HRCT 50 MCQs For Govt Exam Practice : SSC, UPSC, AIIMS
High-Resolution Computed Tomography (HRCT) :
1. What does HRCT stand for?
a) High-Resolution Cardiovascular Testing
b) High-Resolution Computerized Tomography
c) High-Range Contrast Tomography
d) High-Risk CT Scan
Answer: b) High-Resolution Computerized Tomography
2. Which of the following imaging modalities provides detailed images of lung tissue?
a) MRI
b) X-ray
c) HRCT
d) Ultrasound
Answer: c) HRCT
3. HRCT is primarily used for:
a) Identifying fractures in bones
b) Assessing brain tumors
c) Evaluating lung conditions
d) Examining abdominal organs
Answer: c) Evaluating lung conditions
4. What distinguishes HRCT from conventional CT scans?
a) Higher radiation exposure
b) Lower image resolution
c) Improved spatial resolution and decreased radiation dose
d) Longer scanning time
Answer: c) Improved spatial resolution and decreased radiation dose
5. Which of the following lung conditions is commonly diagnosed using HRCT?
a) Hypertension
b) Asthma
c) Chronic obstructive pulmonary disease (COPD)
d) Diabetes
Answer: c) Chronic obstructive pulmonary disease (COPD)
6. What does HRCT imaging primarily focus on?
a) Bones
b) Soft tissues
c) Blood vessels
d) Lung parenchyma
Answer: d) Lung parenchyma
7. Which of the following is a common indication for performing an HRCT of the chest?
a) Cardiac arrhythmias
b) Head trauma
c) Suspected pulmonary fibrosis
d) Digestive disorders
Answer: c) Suspected pulmonary fibrosis
8. What is the main advantage of HRCT in diagnosing lung diseases compared to conventional chest X-rays?
a) Higher cost-effectiveness
b) Faster image acquisition
c) Better visualization of lung anatomy
d) Lower sensitivity to abnormalities
Answer: c) Better visualization of lung anatomy
9. HRCT is particularly useful in distinguishing between:
a) Bone fractures
b) Lung nodules
c) Cardiac anomalies
d) Liver cysts
Answer: b) Lung nodules
10. Which of the following lung diseases often showcases honeycombing patterns on HRCT?
a) Pulmonary embolism
b) Bronchitis
c) Tuberculosis
d) Idiopathic pulmonary fibrosis
Answer: d) Idiopathic pulmonary fibrosis
11. HRCT scans utilize which type of technology for imaging?
a) Sound waves
b) Magnetic fields
c) X-rays
d) Radioactive isotopes
Answer: c) X-rays
12. What unit is commonly used to measure radiation dose in HRCT?
a) Gy (Gray)
b) Sievert (Sv)
c) REM (Roentgen Equivalent Man)
d) mSv (millisievert)
Answer: d) mSv (millisievert)
13. Which imaging parameter in HRCT refers to the ability to differentiate between tissues of differing densities?
a) Resolution
b) Contrast
c) Frequency
d) Attenuation
Answer: b) Contrast
14. Which lung condition might present with ground-glass opacities on an HRCT scan?
a) Pneumothorax
b) Pulmonary edema
c) Lung cancer
d) Sarcoidosis
Answer: b) Pulmonary edema
15. Which factor contributes to the increased sensitivity of HRCT in diagnosing lung diseases?
a) Use of stronger magnetic fields
b) Application of intravenous contrast agents
c) Higher resolution images
d) Increased exposure to ionizing radiation
Answer: c) Higher resolution images
16. How is HRCT different from a standard chest CT scan?
a) HRCT uses a stronger magnetic field.
b) HRCT uses a higher dose of radiation.
c) HRCT offers better spatial resolution.
d) HRCT has a shorter scanning time.
Answer: c) HRCT offers better spatial resolution.
17. What role does HRCT play in the diagnosis of interstitial lung diseases (ILDs)?
a) It provides definitive diagnosis in all ILDs.
b) It is not useful for diagnosing ILDs.
c) It assists in identifying patterns suggestive of specific ILDs.
d) It only visualizes lung tumors.
Answer: c) It assists in identifying patterns suggestive of specific ILDs.
