Radiographic Technique Charts Quiz

Questions and Answers

What actions should take place prior to beginning the preparation of the radiographic technique chart? (Select all that apply)

Perform a patient history review

A standard for imaging studies should be confirmed (correct)

Check the radiograph software

X-ray equipment must be calibrated by a medical physicist (correct)

A foundation technique chart is one made for which patient population?

Average sized adult patients

What is the minimal amount of kilovolts peak (kVp) that should be present on a technique chart used for computed radiography (excluding mammography)?

The principal types of radiographic technique charts are based on what factors? (Select all that apply)

Automatic exposure Signup and view all the answers

What technique factors on a technique chart influence the exposure of the image receptor (IR)? (Select all that apply)

Distance Signup and view all the answers

What technique factor controls the contrast of a radiographic image?

kVp Signup and view all the answers

When selecting radiographic technique for a pediatric patient, which factor is important to consider? (Select all that apply)

Decreased mA Signup and view all the answers

Fixed-kVp charts can be calculated with specific mAs values for how much thickness?

Every 2 cm Signup and view all the answers

Exposure directed by what type of radiographic technique chart usually results in higher patient radiation dose and less exposure latitude?

Variable kilovoltage chart Signup and view all the answers

The focal-spot size setting on a technique chart controls what technique factor?

Detail Signup and view all the answers

What is the first step in beginning the preparation of a variable-kVp radiographic technique chart?

Select the body part for examination Signup and view all the answers

A lateral image should be performed with which technical factors after taking a PA image of the skull on an average-sized infant using 75 kVp and 10 mAs?

75 kVp and 5 mAs Signup and view all the answers

What exposure factor needs to be adjusted before taking the radiograph of a patient with an obvious deformity of the forearm?

No change is needed Signup and view all the answers

For chest radiography, all skeletal tissue is penetrated and visualization of the different soft tissue mass densities present is enhanced when what kVp is selected?

110 kVp Signup and view all the answers

In which locations should radiographic technique charts be located? (Select all that apply)

In each radiographic room Signup and view all the answers

When using a fixed-kVp radiographic technique chart, what factor is adjusted according to the thickness of the anatomical part to provide the proper optical density (OD)?

Milliampere-seconds (mAs) Signup and view all the answers

Which kilovoltage setting range would be most appropriate for adequate penetration of a lateral lumbar spine on a digital system?

90-100 kVp Signup and view all the answers

What is the principal advantage of using radiographic technique charts?

Image consistency Signup and view all the answers

Which increase is needed for every centimeter of thickness difference when developing a variable-kilovoltage technique chart?

2 kVp Signup and view all the answers

To use modern x-ray generators with anatomic programmers that can store various techniques, what factor does the radiographer select?

Body part Signup and view all the answers

Using fixed-kVp charts, by what percentage does the milliampere-seconds (mAs) need to be increased to properly image a body part that is swollen as a result of trauma?

50% Signup and view all the answers

When using a fixed-kVp radiographic technique chart, by what percentage should the mAs be increased when imaging large body parts?

30% Signup and view all the answers

When a radiographic technique chart is found to be inadequate, what factors should be checked first? (Select all that apply)

Beam restrictor checked for accuracy Signup and view all the answers

Which conditions would require a decrease in the foundational technical factors on a technique chart? (Select all that apply)

Atrophy Signup and view all the answers

To prepare a high-kVp technique chart, what is the procedure similar to?

Fixed kilovoltage chart Signup and view all the answers

Radiographic technique charts and their use become an important issue with what aspect of patient care?

Patient radiation protection Signup and view all the answers

Which type of technique chart may result in more uniform images?

Fixed kilovoltage chart Signup and view all the answers

The foundation factors on the radiographic technique chart should be adjusted according to what patient factor in order to maintain uniform quality?

Size Signup and view all the answers

Which conditions would require an increase in the regular technical factors on a technique chart? (Select all that apply)

Ascites Signup and view all the answers

What would the optimum kilovolts peak (kVp) be for most extremities on fixed kVp technique charts?

