Podcast
Questions and Answers
What actions should take place prior to beginning the preparation of the radiographic technique chart? (Select all that apply)
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?
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)?
What is the minimal amount of kilovolts peak (kVp) that should be present on a technique chart used for computed radiography (excluding mammography)?
50
The principal types of radiographic technique charts are based on what factors? (Select all that apply)
The principal types of radiographic technique charts are based on what factors? (Select all that apply)
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)
What technique factors on a technique chart influence the exposure of the image receptor (IR)? (Select all that apply)
Signup and view all the answers
What technique factor controls the contrast of a radiographic image?
What technique factor controls the contrast of a radiographic image?
Signup and view all the answers
When selecting radiographic technique for a pediatric patient, which factor is important to consider? (Select all that apply)
When selecting radiographic technique for a pediatric patient, which factor is important to consider? (Select all that apply)
Signup and view all the answers
Fixed-kVp charts can be calculated with specific mAs values for how much thickness?
Fixed-kVp charts can be calculated with specific mAs values for how much thickness?
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?
Exposure directed by what type of radiographic technique chart usually results in higher patient radiation dose and less exposure latitude?
Signup and view all the answers
The focal-spot size setting on a technique chart controls what technique factor?
The focal-spot size setting on a technique chart controls what technique factor?
Signup and view all the answers
What is the first step in beginning the preparation of a variable-kVp radiographic technique chart?
What is the first step in beginning the preparation of a variable-kVp radiographic technique chart?
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?
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?
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?
What exposure factor needs to be adjusted before taking the radiograph of a patient with an obvious deformity of the forearm?
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?
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?
Signup and view all the answers
In which locations should radiographic technique charts be located? (Select all that apply)
In which locations should radiographic technique charts be located? (Select all that apply)
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)?
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)?
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?
Which kilovoltage setting range would be most appropriate for adequate penetration of a lateral lumbar spine on a digital system?
Signup and view all the answers
What is the principal advantage of using radiographic technique charts?
What is the principal advantage of using radiographic technique charts?
Signup and view all the answers
Which increase is needed for every centimeter of thickness difference when developing a variable-kilovoltage technique chart?
Which increase is needed for every centimeter of thickness difference when developing a variable-kilovoltage technique chart?
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?
To use modern x-ray generators with anatomic programmers that can store various techniques, what factor does the radiographer select?
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?
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?
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?
When using a fixed-kVp radiographic technique chart, by what percentage should the mAs be increased when imaging large body parts?
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)
When a radiographic technique chart is found to be inadequate, what factors should be checked first? (Select all that apply)
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)
Which conditions would require a decrease in the foundational technical factors on a technique chart? (Select all that apply)
Signup and view all the answers
To prepare a high-kVp technique chart, what is the procedure similar to?
To prepare a high-kVp technique chart, what is the procedure similar to?
Signup and view all the answers
Radiographic technique charts and their use become an important issue with what aspect of patient care?
Radiographic technique charts and their use become an important issue with what aspect of patient care?
Signup and view all the answers
Which type of technique chart may result in more uniform images?
Which type of technique chart may result in more uniform images?
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?
The foundation factors on the radiographic technique chart should be adjusted according to what patient factor in order to maintain uniform quality?
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)
Which conditions would require an increase in the regular technical factors on a technique chart? (Select all that apply)
Signup and view all the answers
What would the optimum kilovolts peak (kVp) be for most extremities on fixed kVp technique charts?
What would the optimum kilovolts peak (kVp) be for most extremities on fixed kVp technique charts?
Signup and view all the answers
Upon adding a plaster cast, what effect will it have on exposure to the image receptor (IR)?
Upon adding a plaster cast, what effect will it have on exposure to the image receptor (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?
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?
Signup and view all the answers
To prepare a fixed kilovolts peak (kVp) radiographic technique chart, what is the first step?
To prepare a fixed kilovolts peak (kVp) radiographic technique chart, what is the first step?
Signup and view all the answers
When selecting radiographic technique for a pediatric patient, which factor is important to consider? (Select all that apply)
When selecting radiographic technique for a pediatric patient, which factor is important to consider? (Select all that apply)
Signup and view all the answers
What type of radiographic technique chart is used most often in clinical practice?
What type of radiographic technique chart is used most often in clinical practice?
Signup and view all the answers
What type of exposure techniques are ideal for barium work to ensure adequate penetration of the barium?
What type of exposure techniques are ideal for barium work to ensure adequate penetration of the barium?
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)
Which pathologic changes require a decrease in penetration to maintain exposure to the image receptor (IR)? (Select all that apply)
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?
What amount of kilovolts peak (kVp) should be used during a routine chest exam of an average-sized adult?
Signup and view all the answers
Which requires the greatest adjustment to technique?
Which requires the greatest adjustment to technique?
Signup and view all the answers
Which should be used to ascertain partial thickness for accurate technique selection?
Which should be used to ascertain partial thickness for accurate technique selection?
Signup and view all the answers
A well-designed technique chart should include adjustments for which patient populations? (Select all that apply)
A well-designed technique chart should include adjustments for which patient populations? (Select all that apply)
Signup and view all the answers
Which would be used to calculate the appropriate technique adjustment required for a forearm in a plaster cast?
Which would be used to calculate the appropriate technique adjustment required for a forearm in a plaster cast?
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?
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?
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?
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?
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)
Which pathologic changes require an increase in penetration to maintain the desired exposure to the image receptor (IR)? (Select all that apply)
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)
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)
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?
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?
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?
When using a fixed-kVp radiographic technique chart, approximately what kVp is appropriate for the soft tissue of the abdomen?
Signup and view all the answers
Which radiographic technique chart generally uses lower kilovolts peak (kVp)?
Which radiographic technique chart generally uses lower kilovolts peak (kVp)?
Signup and view all the answers
A satisfactory technique chart can be established only if what criteria are met? (Select all that apply)
A satisfactory technique chart can be established only if what criteria are met? (Select all that apply)
Signup and view all the answers
How does improper part-central ray alignment affect the image?
How does improper part-central ray alignment affect the image?
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?
What change to the typical technique chart is necessary when imaging the abdomen of a patient with ulcerative colitis?
Signup and view all the answers
Upon which type of patient are radiographic technique charts based?
Upon which type of patient are radiographic technique charts based?
Signup and view all the answers
Which kilovoltage setting range would be most appropriate for adequate penetration of a toe?
Which kilovoltage setting range would be most appropriate for adequate penetration of a toe?
Signup and view all the answers
Which is the minimum kVp typically found on high-kVp technique charts?
Which is the minimum kVp typically found on high-kVp technique charts?
Signup and view all the answers
Which significantly alters contrast and makes a considerable difference in any technique chart?
Which significantly alters contrast and makes a considerable difference in any technique chart?
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.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
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.
