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Imaging 1 Foundations Quiz
40 Questions
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Imaging 1 Foundations Quiz

Created by
@GratefulHyperbolic

Questions and Answers

What is one of the primary advantages of using a Chest Radiograph (CXR) over a CT scan for patients with shortness of breath in an Emergency Room setting?

  • CXR provides more detailed images of soft tissues.
  • CXR uses a higher dose of radiation.
  • CXR is a quicker preliminary assessment. (correct)
  • CXR can identify all types of pulmonary conditions.

    • Which of the following is NOT a critical anatomical marker that students should identify when reading a Chest Radiograph?

  • Liver (correct)
  • Trachea
  • Diaphragm
  • Aortic arch

    • In which scenario is a CT scan considered superior to a CXR?

  • Assessing suspected pneumonia.
  • Visualizing a pulmonary embolism. (correct)
  • Detecting fractured ribs.
  • Evaluating fluid in the pleural space.

    • Which organ is NOT typically identified on an abdominal X-ray?

    <p>Pancreas</p> Signup and view all the answers

    When interpreting an abdominal CT scan with contrast, which structure should be easily identifiable?

    <p>Gallbladder</p> Signup and view all the answers

    What is a disadvantage of using Ultrasound compared to CT scan in screening for abdominal trauma?

    <p>Ultrasound has limited visualization in overweight patients.</p> Signup and view all the answers

    Which method is primarily used for teaching during this Imaging session?

    <p>Team-Based Learning (TBL)</p> Signup and view all the answers

    What is the goal of the sessions connected to Imaging in terms of curricular objectives?

    <p>To identify major anatomical structures in imaging.</p> Signup and view all the answers

    What is primarily visualized in a chest X-ray due to its opacity characteristics?

    <p>Air-filled lungs</p> Signup and view all the answers

    Which anatomical structure appears more opaque on a chest X-ray due to its composition?

    <p>Ribs</p> Signup and view all the answers

    What is a common use of chest radiography in an acute setting?

    <p>Identification of rib fractures</p> Signup and view all the answers

    What role does intravenous iodinated contrast play in chest computed tomography (CT)?

    <p>Enhances visualization of intravascular pathology</p> Signup and view all the answers

    Which feature distinguishes chest CT from chest X-ray regarding imaging density?

    <p>CT reveals more detailed anatomical structures</p> Signup and view all the answers

    In chest imaging, where is the carina located?

    <p>Between the trachea and the bronchi</p> Signup and view all the answers

    Which condition is a chest X-ray most likely used to identify in an acute trauma situation?

    <p>Pneumothorax</p> Signup and view all the answers

    When enhanced with contrast in CT, how does the appearance of intravascular structures change?

    <p>They appear white, representing increased density</p> Signup and view all the answers

    What is the primary reason chest radiographs are the most common imaging test performed?

    <p>They are inexpensive and have low radiation exposure.</p> Signup and view all the answers

    Which statement accurately describes the primary function of Computed Tomography (CT)?

    <p>CT creates cross-sectional images for detailed anatomy evaluation.</p> Signup and view all the answers

    Why is a portable X-ray machine particularly advantageous in emergency situations?

    <p>It can be taken to the patient’s bedside for immediate evaluation.</p> Signup and view all the answers

    In comparison to traditional radiographs, what is a disadvantage of CT imaging?

    <p>It uses a higher dose of radiation.</p> Signup and view all the answers

    What aspect of imaging does Computed Tomography excel in compared to conventional X-ray imaging?

    <p>Eliminating the overlap of anatomical structures.</p> Signup and view all the answers

    Which of the following best describes the general process of X-ray radiography?

    <p>An X-ray beam passes through the patient, creating an image based on density variations.</p> Signup and view all the answers

    What is a key limitation of CT scans compared to chest radiographs?

    <p>CT machines are not portable.</p> Signup and view all the answers

    How many chest radiographs are performed approximately every year in the US?

    <p>80 million</p> Signup and view all the answers

    What is a primary use of chest CT in an acute setting?

    <p>Diagnosing pulmonary embolism</p> Signup and view all the answers

    Why is CT preferred over chest X-ray for lung cancer screening?

    <p>CT detects smaller cancers due to higher sensitivity</p> Signup and view all the answers

    What can abdominal radiographs effectively diagnose in an acute setting?

    <p>Pneumoperitoneum</p> Signup and view all the answers

    Which anatomical structures are generally not well visualized on abdominal radiographs?

    <p>Liver and spleen</p> Signup and view all the answers

    What type of imaging modality is preferable for evaluating intrabdominal pathology?

    <p>Abdominal ultrasound</p> Signup and view all the answers

    In cases of small bowel obstruction, what would be noted on an abdominal radiograph?

    <p>Dilated air-filled bowel loops</p> Signup and view all the answers

    What is the advantage of abdominal CT in anatomical visualization?

    <p>Provides detailed anatomy of all viscera</p> Signup and view all the answers

    What feature is highlighted in an abdominal radiograph indicating the presence of a NG tube?

