Clinical radiology · 2025
Identification of image quality degradation factors in abdominal free-breathing dynamic contrast-enhanced magnetic resonance imaging (MRI).
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Noda Y, Kawai N, Hirata M, Kaga T, Kajita K, Ueda Yu, Honda M, Hyodo F, Kato H, Matsuo M
Аннотация
AIM: To identify the image quality degradation factors (IQDF), which can be obtained precontrast in abdominal free-breathing dynamic contrast-enhanced magnetic resonance imaging (FB-DCEMRI).
MATERIALS AND METHODS: This retrospective study enrolled patients who underwent abdominal FB-DCEMRI. The patients' demographics and underlying diseases at the time of MRI were recorded. Two radiologists assessed the precontrast and arterial phase images and assigned the confidence scores for motion artifact, streak artifact, and overall image quality using a 5-point Likert scale. Acceptable image quality was defined as ≥3 points in the overall image quality at the arterial phase. Based on this assessment, patients were classified into two groups: acceptable and nonacceptable groups. The IQDF were identified through logistic regression analysis.
RESULTS: Among the 73 patients, 48 (66%) were included in the acceptable group, while 25 (34%) were included in the unacceptable group. Only the prevalence of cirrhosis was different between the two groups (4% vs 20% in the acceptable and unacceptable groups; P = .04). All the confidence scores were higher in the acceptable group than in the unacceptable group (P < .001-.007). Only cirrhosis (P = .03) and overall image quality at precontrast (P = .02) were identified as the IQDF. Furthermore, using the fitted logistic regression equation, the sensitivity, specificity, and area under the curve for predicting unacceptable image quality were 56% [14/25], 92% [44/48], and 0.79 [95% confidence interval, 0.68-0.87], respectively.
CONCLUSION: The presence of cirrhosis and unacceptable image quality at precontrast were identified as the IQDF based on the findings of the abdominal FB-DCEMRI.
MATERIALS AND METHODS: This retrospective study enrolled patients who underwent abdominal FB-DCEMRI. The patients' demographics and underlying diseases at the time of MRI were recorded. Two radiologists assessed the precontrast and arterial phase images and assigned the confidence scores for motion artifact, streak artifact, and overall image quality using a 5-point Likert scale. Acceptable image quality was defined as ≥3 points in the overall image quality at the arterial phase. Based on this assessment, patients were classified into two groups: acceptable and nonacceptable groups. The IQDF were identified through logistic regression analysis.
RESULTS: Among the 73 patients, 48 (66%) were included in the acceptable group, while 25 (34%) were included in the unacceptable group. Only the prevalence of cirrhosis was different between the two groups (4% vs 20% in the acceptable and unacceptable groups; P = .04). All the confidence scores were higher in the acceptable group than in the unacceptable group (P < .001-.007). Only cirrhosis (P = .03) and overall image quality at precontrast (P = .02) were identified as the IQDF. Furthermore, using the fitted logistic regression equation, the sensitivity, specificity, and area under the curve for predicting unacceptable image quality were 56% [14/25], 92% [44/48], and 0.79 [95% confidence interval, 0.68-0.87], respectively.
CONCLUSION: The presence of cirrhosis and unacceptable image quality at precontrast were identified as the IQDF based on the findings of the abdominal FB-DCEMRI.