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Everything you need to know about Computed Tomography (CT) & CT Scanning


These post-test questions are designated for attendees who have already watched all the lectures and wish to obtain CME credits through Johns Hopkins CME office.

  1. Patients with heart failure may have artifacts that mimic pulmonary emboli because:
    1. Pulmonary interstitial congestion obscures the pulmonary artery visualization
    2. Poor breathholding results in motion artifacts
    3. Mixing artifacts due to poor cardiac output can simulate filling defects
    4. Low level enhancement of the pulmonary arteries results in significant image noise
  1. Atrial septal aneurysms are:
    1. Prone to development of thrombus and are usually treated if >20 mm
    2. Frequently seen by CT and uncommonly seen by echocardiography
    3. Usually secondary to infection
    4. Incidentally encountered abnormalities that usually do not require follow-up
  1. Perigraft fluid in the post-operative state:
    1. Should be followed if >2 cm in thickness
    2. Is a normal finding if shrinking over time
    3. Tends to grow slowly
    4. When present indicates infection
  1. Surgical material from graft repair of the aorta:
    1. Is hypoattenuating on CT
    2. Is high signal on MRI
    3. Is hyperattenuating on CT
    4. Usually enhances
  1. What is the most likely diagnosis?
         
    1. Pancreatic ductal adenocarcinoma
    2. Chronic pancreatitis
    3. Autoimmune pancreatitis
    4. Normal
  1. Which of these statements about autoimmune pancreatitis is true?
    1. Normal serum IgG4 excludes diagnosis
    2. Diffuse hyperdense halo is typical
    3. Diffuse parenchymal calcifications are present
    4. Most patients respond to steroids
  1. What is the most likely diagnosis?
         
    1. Cholangiocarcinoma
    2. Hepatocellular carcinoma
    3. Metastatic disease
    4. Hypercoagulable state
  1. Calcifications are usually seen in which of these masses?
    1. Hemangioma
    2. Focal nodular hyperplasia
    3. Abscess
    4. Metastases from mucinous colon cancer
  1. What is the most common form of necrotizing pancreatitis:
    1. Pancreatic parenchymal and associated peripancreatic necrosis
    2. Peripancreatic necrosis alone
    3. Pancreatic parenchymal necrosis alone
    4. Pancreatitis presenting with walled-off necrosis
  1. 60-year-old man with acute pancreatitis. 
    AB
    Image A was acquired at the time of presentation and image B at 7 weeks later for persistent abdominal pain. The correct term for the complication in image B:
    1. Necrotizing pancreatitis
    2. Walled-off necrosis
    3. Pseudocyst
    4. Acute peripancreatic fluid collection
  1. In the National Lung Screening Trial (NLST), what was the reduction in lung cancer mortality in the computed tomography (CT) group compared to the control group?
    1. 10%
    2. 20%
    3. 30%
  1. Which of the following modality is used for lung cancer screening?
    1. High-resolution chest CT
    2. Conventional-dose chest CT with contrast
    3. Low-dose chest CT without contrast
  1. A growing 1 cm solid nodule was detected on a recent screening chest CT. Which of the following is the most appropriate next test for the patient?
    1. FDG-PET/CT
    2. Follow-up CT in 3 months
    3. MRI chest without and with IV contrast
  1. The most common extrapancreatic involvement of AIP involves which of the following organs:
    1. Kidneys
    2. Biliary tree
    3. Small bowel
    4. Thyroid
  1. Type 1 AIP is usually seen in younger patients compared to type 2 AIP.
    1. True
    2. False
  1. The ADC values of AIP tend to be lower than that of PDAC?
    1. True
    2. False
  1. CT shows peribronchovascular reticular opacities with traction bronchiectasis and subpleural sparing. Mosaic attenuation and honeycombing are absent. What is the most likely pattern?
    1. Chronic hypersensitivity pneumonitis 
    2. Lymphocytic interstitial pneumonia
    3. Nonspecific interstitial pneumonia
    4. Usual interstitial pneumonia
  1. The "straight-edge" sign, "exuberant honeycombing" sign, and "anterior upper lobe" sign are most commonly found in which of the following diseases?
    1. Asbestosis
    2. Connective tissue disease-associated interstitial lung disease
    3. Cryptogenic organizing pneumonia
    4. Sarcoidosis
  1. CT shows an avidly-enhancing endobronchial mass. What is the most likely diagnosis?
    1. Adenoid cystic carcinoma
    2. Carcinoid
    3. Hamartoma
    4. Mucoepidermoid carcinoma
  1. Which of the following is most likely associated with bronchiectasis?
    1. Allergic bronchopulmonary aspergillosis
    2. Bronchial asthma
    3. Tracheobronchial amyloidosis
    4. Relapsing polychondritis
  1. Most renal masses under 1 cm in size are?
    1. Malignant
    2. Need to be resected unless a classic cyst
    3. Angiomyolipomas
    4. Can be followed conservatively even if not definitely a simple cyst
  1. CT can be used to distinguish clear cell renal cell carcinoma from papillary renal cell carcinoma is over 90% of cases based on
    1. Lesion size
    2. Enhancement of the mass on arterial phase imaging (HU)
    3. Enhancement on excretory phase imaging (HU)
    4. Presence of calcification
  1. Positive oral contrast is no longer needed in the ER setting.
    1. True
    2. False
  1. Faster injection rates (i.e. 5cc/sec) are the main cause of contrast extravasation.
    1. True
    2. False
  1. Which of the following tumors is most common in the duodenum?
    1. Adenocarcinoma
    2. Lymphoma
    3. Carcinoid tumor
    4. GIST
  1. B-cell lymphoma is the most common type of small bowel lymphoma in the US.
    1. True
    2. False
© 1999-2021 Elliot K. Fishman, MD, FACR. All rights reserved.