Principles of SPECT and PET scans MCQs

  • What does SPECT stand for?
    • A) Single Photon Emission Computed Tomography
    • B) Single Photon Emission Computed Topography
    • C) Simple Photon Emission Computed Tomography
    • D) Standardized Photon Emission Computed Tomography
  • What does PET stand for?
    • A) Positron Emission Topography
    • B) Positron Emission Tomography
    • C) Positron Emission Technology
    • D) Positron Emission Treatment
  • Which type of radiation is primarily detected in PET scans?
    • A) X-rays
    • B) Gamma rays
    • C) Beta particles
    • D) Alpha particles
  • What type of radiation is primarily detected in SPECT scans?
    • A) Gamma rays
    • B) X-rays
    • C) Beta particles
    • D) Neutrons
  • What is the main difference between SPECT and PET in terms of the radiopharmaceuticals used?
    • A) SPECT uses positron-emitting isotopes
    • B) PET uses positron-emitting isotopes, while SPECT uses gamma-emitting isotopes
    • C) Both use the same isotopes
    • D) SPECT uses only beta-emitting isotopes
  • Which of the following is a common radiotracer used in PET scans?
    • A) Iodine-131
    • B) Fluorodeoxyglucose (FDG)
    • C) Technetium-99m
    • D) Gallium-67
  • In SPECT imaging, what is the function of the gamma camera?
    • A) Detect gamma radiation emitted from the radiotracer
    • B) Produce the radiotracer
    • C) Generate X-ray images
    • D) Provide real-time imaging
  • What is the typical spatial resolution of PET scans compared to SPECT?
    • A) Higher resolution than SPECT
    • B) Lower resolution than SPECT
    • C) Equal resolution
    • D) Depends on the equipment
  • What is the primary purpose of using a collimator in SPECT imaging?
    • A) To focus incoming gamma rays
    • B) To produce higher resolution images
    • C) To eliminate scatter radiation
    • D) To enhance contrast
  • Which imaging technique is preferred for functional brain imaging?
    • A) MRI
    • B) PET
    • C) X-ray
    • D) CT
  • What is the main advantage of PET over SPECT?
    • A) Lower cost
    • B) Higher sensitivity and specificity
    • C) Simplicity of operation
    • D) Less radiation exposure
  • How are PET images typically reconstructed?
    • A) Using iterative algorithms
    • B) Using linear regression
    • C) Through manual adjustment
    • D) Using standard imaging techniques
  • What does the term “time-of-flight” refer to in PET imaging?
    • A) The duration of the scan
    • B) The measurement of the time taken for a photon to travel from the source to the detector
    • C) The time taken to inject the radiotracer
    • D) The duration for which the patient is scanned
  • What type of scans can be performed using both SPECT and PET techniques?
    • A) Structural imaging
    • B) Functional imaging
    • C) Ultrasound imaging
    • D) Contrast-enhanced imaging
  • Which of the following conditions can be diagnosed using SPECT imaging?
    • A) Fractures
    • B) Cardiac perfusion abnormalities
    • C) Soft tissue tumors
    • D) Gastrointestinal diseases
  • What is a common clinical application of PET imaging?
    • A) Evaluating joint disorders
    • B) Cancer staging and monitoring
    • C) Diagnosing fractures
    • D) Assessing lung function
  • Which of the following factors can affect the quality of SPECT images?
    • A) Patient movement
    • B) All of the above
    • C) Collimator design
    • D) Radiotracer distribution
  • What is the role of attenuation correction in PET scans?
    • A) Increase scan time
    • B) Compensate for tissue absorption of photons
    • C) Enhance image brightness
    • D) Decrease radiation exposure
  • Which imaging modality combines the strengths of both SPECT and CT?
    • A) PET
    • B) SPECT/CT
    • C) MRI
    • D) Ultrasound
  • What is the typical half-life of fluorine-18 used in PET imaging?
    • A) 2 hours
    • B) 110 minutes
    • C) 12 hours
    • D) 24 hours
  • What does a higher Standardized Uptake Value (SUV) indicate in PET imaging?
    • A) Increased metabolic activity
    • B) Decreased tissue viability
    • C) Lowered oxygen supply
    • D) Normal metabolic function
  • What kind of data does SPECT provide?
    • A) Morphological data
    • B) Functional data
    • C) Genetic data
    • D) Blood chemistry
  • Which of the following conditions can be evaluated with PET imaging?
    • A) Alzheimer’s disease
    • B) Bone fractures
    • C) Acute infections
    • D) Respiratory illnesses
  • What is a potential limitation of PET imaging?
    • A) High sensitivity
    • B) Higher cost compared to SPECT
    • C) Non-invasive
    • D) Immediate results
  • Which principle is utilized in both SPECT and PET imaging?
    • A) X-ray absorption
    • B) Detection of emitted radiation from a radiotracer
    • C) Magnetic resonance
    • D) Ultrasound reflection
  • What is the typical role of a radiopharmaceutical in PET imaging?
    • A) Improve image quality
    • B) Provide a source of radiation for imaging
    • C) Reduce scanning time
    • D) Enhance patient comfort
  • Which of the following best describes the principle of “tomography”?
    • A) Imaging of moving organs
    • B) Creating cross-sectional images
    • C) Imaging surface structures only
    • D) 3D reconstruction from 2D images
  • What advantage does SPECT have in cardiac imaging?
    • A) Higher radiation dose
    • B) Ability to visualize blood flow
    • C) Better spatial resolution
    • D) Faster scan times
  • What is the primary challenge in interpreting PET scans?
    • A) Low radiation exposure
    • B) False positives due to inflammation
    • C) High-resolution images
    • D) Lack of anatomical detail
  • What type of imaging is typically performed after a PET scan for anatomical localization?
    • A) Ultrasound
    • B) MRI
    • C) CT scan
    • D) SPECT

 

 

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