Scholars@Duke
Steven Mann

Steven Mann

Assistant Professor of Radiology
Radiology
steve.mann@duke.edu
2424 Erwin Rd, Suite 302, Box 2731, Durham, NC 27705
2424 Erwin Rd, Suite 302, Durham, NC 27705

Selected Publications

Patient Radiation Doses in Interventional Radiology Procedures: Comparison of Fluoroscopy Dose Indices between the American College of Radiology Dose Index Registry-Fluoroscopy Pilot and the Radiation Doses in Interventional Radiology Study.

Journal Article J Vasc Interv Radiol · April 2023 PURPOSE: To compare radiation dose index distributions for fluoroscopically guided interventions in interventional radiology from the American College of Radiology (ACR) Fluoroscopy Dose Index Registry (DIR-Fluoro) pilot to those from the Radiation Doses i ... Full text Link to item Cite

Patient Radiation Doses in IR Procedures: The American College of Radiology Dose Index Registry-Fluoroscopy Pilot.

Journal Article J Vasc Interv Radiol · April 2023 PURPOSE: To update normative data on fluoroscopy dose indices in the United States for the first time since the Radiation Doses in Interventional Radiology study in the late 1990s. MATERIALS AND METHODS: The Dose Index Registry-Fluoroscopy pilot study coll ... Full text Link to item Cite

The American College of Radiology Fluoroscopy Dose Index Registry Pilot: Technical Considerations and Dosimetric Performance of the Interventional Fluoroscopes.

Journal Article Journal of vascular and interventional radiology : JVIR · October 2020 PurposeTo characterize the accuracy and consistency of fluoroscope dose index reporting and report rates of occupational radiation safety hardware availability and use, trainee participation in procedures, and optional hardware availability at pil ... Full text Cite

Improved Dose Estimates for Fluoroscopically Guided Lumbar Epidural Injections.

Journal Article Pain Med · May 1, 2019 OBJECTIVE: The goal of the study was to determine the potential impact of system inaccuracies and table attenuation on fluoroscope-reported dose values. DESIGN: An Institutional Review Board-approved study was conducted to collect detailed acquisition and ... Full text Link to item Cite

Variability in radiation dose and image quality: A comparison across fluoroscopy-system vendors, generations of equipment and institutions.

Journal Article Catheter Cardiovasc Interv · December 1, 2018 OBJECTIVES: To evaluate differences in radiation dose and image quality across institutions, fluoroscope vendors and generations of fluoroscopes for pediatric cardiac catheterization. BACKGROUND: Increased recognition of the potentially harmful effects of ... Full text Link to item Cite

Characterization of CT Hounsfield Units for 3D acquisition trajectories on a dedicated breast CT system.

Journal Article J Xray Sci Technol · 2018 Hounsfield Units (HU) are used clinically in differentiating tissue types in a reconstructed CT image, and therefore the HU accuracy of a system is important, especially when using multiple sources, novel detector and non-traditional trajectories. Dedicate ... Full text Link to item Cite

Implementation and CT sampling characterization of a third-generation SPECT-CT system for dedicated breast imaging.

Journal Article J Med Imaging (Bellingham) · July 2017 Stand-alone cone beam computed tomography (CT) and single-photon emission computed tomography (SPECT) systems capable of complex acquisition trajectories have previously been developed for breast imaging. Fully three-dimensional (3-D) motions of SPECT syst ... Full text Link to item Cite

Characterization of X-ray scattering for various phantoms and clinical breast geometries using breast CT on a dedicated hybrid system.

Journal Article J Xray Sci Technol · 2017 OBJECTIVE: The purpose of this study was to utilize a dedicated breast CT system using a 2D beam stop array to physically evaluate the scatter to primary ratios (SPRs) of different geometric phantoms and prospectively acquired clinical patient data. METHOD ... Full text Link to item Cite

Abstract 12670: Variability in Radiation Dose and Image Quality: A Comparison Across Fluoroscopy-system Vendors and Generations of Equipment.

