Outputs (63)

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

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.

Impact of tube current modulation on nodule conspicuity index in hi-resolution chest computed tomography (2017)
Presentation / Conference
Szczepura, K., Tomkinson, D., & Manning, D. (2017, February). Impact of tube current modulation on nodule conspicuity index in hi-resolution chest computed tomography. Presented at SPIE Medical Imaging 2017 : Image Perception, Observer Performance, and Technology Assessment, Orlando, Florida, USA

Effective dose and effective risk from post-SPECT imaging of the lumbar spine (2016)
Journal Article

Purpose
Planar bone scans play an important role in the staging and monitoring of malignancy and metastases. Metastases in the lumbar spine are associated with significant morbidity, therefore accurate diagnosis is essential. Supplementary imaging... Read More about Effective dose and effective risk from post-SPECT imaging of the lumbar spine.

Validated novel software to measure the conspicuity index of lesions in DICOM images (2016)
Journal Article

Description of purpose
A novel software programme and associated Excel spreadsheet has been developed to provide an objective measure of the expected visual detectability of focal abnormalities within DICOM images.
Methodology
ROIs are drawn ar... Read More about Validated novel software to measure the conspicuity index of lesions in DICOM images.

Effect of reconstruction methods and x-ray tube current-time product on nodule detection in an anthropomorphic thorax phantom : a crossed-modality JAFROC observer study (2016)
Journal Article

Purpose: To evaluate nodule detection in an anthropomorphic chest phantom in computed tomography (CT) images reconstructed with adaptive iterative dose reduction 3D (AIDR3D) and filtered back projection (FBP) over a range of tube current-time product... Read More about Effect of reconstruction methods and x-ray tube current-time product on nodule detection in an anthropomorphic thorax phantom : a crossed-modality JAFROC observer study.

Does elevating image receptor increase breast receptor footprint and improve pressure balance? (2015)
Journal Article

There is no consensus in the literature regarding the image receptor (IR) position for the cradio-caudal
projection in mammography. Some literature indicates the IR should be positioned to the infra mammary
fold (IMF); other literature suggests the... Read More about Does elevating image receptor increase breast receptor footprint and improve pressure balance?.

A phantom-based JAFROC observer study of two CT reconstruction methods : the search for optimisation of lesion detection and effective dose (2015)
Journal Article

Purpose: To investigate the dose saving potential of iterative reconstruction (IR) in a computed tomography (CT) examination of the thorax.
Materials and Methods: An anthropomorphic chest phantom containing various configurations of simulated lesi... Read More about A phantom-based JAFROC observer study of two CT reconstruction methods : the search for optimisation of lesion detection and effective dose.