Basic CT Scan MCQs For Govt Exam Practice : SSC, UPSC, AIIMS
1. What does CT stand for in CT scan?
- A) Central Testing
- B) Computerized Tomography
- C) Critical Testing
- D) Cerebral Topography
Answer: B) Computerized Tomography
2. What is the primary principle behind CT scans?
- A) Magnetic resonance
- B) Sound waves
- C) X-ray imaging
- D) Radioactive isotopes
Answer: C) X-ray imaging
3. Which of the following is not a common use of CT scans?
- A) Detecting tumors and cancer
- B) Studying brain activity in real-time
- C) Assessing internal injuries after accidents
- D) Visualizing bone fractures
Answer: B) Studying brain activity in real-time
4. What does a CT scanner rotate around the body part being examined?
- A) Ultrasound waves
- B) X-ray emitter and detector
- C) Radioactive particles
- D) Magnetic field
Answer: B) X-ray emitter and detector
5. Which of the following is an advantage of CT scans over traditional X-rays?
- A) Less detailed imaging
- B) Lower radiation exposure
- C) Limited use in diagnosing diseases
- D) Inability to visualize soft tissues
Answer: B) Lower radiation exposure
6. What type of images do CT scans produce?
- A) 2D images
- B) 3D images
- C) Only textual data
- D) Infrared images
Answer: B) 3D images
7. Which body part is commonly examined using a sinus CT scan?
- A) Chest
- B) Abdomen
- C) Head
- D) Legs
Answer: C) Head
8. In a CT scan, what does the term "slice thickness" refer to?
- A) The sharpness of the image
- B) The size of the patient
- C) The thickness of the body section being imaged
- D) The time taken for the scan
Answer: C) The thickness of the body section being imaged
9. Which contrast agent is commonly used in CT scans to enhance visibility of certain tissues?
- A) Barium
- B) Iodine
- C) Gadolinium
- D) Nitrous oxide
Answer: B) Iodine
10. What does a CT scanner detect to create images?
- A) Heat emissions
- B) Sound waves
- C) Differences in tissue density
- D) Electrical impulses
Answer: C) Differences in tissue density
11. Which medical condition can a CT scan help diagnose by visualizing blood clots within blood vessels?
- A) Aneurysm
- B) Deep vein thrombosis (DVT)
- C) Asthma
- D) Gastritis
Answer: B) Deep vein thrombosis (DVT)
12. What is the approximate time duration for a typical CT scan procedure?
- A) 5-10 minutes
- B) 30-60 minutes
- C) 2-3 hours
- D) Varies based on the body part being scanned
Answer: A) 5-10 minutes
13. Which imaging technique utilizes ionizing radiation in the creation of images?
- A) MRI
- B) PET scan
- C) Ultrasound
- D) CT scan
Answer: D) CT scan
14. In a CT scan, what does the term "Hounsfield unit" measure?
- A) Blood pressure
- B) Radiation exposure
- C) Tissue density
- D) Temperature
Answer: C) Tissue density
15. What is the primary advantage of a CT angiogram over a traditional angiogram?
- A) Higher radiation exposure
- B) Invasive procedure
- C) Lower resolution images
- D) Non-invasive procedure
Answer: D) Non-invasive procedure
16. Which body part is commonly examined in a CT pulmonary angiogram?
- A) Lungs
- B) Liver
- C) Heart
- D) Kidneys
Answer: A) Lungs
17. What is the purpose of the CT scan in the staging of cancer?
- A) To determine the type of cancer cells
- B) To assess the size and spread of the cancer
- C) To analyze the patient's genetic makeup
- D) To provide treatment options
Answer: B) To assess the size and spread of the cancer
18. What does a CT scan use to produce detailed cross-sectional images?
- A) Gamma rays
- B) X-rays
- C) Microwaves
- D) Infrared rays
Answer: B) X-rays
19. What type of computer processes the data obtained during a CT scan to produce images?
- A) Mainframe computer
- B) Supercomputer
- C) Personal computer
- D) Quantum computer
Answer: B) Supercomputer
20. Which type of CT scan provides detailed images of blood vessels throughout the body?
- A) CT angiography
- B) CT urography
- C) CT enterography
- D) CT myelography
Answer: A) CT angiography
21. Which of the following body parts is commonly examined using a CT urogram?
- A) Brain
- B) Kidneys and bladder
- C) Spine
- D) Liver
Answer: B) Kidneys and bladder
22. What does the term "contrast-enhanced CT scan" refer to?
- A) A CT scan performed with a higher radiation dose
- B) A CT scan performed without contrast agents
- C) A CT scan performed with the use of contrast agents
- D) A CT scan performed with reduced scan time
Answer: C) A CT scan performed with the use of contrast agents
23. Which imaging modality is often used alongside CT scans to provide functional information along with anatomical details?
