Computed Tomography Dose Index Measurements in Wide-beam Computed Tomography System [PDF]
Journal of Medical PhysicsComputed tomography (CT) produces cross-sectional images for medical diagnosis; however, in wide cone-beam CT, conventional CT dose index (CTDI) measurements using a 100-mm ionization chamber (IC) underestimate dose for larger beam widths.
Sawwanee Asavaphatiboon +6 more
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Computed Dosimeter Dose Index on a 16-Slice Computed Tomography Scanner
Dose-Response, 2022 A computed tomography dose index can be used to quantify the radiation dose received during a CT scan and it is an indicator of the radiation dose to the polymetaylenmetaAcrylate (PMMA) standardized phantom. The objective of this study was 2-fold.
Tadelech S. Mekonin, Tilahun T. Deressu
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Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation. [PDF]
J Appl Clin Med Phys, 2021 AbstractThis study aims to investigate the influence of the phantom position on weighted computed tomography dose index (CTDIw) in cone beam computed tomography (CBCT) when assuming breast irradiation. Computed tomography dose index (CTDI) was measured by the x‐ray volume imaging of CBCT using parameters for image‐guided radiation therapy (IGRT) in ...
Ueno H +4 more
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Automated calculation of slice-specific volume computed tomography dose index, water-equivalent diameter, and size-specific dose estimation for computed tomography scans [PDF]
Diagnostic and Interventional RadiologyPURPOSE: To develop and validate an automated computational tool for calculating a slice-specific volume computed tomography (CT) dose index (CTDIvol), a water-equivalent diameter (Dw), and size-specific dose estimates (SSDEs) from CT images, addressing ...
Supawitoo Sookpeng +3 more
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Comparison of computed tomography dose index in polymethyl methacrylate and nylon dosimetry phantoms
Journal of Medical Physics, 2016 The use of computed tomography (CT) scanning has been growing steadily. Therefore, CT dose measurement is becoming increasingly important for patient protection and optimization. A phantom is an important tool for dose measurement.
Supawitoo Sookpeng +3 more
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Application of computed tomography dose index as dosimetric parameter in dental tomography [PDF]
RGO: Revista Gaúcha de Odontologia, 2021 Objective Quantify the CTDI from a reference beam, correcting this value for several beam widths from the ratio of CTDI100 values measured in the air, and verifying the underestimation of the dose comparing CTDI100 and CTDI300, applied to dental CBCT ...
Rodrigo Antonio Pereira MAURO +1 more
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Computed tomography dose index determination in dose modulation prospectively involving the third-generation iterative reconstruction and noise index. [PDF]
J Appl Clin Med Phys, 2023 AbstractPurposeOptimizing CT protocols is challenging in the presence of automatic dose modulation because the CT dose index (CTDIvol) at different patient sizes is unknown to the operator. The task is more difficult when both the image quality index and iterative reconstruction prospectively affect the dose determination. It is of interest in practice
Scott AW +4 more
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Database of normalised computed tomography dose index for retrospective CT dosimetry. [PDF]
J Radiol Prot, 2014 Volumetric computed tomography dose index (CTDIvol) is an important dose descriptor to reconstruct organ doses for patients combined with the organ dose calculated from computational human phantoms coupled with Monte Carlo transport techniques. CTDIvol can be derived from weighted CTDI (CTDIw) normalised to the tube current-time product (mGy/100 mAs ...
Lee E, Lamart S, Little MP, Lee C.
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The Egyptian Journal of Radiology and Nuclear MedicineIntroduction Advanced technologies in radiation treatment deliveries require high accuracy and precision in setup before treatment to get accurate dose delivery for planned target volumes.
Rama Devi +4 more
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A Study to Determine Whether the Volume-Weighted Computed Tomography Dose Index Gives Reasonable Estimates of Organ Doses for Thai Patients Undergoing Abdomen and Pelvis Computed Tomography Examinations. [PDF]
J Med Phys, 2017 Values for the CTDIvol, which is displayed on scanner consoles, give doses relative to a phantom much larger than most Thai patients, and the CTDIvol does not take account of differences in patient size, which affect organ doses.The purpose of this study was to evaluate relationships for size specific dose estimate (SSDE) and volume weighted computed ...
Sookpeng S, Martin CJ, Butdee C.
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