Measurement of bow tie profiles in CT scanners using a real‐time dosimeter

BR Whiting, JD Evans, AC Dohatcu… - Medical …, 2014 - Wiley Online Library
Purpose: Several areas of computed tomography (CT) research require knowledge about
the intensity profile of the x‐ray fan beam that is introduced by a bow tie filter. This …

Method for determining the half-value layer in computed tomography scans using a real-time dosimeter: application to dual-source dual-energy acquisition

K Matsubara, H Nagata, R Okubo, T Takata… - Physica Medica, 2017 - Elsevier
Purpose We have proposed a method for determining the half-value layers (HVL) in dual-
source dual-energy computed tomography (DS-DECT) scans without the need for the X-ray …

Direct and fast measurement of CT beam filter profiles with simultaneous geometrical calibration

K Yang, X Li, X George Xu, B Liu - Medical physics, 2017 - Wiley Online Library
Purpose To accurately measure the beam filter profiles from a variety of CT scanner models
and to provide reference data for Monte Carlo simulations of CT scanners. Methods This …

CT beam dosimetric characterization procedure for personalized dosimetry

S Rosendahl, L Büermann, M Borowski… - Physics in Medicine …, 2019 - iopscience.iop.org
Personalized dosimetry in computed tomography (CT) can be realized by a full Monte Carlo
(MC) simulation of the scan procedure. Essential input data needed for the simulation are …

Non-invasive experimental determination of a CT source model

B Alikhani, L Büermann - Physica Medica, 2016 - Elsevier
Non-invasive methods to determine equivalent X-ray source models of a CT scanner are
presented. A high-precision technique called TRIC (“Time Resolved Integrated Charge”) …

Measurement of the half-value layer for CT systems in a single-rotation technique: reduction of stray radiation with lead apertures

A Fukuda, N Ichikawa, M Tashiro, T Yamao… - Physica Medica, 2020 - Elsevier
Purpose This study aimed to compare two methods of assessing the half-value layer (HVL)
for computed tomography scanners in a single-rotation technique with and without lead …

A rapid noninvasive characterization of CT x‐ray sources

M Randazzo, M Tambasco - Medical Physics, 2015 - Wiley Online Library
Purpose: The aim of this study is to generate spatially varying half value layers (HVLs) that
can be used to construct virtual equivalent source models of computed tomography (CT) x …

Half-value layer measurements using solid-state detectors and single-rotation technique with lead apertures in spiral computed tomography with and without a tin filter

A Fukuda, N Ichikawa, T Hayashi, A Hirosawa… - … Physics and Technology, 2024 - Springer
Solid-state detectors (SSDs) may be used along with a lead collimator for half-value layer
(HVL) measurement using computed tomography (CT) with or without a tin filter. We aimed …

Estimation of primary radiation output for wide‐beam computed tomography scanner

A Fukuda, PJP Lin, N Ichikawa… - Journal of Applied …, 2019 - Wiley Online Library
Purpose To estimate in‐air primary radiation output in a wide‐beam multidetector computed
tomography (CT) scanner. Materials and methods A 6‐cc ionization chamber was placed …

Feasibility of the new copper pipe method for evaluating half‐value layer in computed tomography: A measurement and Monte Carlo simulation study

R Okubo, K Matsubara, T Chusin… - Journal of Applied …, 2019 - Wiley Online Library
This study aimed to verify the accuracy of half‐value layer (HVL) measured using the new
copper pipe method with the CT ionization chamber while the X‐ray tube is rotating and to …