- A) MRI
- B) Ultrasound
- C) PET scan
- D) X-ray
Answer: C) PET scan
24. What is the primary purpose of a CT scan in trauma cases?
- A) To identify pre-existing conditions
- B) To confirm a patient's age
- C) To assess and diagnose internal injuries quickly
- D) To perform a routine check-up
Answer: C) To assess and diagnose internal injuries quickly
25. In a CT scan, which term refers to the computerized combination of multiple X-ray images to create a detailed picture?
- A) Layering
- B) Stitching
- C) Reconstruction
- D) Fusion
Answer: C) Reconstruction
26. What does a CT perfusion scan primarily evaluate?
- A) Blood flow in organs and tissues
- B) Bone density
- C) Nerve conductivity
- D) Muscle elasticity
Answer: A) Blood flow in organs and tissues
27. What is the primary advantage of a CT scan over an MRI?
- A) Higher cost
- B) Faster imaging time
- C) No need for contrast agents
- D) Better soft tissue resolution
Answer: B) Faster imaging time
28. Which patient group requires special consideration before undergoing a CT scan due to increased sensitivity to radiation?
- A) Children and pregnant women
- B) Elderly individuals
- C) Athletes
- D) Individuals with fractures
Answer: A) Children and pregnant women
29. What does the term "helical CT scan" refer to?
- A) A type of scan performed with a helical-shaped machine
- B) A scan performed without contrast agents
- C) A continuous spiral motion during the scan
- D) A scan with enhanced resolution
Answer: C) A continuous spiral motion during the scan
30. Which body part is commonly examined using a CT enterography?
- A) Heart
- B) Intestines
- C) Eyes
- D) Lungs
Answer: B) Intestines
31. What does the term "CT attenuation" measure?
- A) The speed of the CT scanner
- B) The degree to which X-rays are absorbed by different tissues
- C) The contrast agent concentration in the body
- D) The number of scans taken per second
Answer: B) The degree to which X-rays are absorbed by different tissues
32. In a CT scan, what does the term "beam hardening" refer to?
- A) The sharpening of the X-ray beam
- B) The X-ray beam losing energy as it passes through tissues
- C) The increase in contrast agent concentration
- D) The rotation speed of the scanner
Answer: B) The X-ray beam losing energy as it passes through tissues
33. Which type of CT scan is specifically used to visualize the spinal cord and surrounding structures?
- A) CT angiography
- B) CT myelography
- C) CT enterography
- D) CT urography
Answer: B) CT myelography
34. What does the term "multiplanar reconstruction" mean in the context of CT scans ?
- A) Viewing images in multiple colors
- B) Viewing images in 3D only
- C) Viewing images from different angles
- D) Viewing images without contrast agents
Answer: C) Viewing images from different angles
35. Which body part is commonly examined using a CT colonography?
- A) Liver
- B) Colon and rectum
- C) Stomach
- D) Spleen
Answer: B) Colon and rectum
36. What does the term "low-dose CT scan" refer to?
- A) A scan performed without contrast agents
- B) A scan with lower resolution
- C) A scan with reduced radiation exposure
- D) A scan with increased scan time
Answer: C) A scan with reduced radiation exposure
37. Which imaging technique often serves as an alternative to CT scans for patients with contraindications to iodinated contrast agents?
