Κατεύθυνση Ιατρική Φυσική-ΑκτινοφυσικήLibrary of the School of Health Sciences
Ιωάννης Δαμηλάκης, Καθηγητής, Τμήμα Ιατρικής, Πανεπιστήμιο Κρήτης
Κωνσταντίνος Περισυνάκης, Αναπληρωτής Καθηγητής, Τμήμα Ιατρικής, Πανεπιστήμιο Κρήτης
Θωμάς Μαρής, Αναπληρωτής Καθηγητής, Τμήμα Ιατρικής, Πανεπιστήμιο Κρήτης
Σύστημα αυτόματης επιλογής δυναμικού λυχνίας στην Υπολογιστική Τομογραφία - Η επίδραση στη δόση ακτινοβολίας ασθενούς και στην ποιότητα εικόνας
Automated tube voltage selection in Computed Tomography - The effect on radiation dose and image quality
The purpose of the proposed research is to study the image quality and radiation dose in patients who underwent abdominal computed tomography examinations. More specifically, the effect of ATVS system on patient's radiation dose as well as in the image quality was studied. The patients involved in the survey are categorized into two groups. GROUP A consists of patients who had already undergone abdominal CT examinations activating the ATCM system and a constant tube voltage value of 120 kVp (retrospective). GROUP B consists of patients who were programmed, according to the clinical routine, to undergo abdominal CT examination activating ATVS and ATCM (prospective) systems simultaneously. Each group consists of approximately 60 patients with similar average body size between the two groups. In order to study the effect on radiation dose the following data was recorded by DICOM: Computed Tomography Dose Index (CTDIvol), Dose Length Product (DLP). The study of image quality demands the following data, recorded by DICOM: Signal to Noise Ratio (SNR), Contrast to Noise Ratio (CNR).
Main subject category:
Computed Tomography, Automated Tube Voltage Selection, Radiation Dose Reduction in CT, Image Quality in CT
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