|
KMID : 1149020200220020017
|
|
Journal of Korean Society of Computed Tomographic Technology
2020 Volume.22 No. 2 p.17 ~ p.25
|
|
|
Comparison of Image Quality using Various Quantitative Evaluation Methods between Sequence and Spiral scan during Brain CT
|
|
Son In-Chul
Lee Ki-Baek
|
|
|
Abstract
|
|
|
|
There are two scan methods such as sequence and spiral scan in CT examination.I n Brain CT, the sequence scan mode has been utilized more than the spiral mode due to having better image quality.H owever, this evaluation of image quality was mainly subjective assessment and had some limitation.S o, we tried to analyze the image quality of brain CT between the sequence and spiral mode with 20 patients data and an ACR phantom by using various quantitative evaluation such as CT number, image noise, contrast to noise ratio (CNR), and histogram-based analysis.E ach result of CT number, image noise, CNR between two modes (Sequence vs Spiral) were as follows: 31.73 ± 3.96 vs 31.92 ± 3.25, 3.53 ± 0.63 vs 4.1 ± 0.54, 275.82 ± 43.49 vs 239.76 ± 31.88. Overall quantitative image quality of the sequence mode were better than the spiral mode in the study of patient images.A lso, histogram analysis by using the ACR phantom represented higher figures of targeted CT number in the sequence mode than the spiral mode. Additionally, all graphs of phantom images with the sequence scan had high profiles.A s a results, the sequence scan mode had better quantitative image quality and histogram based evaluation was proven by very useful method to distinguish the low contrast resolution between different two vague portions.
|
|
|
KEYWORD
|
|
|
brain CT, quantitative assessment, histogram-based evaluation, sequence scan, spiral scan
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|