کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4223353 1281827 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Increased Computed Tomography Dose Due to Miscentering With Use of Automated Tube Voltage Selection: Phantom and Patient Study
ترجمه فارسی عنوان
افزایش تجمع کامپیوتری به علت غربالگری با استفاده از انتخاب ولتاژ لوله خودکار: مطالعه فانتوم و بیمار
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی رادیولوژی و تصویربرداری
چکیده انگلیسی

The purpose of the article is to determine if miscentering affected dose with use of automated tube voltage selection software. An anthropomorphic phantom was imaged at different table heights (centered in the computed tomography [CT] gantry, and −6, −3, +3, and +5.7 cm relative to the centered position). Topogram magnification, tube voltage selection, and dose were assessed. Effect of table height on dose also was assessed retrospectively in human subjects (n = 50). When the CT table was positioned closer to the x-ray source, subjects appeared up to 33% magnified in topogram images. When subjects appeared magnified in topogram images, automated software selected higher tube potentials and tube currents that were based on the magnified size of the subject rather than the subject׳s true size. Table height strongly correlated with CT dose index (r = 0.98, P < 0.05) and dose length product (r = 0.98, P < 0.05) in the phantom study. Transverse dimension in the topogram highly correlated with dose in human subjects (r = 0.75-0.87, P <0.05). Miscentering results in increased dose due to topogram magnification with automated voltage selection software.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Problems in Diagnostic Radiology - Volume 45, Issue 4, July–August 2016, Pages 265–270
نویسندگان
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