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Image Production Flashcards

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1
Q

When post-processing a digital image, which technique is used to selectively enhance specific areas of interest without affecting the entire image?

A

Region of interest (ROI) processing

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2
Q

Refer to the graph. What does the shift from Curve A to Curve B primarily indicate about the x-ray beam?

A

Increased quality and quantity

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3
Q

A new x-ray machine is installed in your department with 3.5 mm of aluminum equivalent filtration. The previous machine had 3.0 mm of aluminum equivalent. What does this increased amount of filtration have on receptor exposure?

A

Decreased image receptor exposure

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4
Q

Which of these factors would likely decrease spatial resolution in the radiographic image?

A

Increased motion

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5
Q

In a fixed fluoroscopic unit, how does the use of an image intensifier affect patient radiation dose?

A

It decreases the dose by enhancing image brightness

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5
Q

A radiologic technologist is performing an abdominal radiograph on a pediatric patient. Which of the following techniques would minimize patient exposure while maintaining diagnostic image quality?

A

Increasing the kVp and reducing the mAs

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6
Q

What is the role of Modulation transfer function (MTF) in the assessment of imaging system performance?

A

It evaluates how well the system resolves image detail

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7
Q

When imaging an elderly patient with osteoporosis (decreased bone dentisy) for a chest radiograph, which adjustment should be considered to account for decreased bone density?

A

Decreased the kVp

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8
Q

In fluoroscopy, how does the use of the air kerma display benefit the technologist and patient?

A

It provides immediate feedback on patient dose

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9
Q

A technologist observes that a skull radiograph has a high noise levels. Which adjustments during image acquisition or processing is most effective for reducing noise while preserving image detail?

A

Increasing mAs

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10
Q

Coherent interactions typically occur with a beam carrying less than:

A

10 keV

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11
Q

What is the primary result of electrons decelerating in the anode during x-ray production?

A

Production of heat

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12
Q

What function does the Automatic Brightness Control (ABC) serve in a fluoroscopic system?

A

It maintains consistent image quality under varying exposures

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13
Q

Which technique reduces radiation exposure to the patient by decreasing the volume of tissue irradiated?

A

Beam collimation

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14
Q

A technologist is calibrating a new radiographic imaging system. Which parameter should be prioritized to ensure the highest quality of displayed images?

A

The luminance uniformity across the monitor

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15
Q

Which type of dosimeter is most suitable for providing immediate readings of radiation exposure?

A

Pocket ionization chamber

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16
Q

What is the primary advantage of using higher-resolution display monitors in radiographic imaging?

A

To enhance the visibility of subtle anatomical structures

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17
Q

What is the main reason for integrating advanced data compression techniques in radiographic image processing?

A

To decrease the file size without compromising data integrity

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18
Q

A forearm radiograph is acquired using 2.5 milliampere-seconds (mAs) and 60 kilovoltage peak (kVp). In order to double image receptor exposure without other technique changes, what new kVp is required?

A

69 kVp

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19
Q

Increasing the SID can influence which two of the following? (select two)

A
  • Distortion
  • Image receptor (IR) exposure
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20
Q

How does the use of pulsed fluoroscopy contribute to radiation safety?

A

By reducing the radiation dose to the patient

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20
Q

How does the use of a dose area product (DAP) meter contribute to minimizing patient exposure during radiographic procedures?

A

By providing real-time feedback on the cumulative radiation dose

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21
Q

Why is it important to evaluate the presence of artifactual shadows in a radiograph?

A

To ensure that diagnostic information is not obscured

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22
Q

What role does automatic rescalling play in the display of radiographic images?

