Pelvimetría por resonancia magnética / Magnetic resonance imaging pelvimetry

Objetivos: Mostrar la utilidad de la pelvimetría por resonancia magnética (RM) en la valoración de las desproporciones pélvico-fetales. Material y métodos: Se ha realizado una pelvimetría por RM a 29 pacientes entre las semanas 36 y 38 de gestación, utilizando un equipo 1T y bobina phased-array con secuencias T1 en los planos sagital y axial oblicuo. Resultados: Se han calculado los diámetros pélvicos según el modelo adaptado en nuestra institución para las radiopelvimetrías, identificando los puntos anatómicos de referencia necesarios para su cálculo y recurriendo a la suma de imágenes cuando éstos se hallaban en planos distintos. Los resultados son superponibles a los de la radiopelvimetría, a excepción del cálculo del ángulo sacro, dada la diferente colocación de la paciente en ambas pruebas. Conclusión: La RM es una técnica útil para la realización de pelvimetrías, ya que permite la medición de los diámetros de la pelvis de forma rápida y directa, evitando el uso de radiaciones ionizantes

Objectives: To describe the usefulness of magnetic resonance imaging (MRI) pelvimetry in the evaluation of fetal-pelvic disproportion. Material and methods: MRI pelvimetry was performed in 29 women at 36-38 weeks' gestation in a 1T system and a phased-array coil, in the sagittal and oblique axial planes. Results: Pelvic diameters were calculated according to the modified parameters at our institution. The anatomic reference points were identified and images were added when these points were in different planes. The results were similar to those of radiopelvimetry except for the sacral angle, because of the different positioning of the patient in the 2 techniques. Conclusion: MRI is a useful technique for the performance of pelvimetry because it allows pelvic diameters to be measured quickly and directly without the use of ionizing radiation

Diagnostic value of hysterosalpingography in the detection of intrauterine abnormalities: a comparison with hysteroscopy.

OBJECTIVE: The purpose of this study was to evaluate the diagnostic accuracy of hysterosalpingography (HSG) in comparison with hysteroscopy in the detection of intrauterine abnormality in infertile patients. MATERIALS AND METHODS: Seventy-eight patients being investigated for infertility and undergoing HSG and hysteroscopy were studied retrospectively. Radiologic findings on HSG, including single or multiple filling defects and uterine wall irregularities, were evaluated and compared with hysteroscopic findings, which were considered the reference standard. RESULTS: HSG showed a sensitivity of 81.2% compared with that of hysteroscopy and a specificity of 80.4%, with a positive predictive value of 63.4% and a negative predictive value of 83.7%. HSG also had a false-negative rate of 90% and a false-positive rate of 21.8%. Overall agreement between the two procedures was 73%. CONCLUSION: HSG is still a useful screening test for the evaluation of the uterine cavity in the study of primary or secondary infertility. In addition, HSG provides information concerning the assessment of tubal morphology and patency. We believe that these two procedures are complementary in the evaluation of the uterine cavity.