Head and neck effective dose and quantitative assessment of image quality: a study to compare cone beam CT and multislice spiral CT

Abstract

CBCT was preferable to MSCT for the ear and dental arches volumetric imaging due to its lower radiation dose and significantly higher spatial resolution. In the case of cervical spine and head imaging, MSCT should be generally recommended if a high contrast resolution is required, despite the greater radiation exposure.

Radiation dose in non-dental cone beam CT applications: a systematic review

“…The main reasons for exclusion were that the studies did not focus on the field of dosimetry or did not report the effective dose. Among the 15 papers selected (14 original papers [27][28][29][30][31][32][33][34][35][36][37][38][39][40] and 1 conference proceeding [41]), two of them analysed two anatomical areas; all the others analysed only one anatomical area ( Table 2). The following anatomical areas were analysed: ear [27][28][29][30][31][32], paranasal sinuses [27,33,34,41], ankle [35][36][37], wrist [38,39], knee [40], and cervical spine [32].…”

“…In the 15 studies examined, 16 CBCT-units (seven different models) were used, of which five were from the USA [29,33,34,36,41], Finland [31,35,37,38,40], and Italy [27,28,32,35,39], and the remaining one from Japan [30]. One study [31] used a modified specific acquisition system that involved a pause during each exposure of the multiple frames to reduce potential motion artefacts generated by the rotating "C" arm.…”

“…Finally, although it is beyond the purpose of the review, two studies [32,33] provided a quantitative assessment of image quality. They are the only two studies published in 2017.…”

“…Nevertheless, TLDs need to be replaced within the phantom after every exposure. Nardi et al [32] Cervical spine Since several exposures are recommended to attain more reliable dosimetric values, measuring the effective dose by TLD is very laborious, time-consuming, and prone to mistakes. To overcome these limitations, MOS-FET dosimeters have been introduced lately.…”

Diffusion-Weighted and Perfusion-Weighted MRI to Evaluate Therapeutic Response in Lymphoma: A Comparison with FDG-PET/CT

“…In long-term follow-up, often in young patients, an important issue to consider is the exposure to ionizing radiation. The mean effective dose of PET/CT examinations is 19.6 ± 6.1 mSv [3], corresponding with the radiation of about 1,000 chest X-rays and 10 head CTs [4]. Few studies have investigated the role of advanced magnetic resonance (MR) techniques by the 2 quantitative parameters, diffusion-weighted imaging (DwI) and perfusion-weighted imaging (PwI).…”