A

It alters the brightness levels in the histogram

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23
What is the primary function of collimators in radiographic imaging?
To adjust the size and shape of the X-ray beam to the area of interest
24
What is the primary impact of routine calibration of radiographic imaging equipment on patient care?
It ensures images are produced with minimal radiation exposure
24
Rotating anodes are used in x-ray tubes to:
Increase heat dissipation
25
What role does the rotor play in an X-ray tube?
To rotate the anode, allowing it to handle more heat
26
During mobile radiography, why is it important for the technologist to communicate clearly with nearby medical staff?
To ensure all personnel maintain a safe distance
27
During the evaluation of an imaging system’s calibration using a phantom, what aspect should a technologist assess to ensure optimal contrast resolution?
Distinction between different density regions
27
What percentage of the central axis beam intensity is emitted from the anode side of the tube?
75%
28
What role does the cathode play in the functioning of an x-ray tube?
It serves as the source of electrons used for x-ray production
28
How does proper beam restriction affect image quality and patient radiation dose?
Increases image quality and decrease patient dose
29
A technologist adjusts the exposure settings to improve the diagnostic quality of a radiographic image. Increasing which setting would most directly increase the image signal strength?
mAs
29
What role do lead aprons play in radiographic imaging?
They protect areas outside the field of interest by absorbing x-ray photons.
30
In radiographic imaging, why is it essential to utilize display monitors with minimal lag time?
To enable real-time imaging during dynamic studies
31
A technologist notices that images of a patient’s thoracic spine are constantly exhibiting suboptimal contrast. What could be the most effective adjustment to enhance image contrast in this scenario
Reduce the kVp setting
32
In a MIMPS environment, what is the purpose of RAID ( Redundant Array of Independent Disks) in managing medical images?
To provide data redundancy and improve fault tolerance
33
In pediatric radiography, which two (2) elements of documentation are crucial for dose tracking over time? (select two)
- Number of retakes - Previous exposure history
34
How does documenting the use of collimation during a radiographic exam impact dose calculation?
Collimation reduces the area exposed, directly affecting the calculated dose
35
The gain or loss of an electron is termed:
Ionization
35
How does adding filtration affect the x-ray beam’s spectrum?
Decreases the quantity of low-energy photons, hardening the beam.
36
During a pediatric radiography, which of the following is the MOST effective method for reducing radiation dose without compromising image quality?
Employing automatic exposure control (AEC)
37
Which of the following technical factors is the controlling factor for image receptor (IR) exposure?
Milliampere-seconds (mAs)
38
How can improper use of radiographic markers impact patient care?
It can lead to misinterpretation of the images
39
A patient with a hypersthenic body habitus requires a lateral thoracic spine radiograph, but standard technical factors result in inadequate penetration with appropriate exposure levels. Which procedural adaptation can improve image quality while maintaining exposure?
Increase kVp and adjust mAs accordingly
40
How does the patient’s body composition affect the radiologic technologist’s exposure to scatter radiation during an examination?
Increased body mass increases the amount of scatter radiation
41
During an inspection, a radiologic technologist observes that digital radiographers are consistently appearing too dark, despite correct exposure parameters. Which setting adjustments on the display monitor is most likely to rectify this issue?
Adjust the luminance settings
42
Which component collects the electric signal in indirect digital receptors?
Detector array
43
When adjusting fluoroscopy settings to minimize patient dose, which of the following factors should be prioritized?
Selection of appropriate exposure factors
44
What is the primary factor influencing spatial resolution in a digital radiographic image?
Pixel size
45
What is the importance of high contrast resolution in digital radiography display monitors?
It enables effective differentiation between very similar tissue densities
46
Which of the following is one reason iodine is used as a contrast medium in radiography?
K-shell binding energy
47
Digital image receptors with a large detector element (DEL) pitch will have:
Decreased spatial resolution
47
During fluoroscopy, what is the primary purpose of using a pulsed x-ray beam?
To reduce radiation dose
48
A patient with advanced Paget’s disease of the skull presents for an X-ray. How should the technologist adjust the exposure settings?
Increase the KVP and mAs settings
49
A characteristic photon is named for:
The shell being filled
50
When discussing raw data in image processing, which of the following best describes the purpose of noise reduction algorithms?
To decrease the random fluctuations in image data
50
Which feature of a mobile radiographic unit primarily contributes to its ability to be used in varied clinical environments?
High-capacity battery packs
50
Which of the following two (2) factors increases the proportion of photons interacting by the photoelectric effect?
- Imaging tissues with a high atomic number - Using a positive contrast media
51
When comparing two radiographic procedures with identical technical settings but different collimated field sizes, what effect does the field size have on the DAP?
Large field sizes result in a higher DAP due to increased beam area
52
When comparing two radiographs of the shoulder where one shows more blurring than the other, what could be the primary factor contributing to the sharper image?
Decreased exposure time
53
What is the primary benefit of integrating MIMPS with an EHR system?
Enhanced workflow efficiency and comprehensive patient care
54
An underexposed image might produce an image artifact called:
Quantum noise
55
A radiographer is evaluating different display monitors for optimal image resolution. Which characteristic of display monitors is crucial for accurate radiographic image interpretation?
Pixel pitch
56
Which of the following is the primary reason why radiographic markers are considered a part of the legal medical record?
They document laterality and positioning
57
In a fixed fluoroscopic unit, how does the use of an image intensifier affect patient radiation dose?
It decreases the dose by enhancing image brightness
58
A technologist’s radiographic markers have three small metal balls in each marker. What is the purpose of these metal balls?
To indicate patient position
59
Increasing the field of view will have what effect on the pixel size?
Increased pixel size
60
A technologist selects an exposure setting of 90 kVp and 10 mAs for a chest x-ray. Which statement best describes the effect of this technique on image contrast?
