27 Questions
Which medical imaging technique relies upon the emission and detection of highly penetrating gamma (γ) rays?
Single Photon Emission Computer Tomography (SPECT)
Which type of radiation is used in PET/SPECT imaging?
Gamma radiation (γ emission)
What is a key characteristic of PET/SPECT imaging compared to MRI?
High spatial resolution
Which type of radiation has low penetration and is stopped by paper and clothing?
Alpha radiation (He nuclei)
What is the main advantage of using gamma rays for medical imaging?
Readily detected in the body tissues
Which method has the best sensitivity among MRI, SPECT, and PET?
PET
What is the primary method for stopping beta radiation?
Thin metal foil
Which type of radiation is useful for imaging purposes due to its moderate penetration and body tissue transparency?
Gamma radiation
What is the typical PET imaging dose for a human using 18F-FDG?
350 MBq
What limits the resolution of SPECT and PET imaging techniques?
The mean free path of beta radiation
Which radionuclide has the highest maximum beta plus energy?
$^{62}Cu$
For what purpose is FDG (18F-Fluorodeoxy glucose) primarily used?
Visualizing metabolic functions
What is the primary reason that PET and SPECT use radioactive materials that emit γ radiation?
To enhance the penetration of the radiation through body tissues
Why are PET and SPECT referred to as TRACER methods?
Because they utilize pharmacologically insignificant amounts of materials
Which medical imaging technique has the poorest spatial resolution among MRI, SPECT, and PET?
SPECT
What is the main advantage of using gamma rays for medical imaging?
They can penetrate body tissues while being readily detected
What is the typical sensitivity order from highest to lowest among MRI, SPECT, and PET imaging techniques?
SPECT, PET, MRI
What is the primary purpose of using radioactive materials in PET and SPECT imaging?
To ensure that the emitted radiation can penetrate body tissues
What is the typical imaging dose of 18F-FDG for a mouse?
10 MBq
What does SPECT stand for in the context of medical imaging?
Single Photon Emission Computerized Tomography
Which radionuclide has the highest maximum beta plus energy?
$^{66}Ga$
What limits the resolution of PET imaging techniques?
Maximum beta plus energy
What is the primary function of 18F-Fluorodeoxy glucose (FDG) in functional imaging?
To visualize metabolic functions
What is the mode of action of 18F-FDG in mimicking glucose?
It accumulates by a metabolic process
What does PET stand for in the context of medical imaging?
$eta^+$ Particle Emission Tomography
Which type of radiation is used in SPECT and PET imaging?
$eta^+$ radiation
What is the primary method for stopping gamma radiation?
$1 ext{ cm - } 1 ext{ m }$ of concrete or lead
Test your knowledge of PET and SPECT imaging techniques used in biomedical imaging with this quiz. Explore the principles of emission and detection of gamma rays, as well as the use of tracer methods in medical imaging.
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