60 kVp Signup and view all the answers

Upon adding a plaster cast, what effect will it have on exposure to the image receptor (IR)?

Decrease exposure to IR Signup and view all the answers

For most x-ray examinations of the spine and trunk of the body, the optimal kilovolts peak (kVp) is approximately what value on the technique charts?

80 kVp Signup and view all the answers

To prepare a fixed kilovolts peak (kVp) radiographic technique chart, what is the first step?

Separate the anatomic part thickness into three groups—small, medium, and large Signup and view all the answers

When selecting radiographic technique for a pediatric patient, which factor is important to consider? (Select all that apply)

Increased kVp Signup and view all the answers

What type of radiographic technique chart is used most often in clinical practice?

Fixed kilovoltage techniques Signup and view all the answers

What type of exposure techniques are ideal for barium work to ensure adequate penetration of the barium?

High kilovoltage techniques Signup and view all the answers

Which pathologic changes require a decrease in penetration to maintain exposure to the image receptor (IR)? (Select all that apply)

Pneumothorax Signup and view all the answers

What amount of kilovolts peak (kVp) should be used during a routine chest exam of an average-sized adult?

110-125 kVp Signup and view all the answers

Which requires the greatest adjustment to technique?

Wet plaster cast Signup and view all the answers

Which should be used to ascertain partial thickness for accurate technique selection?

Measuring caliper Signup and view all the answers

A well-designed technique chart should include adjustments for which patient populations? (Select all that apply)

Emaciated patients Signup and view all the answers

Which would be used to calculate the appropriate technique adjustment required for a forearm in a plaster cast?

Measure the part and use the technique chart to compensate for increased part thickness Signup and view all the answers

If a phantom knee measures 14 cm thick, what kilovolts peak (kVp) should be used to begin construction of a variable-kVp technique chart for a three-phase x-ray machine?

53 kVp Signup and view all the answers

An acute abdominal series is ordered on a patient with ascites. How should the radiologic technologist adjust the settings on the technique chart to adequately visualize the abdomen?

Increase the milliampere-seconds (mAs) Signup and view all the answers

Which pathologic changes require an increase in penetration to maintain the desired exposure to the image receptor (IR)? (Select all that apply)

Ascites Signup and view all the answers

Which imaging exams would most likely use a technique of 85 kilovolts peak (kVp) and 15 milliampere-seconds (mAs) for an adult? (Select all that apply)

Lateral skull Signup and view all the answers

The factors for anteroposterior (AP) shoulder are listed on a technique chart as: 85 kVp, 18 mAs, and source-to-image receptor-distance (SID) of 72 inches. Which factor is not appropriate for an AP shoulder?

SID Signup and view all the answers

When using a fixed-kVp radiographic technique chart, approximately what kVp is appropriate for the soft tissue of the abdomen?

70 kVp Signup and view all the answers

Which radiographic technique chart generally uses lower kilovolts peak (kVp)?

Variable kilovoltage chart Signup and view all the answers

A satisfactory technique chart can be established only if what criteria are met? (Select all that apply)

X-ray machine is properly calibrated by a medical physicist Signup and view all the answers

How does improper part-central ray alignment affect the image?

Distortion Signup and view all the answers

What change to the typical technique chart is necessary when imaging the abdomen of a patient with ulcerative colitis?

Decrease the milliampere-seconds (mAs) Signup and view all the answers

Upon which type of patient are radiographic technique charts based?

Sthenic Signup and view all the answers

Which kilovoltage setting range would be most appropriate for adequate penetration of a toe?

55 to 60 kVp Signup and view all the answers

Which is the minimum kVp typically found on high-kVp technique charts?

100 kVp Signup and view all the answers

Which significantly alters contrast and makes a considerable difference in any technique chart?

Total filtration on the collimator housing Signup and view all the answers

Study Notes

Radiographic Technique Charts Overview

Preparation for a radiographic technique chart requires confirmation of a standard for imaging studies and calibration of x-ray equipment by a medical physicist.
Foundation technique charts primarily cater to average-sized adult patients.

