Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
AJR Am J Roentgenol. 2004 Jul;183(1):223-8.

Evaluation of small (</= 3 cm) renal masses with MDCT: benefits of thin overlapping reconstructions.

Author information

  • 1Department of Radiology, Brigham and Women's Hospital, 75 Francis St., Boston, MA 02115, USA. jinzaki@sc.itc.keio.ac.jp

Abstract

OBJECTIVE:

Our purpose was to determine whether thin overlapping reconstructions using MDCT improve the detection and characterization of small renal masses.

MATERIALS AND METHODS:

Thirty-seven patients were scanned with MDCT using 2.5-mm collimation. Nephrographic phase data were reconstructed in two ways: a standard protocol (5-mm section thickness, no overlap) and an experimental protocol (3-mm section thickness, 50% overlap). Masses were detected and classified into three groups: group 1, measuring less than 20 H on both protocols (classified as cysts on both); group 2, measuring 20 H or greater on standard protocol and less than 20 H on experimental protocol (classified as cysts using experimental protocol only); and group 3, measuring 20 H or greater on both protocols (not classified as cysts using either protocol). Masses 10 mm or larger in group 3 were evaluated further for enhancement. Statistically significant differences between protocols were assessed using an analysis of counts and proportions.

RESULTS:

Of 175 detected lesions, 29 (17%) were detected only with the experimental protocol; all but one were smaller than 5 mm. Using the experimental protocol, of 45 masses between 5 and 10 mm, the number of masses that could be characterized as cysts increased from 13 (29%) to 38 (84%). The overall number of indeterminate lesions was reduced from 101 (69%) of 146 lesions detected with the standard protocol to 86 (53%) of 161 lesions detected with the experimental protocol.

CONCLUSION:

Using MDCT and thin overlapping reconstructions, renal cysts as small as 5 mm can be diagnosed with more confidence than is possible with standard reconstructions, and the overall number of indeterminate renal masses is reduced.

PMID:
15208143
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Atypon
    Loading ...
    Write to the Help Desk