Journal Article Circulation · November 11, 2016 INTRODUCTION: Increased recognition of the potentially harmful effects of ionizing radiation has spurred technological advances to reduce exposure during fluoroscopy. However there is currently little understanding of the dose-image quality (IQ) relationsh ... Link to item Cite

Implementation and first results of the fully suspended cone beam CT and SPECT system for dedicated breast imaging

Conference 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015 · October 3, 2016 Stand-alone cone beam CT and SPECT systems capable of complex sinusoidal acquisition trajectories have previously been developed for dedicated breast imaging and used in early clinical studies. The fully-3D motions of the SPECT system can view into the che ... Full text Cite

Development of fully-3D CT in a hybrid SPECT-CT breast imaging system

Conference Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) · January 1, 2016 This work describes initial measurements with the CT subsystem of the assembled, fully-3D, hybrid SPECT-CT system for dedicated breast imaging. The hybrid system, designed for clinical breast imaging, consists of fully-flexible SPECT and CT subsystems, wit ... Full text Cite

Three dimensional dose distribution comparison of simple and complex acquisition trajectories in dedicated breast CT.

Journal Article Med Phys · August 2015 PURPOSE: A novel breast CT system capable of arbitrary 3D trajectories has been developed to address cone beam sampling insufficiency as well as to image further into the patient's chest wall. The purpose of this study was to characterize any trajectory-re ... Full text Link to item Cite

Characterization of simulated incident scatter and the impact on quantification in dedicated breast single-photon emission computed tomography.

Journal Article J Med Imaging (Bellingham) · July 2015 The objective was to characterize the changes seen from incident Monte Carlo-based scatter distributions in dedicated three-dimensional (3-D) breast single-photon emission computed tomography, with emphasis on the impact of scatter correction using the dua ... Full text Link to item Cite

Initial evaluation of a modified dual-energy window scatter correction method for CZT-based gamma cameras for breast SPECT

Conference Progress in Biomedical Optics and Imaging - Proceedings of SPIE · January 1, 2015 Solid state Cadmium Zinc Telluride (CZT) gamma cameras for SPECT imaging offer significantly improved energy resolution compared to traditional scintillation detectors. However, the photopeak resolution is often asymmetric due to incomplete charge collecti ... Full text Cite

Three dimensional dose distribution comparison of simple and complex acquisition trajectories in dedicated breast CT using radiochromic film

Conference Progress in Biomedical Optics and Imaging - Proceedings of SPIE · January 1, 2015 A novel breast CT system capable of traversing non-traditional 3D trajectories was developed to address cone beam sampling insufficiency for pendant breast imaging. The purpose of this study was to characterize differences in three dimensional x-ray dose d ... Full text Cite

MTF characterization in 2D and 3D for a high resolution, large field of view flat panel imager for cone beam CT

Journal Article Progress in Biomedical Optics and Imaging - Proceedings of SPIE · January 1, 2014 The 2D and 3D modulation transfer functions (MTFs) of a custom made, large 40x30cm2 area, 600- micron CsI-TFT based flat panel imager having 127-micron pixellation, along with the micro-fiber scintillator structure, were characterized in detail using vario ... Full text Cite

Comparison of the effect of simple and complex acquisition trajectories on the 2D SPR and 3D voxelized differences for dedicated breast CT imaging

Journal Article Progress in Biomedical Optics and Imaging - Proceedings of SPIE · January 1, 2014 The 2D scatter-to-primary (SPR) ratios and 3D voxelized difference volumes were characterized for a cone beam breast CT scanner capable of arbitrary (non-traditional) 3D trajectories. The CT system uses a 30x30cm2 flat panel imager with 197 micron pixellat ... Full text Cite

Design of a nested SPECT-CT system with fully suspended CT sub-system for dedicated breast imaging