- A) MRI
- B) PET scan
- C) Ultrasound
- D) X-ray
Answer: A) MRI
38. What does the term "CT dose index (CTDI)" measure?
- A) The number of scans performed per day
- B) The radiation dose delivered during a CT scan
- C) The patient's tolerance to radiation
- D) The size of the scanner
Answer: B) The radiation dose delivered during a CT scan
39. Which body part is commonly examined using a CT myelogram?
- A) Brain
- B) Spinal cord and nerves
- C) Liver
- D) Kidneys
Answer: B) Spinal cord and nerves
40. What is the primary purpose of a CT-guided biopsy?
- A) To administer contrast agents directly into the bloodstream
- B) To perform surgery using CT scans as a guide
- C) To obtain tissue samples for analysis under CT guidance
- D) To measure the patient's blood pressure during the scan
Answer: C) To obtain tissue samples for analysis under CT guidance
41. Which of the following is a type of specialized CT scan used for examining blood vessels in the brain?
- A) Cerebral myelography
- B) Cerebral angiography
- C) Cranial perfusion CT
- D) Neurological CT
Answer: B) Cerebral angiography
42. What is the primary purpose of a CT-guided drainage procedure?
- A) To perform surgery using CT scans as a guide
- B) To drain fluid or abscesses under CT guidance
- C) To administer medication directly into the bloodstream
- D) To measure blood flow during the scan
Answer: B) To drain fluid or abscesses under CT guidance
43. Which type of CT scan is specifically used to examine the bile ducts and pancreatic ducts?
- A) CT angiography
- B) CT cholangiography
- C) CT enterography
- D) CT urography
Answer: B) CT cholangiography
44. In a CT scan, what is the function of the gantry?
- A) It controls the radiation dose
- B) It houses the X-ray tube and detectors
- C) It displays the images in real-time
- D) It regulates the contrast agent injection rate
Answer: B) It houses the X-ray tube and detectors
45. What is the primary difference between a conventional X-ray and a CT scan?
- A) CT scans produce 3D images, while X-rays produce 2D images
- B) X-rays have lower radiation exposure than CT scans
- C) CT scans take longer to perform than X-rays
- D) X-rays provide better soft tissue contrast than CT scans
Answer: A) CT scans produce 3D images, while X-rays produce 2D images
46. Which of the following is NOT a potential risk associated with CT scans?
- A) Allergic reactions to contrast agents
- B) Increased risk of developing cancer due to radiation exposure
- C) Magnetic interference
- D) Risk of kidney damage with contrast agents
Answer: C) Magnetic interference
47. Which imaging technique is commonly used for imaging fetuses in pregnant women instead of CT scans due to safety concerns?
- A) X-ray
- B) Ultrasound
- C) MRI
- D) PET scan
Answer: B) Ultrasound
48. What is the primary advantage of contrast-enhanced CT scans over non-contrast CT scans?
- A) Higher resolution images
- B) Better assessment of bone fractures
- C) Improved visualization of soft tissues and blood vessels
- D) Reduced scanning time
Answer: C) Improved visualization of soft tissues and blood vessels
49. Which body part is commonly examined using a CT myelogram?
- A) Brain
- B) Spinal cord and nerves
- C) Liver
- D) Kidneys
Answer: B) Spinal cord and nerves
50. What does the term "virtual colonoscopy" refer to in the context of CT scans?
- A) A scan performed without contrast agents
- B) A scan specifically examining the kidneys
- C) A non-invasive method to visualize the colon and rectum
- D) A high-dose CT scan for detailed imaging of the colon
Answer: C) A non-invasive method to visualize the colon and rectum
51. Which body part is commonly examined using a CT arthrogram?
- A) Joints (e.g., shoulder, knee)
- B) Heart
- C) Liver
- D) Lungs
Answer: A) Joints (e.g., shoulder, knee)
52. What is the primary purpose of a CT scan in the evaluation of stroke patients?
- A) To assess bone fractures
- B) To detect soft tissue injuries
- C) To visualize blood flow in the brain
- D) To determine the patient's blood pressure
Answer: C) To visualize blood flow in the brain
53. What is the primary purpose of a CT scan in the evaluation of abdominal pain?
- A) To measure organ size
- B) To assess blood flow
- C) To identify bone fractures
- D) To detect sources of internal pain or injury
Answer: D) To detect sources of internal pain or injury
54. Which body part is commonly examined using a CT cystogram?
- A) Kidneys
- B) Liver
- C) Urinary bladder
- D) Lungs
Answer: C) Urinary bladder
55. What does the term "dual-energy CT scan" refer to?
- A) A scan performed without contrast agents
- B) A scan using two different types of X-rays to distinguish between different materials in the body
- C) A scan performed only on specific body parts
- D) A scan with increased radiation exposure
Answer: B) A scan using two different types of X-rays to distinguish between different materials in the body
56. Which body part is commonly examined using a CT myelography?
- A) Brain
- B) Spinal cord and nerves
- C) Liver
- D) Kidneys
Answer: B) Spinal cord and nerves
57. What is the primary purpose of a CT scan in the evaluation of trauma patients?
- A) To measure organ size
- B) To assess bone density
- C) To diagnose infections
- D) To identify internal injuries and bleeding
Answer: D) To identify internal injuries and bleeding
58. What is the primary advantage of 4D CT scans in comparison to traditional CT scans?
- A) Higher radiation exposure
- B) Ability to capture images in real-time as the body moves
- C) Lower resolution images
- D) Shorter scanning time
Answer: B) Ability to capture images in real-time as the body moves
59. Which type of CT scan is used to examine the urinary tract, including the kidneys, ureters, and bladder?
- A) CT urography
- B) CT cholangiography
- C) CT cystography
- D) CT enterography
Answer: A) CT urography
60. What is the primary purpose of a CT scan in the evaluation of abdominal pain?
- A) To measure organ size
- B) To assess blood flow
- C) To identify bone fractures
- D) To detect sources of internal pain or injury
Answer: D) To detect sources of internal pain or injury
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