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Hounsfield Unit inaccuracy in computed tomography lesion size and density, diagnostic quality vs attenuation correction (2017)
Journal Article
Szczepura, K., Thompson, J., & Manning, D. (2017). Hounsfield Unit inaccuracy in computed tomography lesion size and density, diagnostic quality vs attenuation correction. Proceedings of SPIE, 10136, https://doi.org/10.1117/12.2254275

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 ima... Read More about Hounsfield Unit inaccuracy in computed tomography lesion size and density, diagnostic quality vs attenuation correction.

Impact of tube current modulation on lesion conspicuity index in hi-resolution chest computed tomography (2017)
Journal Article
Szczepura, K., Tomkinson, D., & Manning, D. (2017). Impact of tube current modulation on lesion conspicuity index in hi-resolution chest computed tomography. Proceedings of SPIE, 10136, https://doi.org/10.1117/12.2254256

Tube current modulation is a method employed in the use of CT in an attempt to optimize radiation dose to the patient. The acceptable noise (noise index) can be varied, based on the level of optimization required; higher accepted noise reduces the pa... Read More about Impact of tube current modulation on lesion conspicuity index in hi-resolution chest computed tomography.

Effects of increased compression with an ultrasound transducer on the conspicuity of breast lesions in a phantom (2017)
Journal Article
Szczepura, K., Faqir, T., & Manning, D. (2017). Effects of increased compression with an ultrasound transducer on the conspicuity of breast lesions in a phantom. Proceedings of SPIE, 10136, https://doi.org/10.1117/12.2254263

Ultrasound imaging of the breast is highly operator dependent. The amount of pressure applied with the transducer has a direct impact on the lesion visibility in breast ultrasound. The conspicuity index is a quantitative measure of lesion visibility,... Read More about Effects of increased compression with an ultrasound transducer on the conspicuity of breast lesions in a phantom.

A JAFROC study of nodule detection performance in CT images of a thorax acquired during PET/CT (2017)
Journal Article
Thompson, J., Wareing, A., Szczepura, K., Vinjamuri, S., & Hogg, P. (2017). A JAFROC study of nodule detection performance in CT images of a thorax acquired during PET/CT. Radiography, 23(3), 191-196. https://doi.org/10.1016/j.radi.2017.03.001

Purpose Two types of CT images (modalities) are acquired in PET/CT: for attenuation correction (AC) and diagnosis. The purpose of the study was to compare nodule detection and localization performance between these two modalities. Methods CT... Read More about A JAFROC study of nodule detection performance in CT images of a thorax acquired during PET/CT.

Analysis of effective and organ dose estimation in CT when using mA modulation : a single scanner pilot study (2017)
Journal Article
Tootell, A., Szczepura, K., & Hogg, P. (2017). Analysis of effective and organ dose estimation in CT when using mA modulation : a single scanner pilot study. Radiography, 23(2), 159-166. https://doi.org/10.1016/j.radi.2017.02.006

Effective dose (ED) estimation in CT examinations can be obtained by combining dose length product (DLP) with published ED per DLP coefficients or performed using software. These methods do not account for tube current (mA) modulation which is influe... Read More about Analysis of effective and organ dose estimation in CT when using mA modulation : a single scanner pilot study.