Journal Article Progress in Biomedical Optics and Imaging - Proceedings of SPIE · January 1, 2014 A fully suspended, stand-Alone cone beam CT system capable of complex trajectories, in addition to a simple circular trajectory, has previously been developed and shown to minimize cone beam sampling insufficiencies and have better sampling close to the ch ... Full text Cite

Analysis of dependence of detector position on detected scatter distribution in dedicated breast SPECT

Journal Article Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) · January 1, 2014 In SPECT, scattered photons contribute to the detected signal, reducing contrast and quantification accuracy. Several methods exist to correct scatter, including the dual-energy window technique, but have not been fully evaluated on non-traditional SPECT t ... Full text Cite

Three dimensional dose distribution comparison of simple and complex acquisition trajectories in dedicated breast CT - A Monte Carlo study

Journal Article Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) · January 1, 2014 The purpose of this study was to characterize the three dimensional (3D) x-ray dose distributions in a target scanned with different acquisition trajectories for dedicated breast CT imaging. Monte Carlo simulations were used to evaluate two acquisition tra ... Full text Cite

Quantification of Tc-99m sestamibi distribution in normal breast tissue using dedicated breast SPECT-CT

Journal Article Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) · August 15, 2012 The use of Tc-99m-Sestamibi in molecular breast imaging is common due to its preferential uptake in malignant tissue. However, quantification of the baseline uptake in normal, healthy breast tissue is not possible using planar-imaging devices. Using our de ... Full text Cite

Initial evaluation of a newly developed high resolution CT imager for dedicated breast CT

Journal Article Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) · August 15, 2012 A new, high resolution 40x30cm 2 area CsI-TFT based CT imager having 127μm pixel pitch was developed for fully-3D breast CT imaging as part of a SPECT-CT system. The imager has two narrow edges suited for pendant breast CT imaging close to the chest wall. ... Full text Cite

SU-E-I-02: Size-Dependent Computed Tomography Histogram Analysis: Towards Breast Tissue Segmentation.

Journal Article Med Phys · June 2012 PURPOSE: To examine the effects of object size on scatter-corrected CT histograms to be used in threshold-based tissue segmentation. METHODS: A polyethylene cone filled with various concentrations of water and methanol mixtures, simulating glandular and ad ... Full text Link to item Cite

SU-E-l-01: Investigating the Dependence of 2D and 3D Scatter-To-Primary Ratios on Breast Density in Clinical Breast CT.

Conference Med Phys · June 2012 PURPOSE: To characterize 2D and 3D scatter-to-primary ratios (SPR) and investigate the dependence of SPR on breast density based on clinicalpatient imaging on our dedicated SPECT-CT mammotomography system. METHODS: As a part of an on-going IRB approved pro ... Full text Link to item Cite

Initial In Vivo Quantification of Tc-99m Sestamibi Uptake as a Function of Tissue Type in Healthy Breasts Using Dedicated Breast SPECT-CT.

Journal Article J Oncol · 2012 A pilot study is underway to quantify in vivo the uptake and distribution of Tc-99m Sestamibi in subjects without previous history of breast cancer using a dedicated SPECT-CT breast imaging system. Subjects undergoing diagnostic parathyroid imaging studies ... Full text Open Access Link to item Cite

Comparison of dual-window scatter correction and effective attenuation coefficients for quantification in dedicated breast SPECT

Journal Article IEEE Nuclear Science Symposium Conference Record · January 1, 2011 Correction for scattered and attenuated photons is necessary for accurate quantification in dedicated breast SPECT. An implemented dual energy window (DEW) scatter correction method along with attenuation correction has been shown to be accurate to within ... Full text Cite

Is SPECT or CT Based Attenuation Correction More Quantitatively Accurate for Dedicated Breast SPECT Acquired with Non-Traditional Trajectories?

Journal Article IEEE Nucl Sci Symp Conf Rec (1997) · 2010 Attenuation correction is necessary for SPECT quantification. There are a variety of methods to create attenuation maps. For dedicated breast SPECT imaging, it is unclear if either SPECT- or CT-based attenuation map would provide the most accurate quantifi ... Full text Link to item Cite