|
KMID : 1151820170110060493
|
|
Journal of the Korean Society of Radiology
2017 Volume.11 No. 6 p.493 ~ p.500
|
|
|
Quantitative Assessment using SNR and CNR in Cerebrovascular Diseases : Focusing on FRE-MRA, CTA Imaging Method
|
|
Goo Eun-Hoe
|
|
|
Abstract
|
|
|
|
In this study, data analysis has been conducted by INFINITT program to analyze the effect of signal to noise ratio(SNR) and contrast to noise ratio(CNR) of flow related enhancement(FRE) and computed tomography Angiography(CTA) on cerebrovascular diseases for qualitative evaluations. Based on the cerebrovascular image results achieved from 63 patients (January to April, 2017, at C University Hospital), we have selected 19 patients that performed both FRE-MRA and CTA. From the 19 patients, 2 were excluded due to artifacts from movements in the cerebrovascular image results. For the analysis conditions, we have set the 5 part (anterior cerebral artery, right and left Middle cerebral artery, right and left Posterior cerebral artery) as the interest area to evaluate the SNR and CNR, and the results were validated through Independence t Test. As a result, by averaging the SNR, and CNR values, the corresponding FRE-MRA achieved were: anterior cerebral artery (1500.73 ± 12.23/970.43 ± 14.55), right middle cerebral artery (1470.16 ± 11.46/919.44 ± 13.29), left middle cerebral artery (1457.48 ± 17.11/903.96 ± 14.53), right posterior cerebral artery (1385.83 ± 16.52/852.11 ± 14.58), left posterior cerebral artery (1318.52 ± 13.49/756.21 ± 10.88). by averaging the SNR, and CNR values, the corresponding CTA achieved were: anterior cerebral artery (159.95 ± 12.23/123.36 ± 11.78), right middle cerebral artery (236.66 ± 17.52/202.37 ± 15.20), left middle cerebral artery (224.85 ± 13.45/193.14 ± 11.88), right posterior cerebral artery (183.65 ± 13.47/151.44 ± 11.48), left posterior cerebral artery (177.7 ± 16.72/144.71 ± 11.43) (p < 0.05). In conclusion, MRA had high SNR and CNR value regardless of the cerebral infarction or cerebral hemorrhage observed in the 5 part of the brain. Although FRE-MRA consumed longer time, it proved to have less side effect of contrast media when compared to the CTA.
|
|
|
KEYWORD
|
|
|
Signal to Noise Ratio, Contrast to Noise Ratio, Flow-Related Enhancement Magnetic Resonance Angiography, Computed Tomography Angiography
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|