Key Technical Specifications

The minimum kilovolts peak (kVp) recommended for computed radiography is 50.
Fixed kVp charts are typically calculated using specific milliampere-seconds (mAs) values for every 2 cm of thickness.
Optimal kVp for most extremities is set at 60 kVp, while 80 kVp is standard for spine and trunk examinations.

Techniques and Adjustments

The primary types of radiographic technique charts include high kilovoltage, fixed kilovoltage, automatic exposure, and variable kilovoltage.
Variables that influence image receptor exposure include distance, grid ratio, and image receptor speed.
Contrast in a radiographic image is controlled by kVp, while mAs is adjusted based on anatomical part thickness.

Specific Patient Considerations

Pediatric patients often require lower mA and higher kVp for proper imaging.
Conditions such as atrophy, old age, and emaciation necessitate lowering foundational technical factors.
Pathological conditions like edema, ascites, and enlarged heart call for an increase in technical factors.

Equipment and Setup

Radiographic technique charts should be accessible on mobile units, in each radiographic room, and on machines that utilize automatic exposure control.
The addition of a plaster cast typically decreases exposure to the image receptor, necessitating adjustments.

Consistency and Image Quality

Fixed kilovoltage charts are recognized for their ability to produce more uniform images.
The principal advantage of utilizing technique charts is to achieve consistent imaging quality.

Calculating and Measuring Techniques

For high-kVp technique charts, the preparation process resembles that of fixed kilovoltage chart preparation.
To develop a variable-kVp technique chart, initiate by establishing thickness categories: small, medium, and large.

Special Situations

For a lateral lumbar spine, an appropriate kVp range is 90-100.
The typical kVp for chest exams of average-sized adults falls between 110-125.

Chart Adjustments

When imaging large body parts with fixed-kVp charts, mAs should typically be increased by 30%.
Optimal adjustments for patients with abdominal conditions, such as ulcerative colitis or ascites, involve manipulating mAs accordingly.

Measurement Tools

Calibration and adjustment measurements can be precisely achieved using measuring calipers for part thickness.
Patients requiring special adjustments, including obese and pediatric populations, must have technique charts tailored to their specifics.

Summary of Technique Chart Use

An adequate technique chart must reconcile radiologist image quality preferences with machine calibration standards.
Utilizing fixed or variable kilovoltage charts demands a clear understanding of patient anatomy and kVp/mAs relationships to maintain the accuracy of radiographs.

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Description

Test your knowledge on the essential actions for preparing radiographic technique charts, including necessary calibrations and patient populations. This quiz covers the foundational concepts required for effective imaging studies.

Radiographic Technique Charts Quiz

Questions and Answers

What actions should take place prior to beginning the preparation of the radiographic technique chart? (Select all that apply)

A foundation technique chart is one made for which patient population?

What is the minimal amount of kilovolts peak (kVp) that should be present on a technique chart used for computed radiography (excluding mammography)?

The principal types of radiographic technique charts are based on what factors? (Select all that apply)

What technique factors on a technique chart influence the exposure of the image receptor (IR)? (Select all that apply)

What technique factor controls the contrast of a radiographic image?

When selecting radiographic technique for a pediatric patient, which factor is important to consider? (Select all that apply)

Fixed-kVp charts can be calculated with specific mAs values for how much thickness?

Exposure directed by what type of radiographic technique chart usually results in higher patient radiation dose and less exposure latitude?

The focal-spot size setting on a technique chart controls what technique factor?

What is the first step in beginning the preparation of a variable-kVp radiographic technique chart?

A lateral image should be performed with which technical factors after taking a PA image of the skull on an average-sized infant using 75 kVp and 10 mAs?

What exposure factor needs to be adjusted before taking the radiograph of a patient with an obvious deformity of the forearm?

For chest radiography, all skeletal tissue is penetrated and visualization of the different soft tissue mass densities present is enhanced when what kVp is selected?

In which locations should radiographic technique charts be located? (Select all that apply)

When using a fixed-kVp radiographic technique chart, what factor is adjusted according to the thickness of the anatomical part to provide the proper optical density (OD)?