18. Which lung pathology often appears as a "crazy paving" pattern on HRCT?
a) Tuberculosis
b) Pneumonia
c) Pulmonary embolism
d) Alveolar proteinosis
Answer: b) Pneumonia
19. In HRCT imaging, what does the term "windowing" refer to?
a) Adjusting the display of image brightness and contrast
b) Modifying the scanning speed
c) Changing the imaging slice thickness
d) Enhancing the resolution of the images
Answer: a) Adjusting the display of image brightness and contrast
20. Which radiation dose reduction technique is commonly used in HRCT to minimize exposure?
a) Increased scanning time
b) Lowering the tube voltage
c) Using thicker imaging slices
d) Using larger contrast agents
Answer: b) Lowering the tube voltage
21. Which of the following is an advantage of HRCT in diagnosing lung diseases compared to conventional CT scans?
a) Lower cost
b) Shorter scan time
c) Higher sensitivity for detecting lung abnormalities
d) Lower resolution images
Answer: c) Higher sensitivity for detecting lung abnormalities
22. Which lung condition commonly presents with a tree-in-bud appearance on HRCT?
a) Pulmonary embolism
b) Bronchiolitis
c) Lung abscess
d) Pleural effusion
Answer: b) Bronchiolitis
23. What is the primary reason for using HRCT in the assessment of pulmonary nodules?
a) To measure the size accurately
b) To determine the blood supply to the nodule
c) To differentiate between benign and malignant nodules
d) To assess the location of the nodule
Answer: c) To differentiate between benign and malignant nodules
24. How does HRCT assist in the evaluation of pulmonary embolism (PE)?
a) It directly visualizes blood clots in the lung arteries.
b) It measures blood pressure changes in the lungs.
c) It identifies airway obstructions.
d) It measures lung capacity.
Answer: a) It directly visualizes blood clots in the lung arteries.
25. In HRCT imaging, what does the term "window level" refer to?
a) The display brightness of the image
b) The thickness of the imaging slices
c) The contrast enhancement applied
d) The scanner's radiation output
Answer: a) The display brightness of the image
26. Which lung condition might display a "halo sign" on an HRCT scan?
a) Lung cancer
b) Aspergillosis
c) Pleural effusion
d) Tuberculosis
Answer: b) Aspergillosis
27. What is the typical radiation dose range for an HRCT scan of the chest?
a) 1-2 mSv
b) 5-10 mSv
c) 20-30 mSv
d) 50-60 mSv
Answer: a) 1-2 mSv
28. Which lung pathology might demonstrate the "black pleura" sign on an HRCT?
a) Pneumonia
b) Mesothelioma
c) Pulmonary edema
d) Lung abscess
Answer: b) Mesothelioma
29. What imaging parameter in HRCT refers to the clarity and sharpness of the images produced?
a) Resolution
b) Attenuation
c) Contrast
d) Noise
Answer: a) Resolution
30. HRCT is particularly useful in evaluating:
a) Blood pressure
b) Lung function
c) Liver function
d) Kidney stones
Answer: b) Lung function
31. Which lung disease might showcase cystic airspaces known as "honeycomb cysts" on HRCT?
a) Tuberculosis
b) Emphysema
c) Pulmonary embolism
d) Sarcoidosis
Answer: b) Emphysema
32. What is the primary advantage of HRCT in the assessment of diffuse lung diseases?
a) It provides information on blood flow changes.
b) It allows for the measurement of lung volume.
c) It helps in identifying specific patterns of lung involvement.
d) It differentiates between various lung lobes.
Answer: c) It helps in identifying specific patterns of lung involvement.
