Kenneth A. Fetterly
Mayo Clinic
Imaging phantomOpticsPhysicsRadiologyArtificial intelligenceBeam (structure)Optical transfer functionMaterials scienceFluoroscopyRadiation protectionAngiographyNuclear medicineMedical imagingComputer visionRadiographyComputer scienceImage qualityMedicineObserver (quantum physics)DICOM
73Publications
18H-index
1,113Citations
Publications 72
Newest
#1Daniel Gomez-Cardona (Gundersen Health System)H-Index: 2
#1Daniel Gomez-Cardona (Gundersen Health System)H-Index: 5
Last. Kenneth A. Fetterly (Mayo Clinic)H-Index: 18
view all 5 authors...
PURPOSE Channelized Hotelling observer (CHO) models have been implemented to assess imaging performance in x-ray angiography systems. While current methods are appropriate for assessing unprocessed images of moving test objects upon uniform-exposure backgrounds, they are inadequate for assessing conditions which more appropriately mimic clinical imaging conditions including the combination of moving test objects, complex anthropomorphic backgrounds, and image processing. In support of this broad...
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#1Kenneth A. Fetterly (Mayo Clinic)H-Index: 18
#2Andrea Ferrero (Mayo Clinic)H-Index: 8
Last. Nathaniel W. Taggart (Mayo Clinic)H-Index: 14
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Objectives The purpose of this study was to investigate the influence of simulated reduced-dose three-dimensional angiography (3DA) on the accuracy and precision of linear measurements derived from 3DA datasets. Background Three-dimensional angiography is performed during X-ray guided interventional procedures to aid diagnosis and inform treatment strategies for children and adults with congenital heart disease. However, 3DA contributes substantially to patient radiation dose and may lead to an ...
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#1Daniel L. Miller (Mayo Clinic)H-Index: 31
#2Beth A. Schueler (Mayo Clinic)H-Index: 31
Last. Mark D. Hindal (Mayo Clinic)H-Index: 3
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The effectiveness of commercially available radiation protection devices for operators performing fluoroscopically guided interventional procedures is variable, and information regarding device use...
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#1Ashley T. Tao (Mayo Clinic)H-Index: 3
#2Daniel L. Miller (Mayo Clinic)H-Index: 31
Last. Kenneth A. Fetterly (Mayo Clinic)H-Index: 18
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PURPOSE: While scatter from the patient is assumed to be the primary source of occupational radiation dose associated with fluoroscopically guided interventional procedures, the potential contribution of scatter from the x-ray collimator assembly is unknown. The purpose of this work was to survey clinical x-ray angiography systems to assess the potential contribution of collimator assembly scatter on occupational radiation dose. METHODS: Experimental methods were designed to measure the relative...
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#1Wei Zhou (Mayo Clinic)H-Index: 13
#2Gregory Michalak (Mayo Clinic)H-Index: 12
Last. Shuai Leng (Mayo Clinic)H-Index: 53
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In addition to low-energy-threshold images (TLIs), photon-counting detector (PCD) computed tomography (CT) can generate virtual monoenergetic images (VMIs) and iodine maps. Our study sought to determine the image type that maximizes iodine detectability. Adult abdominal phantoms with iodine inserts of various concentrations and lesion sizes were scanned on a PCD-CT system. TLIs, VMIs at 50 keV, and iodine maps were generated, and iodine contrast-to-noise ratio (CNR) was measured. A channelized H...
2 CitationsSource
#1Ashley Tao (Gundersen Health System)
#1Ashley T. Tao (Gundersen Health System)H-Index: 3
Last. Kenneth A. FetterlyH-Index: 18
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: Assessment of x-ray angiography system performance is typically performed using stationary test objects with simple geometries such as a disk on a uniform background. However, these methods do not represent realistic imaging conditions in interventional cardiology as anatomy and devices are inherently non-stationary due to cardiac motion. In this work, a novel implementation of the channelized Hotelling observer (CHO) was used to assess the influence of motion blur on object detectability. A s...
Source
#1Daniel Gomez-Cardona (Mayo Clinic)H-Index: 2
#1Daniel Gomez-Cardona (Mayo Clinic)H-Index: 5
Last. Kenneth A. FetterlyH-Index: 18
view all 5 authors...
Multiple efforts have been made in x-ray angiography to transition from traditional image quality metrics to mathematical observer models. Recent works have successfully implemented the channelized Hotelling observer (CHO) model for x-ray angiography systems. However, in these works the channel selection process is ambiguous and limits to identifying a range of frequencies and other channel parameters that are believed to represent the most relevant features of the imaging tasks. This channel se...
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PURPOSE: Electronic noise associated with passive pixel (PP) x-ray angiography flat panel detectors is known to compromise fluoroscopic image quality. An active pixel (AP) crystalline silicon x-ray detector with potential for reduced influence of electronic noise is commercially available. The purpose of this work was to compare the performance of the AP vs PP x-ray angiography detectors over a detector target dose (DTD) range relevant for invasive cardiology procedures. METHODS: A total of 16 p...
1 CitationsSource
#1Wei Zhou (Mayo Clinic)H-Index: 13
#2Rachel Schornak (Mayo Clinic)H-Index: 1
Last. Shuai Leng (Mayo Clinic)H-Index: 53
view all 9 authors...
Photon counting detector (PCD) based multi-energy CT is able to generate different types of images such as virtual monoenergetic images (VMIs) and material specific images (e.g., iodine maps) in addition to the conventional single energy images. The purpose of this study is to determine the image type that has optimal iodine detection and to determine the lowest detectable iodine concentration using a PCD-CT system. A 35 cm body phantom with iodine inserts of 4 concentrations and 2 sizes was sca...
1 CitationsSource
2 CitationsSource