Which kilovoltage setting range would be most appropriate for adequate penetration of a lateral lumbar spine on a digital system?

What is the principal advantage of using radiographic technique charts?

Which increase is needed for every centimeter of thickness difference when developing a variable-kilovoltage technique chart?

To use modern x-ray generators with anatomic programmers that can store various techniques, what factor does the radiographer select?

Using fixed-kVp charts, by what percentage does the milliampere-seconds (mAs) need to be increased to properly image a body part that is swollen as a result of trauma?

When using a fixed-kVp radiographic technique chart, by what percentage should the mAs be increased when imaging large body parts?

When a radiographic technique chart is found to be inadequate, what factors should be checked first? (Select all that apply)

Which conditions would require a decrease in the foundational technical factors on a technique chart? (Select all that apply)

To prepare a high-kVp technique chart, what is the procedure similar to?

Radiographic technique charts and their use become an important issue with what aspect of patient care?

Which type of technique chart may result in more uniform images?

The foundation factors on the radiographic technique chart should be adjusted according to what patient factor in order to maintain uniform quality?

Which conditions would require an increase in the regular technical factors on a technique chart? (Select all that apply)

What would the optimum kilovolts peak (kVp) be for most extremities on fixed kVp technique charts?

Upon adding a plaster cast, what effect will it have on exposure to the image receptor (IR)?

For most x-ray examinations of the spine and trunk of the body, the optimal kilovolts peak (kVp) is approximately what value on the technique charts?

To prepare a fixed kilovolts peak (kVp) radiographic technique chart, what is the first step?

When selecting radiographic technique for a pediatric patient, which factor is important to consider? (Select all that apply)

What type of radiographic technique chart is used most often in clinical practice?

What type of exposure techniques are ideal for barium work to ensure adequate penetration of the barium?

Which pathologic changes require a decrease in penetration to maintain exposure to the image receptor (IR)? (Select all that apply)

What amount of kilovolts peak (kVp) should be used during a routine chest exam of an average-sized adult?

Which requires the greatest adjustment to technique?

Which should be used to ascertain partial thickness for accurate technique selection?

A well-designed technique chart should include adjustments for which patient populations? (Select all that apply)

Which would be used to calculate the appropriate technique adjustment required for a forearm in a plaster cast?

If a phantom knee measures 14 cm thick, what kilovolts peak (kVp) should be used to begin construction of a variable-kVp technique chart for a three-phase x-ray machine?

An acute abdominal series is ordered on a patient with ascites. How should the radiologic technologist adjust the settings on the technique chart to adequately visualize the abdomen?

Which pathologic changes require an increase in penetration to maintain the desired exposure to the image receptor (IR)? (Select all that apply)

Which imaging exams would most likely use a technique of 85 kilovolts peak (kVp) and 15 milliampere-seconds (mAs) for an adult? (Select all that apply)

The factors for anteroposterior (AP) shoulder are listed on a technique chart as: 85 kVp, 18 mAs, and source-to-image receptor-distance (SID) of 72 inches. Which factor is not appropriate for an AP shoulder?

When using a fixed-kVp radiographic technique chart, approximately what kVp is appropriate for the soft tissue of the abdomen?

Which radiographic technique chart generally uses lower kilovolts peak (kVp)?

A satisfactory technique chart can be established only if what criteria are met? (Select all that apply)

How does improper part-central ray alignment affect the image?

What change to the typical technique chart is necessary when imaging the abdomen of a patient with ulcerative colitis?

Upon which type of patient are radiographic technique charts based?

Which kilovoltage setting range would be most appropriate for adequate penetration of a toe?

Which is the minimum kVp typically found on high-kVp technique charts?

Which significantly alters contrast and makes a considerable difference in any technique chart?

Study Notes

Radiographic Technique Charts Overview

Key Technical Specifications

Techniques and Adjustments

Specific Patient Considerations

Equipment and Setup

Consistency and Image Quality

Calculating and Measuring Techniques

Special Situations

Chart Adjustments

Measurement Tools

Summary of Technique Chart Use

Studying That Suits You

Description

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