Radiation exposure of ovarian cancer patients: contribution of CT examinations performed on different MDCT (16 and 64 slices) scanners and image quality evaluation: an observational study

Stefania Rizzo, Daniela Origgi, Sarah Brambilla, Federica De Maria, Riccardo Foà, Sara Raimondi, Nicoletta Colombo, Massimo Bellomi

Research output: Contribution to journalArticlepeer-review

Abstract

The objective of this study is to compare radiation doses given to ovarian cancer patients by different computed tomographies (CTs) and to evaluate association between doses and subjective and objective image quality.CT examinations included were performed either on a 16-slice CT, equipped with automatic z-axis tube current modulation, or on a 64-slice CT, equipped with z-axis, xy-axis modulation, and adaptive statistical iterative algorithm (ASIR). Evaluation of dose included the following dose descriptors: volumetric CT dose index (CTDIvol), dose length product (DLP), and effective dose (E). Objective image noise was evaluated in abdominal aorta and liver. Subjective image quality was evaluated by assessment of image noise, spatial resolution and diagnostic acceptability.Mean and median CTDIvol, DLP, and E; correlation between CTDIvol and DLP and patients' weight; comparison of objective noise for the 2 scanners; association between dose descriptors and subjective image quality.The 64-slice CT delivered to patients 24.5% lower dose (P 

Original languageEnglish
Pages (from-to)e765
JournalMedicine (United States)
Volume94
Issue number17
DOIs
Publication statusPublished - May 1 2015

ASJC Scopus subject areas

  • Medicine(all)

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