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Related Concept Videos

Quality Assurance01:19

Quality Assurance

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Quality assurance is the overarching term used to describe the activities employed to ensure the proper performance of a system. These activities can be classified into three categories: quality control, quality assessment, and internal corrective measures. Typically, these activities work cyclically: quality control is performed before and during the analysis, while quality assessment occurs during and after the investigation. Internal corrective measures are implemented based on the findings...
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Quality Control01:05

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Quality control is one of the three cyclical quality assurance activities that help keep a system under statistical control. Typical quality control activities include creating quality control charts, conducting proficiency testing, and documenting and archiving results.
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Radiological Investigation I: X-ray and CT01:30

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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...
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Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

Radiological Investigation III: Pulmonary Angiogram and PET Scan

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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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Positron Emission Tomography01:29

Positron Emission Tomography

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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.
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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

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Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
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MO-D-BRB-02: The Radiological Physics Center's Quality Audit Program: Where Can We Improve?

D Followill1, J Lowenstein1, A Molineu1

  • 1UT MD Anderson Cancer Center, Houston, TX.

Medical Physics
|May 19, 2017
PubMed
Summary
This summary is machine-generated.

The Radiological Physics Center

Keywords:
CalibrationCancerDosimetryField sizeIonization chambersMedical treatment planningQuality assuranceThermoluminescent dosimeters

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Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Quality Assurance

Background:

  • The Radiological Physics Center (RPC) has a 44-year history of Quality Assurance (QA) for NCI-sponsored clinical trials.
  • Ensuring accurate dosimetry is critical for effective cancer treatment and patient safety.

Purpose of the Study:

  • To analyze the findings from RPC's QA audits of participating institutions.
  • To identify common dosimetry discrepancies and evaluate the effectiveness of QA protocols.

Main Methods:

  • On-site dosimetry reviews, including machine measurements and personnel interviews.
  • Remote audits using mailed dosimeters (OSLD/TLD), data comparisons, and phantom verifications.
  • Evaluation of treatment planning algorithms and institutional QA procedures.

Main Results:

  • Frequent recommendations concern TG-40 QA tests, wedge factors, and small/off-axis field outputs.
  • Ion chamber beam calibrations meeting criteria have returned to pre-TG-51 levels.
  • While few beams exceed OSLD/TLD criteria (~3%), discrepancies affect a significant percentage of institutions (12-20%).
  • Anthropomorphic phantom passing rates are improving, with prostate phantoms having the highest success rate.

Conclusions:

  • RPC's QA program continues to identify and help resolve numerous dosimetry errors.
  • The RPC plays a vital role in maintaining high-quality dosimetry standards in NCI-sponsored trials.