| CT venography for deep venous thrombosis: continuous images versus reformatted discontinuous images using PIOPED II data. | |
| | |
MedLine Citation:
|
PMID: 17646468 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
OBJECTIVE: This study was designed to determine whether discontinuous CT of the lower extremities for the detection of deep venous thrombosis (DVT) yields results similar to those of complete helical imaging using cases from the Prospective Investigation of Pulmonary Embolism Diagnosis II (PIOPED II). MATERIALS AND METHODS: In PIOPED II, CT venography followed CT angiography (CTA) to detect pulmonary embolus, using 7.5-mm continuous helical imaging from the iliac crest to the tibial plateau. DVT was detected in 105 of 737 patients (14.2%). We randomly chose 54 positive cases and 96 negative cases for our study. The continuous helical images were reformatted as 7.5-mm images and two of every three images were deleted. These images (7.5 mm; skip = 15 mm) were then sent--without identifying information--to the original reviewers. From 1 to 3.5 years had elapsed since the original interpretations. The results of the new interpretations were compared with the original CT venography consensus interpretations of PIOPED II. RESULTS: There was agreement for the presence of DVT in at least one leg (same leg) or for the absence of DVT in both legs in 133 of the 150 study patients (89%). The kappa statistic showed substantial agreement between the consensus interpretations and the test interpretations (kappa = 0.75; 95% CI = 0.64-0.86) per patient. CONCLUSION: There was good--but not perfect--agreement between continuous helical and discontinuous axial imaging for the detection of DVT. Given the vagaries of interobserver and intraobserver variation, there appears to be little difference between the two approaches. Adopting discontinuous imaging and other dose-reduction strategies can reduce pelvic radiation by more than 75%. |
| | |
Authors:
|
Lawrence R Goodman; Paul D Stein; Afzal Beemath; H Dirk Sostman; Thomas W Wakefield; Pamela K Woodard; David F Yankelevitz |
Related Documents
:
|
7717248 - Reconstructed helical ct scans: improvement in z-axis resolution compared with overlapp... 22120578 - Pediatric mr elastography of hepatic fibrosis: principles, technique and early clinical... 22124778 - Multiphase contrast-enhanced ct with highly concentrated contrast agent can be used for... 21924408 - Bladder cancer: evaluation of staging accuracy using dynamic mri. 6713758 - A comparison between whole body scans made at two hours and three hours after intraveno... 19856448 - Development and application of magnetic resonance elastography of the normal and pathol... |
Publication Detail:
|
Type: Journal Article; Multicenter Study; Research Support, N.I.H., Extramural |
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: 409-12 Citation Subset: AIM; IM |
Affiliation:
|
Department of Radiology, Medical College of Wisconsin, 9200 W Wisconsin Ave., Milwaukee, WI 53226-3596, USA. lgoodman@mcw.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Female Humans Leg / blood supply Male Phlebography / methods* Prospective Studies Pulmonary Embolism / etiology, radiography* Radiation Dosage Radiographic Image Interpretation, Computer-Assisted* Tomography, Spiral Computed* Vena Cava, Inferior Venous Thrombosis / complications, radiography* |
| Grant Support | |
ID/Acronym/Agency:
|
HL063932/HL/NHLBI NIH HHS; HL63899/HL/NHLBI NIH HHS; HL63928/HL/NHLBI NIH HHS; HL63931/HL/NHLBI NIH HHS; HL63940/HL/NHLBI NIH HHS; HL63941/HL/NHLBI NIH HHS; HL63942/HL/NHLBI NIH HHS; HL63981/HL/NHLBI NIH HHS; HL63982/HL/NHLBI NIH HHS; HL67453/HL/NHLBI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Postoperative lung function in lung cancer patients: comparative analysis of predictive capability o...
Next Document: Cardiac CT angiography after coronary bypass surgery: prevalence of incidental findings.