Accuracy of Contrast-to-noise Ratio Measurement for Magnetic Resonance Clinical Images

Accuracy of Contrast-to-noise Ratio Measurement for Magnetic Resonance Clinical Images

The contrast-to-noise ratio (CNR.) is often used to evaluate magnetic resonance images, because it has two components, contrast and SNR, and indicates the detectability of clinical lesions. Two methods (using a phantom and using clinical images) are employed to measure CNR. In addition, there are so...

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Veröffentlicht in:Japanese Journal of Radiological Technology 2004/11/20, Vol.60(11), pp.1543-1549
Hauptverfasser: OGURA, AKIO, MAEDA, FUMIE, MIYAI, AKIRA, HONGOH, TAKAHARU
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
Brain - anatomy & histology
Contrast-to-noise ratio (CNR)
Detectability
Humans
Magnetic resonance imaging
Magnetic Resonance Imaging - methods
Phantoms, Imaging
Sensitivity and Specificity
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container_end_page 1549
container_issue 11
container_start_page 1543
container_title Japanese Journal of Radiological Technology
container_volume 60
creator OGURA, AKIO
MAEDA, FUMIE
MIYAI, AKIRA
HONGOH, TAKAHARU
description The contrast-to-noise ratio (CNR.) is often used to evaluate magnetic resonance images, because it has two components, contrast and SNR, and indicates the detectability of clinical lesions. Two methods (using a phantom and using clinical images) are employed to measure CNR. In addition, there are some methods of measurement that use clinical images. In this report, the accuracy of measurement and correlation for signal detectability were evaluated in four methods of measuring CNR using clinical images. The results indicated that the inter-tissue method using an air signal provided good accuracy and was consistent with signal detectability using observer performance. In addition, a small region of interest (ROI) was better suited as the target for CNR measurement using clinical images.
doi_str_mv 10.6009/jjrt.KJ00003326578
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subjects Brain - anatomy & histology
Contrast-to-noise ratio (CNR)
Detectability
Humans
Magnetic resonance imaging
Magnetic Resonance Imaging - methods
Phantoms, Imaging
Sensitivity and Specificity
title Accuracy of Contrast-to-noise Ratio Measurement for Magnetic Resonance Clinical Images
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