an atom, creating a charged atom.
Question 7.
Exit radiation
ANSWER
Radiation that exits the patient, consisting of remnant radiation and scatter radiation.
, Question 8.
Effect of scatter radiation
ANSWER
Decreases image contrast and adds fog, reducing image quality.
Question 9.
Shades of gray in the image
ANSWER
Created by differential absorption; more absorption appears white; less absorption appears darker.
Question 10.
Matrix
ANSWER
Number of pixels in a digital image; larger matrix improves spatial resolution.
Question 11.
Pixel size
ANSWER
Size of each pixel; smaller pixels improve image detail.
Question 12.
Pixel bit depth
ANSWER
Number of gray shades each pixel can display; higher bit depth improves contrast resolution.
Question 13.
Benefits of digital imaging
ANSWER
Wider exposure latitude, image manipulation, faster processing, electronic storage, fewer repeats.
Question 14.
Radiographic Imaging
ANSWER
Produces a single static image with high spatial resolution.
Question 15.
Fluoroscopic Imaging
ANSWER
Produces real-time moving images used for dynamic studies and procedures.
Question 1.
Radiographic image formation
ANSWER
Process where x-rays pass through the patient, are differentially absorbed, and remnant radiation reaches the image receptor to form an image.
Question 2.
Beam attenuation
ANSWER
Reduction in x-ray beam intensity as it passes through matter due to absorption and scatter.
Question 3.
Factors affecting beam attenuation
ANSWER
Tissue density, atomic number, tissue thickness, and photon energy (kVp).
Question 4.
Photoelectric effect
ANSWER
Interaction where a photon is completely absorbed after ejecting an inner -shell electron; increases contrast and patient dose.
Question 5.
Compton effect
ANSWER
Interaction where a photon ejects an outer-shell electron and changes direction as scatter; reduces image quality.
Question 6.
Ionization
ANSWER
Removal of an electron from an atom, creating a charged atom.
Question 7.
Exit radiation
ANSWER
Radiation that exits the patient, consisting of remnant radiation and scatter radiation.
, Question 8.
Effect of scatter radiation
ANSWER
Decreases image contrast and adds fog, reducing image quality.
Question 9.
Shades of gray in the image
ANSWER
Created by differential absorption; more absorption appears white; less absorption appears darker.
Question 10.
Matrix
ANSWER
Number of pixels in a digital image; larger matrix improves spatial resolution.
Question 11.
Pixel size
ANSWER
Size of each pixel; smaller pixels improve image detail.
Question 12.
Pixel bit depth
ANSWER
Number of gray shades each pixel can display; higher bit depth improves contrast resolution.
Question 13.
Benefits of digital imaging
ANSWER
Wider exposure latitude, image manipulation, faster processing, electronic storage, fewer repeats.
Question 14.
Radiographic Imaging
ANSWER
Produces a single static image with high spatial resolution.
Question 15.
Fluoroscopic Imaging
ANSWER
Produces real-time moving images used for dynamic studies and procedures.
