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Questions and Answers
Questions and Answers
What is the primary advantage of using F-18 fluorodeoxyglucose (FDG) in positron emission tomography (PET) compared to Single-photon emission computed tomography (SPECT)?
What is the primary advantage of using F-18 fluorodeoxyglucose (FDG) in positron emission tomography (PET) compared to Single-photon emission computed tomography (SPECT)?
- Better anatomical localization
- Reduced scan time
- Higher contrast and spatial resolution (correct)
- Lower radiation exposure
In PET-CT imaging for cancer detection, what is the main reason for combining PET with CT?
In PET-CT imaging for cancer detection, what is the main reason for combining PET with CT?
- To speed up the scanning process
- To improve anatomical localization and provide detailed metabolic information (correct)
- To reduce patient discomfort
- To decrease radiation exposure
How does Single-photon emission computed tomography (SPECT) differ from Positron emission tomography (PET) in terms of the radioisotopes used?
How does Single-photon emission computed tomography (SPECT) differ from Positron emission tomography (PET) in terms of the radioisotopes used?
- PET uses gamma-emitting radioisotopes (correct)
- PET uses tracers like technetium-99m
- SPECT uses tracers with better contrast and resolution
- SPECT uses positron-emitting radioisotopes
For normal tissue and organ mapping in PET-CT, what advantage does Single-photon emission computed tomography (SPECT) have over Positron emission tomography (PET)?
For normal tissue and organ mapping in PET-CT, what advantage does Single-photon emission computed tomography (SPECT) have over Positron emission tomography (PET)?
In the context of PET-CT imaging, what role does attenuation correction play in the scanning process?
In the context of PET-CT imaging, what role does attenuation correction play in the scanning process?
What is the primary purpose of using PET-CT imaging in cancer detection?
What is the primary purpose of using PET-CT imaging in cancer detection?
How can PET-CT imaging be used to stage cancer?
How can PET-CT imaging be used to stage cancer?
What is the role of PET-CT imaging in evaluating the response to cancer treatment?
What is the role of PET-CT imaging in evaluating the response to cancer treatment?
How is a PET-CT procedure performed for cancer imaging?
How is a PET-CT procedure performed for cancer imaging?
How can PET-CT imaging be used to map normal tissues and organs in the body?
How can PET-CT imaging be used to map normal tissues and organs in the body?
What is the significance of the radioactive tracer used in PET-CT imaging?
What is the significance of the radioactive tracer used in PET-CT imaging?
What is the primary use of PET-CT imaging in cancer management?
What is the primary use of PET-CT imaging in cancer management?
How does PET-CT imaging help in staging cancer?
How does PET-CT imaging help in staging cancer?
Which radioactive material is commonly used in PET-CT imaging for cancer detection?
Which radioactive material is commonly used in PET-CT imaging for cancer detection?
What is the primary advantage of PET-CT imaging over other imaging techniques?
What is the primary advantage of PET-CT imaging over other imaging techniques?
Which of the following is NOT a common use of PET-CT imaging?
Which of the following is NOT a common use of PET-CT imaging?
How is the radioactive material administered to the patient during a PET-CT scan?
How is the radioactive material administered to the patient during a PET-CT scan?
Questions and Answers
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Flashcards
Flashcards
What is SPECT-CT Reconstruction?
What is SPECT-CT Reconstruction?
A 3D imaging reconstruction method from camera projection data, providing attenuation correction and enhanced anatomical localization.
What are SPECT and PET?
What are SPECT and PET?
Nuclear medicine imaging techniques that offer metabolic and functional information about the body.
What is Positron Emission Tomography (PET)?
What is Positron Emission Tomography (PET)?
A nuclear imaging technique that uses positron-emitting radioisotopes and provides superior contrast and spatial resolution with a ring of multiple detectors.
What is Single-Photon Emission Computed Tomography (SPECT)?
What is Single-Photon Emission Computed Tomography (SPECT)?
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What is PET-CT?
What is PET-CT?
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What are Radiotracers?
What are Radiotracers?
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What is FDG (F-18 fluorodeoxyglucose)?
What is FDG (F-18 fluorodeoxyglucose)?
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How does a PET-CT procedure work?
How does a PET-CT procedure work?
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What are the uses of PET-CT?
What are the uses of PET-CT?
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Study Notes
Study Notes
SPECT-CT Reconstruction
- Projection data from cameras is reconstructed into 3D images in axial slices
- SPECT-CT provides attenuation correction and higher resolution anatomical localization
SPECT vs PET
- SPECT and PET are nuclear medicine imaging techniques that provide metabolic and functional information
- They can be combined with CT and MRI to provide detailed anatomical and metabolic information
Positron Emission Tomography (PET)
- Uses positron-emitting radioisotope (tracer) such as F-18 fluorodeoxyglucose (FDG)
- Provides better contrast and spatial resolution compared to SPECT
- Has a ring of multiple detectors
Single-Photon Emission Computed Tomography (SPECT)
- Uses gamma-emitting radioisotope (tracer) such as technetium-99m, iodine-123, or iodine-131
- Provides poorer contrast and spatial resolution compared to PET
- Usually uses one large crystal-based detector
Positron Emission Tomography/ PET-CT
- Utilizes the advantages of both PET and CT
- Nuclear medicine uses small amounts of radioactive material called radiotracers to diagnose, evaluate, and treat various diseases
- Radiotracers accumulate in tumors or regions of inflammation and can bind to specific proteins in the body
Radiotracers
- The most common radiotracer is 2-[F-18]fluoro-2-deoxy-D-glucose (FDG), a molecule similar to glucose
- Fluorine-18 is an unstable radioisotope with a half-life of approximately 110 minutes
- Cancer cells are more metabolically active and may absorb glucose at a higher rate
PET-CT Procedure
- Ordinary x-ray exams pass x-rays through the body to create an image
- Radioactive materials (F-18 fluorodeoxyglucose) are injected intravenously, or swallowed or inhaled as a gas
- The material accumulates in the area under examination, giving off gamma rays
- Special cameras detect this energy and create pictures with the help of a computer
Uses of PET-CT
- Detect cancer and/or make a diagnosis
- Determine whether a cancer has spread in the body
- Stage cancer which potentially can be treated radically
- Establish baseline staging before commencing treatment
- Determine if a cancer has returned after treatment
- Evaluate prognosis
- Assess tissue metabolism and viability
- Map normal human brain and heart function
- Assess response to therapy
- Evaluate suspected disease recurrence, relapse, and/or residual disease
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