Rapid multiplanar abdominal survey using MRI with the steady-state free-precession technique.

Publication/Presentation Date

1-1-2008

Abstract

PURPOSE: To retrospectively evaluate the sensitivity, specificity, and positive and negative predictive values of steady-state free-precession (SSFP) survey MRI of the abdomen.

MATERIALS AND METHODS: A total of 375 consecutive outpatients underwent abdominal MRI at 1.5T. Excluding diffuse metastatic disease, 110 patients had at least one other clinically important finding. The SSFP survey included contiguous 5-mm-thick axial, sagittal, and coronal slices (total 90 slices) obtained during a total of 90 seconds of free breathing. Studies were reviewed by two experienced MRI readers independently, randomized, blinded, and at different sittings. The chi-squared test was used to compare SSFP to full MRI for showing clinically important findings. In a subset of 30 patients, confidence intervals (CI) were calculated to compare the accuracy of SSFP and full MRI as predictors of biopsy result.

RESULTS: SSFP detected 87.3% of clinically important findings and 93.3% of malignancies reported on the full MRI, with a 1.5% false-positive rate. Significant association was shown between SSFP and full MRI for clinically important findings (P < 0.0001). Compared to biopsy, accuracy of SSFP was high (85% +/- 12.7%), though not as high as full MRI (93.3% +/- 8.8%).

CONCLUSION: SSFP provides a rapid survey of the abdomen, with good sensitivity and few false positives.

Volume

27

Issue

1

First Page

198

Last Page

203

ISSN

1053-1807

Disciplines

Diagnosis | Medicine and Health Sciences | Other Analytical, Diagnostic and Therapeutic Techniques and Equipment | Radiology

PubMedID

18022845

Department(s)

Department of Radiology and Diagnostic Medical Imaging

Document Type

Article

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