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Related Concept Videos

Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Positron Emission Tomography01:29

Positron Emission Tomography

Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...
Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

Radiological Investigation III: Pulmonary Angiogram and PET Scan

Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...

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Continuous Blood Sampling in Small Animal Positron Emission Tomography/Computed Tomography Enables the Measurement of the Arterial Input Function
10:21

Continuous Blood Sampling in Small Animal Positron Emission Tomography/Computed Tomography Enables the Measurement of the Arterial Input Function

Published on: August 8, 2019

PET/CT imaging artifacts.

Waheeda Sureshbabu1, Osama Mawlawi

  • 1Nuclear Medicine, M.D. Anderson Cancer Center, Houston, Texas 77042, USA. w_sureshbabu@yahoo.com

Journal of Nuclear Medicine Technology
|September 8, 2005
PubMed
Summary
This summary is machine-generated.

Positron Emission Tomography/Computed Tomography (PET/CT) offers integrated imaging but can produce artifacts. Understanding these artifacts, such as those from metallic implants or motion, is crucial for accurate interpretation.

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Area of Science:

  • Medical Imaging
  • Nuclear Medicine
  • Radiology

Background:

  • PET/CT combines functional (PET) and structural (CT) imaging for improved lesion detection and localization.
  • This integrated modality enhances accuracy and patient throughput compared to dedicated PET.
  • CT data aids in attenuation correction, crucial for quantitative PET analysis.

Purpose of the Study:

  • To elucidate the fundamental principles of PET/CT imaging.
  • To detail the various artifacts encountered in PET/CT scans.
  • To equip technologists with knowledge for artifact identification and differentiation.

Main Methods:

  • Review of PET/CT imaging principles and artifact generation mechanisms.
  • Categorization of artifacts based on their causes (e.g., metallic implants, motion, contrast, truncation).
  • Description of the impact of artifacts on PET emission images and quantitative accuracy.

Main Results:

  • PET/CT provides superior fused images for lesion localization.
  • CT-based attenuation correction can introduce artifacts and quantitative errors.
  • Identified artifact sources include contrast media, metallic implants, respiratory motion, and field-of-view discrepancies.

Conclusions:

  • PET/CT is a valuable tool, but awareness of potential artifacts is essential.
  • Artifacts can mimic or obscure pathology, affecting diagnostic accuracy.
  • Technologists must understand artifact origins to ensure reliable PET/CT interpretations.