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New MRI series for kidney evaluation: Saving time and money.
- Source :
-
The British journal of radiology [Br J Radiol] 2019 Jul; Vol. 92 (1099), pp. 20190260. Date of Electronic Publication: 2019 Jun 12. - Publication Year :
- 2019
-
Abstract
- Objectives: This study investigates the diagnostic performance of a new T1 imaging series, generated by the digital subtraction of the opposed phase from in phase T <subscript>1</subscript> weighted images, in MRI for renal angiomyolipoma (AML) evaluation.<br />Methods: This retrospective study involved 96 patients, 63 (65.6%) with at least one renal AML and 33 (34.4%) healthy patients. Two radiologists having different experience retrospectively reviewed two MR imaging series, starting with in and out-phase T <subscript>1</subscript> weighted images and then the new subtracted T1 images, in which AML appeared white on black background. The presence, number, location, and dimensions of the AMLs, and reading time were collected separately for the two kidneys. Statistical analysis was carried out using the appropriate tests.<br />Results: The number of lesions identified and the evaluation of lesion dimension did not statistically differ between the different MR imaging series evaluated, without interobserver variability. Both percentage agreement of the total number of observations and the κ coefficient showed very good agreement between the radiologists. The median time for the diagnosis was statistically lower when using the subtracted T1 imaging series for both observers with a median gain from 6.5 to 15 s per identified lesion, resulting in a total time-saving of more than half (52.9%), in both patients with and without AMLs, and in patients with a single or with more than one AML ( p < 0.001).<br />Conclusions: The new subtracted T1 imaging series proved to be reliable in identifying fat-containing renal lesions, by both expert and non-expert radiologists, resulting in a saving of both time and money. Moreover, this new subtracted T1 imaging series could be an effective tool in non-dedicated kidney examinations in which a faster reading is advisable.<br />Advances in Knowledge: The opportunity of using a single set of MRI images in kidney evaluation for identifying fat-containing lesions, considerably reducing reading time, resulting in cost-effectiveness.
- Subjects :
- Diagnosis, Differential
Female
Humans
Kidney diagnostic imaging
Male
Middle Aged
Observer Variation
Reproducibility of Results
Retrospective Studies
Sensitivity and Specificity
Time
Angiomyolipoma diagnostic imaging
Kidney Neoplasms diagnostic imaging
Magnetic Resonance Imaging economics
Magnetic Resonance Imaging methods
Subjects
Details
- Language :
- English
- ISSN :
- 1748-880X
- Volume :
- 92
- Issue :
- 1099
- Database :
- MEDLINE
- Journal :
- The British journal of radiology
- Publication Type :
- Academic Journal
- Accession number :
- 31046410
- Full Text :
- https://doi.org/10.1259/bjr.20190260