8 results match your criteria: "WI (T.P.S.); and Kaiser Foundation Health Plan and Hospitals (A.B.B.).[Affiliation]"
J Comput Assist Tomogr
January 2025
GE HealthCare, Waukesha, WI.
Objective: Patient positioning during clinical practice can be challenging, and mispositioning leads to a change in CT number. CT number fluctuation was assessed in single-energy (SE) EID, dual-energy (DE) EID, and deep silicon photon-counting detector (PCD) CT over water-equivalent diameter (WED) with different mispositions.
Methods: A phantom containing five clinically relevant inserts (Mercury Phantom, Gammex) was scanned on a clinical EID CT and a deep silicon PCD CT prototype at vertical positions of 0, 4, 8, and 12 cm.
J Thorac Imaging
November 2024
Departments of Radiology, Medical Physics, and Biomedical Engineering, University of Wisconsin Madison, Madison, WI.
Purpose: We investigated spatial resolution loss away from isocenter for a prototype deep silicon photon-counting detector (PCD) CT scanner and compare with a clinical energy-integrating detector (EID) CT scanner.
Materials And Methods: We performed three scans on a wire phantom at four positions (isocenter, 6.7, 11.
Invest Radiol
August 2024
From the Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA (R.S.-B., Y.W., C.S., J.L., P.W.C.); Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, CA (R.S.-B.); Philip R Lee Institute for Health Policy Studies, University of California San Francisco, San Francisco, CA (R.S.-B.); Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA (M.K.); Department of Radiology, University of Washington, Seattle, WA (A.C.W.); Department of Radiology, University of Maryland Medical Center and Baltimore VA Medical Center, Baltimore, MD (E.S.); Department of Medicine and Pediatrics, University of California Davis Health, Sacramento, CA (M.R., P.S.R.); Department of Radiology, University of Wisconsin, Madison, WI (T.P.S.); and Kaiser Foundation Health Plan and Hospitals (A.B.B.).
Objectives: The Centers for Medicare and Medicaid Services funded the development of a computed tomography (CT) quality measure for use in pay-for-performance programs, which balances automated assessments of radiation dose with image quality to incentivize dose reduction without compromising the diagnostic utility of the tests. However, no existing quantitative method for assessing CT image quality has been validated against radiologists' image quality assessments on a large number of CT examinations. Thus to develop an automated measure of image quality, we tested the relationship between radiologists' subjective ratings of image quality with measurements of radiation dose and image noise.
View Article and Find Full Text PDFAcad Radiol
October 2023
Department of Radiology, University of Wisconsin School of Medicine and Public Health, 600 Highland Ave, Madison, WI 53792 (G.V.T., C.M.B., R.M.B., K.L.S., M.G.L., T.P.S.); Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, 600 Highland Ave, Madison, WI 53792 (G.V.T., T.P.S.); Department of Biomedical Engineering, University of Wisconsin-Madison, 1550 Engineering Dr, Madison, WI 53792 (T.P.S.).
Rationale And Objectives: Syringeless power injectors obviate the need for reloading iodinated contrast media (ICM) and plastic consumable pistons between exams. This study evaluates the potential time and material waste (ICM, plastic, saline, and total) saved using a multi-use syringeless injector (MUSI) compared to a single-use syringe-based injector (SUSI).
Materials And Methods: Two observers recorded technologist time spent using a SUSI and a MUSI over three clinical workdays.
J Comput Assist Tomogr
July 2023
Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI.
Purposes: The aims of the study are to identify factors contributing to computed tomography (CT) trauma scan turnaround time variation and to evaluate the effects of an automated intervention on time metrics.
Methods: Throughput metrics were captured via picture archiving and communication system from January 1, 2018, to December 16, 2019, and included 17,709 CT trauma scans from our institution. Initial data showed that imaging technologist variation played a significant role in trauma imaging turnaround time.
J Comput Assist Tomogr
March 2023
Department of Radiology, University of Wisconsin Madison School of Medicine and Public Health, Madison, WI.
Objectives: To provide the radiology community with data to address the question: "Compared with peer institutions, is my institution efficiently using its electrocardiographic (ECG) gating and cerebral perfusion-capable computed tomography (CT) scanners?"
Methods: In this retrospective study, we analyze 6 months of scanner utilization data from 62 institutions (299 locations, 507 scanners) to identify scanners capable of performing ECG gating and perfusion CT studies. We report the number of ECG gating/perfusion-capable scanners and locations as a function of the total number of locations and scanners in each institution. We additionally regress the number of ECG-gated and perfusion examinations on (1) the number of locations/scanners capable of performing these examinations and (2) the fraction of the institution's CT examination volume that requires ECG gating or perfusion.
J Cachexia Sarcopenia Muscle
December 2022
Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, USA.
Computed tomography (CT) is a valuable assessment method for muscle pathologies such as sarcopenia, cachexia, and myosteatosis. However, several key underappreciated scan imaging parameters need consideration for both research and clinical use, specifically CT kilovoltage and the use of contrast material. We conducted a scoping review to assess these effects on CT muscle measures.
View Article and Find Full Text PDFRadiology
April 2019
From the Departments of Medical Physics (M.G.W., Y.L., T.P.S., C.A.M.), Radiology (J.L.H., T.P.S., P.L., C.A.M., F.T.L.), Urology (J.L.H., F.T.L.), and Biomedical Engineering (T.P.S., F.T.L.), University of Wisconsin-Madison, 1111 Highland Ave, Madison, WI 53705.
Purpose To determine the feasibility of ultra-low-dose (ULD) CT fluoroscopy for performing percutaneous CT-guided interventions in an in vivo porcine model and to compare radiation dose, spatial accuracy, and metal artifact for conventional CT versus CT fluoroscopy. Materials and Methods An in vivo swine model was used (n = 4, ∼50 kg) for 20 procedures guided by 246 incremental conventional CT scans (mean, 12.5 scans per procedure).
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