33. HRCT plays a significant role in the evaluation of suspected:
a) Liver cirrhosis
b) Kidney stones
c) Pulmonary embolism
d) Brain tumors
Answer: c) Pulmonary embolism
34. Which imaging technique is often used to monitor the progression or response to treatment in patients with interstitial lung diseases?
a) X-ray
b) PET scan
c) MRI
d) Serial HRCT scans
Answer: d) Serial HRCT scans
35. In HRCT imaging, what does the term "collimation" refer to?
a) The range of tissue densities captured in an image
b) The alignment of the patient in the scanner
c) The thickness of the X-ray beam
d) The time taken for image reconstruction
Answer: c) The thickness of the X-ray beam
36. HRCT is particularly useful in diagnosing occupational lung diseases due to:
a) Its ability to detect bone fractures
b) Its capacity to measure heart rate variability
c) Its sensitivity to specific lung patterns related to exposure
d) Its effectiveness in evaluating brain function
Answer: c) Its sensitivity to specific lung patterns related to exposure
37. What role does HRCT play in the assessment of lung nodules compared to conventional CT scans?
a) It reduces the size of nodules for better visualization.
b) It increases the likelihood of missing small nodules.
c) It offers higher resolution and better characterization of nodules.
d) It extends the scanning time for more detailed assessment.
Answer: c) It offers higher resolution and better characterization of nodules.
38. Which lung condition might exhibit a "reversed halo sign" on an HRCT scan?
a) Tuberculosis
b) Lung cancer
c) Cryptogenic organizing pneumonia (COP)
d) Pulmonary fibrosis
Answer: c) Cryptogenic organizing pneumonia (COP)
39. HRCT is valuable in diagnosing lung conditions because it can provide:
a) Static images without any cross-sectional views
b) Detailed 3D reconstructions of lung tissue
c) Dynamic visualization of lung function
d) Enhanced assessment of spinal alignment
Answer: b) Detailed 3D reconstructions of lung tissue
40. Which imaging feature is characteristic of pulmonary alveolar microlithiasis on HRCT?
a) Diffuse ground-glass opacities
b) "Sandstorm" appearance with calcifications
c) Honeycombing pattern
d) Mosaic attenuation
Answer: b) "Sandstorm" appearance with calcifications
41. What is the primary advantage of using HRCT in pediatric patients compared to conventional CT scans?
a) Reduced radiation exposure
b) Faster image acquisition
c) Higher cost-effectiveness
d) Lower spatial resolution
Answer: a) Reduced radiation exposure
42. HRCT is commonly employed in the evaluation of suspected cases of:
a) Coronary artery disease
b) Hepatic cirrhosis
c) Musculoskeletal injuries
d) Pulmonary embolism
Answer: d) Pulmonary embolism
43. In HRCT imaging, what does the term "beam hardening" refer to?
a) Increased tissue density
b) Distortion of images due to patient movement
c) The alteration of X-ray spectrum leading to streak artifacts
d) Increased scatter radiation
Answer: c) The alteration of X-ray spectrum leading to streak artifacts
44. Which lung condition might demonstrate a "crazy paving" pattern with superimposed areas of consolidation on HRCT?
a) Pneumothorax
b) Bronchiolitis obliterans organizing pneumonia (BOOP)
c) Lung abscess
d) Pleural effusion
Answer: b) Bronchiolitis obliterans organizing pneumonia (BOOP)
45. HRCT is beneficial in evaluating suspected cases of lung cancer by:
a) Providing information on heart function
b) Measuring blood oxygen levels
c) Characterizing pulmonary nodules
d) Assessing bone mineral density
Answer: c) Characterizing pulmonary nodules
46. What is the primary disadvantage of using HRCT in certain patient populations, such as those with metallic implants?
a) Increased image distortion
b) Decreased spatial resolution
c) Artifact formation
d) Reduced radiation exposure
Answer: c) Artifact formation
47. HRCT is particularly valuable in detecting early signs of:
a) Osteoporosis
b) Lung cancer
c) Coronary artery disease
d) Muscular dystrophy
Answer: b) Lung cancer
48. Which lung pathology might showcase a "reverse halo" or atoll sign on HRCT?
a) Tuberculosis
b) Sarcoidosis
c) Pulmonary embolism
d) Cryptogenic organizing pneumonia (COP)
Answer: d) Cryptogenic organizing pneumonia (COP)
49. What is the primary advantage of using contrast enhancement in HRCT imaging?
a) Improved resolution
b) Reduced scanning time
c) Enhanced visualization of blood vessels
d) Decreased radiation dose
Answer: c) Enhanced visualization of blood vessels
50. HRCT plays a significant role in the assessment of suspected cases of:
a) Glaucoma
b) Gallstones
c) Atelectasis
d) Esophageal reflux
Answer: c) Atelectasis
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