Variations Between Dose|Ventilation and Dose|Perfusion Metrics in ...

Variations Between Dose-Ventilation and Dose-Perfusion Metrics in ...

Correlations between the dose-ventilation and dose-perfusion metrics were strong (range, r = 0.94-0.97), whereas the agreements widely varied among patients, ...

Variations Between Dose-Ventilation and Dose-Perfusion Metrics in ...

Strong correlations were present between the dose-ventilation and dose-perfusion metrics. However, the agreement between the ...

Variations Between Dose-Ventilation and Dose-Perfusion Metrics in ...

The aim of the present study was to compare dose-ventilation metrics with dose-perfusion metrics for radiation therapy plan evaluation.

Variations Between Dose-Ventilation and Dose-Perfusion Metrics in ...

Purpose: Currently, several active clinical trials of functional lung avoidance radiation therapy using different imaging modalities for ventilation or ...

Is Perfusion Dose-Response Different Than Ventilation Dose ...

The current work employed quantitative metrics and clinical assessments to evaluate whether ventilation dose-response differs from perfusion dose-response for ...

Ventilation-perfusion ratios and V/Q mismatch - Osmosis

Alveolar ventilation (V) is the amount of air that reaches alveoli in the lungs, measured in liters/minute (L/min); and perfusion (Q) is the pulmonary blood ...

Patient Radiation Dose Metrics Used in CT and Fluoroscopy

Measuring Radiation Dose from CT Procedures. During CT ... However, there is considerable variation between cumulative air kerma and peak skin dose.

Impact of delivery variations on 3D dose distributions for volumetric ...

Delivery variations, in this context, denote variations in the delivered dose distribution arising from natural and intrinsic machine parameter ...

Multi-centre evaluation of variation in cumulative dose assessment ...

The researcher added the spatially mapped dose from Course 1 to the Course 2 dose and extracted the cumulative physical doses. Blocks with light ...

Gas exchange and ventilation–perfusion relationships in the lung

This review provides an overview of the relationship between ventilation/perfusion ratios and gas exchange in the lung, emphasising basic concepts and relating ...

Validation of CT-based ventilation and perfusion biomarkers with ...

For radiation response, direct and indirect points of interest (shown in Fig. 3) were evaluated and compared to perfusion and ventilation ...

Dynamic chest radiography: clinical validation of ventilation and ...

This study aimed to assess the clinical significance of ventilation and perfusion metrics derived from changes in radiographic lung density on DCR

A systematically compiled set of quantitative metrics to describe ...

For each spatial dose property, we compared the responses of its corresponding metrics to simulated dose variations in a virtual water phantom.

A comparison of two peak skin dose metrics calculated by patient ...

We have shown mean deviations between these two systems. This difference is enough, for higher peak skin absorbed dose patients, to change the ...

Intra-fractional geometric and dose/volume metric variations ... - phiRO

Intra-fractional geometric and dose/volume metric variations of magnetic resonance imaging-guided stereotactic radiotherapy of prostate bed ...

A new predictive parameter for dose‐volume metrics in intensity ...

In this study, we hypothesize that the prediction of dose-volume metrics using the COPP will be improved by considering the relationship between ...

Beyond Mean Heart Dose: Cardiac Metrics for the Modern Era

For example, how do variations in dose and fractionation affect these constraints? ... Finally, the relationship between radiation dose to the heart and long-term ...

International variation in radiation dose for computed tomography ...

For abdomen CT examinations, the unadjusted 95th percentile of relative dose was 2.65, and the mean effective dose ranged from 7.3 mSv in ...

Defined Daily Dose (DDD) - World Health Organization (WHO)

There are also international differences between PDDs, which can be up to four or five fold higher/lower. PDDs in Asian populations are often lower than in ...

VQ Scan: Purpose, Procedure, Risks, Recovery & Results

You might also hear it called a ventilation-perfusion scan, a lung scan or lung scintigraphy. ... What is the difference between a CT scan and a VQ scan?