Kirsten Boedeker
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View article: Perceptual thresholds for differences in CT noise texture
Perceptual thresholds for differences in CT noise texture Open
or is insufficient to describe noise texture completely. The discrimination of noise texture changes depending on its frequency content. Radiologists do not discriminate noise texture changes better than nonradiologists.
View article: Task-driven CT image quality optimization for low-contrast lesion detectability with tunable neural networks
Task-driven CT image quality optimization for low-contrast lesion detectability with tunable neural networks Open
Low-contrast lesions are difficult to detect in noisy low-dose CT images. Improving CT image quality for this detection task has the potential to improve diagnostic accuracy and patient outcomes. In this work, we use tunable neural network…
View article: Fourier Diffusion Models: A Method to Control MTF and NPS in Score-Based Stochastic Image Generation
Fourier Diffusion Models: A Method to Control MTF and NPS in Score-Based Stochastic Image Generation Open
Score-based stochastic denoising models have recently been demonstrated as powerful machine learning tools for conditional and unconditional image generation. The existing methods are based on a forward stochastic process wherein the train…
View article: Technical performance of a dual‐energy CT system with a novel deep‐learning based reconstruction process: Evaluation using an abdomen protocol
Technical performance of a dual‐energy CT system with a novel deep‐learning based reconstruction process: Evaluation using an abdomen protocol Open
Background A new tube voltage‐switching dual‐energy (DE) CT system using a novel deep‐learning based reconstruction process has been introduced. Characterizing the performance of this DE approach can help demonstrate its benefits and poten…
View article: Visibility of noise texture changes in CT images
Visibility of noise texture changes in CT images Open
Noise texture in CT images, commonly characterized by using the noise power spectrum (NPS), is mainly dictated by the shape of the reconstruction kernel. The peak frequency of the NPS (fpeak) is often used as a one-parameter metric for cha…
View article: CT imaging with ultra-high-resolution: Opportunities for cardiovascular imaging in clinical practice
CT imaging with ultra-high-resolution: Opportunities for cardiovascular imaging in clinical practice Open
Cardiovascular computed tomography (CT) angiography has become an established alternative to invasive catheter angiography. However, imaging artifacts due to partial volume effects with current systems hinder accurate evaluation of calcifi…
View article: Principles and applications of multienergy CT: Report of AAPM Task Group 291
Principles and applications of multienergy CT: Report of AAPM Task Group 291 Open
In x‐ray computed tomography (CT), materials with different elemental compositions can have identical CT number values, depending on the mass density of each material and the energy of the detected x‐ray beam. Differentiating and classifyi…