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Correlation of patient weight and cross-sectional dimensions with subjective image quality at standard dose abdominal CT.

Abstract：

OBJECTIVE:We evaluated the association between patients' weight and abdominal cross-sectional dimensions and CT image quality. MATERIALS AND METHODS:We prospectively evaluated 39 cancer patients aged more than 65 years with multislice CT scan of abdomen. All patients underwent equilibrium phase contrast-enhanced abdominal CT with 4 slices (from top of the right kidney) obtained at standard tube current (240-280 mA). All other scanning parameters were held constant. Patients' weight was measured just prior to the study. Cross-sectional abdominal dimensions such as circumference, area, average anterior abdominal wall fat thickness and, anteroposterior and transverse diameters were measured in all patients. Two subspecialty radiologists reviewed randomized images for overall image quality of abdominal structures using 5- point scale. Non-parametric correlation analysis was performed to determine the association of image quality with patients' weight and cross-sectional abdominal dimensions. RESULTS:A statistically significant negative linear correlation of 0.46, 0.47, 0.47, 0.58, 0.56, 0.54, and 0.56 between patient weight, anterior abdominal fat thickness, anteroposterior and transverse diameter, circumference, cross-sectional area and image quality at standard scanning parameters was found (p<0.01). CONCLUSION:There is a significant association between image quality, patients' weight and cross-sectional abdominal dimensions. Maximum transverse diameter of the abdomen has the strongest association with subjective image quality.

journal_name

Korean J Radiol

journal_title

Korean journal of radiology

authors

Kalra MK,Maher MM,Prasad SR,Hayat MS,Blake MA,Varghese J,Halpern EF,Saini S

doi

10.3348/kjr.2003.4.4.234

subject

Has Abstract

pub_date

2003-10-01 00:00:00

pages

234-8

issue

4

eissn

1229-6929

issn

2005-8330

pii

2003v4n4p234

journal_volume

4

pub_type

杂志文章

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