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Related Concept Videos

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.
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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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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...

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Related Experiment Video

Updated: May 16, 2026

PET and MRI Guided Irradiation of a Glioblastoma Rat Model Using a Micro-irradiator
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PET/CT-guided interventions: personnel radiation dose.

E Ronan Ryan1, Raymond Thornton, Constantinos T Sofocleous

  • 1Department of Radiology, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, Suite H118, New York, NY 10065, USA. ronan@ronanryan.com

Cardiovascular and Interventional Radiology
|December 12, 2012
PubMed
Summary

Radiation exposure for staff during PET/CT-guided interventions is low and comparable to fluoroscopic procedures. Procedure time and use of in-room imaging are key factors influencing operator dose.

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Area of Science:

  • Medical Imaging
  • Radiation Oncology
  • Interventional Radiology

Background:

  • Positron Emission Tomography/Computed Tomography (PET/CT) combines functional and anatomical imaging.
  • PET/CT-guided interventions are increasingly utilized for precise targeting.
  • Quantifying radiation exposure is crucial for patient and staff safety.

Purpose of the Study:

  • To quantify radiation exposure to the primary operator and staff during PET/CT-guided interventional procedures.
  • To assess the correlation between radiation dose and procedural factors.

Main Methods:

  • Prospective study of 12 patients undergoing PET/CT-guided interventions.
  • Radiation exposure measured using optically stimulated luminescence dosimeters for operator, technologist, and nurse anesthetist.
  • Correlation analysis with procedure time and in-room image guidance (CT fluoroscopy, ultrasound).

Main Results:

  • Median effective doses: 0.02 mSv (operator), 0.01 mSv (nurse anesthetist), 0.02 mSv (radiology technologist).
  • Median operator extremity dose equivalent: 0.05 mSv.
  • Radiation exposure correlated with procedure duration and use of in-room image guidance.

Conclusions:

  • Operator radiation dose from PET/CT-guided procedures is not significantly different from fluoroscopically guided procedures.
  • Procedure time is the primary determinant of operator radiation exposure.
  • Minimizing time near the patient is key to reducing radiation dose.