Hounsfield Unit inaccuracy in computed tomography lesion size and density, diagnostic quality vs attenuation correction

Katy Szczepura; John Thompson; David Manning

doi:10.1117/12.2254275

28 April 2017 Hounsfield Unit inaccuracy in computed tomography lesion size and density, diagnostic quality vs attenuation correction

Katy Szczepura, John Thompson, David Manning

Author Affiliations +

Proceedings Volume 10136, Medical Imaging 2017: Image Perception, Observer Performance, and Technology Assessment; 101361B (2017) https://doi.org/10.1117/12.2254275
Event: SPIE Medical Imaging, 2017, Orlando, Florida, United States

Abstract

In computed tomography the Hounsfield Units (HU) are used as an indicator of the tissue type based on the linear attenuation coefficients of the tissue. HU accuracy is essential when this metric is used in any form to support diagnosis. In hybrid imaging, such as SPECT/CT and PET/CT, the information is used for attenuation correction (AC) of the emission images. This work investigates the HU accuracy of nodules of known size and HU, comparing diagnostic quality (DQ) images with images used for AC.

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Katy Szczepura, John Thompson, and David Manning "Hounsfield Unit inaccuracy in computed tomography lesion size and density, diagnostic quality vs attenuation correction", Proc. SPIE 10136, Medical Imaging 2017: Image Perception, Observer Performance, and Technology Assessment, 101361B (28 April 2017); https://doi.org/10.1117/12.2254275

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