Questions and Answers
What is the proper central ray angulation and entrance point for an AP open-mouth projection of the cervical spine?
perpendicular, center of the open mouth
Which position is preferred to best demonstrate free air in the peritoneal cavity?
left lateral decubitus abdomen
Which of the following is measured by exposure?
ionization in the air
The length of the esophagus is typically?
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Which of the following would provide fluoroscopic imaging personnel with the BEST radiation protection opportunity?
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Background radiation that reaches digital image receptors could create?
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To demonstrate the lesser tubercle of the humerus in profile medially, which projection of the shoulder should be obtained?
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When removing a needle after venipuncture, the first step post removal is to?
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The resistance to electric flow through a circuit is measured in?
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What effect does increased collimation have on the amount of scatter reaching the image receptor?
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A radiograph of the abdomen is obtained using automatic exposure control. What is likely to occur if a second image is obtained after the introduction of 250 milliliters of oral barium?
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AEC would increase the _____ to maintain image receptor exposure because barium absorbs more radiation.
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The output phosphor of most modern image intensifiers is comprised of?
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The medical condition, ketoacidosis refers to?
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The medical condition, ketoacidosis occurs when?
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What is the degree and direction of tube angulation for an AP axial projection of the sacrum?
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Anoxia refers to cells having?
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An means?
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What thickness of protective shielding is required in the bucky slot cover of a fluoroscopic imaging unit?
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Scatter radiation does not affect?
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Scatter radiation may reduce the ______ of spatial resolution by obscuring anatomical structures in the image.
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Which two of the following factors will affect both the quantity and quality of the x-ray beam?
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The tech chooses to use a grid for an exam. What effect will this have on patient exposure while ensuring proper image quality?
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A grid is a device used to improve _____ of the radiographic image. It does this by _______ before it can reach the IR.
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What is the proper central ray angulation and entrance point for an AP open-mouth projection of the cervical spine?
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Which position is preferred to best demonstrate free air in the peritoneal cavity?
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Which of the following is measured by exposure?
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The length of the esophagus is typically?
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Which of the following would provide fluoroscopic imaging personnel with the BEST radiation protection opportunity?
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Background radiation that reaches digital image receptors could create?
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To demonstrate the lesser tubercle of the humerus in profile medially, which projection of the shoulder should be obtained?
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When removing a needle after venipuncture, the first step post removal is to?
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The resistance to electric flow through a circuit is measured in?
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What effect does increased collimation have on the amount of scatter reaching the image receptor?
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A radiograph of the abdomen is obtained using automatic exposure control. Which of the following is likely to occur if a second image is obtained after the introduction of 250 milliliters of oral barium?
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AEC would increase the _____ to maintain image receptor exposure because barium absorbs more radiation, therefore more exposure is needed to produce a quality radiograph.
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The output phosphor of most modern image intensifiers is comprised of?
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The medical condition, ketoacidosis refers to?
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The medical condition ketoacidosis occurs when?
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What is the degree and direction of tube angulation for an AP axial projection of the sacrum?
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Anoxia refers to cells having?
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An means?
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What thickness of protective shielding is required in the bucky slot cover of a fluoroscopic imaging unit?
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Scatter radiation does not affect recorded spatial resolution.
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Scatter radiation may reduce the ______ of spatial resolution by obscuring anatomic structures in the image, making them more difficult to see.
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Which two of the following factors will affect both the quantity and quality of the x-ray beam?
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The tech chooses to use a grid for an exam. What effect will this have on the patient exposure while ensuring proper image quality?
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A grid is a device used to improve _____ of the radiographic image. It does this by _______ before it can reach the IR.
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Critical thinking skills used during patient instruction include kinesthetic, which means learning by which method?
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Kinesthetic means?
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Which of the following projections demonstrates the frontal bone with minimal distortion and superimposition?
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Which of the following x-ray photon interactions results in the photon being completely absorbed with the patient?
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Compton scatter means?
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Coherent scatter means?
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Transmission refers to?
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Study Notes
Radiographic Techniques and Projections
- For an AP open-mouth projection of the cervical spine, central ray angulation should be perpendicular, entering at the center of the open mouth.
- The left lateral decubitus position is ideal for demonstrating free air in the peritoneal cavity.
- To see the lesser tubercle of the humerus in profile medially, perform an AP projection with internal arm rotation.
- For an AP axial projection of the sacrum, tube angulation is set at 15 degrees cephalad.
Measurement and Exposure
- Exposure is measured by the ionization of air within a controlled environment.
- The resistance of electric flow through a circuit is quantified in Ohms.
- Automatic exposure control may result in increased exposure time after ingesting 250 milliliters of oral barium due to its radiation absorption properties.
- AEC compensates for barium absorption by increasing exposure time to maintain image receptor exposure.
Radiation Protection and Effects
- Fluoroscopic imaging personnel can achieve optimal radiation protection by controlling the fluoroscopic system remotely.
- Background radiation affecting digital image receptors can cause radiation fog.
- Protective shielding of 0.25 mm lead equivalent is required in the bucky slot cover of fluoroscopic imaging units.
Scatter Radiation
- Increased collimation leads to a reduced amount of scatter reaching the image receptor.
- Scatter radiation influences spatial resolution by diminishing the visibility of anatomical structures without affecting recorded spatial resolution.
- Factors affecting both the quantity and quality of the x-ray beam include kVp (kilovolt peak) and filtration.
- Using a grid increases patient exposure while enhancing image quality through scatter reduction.
Medical Conditions and Responses
- Ketoacidosis is characterized by acute hyperglycemia, occurring when blood sugar levels exceed 400-500 mg/dL.
- Anoxia describes a condition where cells have no oxygen; "an-" denotes the absence or lack of.
X-Ray Photon Interactions
- The PA axial projection (Caldwell method) is effective in demonstrating the frontal bone with minimal distortion.
- The photoelectric effect represents complete absorption of the x-ray photon by the patient.
- Compton scatter denotes partial absorption where only some photon energy is retained within the body.
- Coherent scatter involves the photon being absorbed and re-emitted with its original energy.
Learning and Instruction
- Kinesthetic learning emphasizes understanding through physical demonstration or tactile methods.
- Critical thinking in patient instruction encompasses various learning styles, including kinesthetic.
General Knowledge and Miscellaneous
- A grid is used to improve contrast by absorbing scatter radiation before it reaches the image receptor.
- Transmission refers to cases where photons pass through the body without any interaction.
- Scatter radiation's primary impact is the visibility of anatomical structures in radiographic images.
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Description
Test your knowledge with these flashcards covering key concepts in radiologic technology. Questions include central ray angulation, patient positioning, and exposure measurements crucial for effective imaging. Perfect for those preparing for certification or bootcamp exams in radiography.
