Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Physical Assessment of the Respiratory Tract II: Palpation

Physical Assessment of the Respiratory Tract II: Palpation

Physical assessment of the respiratory tract is critical in identifying potential health issues. One key component of this assessment is palpation, a technique healthcare providers use to assess the body for abnormalities. This content explores the method of palpation in evaluating the respiratory tract, focusing on thoracic palpation and tactile fremitus.
Thoracic Palpation
Thoracic palpation detects tenderness, masses, lesions, respiratory excursions, and vocal fremitus. The nurse assesses...

Pleural Effusion I: Introduction

Pleural Effusion I: Introduction

Pleural effusion is an abnormal fluid accumulation in the pleural cavity, a narrow space between the lungs and the chest wall. It is not a disease per se but rather a symptom or indication of an underlying disease. In normal circumstances, this space contains a small amount of fluid (5 to 15 mL), a lubricant facilitating the non-frictional movement of the pleural surfaces.
There are two main types of pleural effusion: transudative and exudative. They are differentiated using Light's criteria,...

Pleural Effusion II: Symptoms and Management

Pleural Effusion II: Symptoms and Management

Pleural Effusion Overview
A pleural effusion is the abnormal collection of fluid between the parietal and visceral pleura layers of tissue that form the lining of the lungs and chest cavity. It can occur independently or due to surrounding parenchymal diseases, such as infection, malignancy, or inflammatory conditions.
Clinical Manifestations:

Radiological Investigation II: MRI and Ventilation Perfusion Scan

Radiological Investigation II: MRI and Ventilation Perfusion Scan

Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...

Pneumothorax II: Pathophysiology

Pneumothorax II: Pathophysiology

Pneumothorax means the presence of air in the pleural space — the thin potential gap between the visceral and parietal pleura. This condition disrupts the normal pressure balance that keeps the lungs inflated, leading to partial or complete collapse of the affected lung.Normal physiologyUnder normal conditions, the pleural space maintains a slightly negative intrapleural pressure, which keeps the lungs expanded against the chest wall. This negative pressure creates a delicate balance between...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Transarterial chemoembolisation with irinotecan (irinotecan-TACE) as salvage or post-inductive therapy for colorectal cancer liver metastases: effectiveness results from the CIREL study.

ESMO open·2025

Same author

Transarterial Radioembolisation with Y90 Resin Microspheres and the Effect of Reimbursement Criteria in France: Final Results of the CIRT-FR Prospective Observational Study.

Cardiovascular and interventional radiology·2025

Same author

Left atrial appendage volume is an independent predictor of atrial arrhythmia recurrence following cryoballoon pulmonary vein isolation in persistent atrial fibrillation.

Frontiers in cardiovascular medicine·2023

Same author

[Luminal diagnostics].

Radiologie (Heidelberg, Germany)·2023

Same author

Zeitschrift fur Gastroenterologie·2022

Same author

Zeitschrift fur Gastroenterologie·2022

Search research articles

Related Experiment Video

Updated: Jul 24, 2026

Point-of-Care Lung Ultrasound in Adults: Image Acquisition

Point-of-Care Lung Ultrasound in Adults: Image Acquisition

Published on: March 3, 2023

New formula for quantification of pleural effusions from computed tomography.

P J Mergo¹, T Helmberger, J Didovic

¹Department of Radiology, University of Florida College of Medicine, Gainesville 32610, USA.

Journal of Thoracic Imaging

|April 21, 1999

Summary

A new formula using computed tomography (CT) measurements accurately estimates pleural effusion volume. This method, using simple depth and length measurements, offers a reliable alternative to visual estimation, which tends to overestimate effusion size.

More Related Videos

Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment

Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment

Published on: August 9, 2024

Three-Dimensional Phase Resolved Functional Lung Magnetic Resonance Imaging

Three-Dimensional Phase Resolved Functional Lung Magnetic Resonance Imaging

Published on: June 21, 2024

Related Experiment Videos

Last Updated: Jul 24, 2026

Point-of-Care Lung Ultrasound in Adults: Image Acquisition

Point-of-Care Lung Ultrasound in Adults: Image Acquisition

Published on: March 3, 2023

Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment

Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment

Published on: August 9, 2024

Three-Dimensional Phase Resolved Functional Lung Magnetic Resonance Imaging

Three-Dimensional Phase Resolved Functional Lung Magnetic Resonance Imaging

Published on: June 21, 2024

Area of Science:

Radiology
Medical Imaging
Thoracic Medicine

Background:

Pleural effusions are common clinical findings.
Accurate volume estimation is crucial for diagnosis and treatment.
Current methods like visual inspection have limitations.

Purpose of the Study:

To develop and validate a simple, accurate method for estimating pleural effusion volume using computed tomography (CT).
To compare a formula-based CT measurement technique with visual estimation and 3D reconstruction volumes.

Main Methods:

Retrospective analysis of helical CT scans from 15 patients with pleural effusions.
Volume estimation using 3D reconstructions as a reference standard.
Calculation of effusion volumes using the formula: d² x l (depth x length).
Comparison of formula-based estimates and visual estimates against 3D reconstruction volumes.

Main Results:

The formula d² x l showed high correlation coefficients with calculated volumes (0.908 for right, 0.849 for left).
Excluding loculated effusions, correlations improved (0.969 right, 0.949 left).
Visual estimation correlated well but consistently overestimated volumes by 300-500 ml.

Conclusions:

The formula d² x l provides an accurate and easily applicable method for estimating pleural effusion volume from routine CT scans.
This CT-based formula offers a more reliable quantitative assessment compared to visual inspection.
The method facilitates straightforward volume measurement from two simple dimensions on CT images.