Comparative study of abdominal CT enhancement in overweight and obese patients based on different scanning modes combined with different contrast medium concentrations.
J Xray Sci Technol
; 32(3): 569-581, 2024.
Article
in En
| MEDLINE
| ID: mdl-38217636
ABSTRACT
PURPOSE:
To compare image quality, iodine intake, and radiation dose in overweight and obese patients undergoing abdominal computed tomography (CT) enhancement using different scanning modes and contrast medium.METHODS:
Ninety overweight and obese patients (25âkg/m2≤body mass index (BMI)<â30âkg/m2 and BMI≥30âkg/m2) who underwent abdominal CT-enhanced examinations were randomized into three groups (A, B, and C) of 30 each and scanned using gemstone spectral imaging (GSI) +320âmgI/ml, 100âkVp + 370âmgI/ml, and 120âkVp + 370âmgI/ml, respectively. Reconstruct monochromatic energy images of group A at 50-70âkeV (5âkeV interval). The iodine intake and radiation dose of each group were recorded and calculated. The CT values, contrast-to-noise ratios (CNRs), and subjective scores of each subgroup image in group A versus images in groups B and C were by using one-way analysis of variance or Kruskal-Wallis H test, and the optimal keV of group A was selected.RESULTS:
The dual-phase CT values and CNRs of each part in group A were higher than or similar to those in groups B and C at 50-60âkeV, and similar to or lower than those in groups B and C at 65âkeV and 70âkeV. The subjective scores of the dual-phase images in group A were lower than those of groups B and C at 50âkeV and 55âkeV, whereas no significant difference was seen at 60-70âkeV. Compared to groups B and C, the iodine intake in group A decreased by 12.5% and 13.3%, respectively. The effective doses in groups A and B were 24.7% and 25.8% lower than those in group C, respectively.CONCLUSION:
GSI +320âmgI/ml for abdominal CT-enhanced in overweight patients satisfies image quality while reducing iodine intake and radiation dose, and the optimal keV was 60âkeV.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radiography, Abdominal
/
Tomography, X-Ray Computed
/
Contrast Media
/
Overweight
/
Obesity
Type of study:
Clinical_trials
Limits:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
J Xray Sci Technol
Journal subject:
RADIOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
China
Country of publication:
Países Bajos