The Z technique: an easy approach to the display of the mid-coronal plane of the uterus in volume sonography.
OBJECTIVE
The purpose of our study was to evaluate the ease of learning and clinical applicability of a technique (Z technique) for display of the mid-coronal plane of the uterus in volume sonography.


METHODS
Eight physicians were randomly assigned to 2 groups, A and B, after being instructed on the basic principles of post processing of sonographic volumes. Physicians in group A were asked to individually display the mid-coronal plane of the uterus in each of five 3-dimensional volumes of uteri. Physicians in group B were instructed on the Z technique and were then asked to individually display the mid-coronal plane of the uterus in the same volumes as group A. The time needed for display of the mid-coronal plane of the uterus and the quality of the mid-coronal plane image retrieved were recorded for each volume.


RESULTS
The mean time required to display the mid-coronal plane of the uterus for all volumes was 47.7 seconds in group B compared with 110.7 seconds in group A (P=.002). Furthermore, a significant improvement in time performance was seen for physicians in group A after learning the Z technique (23.2 seconds after compared with 110.7 seconds before; P=.0001). The quality of the image produced was notably better for all physicians after learning the Z technique.


CONCLUSIONS
The Z technique is an easy technique to learn. Physicians who learn this technique are able to retrieve the mid-coronal plane of the uterus faster and improve its image quality in volume sonography.
Abuhamad
Alfred Z
AZ
Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, VA 23507, USA. abuhamaz@evms.edu
Singleton
Stephanie
S
Zhao
Yueqin
Y
Bocca
Silvina
S
D003196:Computer Graphics; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D015588:Observer Variation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012984:Software; D013647:Task Performance and Analysis; D014463:Ultrasonography / Q000379:methods*; D014584:User-Computer Interface; D014599:Uterus / Q000000981:diagnostic imaging*