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Positron Emission Tomography

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 Scan

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...

Sensitivity, Specificity, and Predicted Value

Sensitivity, Specificity, and Predicted Value

In healthcare diagnostics, laboratory tests play a crucial role in identifying and diagnosing a wide range of medical conditions. However, interpreting test results is not always straightforward. An abnormal test result does not always confirm the presence of a disease, just as a normal result does not guarantee its absence. To assess the reliability of these diagnostic tools, healthcare practitioners rely on two key statistical indicators: sensitivity and specificity.
Sensitivity is the...

Pulmonary Function Tests

Pulmonary Function Tests

Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...

Imaging Studies II: Positron Emission Tomography and Scintigraphy

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

Pneumonia III: Complications and Assessment

Pneumonia III: Complications and Assessment

Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:

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Related Experiment Video

Updated: May 31, 2026

A New Technique for Treating Low-risk Prostate Cancer—Super Active Surveillance

A New Technique for Treating Low-risk Prostate Cancer—Super Active Surveillance

Published on: November 7, 2025

Patient information - what is a PSA test?

¹The University of Notre Dame Australia, Australia.

Australian Family Physician

|July 12, 2011

Summary

This summary is machine-generated.

The prostate specific antigen (PSA) test is a valuable tool for detecting prostate cancer. It aids in screening, monitoring disease progression, and diagnosing prostate conditions.

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Last Updated: May 31, 2026

A New Technique for Treating Low-risk Prostate Cancer—Super Active Surveillance

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Measuring Psoriasis Severity at Home

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Published on: March 1, 2024

Area of Science:

Biochemistry
Oncology

Context:

Prostate cancer is a significant health concern globally.
Early detection improves patient outcomes.

Purpose:

To evaluate the utility of the prostate specific antigen (PSA) test.
To understand PSA's role in prostate cancer management.

Summary:

Prostate specific antigen (PSA) is a protein synthesized by the prostate gland.
The PSA test measures PSA levels in the blood.
Elevated PSA can indicate prostate issues, including cancer.

Impact:

The PSA test is crucial for prostate cancer screening and diagnosis.
It assists in monitoring treatment effectiveness and disease recurrence.