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Related Concept Videos

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...
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 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...
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...

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Related Experiment Video

Updated: Jun 12, 2026

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
04:40

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans

Published on: August 28, 2018

Subcarinal air cysts: multidetector computed tomographic findings.

Yasuji Oshiro1, Sadayuki Murayama

  • 1Department of Radiology, Okinawa National Hospital, National Hospital Organization, Okinawa, Japan. oshiro4211@yahoo.co.jp

Journal of Computer Assisted Tomography
|May 26, 2010
PubMed
Summary

Subcarinal air cysts, often linked to bronchial diverticula, have distinct computed tomographic (CT) features. These findings help differentiate them from pathological conditions like pneumomediastinum.

Related Experiment Videos

Last Updated: Jun 12, 2026

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
04:40

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans

Published on: August 28, 2018

Area of Science:

  • Radiology
  • Thoracic Imaging
  • Pulmonary Medicine

Background:

  • Subcarinal air cysts are rare findings.
  • Their relationship with bronchial diverticula is not well-established.
  • Distinguishing these cysts from other mediastinal lesions can be challenging.

Purpose of the Study:

  • To evaluate the computed tomographic (CT) characteristics of subcarinal air cysts.
  • To explore the potential association between subcarinal air cysts and bronchial diverticula.
  • To aid in the differentiation of subcarinal air cysts from pathological mediastinal conditions.

Main Methods:

  • Retrospective review of seven patients with subcarinal air cysts.
  • Detailed assessment of cyst location, size, and margins on CT.
  • Evaluation of cyst-bronchial communication, presence of other bronchial diverticula, pulmonary lesions, and interval changes on follow-up CT.

Main Results:

  • Subcarinal air cysts were located inferior or inferoposterior to the carina.
  • Typical features included lobulated margins and duct-like communications with bronchi.
  • Larger cysts were often multiloculated, with communications arising from the posterior-inferior aspect of main bronchi.

Conclusions:

  • Subcarinal air cysts can be considered within a spectrum including bronchial diverticula and paratracheal air cysts.
  • Their predictable location and CT appearance facilitate differentiation from pathologies like pneumomediastinum.
  • CT imaging is crucial for characterizing these benign findings.