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Related Concept Videos

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...
X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and the...
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...
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
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...

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Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies
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Imaging in radiation oncology: a perspective.

Laura A Dawson1, Cynthia Ménard

  • 1Department of Radiation Oncology, Princess Margaret Hospital, University of Toronto, Toronto, Ontario, Canada. laura.dawson@rmp.uhn.on.ca

The Oncologist
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PubMed
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Integrating advanced imaging into radiation oncology improves tumor targeting and minimizes normal tissue damage. This review explores how various imaging techniques enhance cancer treatment planning and delivery, discussing future opportunities.

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Area of Science:

  • Radiation Oncology
  • Medical Imaging

Background:

  • Radiation therapy aims to maximize tumor dose while sparing normal tissues.
  • Imaging plays a crucial role in cancer diagnosis, staging, treatment planning, and targeting.

Purpose of the Study:

  • To review the integration of imaging within radiation oncology.
  • To discuss challenges and opportunities for enhancing radiation oncology practice through imaging.

Main Methods:

  • Categorization of imaging into offline and online (image-guided radiation therapy).
  • Discussion of trade-offs between imaging performance and integration in radiotherapy planning.

Main Results:

  • A wide spectrum of imaging strategies has evolved alongside radiation delivery advancements.
  • Direct image integration in planning can involve compromises in imaging performance.

Conclusions:

  • Evolving radiation delivery paradigms necessitate increasing imaging performance requirements.
  • Imaging integration offers significant opportunities to improve radiation oncology outcomes.