| Unenhanced MDCT in patients with suspected urinary stone disease: do coronal reformations improve diagnostic performance? | |
| | |
MedLine Citation:
|
PMID: 17646439 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
OBJECTIVE: The objectives of our study were to assess whether coronal reformations improve the diagnostic performance of MDCT in patients with acute flank pain and suspected urinary stone disease; and to determine if performing such reformations from 3-mm-thick sections is sufficient or if it is necessary to perform reformations from thinner sections. MATERIALS AND METHODS: We included 147 consecutive patients (72 women and 75 men; mean age +/- SD, 58 +/- 18.1 years) with suspected urinary stone disease who underwent unenhanced MDCT. Scans were obtained with a 4 x 1 mm collimation and were reconstructed with a section thickness of 1.25 and 3 mm. We compared the diagnostic yield of 3-mm axial sections with that of coronal reformations reconstructed from 1.25- and 3-mm axial sections. Imaging data were evaluated in random order by two radiologists. The significance of the difference between the axial sections and coronal multiplanar reformations (MPRs) was tested for the number, size, and location of uroliths and for the presence of alternative diagnoses. The time required for review by both observers was recorded. RESULTS: We found uroliths in 72 patients. There was no difference between 3-mm axial sections and coronal reformations from 1.25-mm sections with regard to the number of detected stones (n = 264 for both protocols), whereas coronal reformations from 3-mm sections revealed significantly fewer calcifications (n = 255, p = 0.016). Coronal reformations did not improve the localization of calcifications. Review time, however, was significantly shorter for coronal reformations than for axial sections (p = 0.001); however, coronal reformations were less sensitive than axial sections for the detection of additional findings suggestive of alternative diagnoses in 16 (30%) of 53 patients. CONCLUSION: Coronal reformations from MDCT do not improve urinary stone detection but may reduce evaluation time; however, there is the danger of missing additional findings. Coronal reformations reconstructed from thick (i.e., 3-5 mm) axial sections may result in reduced detection of small stones and should therefore be avoided. |
| | |
Authors:
|
Mazda Memarsadeghi; Cornelia Schaefer-Prokop; Mathias Prokop; Thomas H Helbich; Christian C Seitz; Iris M Noebauer-Huhmann; Gertraud Heinz-Peer |
Related Documents
:
|
11373199 - Phase inversion tissue harmonic sonographic imaging: a clinical utility study. 18178439 - Os odontoideum: report of three cases. 17762969 - Pelvic floor images: anatomy of the levator ani muscle. 11598259 - Evaluation of prospective living renal donors for laparoscopic nephrectomy with multise... 17500479 - Accuracy and stability of positioning in radiosurgery: long-term results of the gamma k... 18418139 - Pedicle screw placement with a free hand technique in thoracolumbar spine: is it safe? 21822769 - Real-time 3d fluoroscopy-guided large core needle biopsy of renal masses: a critical ea... 8633139 - Diffuse adenomyosis: comparison of endovaginal us and mr imaging with histopathologic c... 15134599 - Use of imaging studies in the diagnosis of vasculitis. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: AJR. American journal of roentgenology Volume: 189 ISSN: 1546-3141 ISO Abbreviation: AJR Am J Roentgenol Publication Date: 2007 Aug |
Date Detail:
|
Created Date: 2007-07-24 Completed Date: 2007-09-06 Revised Date: 2008-02-15 |
Medline Journal Info:
|
Nlm Unique ID: 7708173 Medline TA: AJR Am J Roentgenol Country: United States |
Other Details:
|
Languages: eng Pagination: W60-4 Citation Subset: AIM; IM |
Affiliation:
|
Department of Radiology, Medical University of Vienna, General Hospital of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria. mazda.memarsadeghi@meduniwien.ac.at |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Analysis of Variance Emergencies Female Humans Male Middle Aged Radiographic Image Interpretation, Computer-Assisted / methods* Retrospective Studies Tomography, X-Ray Computed* Urinary Calculi / radiography* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Error count of radiopaque markers in colonic segmental transit time study.
Next Document: The role of endoluminal imaging in clinical outcome of overlapping anterior anal sphincter repair in...