Characterization of Image Quality between Multi-Slice Computed Tomography and Cone Beam Computed Tomography for Clinical Used Protocols in Radiation Therapy Treatment Planning
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University of Toledo Health Science Campus / OhioLINK
2017
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=mco151080400269082 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-mco1510804002690822021-08-03T07:04:34Z Characterization of Image Quality between Multi-Slice Computed Tomography and Cone Beam Computed Tomography for Clinical Used Protocols in Radiation Therapy Treatment Planning Alarady, Mamdooh R. Medical Imaging Physics From diagnosis to treatment and continuous monitoring, imaging is one of the most important steps of cancer treatment. Diagnostic imaging is a useful tool that allows healthcare professionals to obtain anatomical and physiological information from patients’ in a non-invasive way. In Radiation Oncology, x-ray imaging is used to calculate the anatomical radiation dose as well as it can be a tool for assessing correct positioning of a patient through a treatment course. Image quality is a key factor in the process of cancer patient care for all the treatment team. Radiation Oncologists use Computed Tomography (CT) images to identify a tumor and delineate a target for radiation therapy planning. Medical Physicists fuse CT images with images from other modalities such as MRI to help physicians in tumor anatomy contouring. The physicists also use the CT images for radiation treatment planning. Radiation Therapists use CT images to accurately position patients prior to radiation therapy sessions. Due to its importance in Radiation Oncology, the quality control of imaging systems is commonly incorporated into the quality assurance program in Radiation Oncology.This research has characterized the differences in image quality between two imaging modalities, Fan Beam CT (FBCT) and Cone Beam CT (CBCT). For the three scanners that we have in the University of Toledo Dana cancer center, two CBCT, Varian True Beam OBI CBCT and Varian Edge OBI CBCT, and one FBCT, Philips Gemini TF Big Bore PET/CT, were used for this study. We analyzed image quality using several routine scanning protocols on the three imaging systems. Seven parameters of image quality have been evaluated; slice thickness, spatial linearity, CT number accuracy, spatial resolution, low contrast detectability, contrast-to-noise ratio (CNR) and image uniformity. All tests were conducted using the Catphan-504 phantom. Image analysis was done using two methods, automated software and manual analysis. The automated software was RIT software (version 6.6) while the manual analysis was done using a software called MIM software (version 5.6). The comparison showed a similarity in all parameters except of the low contrast detectability, where the FBCT was superior to the CBCT. The latter finding may be attributed to the excess scattered radiation at the detector in CBCT, which in turn increases the noise and degrades the low contrast detectability. 2017 English text University of Toledo Health Science Campus / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=mco151080400269082 http://rave.ohiolink.edu/etdc/view?acc_num=mco151080400269082 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Medical Imaging Physics |
| spellingShingle |
Medical Imaging Physics Alarady, Mamdooh R. Characterization of Image Quality between Multi-Slice Computed Tomography and Cone Beam Computed Tomography for Clinical Used Protocols in Radiation Therapy Treatment Planning |
| author |
Alarady, Mamdooh R. |
| author_facet |
Alarady, Mamdooh R. |
| author_sort |
Alarady, Mamdooh R. |
| title |
Characterization of Image Quality between Multi-Slice Computed Tomography and Cone Beam Computed Tomography for Clinical Used Protocols in Radiation Therapy Treatment Planning |
| title_short |
Characterization of Image Quality between Multi-Slice Computed Tomography and Cone Beam Computed Tomography for Clinical Used Protocols in Radiation Therapy Treatment Planning |
| title_full |
Characterization of Image Quality between Multi-Slice Computed Tomography and Cone Beam Computed Tomography for Clinical Used Protocols in Radiation Therapy Treatment Planning |
| title_fullStr |
Characterization of Image Quality between Multi-Slice Computed Tomography and Cone Beam Computed Tomography for Clinical Used Protocols in Radiation Therapy Treatment Planning |
| title_full_unstemmed |
Characterization of Image Quality between Multi-Slice Computed Tomography and Cone Beam Computed Tomography for Clinical Used Protocols in Radiation Therapy Treatment Planning |
| title_sort |
characterization of image quality between multi-slice computed tomography and cone beam computed tomography for clinical used protocols in radiation therapy treatment planning |
| publisher |
University of Toledo Health Science Campus / OhioLINK |
| publishDate |
2017 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=mco151080400269082 |
| work_keys_str_mv |
AT alaradymamdoohr characterizationofimagequalitybetweenmultislicecomputedtomographyandconebeamcomputedtomographyforclinicalusedprotocolsinradiationtherapytreatmentplanning |
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1719453077321285632 |