High kVp results in low contrast
60
A radiologic technologist is preparing a series of fluoroscopic exams. Which of the following practices best applies the principle of time to minimize radiation exposure?
Using intermittent fluoroscopy with the shortest possible exposure times
61
A radiologic technologist is adjusting the filtration settings for a radiographic unit. How does filtration impact the contrast resolution of the resulting image?
Increasing filtration reduces contrast resolution
62
In digital radiography, what effect dose increasing the kVp have on the contrast of the image?
Decreases contrast
62
Why is it important for a radiologic technologist to wear a personal dosimeter?
To measure cumulative radiation exposure
63
How does the application of a lossless digital image compression algorithm impact the storage of the radiographic images?
It reduces required storage space without losing image quality
64
Which three of the following factors would produce a radiographic image with the highest spatial resolution?
- decreased field of view - decreased pixel size - increased matrix size
64
For a patient with Paget’s (bones denser) disease undergoing a radiographic examination of the femur, which procedural modification is necessary?
Increase kVp
64
During a pediatric abdominal fluoroscopy procedure, which technique shown in the image should be prioritized to minimize radiation exposure without compromising diagnostic quality?
Applying intermittent fluoroscopy with manual exposure control
65
Increasing kVp results in which two of the following?
- increased photon energy - increased photon penetrability
66
What is the primary impact of routine calibration of radiographic imaging equipment on patient care?
It ensures images are produced with minimal radiation exposure
67
Which two of the following are the most common grid ratios used in fluoroscopy?
- 6:1 - 10:1
68
The brightness of a digital display device is measured in:
Candela per square meter
69
Why is consistent calibration of radiographic equipment important in achieving reliable diagnostic results?
It maintains the accuracy of image reproduction over time
70
When imaging an elderly patient with osteoporosis for a chest radiograph, which adjustment should be considered to account for decreased bone density?
Decrease the kVp
71
How does the application of a low-pass filter impact the appearance of a digital radiographic image?
Reduce image noise
72
When reviewing an abdominal radiograph, a radiologist needs to enhance the visibility of anatomical structures. Which adjustment would likely be most effective?
Adjust contrast using post-processing software
73
The envelope that surrounds the x-ray tube is most commonly made of:
Pyrex
73
What type of barrier is most effective for protecting radiologic technologies from scatter radiation in a fixed radiographic room?
Lead-lined walls and control booth
74
Which of the following is a recommended guideline for using mobile radiography units inside intensive care units (ICUs)?
Use lead shields or aprons to protect other patients and staff
75
Which factor has the greatest impact on the production of characteristic radiation in the x-ray tube?
Target material
75
The overall ability of an image intensifier to increase image illumination is called:
Brightness gain
75
When ionization occurs, which of the following is separated from the atom?
Electron
76
What is the main purpose of conducting a signal to noise ratio (SNR) test in digital radiography?
To assess the clarity and sharpness of the image
77
Which of the following describes the primary function of rectifiers in x-ray generators?
Converting alternating current (AC) to direct current (DC)
78
Which of the following best describes the reason for using dose area product (DAP) as a metric in radiography?
To measure the total radiation exposure to the patient from a procedure
79
In digital radiography, what is the effect of an increased bit depth?
More shades of gray available
80
Which factor is most crucial for maintaining high image quality in computed radiography?
Proper handling and storage of the image plate
81
Which of the following are NOT used in direct capture DR systems?
Plate readers
82
What is the primary reason radiographic markers should be placed at the edge of the collimated field
To avoid superimposing over citical anatomy
83
Radiographs that present with significantly decreased exposure on the lateral edges if the image and normal exposure in the center is most likely caused by which focused grid error?
Upside-down grid error
84
What is the appropriate AEC adjustment when imaging a patient who has undergone silicone breast implant surgery?
Decrease the sensitivity of the AEC detectors
85
A technologist is performing a linearity test on a radiographic unit. What is the primary purpose of this test?
To ensure the output radiation dose is proportional to the set mAs
86
During a digital radiographic procedure, if an image appears too dark, indicating overexposure, what initial adjustment should the technologist consider based on the technique chart?
Decrease mAs
87
In a lateral cervical spine radiograph, the technologist notes that C7-T1 appears less sharp than C2-C3. What factor could be primarily contributing to this difference in spatial resolution?
Anatomical thickness differences
88
Which of the following scenarios would most likely require recalibration of the AEC system?
After replacing the X-ray tube
89
What is the main reason for integrating advanced data compression techniques in radiographic image processing?
To decrease the file size without compromising data integrity
90
Which factor would most likely improve the spatial resolution in a radiographic image of the wrist?
Decreasing the FSS
91
When conducting a quality control test for spatial resolution of a digital imaging system, which of the following tools is commonly used?
Line pair gauge
92
The primary function of the analog to digital converter in a CR plate reader is to convert:
Electrical signals into binary signals
93
In the context of digital radiography, what is the likely implication of a lower than expected exposure indicator value on a knee radiograph where soft tissues are well visualized?
Automatic rescalling fixed underexposure
94
What is a significant advantage of using a Vendor Neutral Archive (VNA) in a MIMPS environment?
Improved interoperability and data migration
95
What is the recommended AEC adjustment when imaging a limb with a plaster cast?
Decreased detector sensitivity
96
How does the application of a low-pass filter impact the appearance of a digital radiographic image?
Reduces image noise
97
For patients with scoliosis, how should the AEC detectors be positioned during spinal imaging to ensure optimal exposure?
Position detectors at the densest area of the spine
98
When reviewing a radiograph of the wrist, what is a key indicator that proper collimation has been achieved?
The absence of scatter radiation artifacts
99
Which AEC detectors should be activated for a right shoulder X-ray series?
Select the center AEC detector to align with the right shoulder
100

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