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Effect of Region of Interest on Interobserver Variance in Apparent Diffusion Coefficient Measures

Yasemin Bilgilia and Birsen Unala

a From the Department of Radiology, Kirikkale University School of Medicine, Süleyman Demirel Hospital, Kirikkale, Turkey



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  		FIG 1. ADC values obtained from the sentrium semiovale.

A, Observer 1.

B, Observer 2.



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  		FIG 2. ADC values obtained in the pons.

A, Observer 1.

B, Observer 2.



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  		FIG 3. ADC values obtained in the substantia nigra.

A, ADC value obtained by observer 1 from the substantia nigra with a small region of interest size.

B, ADC value obtained by observer 1 from the substantia nigra with a larger region of interest size.





Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X