Gareth Iball
Leeds Teaching Hospitals NHS Trust
Imaging phantomDosimeterQuality assuranceRisk assessmentRadiologyPET-CTIonization chamberLead (electronics)TomographyAutomatic exposure controlPediatricsHounsfield scaleMedical physicsElectromagnetic shieldingLead shieldingPolytraumaMajor traumaPelvisScannerAbdomenAngiographyLead apronNuclear medicineImage noiseRadiographyComputed tomographyImage qualityDose profileMedicineDosimetryInjury Severity ScoreImage-guided radiation therapy
Publications 17
#1Anthony Howard (University of Leeds)H-Index: 5
#2Robert West (University of Leeds)H-Index: 7
Last. Peter V. Giannoudis (University of Leeds)H-Index: 104
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OBJECTIVE The aims of this study were 3-fold: first, establish the level of radiation exposure experienced by the pediatric trauma patients; second, model the level of risk of developing fatal carcinogenesis; and third, test whether pattern of injury was predictive of the level of exposure. SUMMARY BACKGROUND DATA There are certain conditions that cause children to be exposed to increased radiation, that is, scoliosis, where level of radiation exposure is known. The extent that children are expo...
#1Mark Worrall (NHS Tayside)H-Index: 2
#1Mark Worrall (NHS Tayside)H-Index: 1
Last. Tim J WoodH-Index: 4
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: This work aims to assess the efficacy of x-ray quality assurance tests undertaken on fluoroscopy units in the UK. Information was gathered on the results of dosimetry and safety tests recommended by the reports of the Institute of Physics and Engineering in Medicine, and those additionally undertaken by medical physics departments. The assessment of efficacy considers the frequency with which a test result breaches the remedial level or other relevant threshold where applicable. The third quar...
1 CitationsSource
#1Anthony Howard (University of Leeds)H-Index: 5
#2Robert West (University of Leeds)H-Index: 121
Last. Peter V. Giannoudis (University of Leeds)H-Index: 104
view all 6 authors...
BACKGROUND: The utilization of medical imaging continues to rise, including routine use in major trauma centers. The aims of this study were to estimate the amount of radiation exposure from radiographic imaging and the associated fatal carcinogenesis risk among patients treated for polytrauma at 1 institution. METHODS: Included were patients who were admitted to our institution with an Injury Severity Score (ISS) of ≥16 during the period of January 2007 to December 2016. Records of patients wer...
4 CitationsSource
#1Ian Honey (Guy's and St Thomas' NHS Foundation Trust)H-Index: 1
#2Amy Rose (Barts Health NHS Trust)H-Index: 2
Last. Mark Worrall (Ninewells Hospital)H-Index: 2
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This work aims to assess the efficacy of current x-ray quality assurance (QA) testing regimes on tube and generator systems for general radiographic usage in the UK. 1393 sets of QA results data from 9 UK medical physics departments were collected and analysed. Test failure rates ranged from 0 % to 39% and were used to assess the likelihood of the test finding a fault. The magnitude of the recorded faults were used to assess the severity of the failure with due consideration to its impact on ima...
1 CitationsSource
ObjectivesThe aim of this study was to conduct a nationwide survey of computed tomography (CT) doses for a wide range of PET-CT and single photon emission computed tomography-computed tomography (SPECT-CT) imaging procedures, with the aim of generating proposed UK national diagnostic reference level
22 CitationsSource
#1Gareth Iball (LGI: Leeds General Infirmary)H-Index: 8
#1Gareth R. Iball (LGI: Leeds General Infirmary)H-Index: 3
Last. Elizabeth J. Crawford (LGI: Leeds General Infirmary)H-Index: 1
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The study purpose was to develop and validate a quality assurance test for CT automatic exposure control (AEC) systems based on a set of nested polymethylmethacrylate CTDI phantoms. The test phantom was created by offsetting the 16 cm head phantom within the 32 cm body annulus, thus creating a three part phantom. This was scanned at all acceptance, routine, and some nonroutine quality assurance visits over a period of 45 months, resulting in 115 separate AEC tests on scanners from four manufactu...
5 CitationsSource
#1Maria A Lewis (Guy's and St Thomas' NHS Foundation Trust)H-Index: 2
#2Vicky Goh ('KCL': King's College London)H-Index: 59
Last. Sarah Wayte (University Hospitals Coventry and Warwickshire NHS Trust)H-Index: 8
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Objectives To assess the cross-centre consistency of iodine enhancement, contrast-to-noise ratio and radiation dose in a multicentre perfusion CT trial of colorectal cancer.
4 CitationsSource
#1Gareth Iball (University of Manchester)H-Index: 8
#1Gareth R. IballH-Index: 1
Last. Deborah ToutH-Index: 5
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OBJECTIVES: Computed tomography (CT) automatic exposure control (AEC) systems are now used in all modern PET-CT scanners. A collaborative study was undertaken to compare AEC techniques of the three major PET-CT manufacturers for fluorine-18 fluorodeoxyglucose half-body oncology imaging. MATERIALS AND METHODS: An audit of 70 patients was performed for half-body CT scans taken on a GE Discovery 690, Philips Gemini TF and Siemens Biograph mCT (all 64-slice CT). Patient demographic and dose informat...
6 CitationsSource
#1Jonathan R SykesH-Index: 19
#2R. LindsayH-Index: 3
Last. David Thwaites (USYD: University of Sydney)H-Index: 22
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The use of Cone beam CT (CBCT) systems for Image Guided Radiotherapy is rapidly expanding in the developed world. With its use comes concern for the increased risks of additional radiation exposure. Quantification of the imaging dose is necessary in order to report, optimise and justify CBCT exposures. This article reviews the current methods of dose measurement and calculation including dose measurements in cylindrical phantoms, use of point dosimeters in anthropomorphic phantoms, calculation o...
18 CitationsSource
#1Guy Gherardi (University of Leeds)H-Index: 4
#2Gareth Iball (Leeds Teaching Hospitals NHS Trust)H-Index: 8
Last. John Thomson (Leeds Teaching Hospitals NHS Trust)H-Index: 19
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BACKGROUND: The use of imaging that employs ionising radiation is increasing in the setting of paediatric cardiology. Children's high radiosensitivity and the lack of contemporary radiation data warrant a review of the radiation doses from the latest "state-of-the-art" angiography and computed tomography systems. OBJECTIVES: In children aged less than 16 years with congenital cardiac disease, we aimed to report: recent trends in the use of diagnostic angiography and cardiac dual-source computed ...
17 CitationsSource