    <p>Radiodense line</p> Signup and view all the answers

    What is a primary disadvantage of bedside chest radiographs in acutely ill patients?

    <p>They give a two-dimensional representation of organs.</p> Signup and view all the answers

    Which condition is NOT accurately diagnosed using a bedside chest radiograph?

    <p>Aortic dissection</p> Signup and view all the answers

    What advantage does a CT scan have over bedside ultrasound in the evaluation of abdominal trauma?

    <p>CT can provide details about the bleeding organ source.</p> Signup and view all the answers

    In the context of pulmonary pathologies, what is a key advantage of bedside chest radiographs?

    <p>They allow for patient monitoring while in the ED.</p> Signup and view all the answers

    What is a potential limitation of using ultrasound to evaluate for intra-abdominal injuries?

    <p>It may not determine which organ is bleeding.</p> Signup and view all the answers

    What type of imaging is particularly useful for diagnosing pulmonary embolism?

    <p>CT scan</p> Signup and view all the answers

    In an emergency setting, what is a distinct benefit of CT scans compared to chest radiographs?

    <p>CT scans provide three-dimensional imaging.</p> Signup and view all the answers

    Why is a focused ultrasound exam valuable in cases of suspected intra-abdominal organ injury after trauma?

    <p>It involves no radiation exposure.</p> Signup and view all the answers

    Study Notes

    Instructional Methods

    • Team-Based Learning (TBL) is the primary instructional method for the session.
    • A flipped session format is utilized along with clinical correlation.
    • Written or visual media resources are recommended for learning.

    Learning Objectives

    • Explain advantages of Chest Radiograph (CXR) in emergency settings over CT scan.
    • Understand basics of reading a CXR and identifying critical anatomical markers.
    • Identify conditions where CT scans are superior to CXR.
    • Recognize major abdominal organs on abdominal X-rays.
    • Identify the liver, spleen, pancreas, kidney, stomach, and colon on abdominal CT scans with contrast.
    • Discuss the pros and cons of Ultrasound versus CT in assessing abdominal trauma.

    Radiography and CT Overview

    • Approximately 80 million chest radiographs are performed annually in the US.
    • Chest X-rays are favored for their cost-effectiveness, low radiation dose, and ease of use.
    • X-ray imaging relies on differences in tissue density to create images.
    • CT scans provide higher spatial resolution and more detailed images than traditional radiographs but involve higher radiation exposure and cost.

    Chest Radiography Anatomy

    • Chest X-rays visualize thoracic structures including trachea, bronchi, lungs, heart, aorta, and ribs.
    • Opacity principles: bone appears white (opaque), air appears black (lucent), and lungs appear darker due to air-filled spaces.

    Uses of Chest Radiography

    • In acute contexts, CXRs are used to identify rib fractures, pneumothorax, pneumonia, and pleural effusions.
    • In non-emergent settings, used for preoperative evaluations and chronic cough assessments.

    Chest Computed Tomography (CT) Details

    • CT scans can utilize intravenous iodinated contrast for enhanced visibility of vascular conditions.
    • CT images provide detailed views of the tracheobronchial tree, mediastinal lesions, and cardiovascular structures.

    Uses of Chest CT

    • Acute diagnoses facilitated by CT include pulmonary embolism and aortic dissection.
    • Non-emergent uses include lung cancer screening; CT detects smaller lung tumors compared to CXR, aiding in early diagnosis and improved survival rates.

    Abdominal Radiographs

    • Key anatomical structures visible include liver, bowel loops, kidneys, and pelvic bones.
    • Abdominal radiographs lack detail for soft tissue organs; other imaging modalities like Ultrasound or CT are preferred for abdominal pathologies.

    Abdominal Radiograph Uses

    • Useful in diagnosing pneumoperitoneum, renal stones, and bowel obstructions.
    • Radiographs display lucent gas-filled structures against opaque solid organs like the liver.

    Abdominal CT Advantages

    • CT provides a comprehensive view of all abdominal organs and details specific injuries in trauma settings.
    • Abdominal CT is more informative than X-rays or Ultrasound for assessing intra-abdominal injuries.

    Bedside X-ray Evaluation

    • Bedside CXRs are common in acute care for their ease and lower radiation risk.
    • CXRs are effective for evaluating conditions such as pneumonia and pneumothorax but provide limited 2D information.
    • CT, despite higher radiation, accurately diagnoses numerous acute diseases not well-evaluated by radiographs.

    Ultrasound in Emergency Setting

    • Focused Ultrasound (FAST) helps assess hemoperitoneum quickly at the bedside without radiation.
    • While Ultrasound indicates the presence of fluid, CT provides greater details regarding the injury and active bleeding for treatment guidance.

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    Quiz Team

    Description

    Test your knowledge on the foundational concepts of Imaging 1. This quiz will cover essential topics taught in the session led by Dr. William Rappaport and Dr. Stephane Chartier. Prepare yourself for team-based learning activities and consolidate your understanding.

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