HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Keller, T. M. Articles by Kubik-Huch, R. A. Search for Related Content PubMed PubMed Citation Articles by Keller, T. M. Articles by Kubik-Huch, R. A.

Obstetric MR Pelvimetry: Reference Values and Evaluation of Inter- and Intraobserver Error and Intraindividual Variability¹

¹ From the Institute of Diagnostic Radiology (T.M.K., S.C.A.M., G.E., K.T., B.M., R.A.K.H.) and Department of Obstetrics (A.R., R.H.), University Hospital, Zurich, Switzerland; and Department of Biostatistics, University of Zurich, Switzerland (B.S.). Received October 10, 2001; revision requested December 20; final revision received August 22, 2002; accepted August 27. Supported in part by a grant from the EMDO-Foundation, Switzerland. Address correspondence to R.A.K.H., Department of Radiology, Kantonsspital Baden, CH-5404 Baden, Switzerland (e-mail: rahel.kubik@ksb.ch).

View larger version (146K): [in a new window]   Figure 1a. T1-weighted spin-echo MR pelvimetric images (300/8, 7-mm section thickness, no section gap) obtained in a patient who underwent cesarean section for extremely small pelvic dimensions. (a) Midsagittal section shows the obstetric conjugate of 8.9 cm and sagittal outlet of 7.6 cm. Transverse sections show (b) the interspinous distance of 8.4 cm, measured at the level of the foveae of the femoral heads (arrows), and (c) the intertuberous distance of 8.3 cm. (d) Oblique section shows the transverse diameter of 10.8 cm.

View larger version (156K): [in a new window]   Figure 1b. T1-weighted spin-echo MR pelvimetric images (300/8, 7-mm section thickness, no section gap) obtained in a patient who underwent cesarean section for extremely small pelvic dimensions. (a) Midsagittal section shows the obstetric conjugate of 8.9 cm and sagittal outlet of 7.6 cm. Transverse sections show (b) the interspinous distance of 8.4 cm, measured at the level of the foveae of the femoral heads (arrows), and (c) the intertuberous distance of 8.3 cm. (d) Oblique section shows the transverse diameter of 10.8 cm.

View larger version (156K): [in a new window]   Figure 1c. T1-weighted spin-echo MR pelvimetric images (300/8, 7-mm section thickness, no section gap) obtained in a patient who underwent cesarean section for extremely small pelvic dimensions. (a) Midsagittal section shows the obstetric conjugate of 8.9 cm and sagittal outlet of 7.6 cm. Transverse sections show (b) the interspinous distance of 8.4 cm, measured at the level of the foveae of the femoral heads (arrows), and (c) the intertuberous distance of 8.3 cm. (d) Oblique section shows the transverse diameter of 10.8 cm.

View larger version (157K): [in a new window]   Figure 1d. T1-weighted spin-echo MR pelvimetric images (300/8, 7-mm section thickness, no section gap) obtained in a patient who underwent cesarean section for extremely small pelvic dimensions. (a) Midsagittal section shows the obstetric conjugate of 8.9 cm and sagittal outlet of 7.6 cm. Transverse sections show (b) the interspinous distance of 8.4 cm, measured at the level of the foveae of the femoral heads (arrows), and (c) the intertuberous distance of 8.3 cm. (d) Oblique section shows the transverse diameter of 10.8 cm.

View larger version (27K): [in a new window]   Figure 2. Bar graph shows intra- and interobserver error and intraindividual variability in the volunteer study. Reliabilities, subtracted from 1, represent the fraction of the variance influenced by inter- and intraobserver error and intraindividual variability. Interobserver error generally had the greatest influence, followed by intraobserver error. Intertuberous distance and sagittal outlet show the greatest deviances. ISD = interspinous distance, ITD = intertuberous distance, OC = obstetric conjugate, SO = sagittal outlet, TD = transverse diameter.

View larger version (20K): [in a new window]   Figure 3a. Line graphs show mean observer pelvimetric parameters in the volunteer study. Each line with a symbol represents an observer. As the (a) obstetric conjugate, (b) interspinous distance, and (c) transverse diameter are associated with relatively low interobserver error, curve profiles and absolute values are similar in the corresponding cell line charts. (d) Intertuberous distance curves are also similar in profile, but two to three observers found consistently higher values than others. (e) Sagittal outlet curves, on the other hand, show discordant profiles.

View larger version (25K): [in a new window]   Figure 3b. Line graphs show mean observer pelvimetric parameters in the volunteer study. Each line with a symbol represents an observer. As the (a) obstetric conjugate, (b) interspinous distance, and (c) transverse diameter are associated with relatively low interobserver error, curve profiles and absolute values are similar in the corresponding cell line charts. (d) Intertuberous distance curves are also similar in profile, but two to three observers found consistently higher values than others. (e) Sagittal outlet curves, on the other hand, show discordant profiles.

View larger version (23K): [in a new window]   Figure 3c. Line graphs show mean observer pelvimetric parameters in the volunteer study. Each line with a symbol represents an observer. As the (a) obstetric conjugate, (b) interspinous distance, and (c) transverse diameter are associated with relatively low interobserver error, curve profiles and absolute values are similar in the corresponding cell line charts. (d) Intertuberous distance curves are also similar in profile, but two to three observers found consistently higher values than others. (e) Sagittal outlet curves, on the other hand, show discordant profiles.

View larger version (27K): [in a new window]   Figure 3d. Line graphs show mean observer pelvimetric parameters in the volunteer study. Each line with a symbol represents an observer. As the (a) obstetric conjugate, (b) interspinous distance, and (c) transverse diameter are associated with relatively low interobserver error, curve profiles and absolute values are similar in the corresponding cell line charts. (d) Intertuberous distance curves are also similar in profile, but two to three observers found consistently higher values than others. (e) Sagittal outlet curves, on the other hand, show discordant profiles.

View larger version (24K): [in a new window]   Figure 3e. Line graphs show mean observer pelvimetric parameters in the volunteer study. Each line with a symbol represents an observer. As the (a) obstetric conjugate, (b) interspinous distance, and (c) transverse diameter are associated with relatively low interobserver error, curve profiles and absolute values are similar in the corresponding cell line charts. (d) Intertuberous distance curves are also similar in profile, but two to three observers found consistently higher values than others. (e) Sagittal outlet curves, on the other hand, show discordant profiles.