CT scans MCQs

What does CT stand for in medical imaging?
- a) Computed Tomography
- b) Computerized Treatment
- c) Computed Technology
- d) Conventional Tomography
  Answer: a) Computed Tomography
What type of imaging technique does a CT scan utilize?
- a) Ultrasound waves
- b) Magnetic fields
- c) X-rays
- d) Gamma rays
  Answer: c) X-rays
Which of the following is a primary advantage of CT scans over traditional X-rays?
- a) Lower radiation exposure
- b) Ability to create 3D images
- c) Faster procedure time
- d) No need for contrast agents
  Answer: b) Ability to create 3D images
In which situation is a CT scan typically preferred over an MRI?
- a) Evaluating soft tissue structures
- b) Assessing bone fractures
- c) Detecting brain tumors
- d) Imaging the spine
  Answer: b) Assessing bone fractures
What is the typical radiation dose of a CT scan compared to a standard chest X-ray?
- a) Lower
- b) Similar
- c) Higher
- d) Negligible
  Answer: c) Higher
What is the purpose of using contrast agents in CT scans?
- a) To reduce patient discomfort
- b) To enhance the visibility of blood vessels and organs
- c) To lower radiation exposure
- d) To increase the scan speed
  Answer: b) To enhance the visibility of blood vessels and organs
Which of the following is a common contraindication for the use of iodinated contrast in CT scans?
- a) Allergies to shellfish
- b) History of asthma
- c) Pregnancy
- d) All of the above
  Answer: d) All of the above
How long does a typical CT scan take?
- a) 5–10 minutes
- b) 15–30 minutes
- c) 30–60 minutes
- d) Over an hour
  Answer: a) 5–10 minutes
Which body part is commonly imaged using CT scans?
- a) Abdomen
- b) Chest
- c) Head
- d) All of the above
  Answer: d) All of the above
What does a “slice” refer to in a CT scan?
- a) The amount of radiation used
- b) A single image or cross-section of the body
- c) The time taken for the scan
- d) The thickness of the contrast agent
  Answer: b) A single image or cross-section of the body
What type of detector is commonly used in modern CT scanners?
- a) Photographic film
- b) Solid-state detectors
- c) Chemical film
- d) Fluoroscopic detectors
  Answer: b) Solid-state detectors
What is the primary purpose of a CT angiography?
- a) To visualize tumors
- b) To assess blood vessels
- c) To examine bone structure
- d) To evaluate lung function
  Answer: b) To assess blood vessels
What patient preparation is typically required before a CT scan?
- a) NPO for 24 hours
- b) Drinking plenty of fluids
- c) Removing all metal objects
- d) Wearing a hospital gown
  Answer: c) Removing all metal objects
Which imaging modality would you use to assess a suspected stroke quickly?
- a) MRI
- b) CT scan
- c) Ultrasound
- d) X-ray
  Answer: b) CT scan
What type of CT scan provides real-time images of blood flow?
- a) Spiral CT
- b) Dual-energy CT
- c) CT angiography
- d) Positron emission tomography (PET)
  Answer: c) CT angiography
What is a common side effect of intravenous contrast media during a CT scan?
- a) Fever
- b) Metallic taste in the mouth
- c) Hair loss
- d) Joint pain
  Answer: b) Metallic taste in the mouth
Which of the following is NOT an advantage of CT scans?
- a) Rapid imaging
- b) High radiation exposure
- c) Detailed cross-sectional images
- d) Wide availability
  Answer: b) High radiation exposure
What is the main reason for the use of CT scans in trauma cases?
- a) Cost-effectiveness
- b) Speed and accuracy in detecting injuries
- c) Low radiation dose
- d) Lack of contrast requirements
  Answer: b) Speed and accuracy in detecting injuries
What does the term “helical” refer to in helical CT scans?
- a) The shape of the scanner
- b) The movement of the patient
- c) The continuous rotation of the X-ray source
- d) The thickness of the slices
  Answer: c) The continuous rotation of the X-ray source
What is a major disadvantage of CT scans compared to MRI?
- a) Longer imaging times
- b) Higher cost
- c) Exposure to ionizing radiation
- d) Limited availability
  Answer: c) Exposure to ionizing radiation
Which condition is commonly diagnosed using a CT scan of the abdomen?
- a) Appendicitis
- b) Asthma
- c) Heart disease
- d) Osteoporosis
  Answer: a) Appendicitis
What is the purpose of CT perfusion imaging?
- a) To assess lung capacity
- b) To evaluate blood flow to tissues
- c) To measure organ size
- d) To visualize bone density
  Answer: b) To evaluate blood flow to tissues
In a CT scan, what does the Hounsfield scale measure?
- a) Tissue density
- b) Contrast concentration
- c) Radiation exposure
- d) Scan duration
  Answer: a) Tissue density
Which of the following techniques improves the quality of CT images?
- a) Increased patient movement
- b) Use of lower radiation doses
- c) Image reconstruction algorithms
- d) Non-compliance with patient preparation
  Answer: c) Image reconstruction algorithms
What is the main use of a CT scan in cancer diagnosis?
- a) To perform biopsies
- b) To identify tumor location and size
- c) To monitor vital signs
- d) To provide treatment
  Answer: b) To identify tumor location and size
Which part of the body is least commonly scanned with CT?
- a) Brain
- b) Chest
- c) Extremities
- d) Abdomen
  Answer: c) Extremities
What is the ideal patient position for a standard CT scan?
- a) Prone
- b) Supine
- c) Sitting
- d) Standing
  Answer: b) Supine
What is a potential long-term risk of repeated exposure to CT scans?
- a) Improved imaging accuracy
- b) Increased risk of cancer
- c) Enhanced tissue healing
- d) Decreased muscle mass
  Answer: b) Increased risk of cancer
How do CT scans assist in planning surgical procedures?
- a) By providing anatomical details
- b) By replacing the need for surgery
- c) By evaluating blood flow
- d) By diagnosing infections
  Answer: a) By providing anatomical details
Which of the following is a common indication for a chest CT scan?
- a) Abdominal pain
- b) Headaches
- c) Suspected pulmonary embolism
- d) Joint swelling
  Answer: c) Suspected pulmonary embolism

Leave a Comment Cancel reply