A new tilt on pelvic radiographs: a pilot study.

AIM: The aim of this study was to evaluate pelvic tilt on commonly performed measurements on radiography in primary protrusio acetabuli and developmental dysplasia of the hip. MATERIALS AND METHODS: A dry assembled pelvis and spine skeleton was positioned in an isocentric skull unit and films exposed with increasing degrees of angulation of pelvic tilt. The films were then read by two independent readers for seven different measurements used to evaluate the hips and acetabular: acetabular line to ilioischial line, teardrop appearance, intercristal/intertuberous ratio, co-ordinates of femoral head, centre edge angle, acetabular depth/width ratio and acetabular angle. RESULTS: There was so much variation in the protrusio results that no formal recommendation of any standard radiographic test can be given. Only the inter tuberous distance is not effected by pelvic tilt. The acetabular angles for developmental dysplasia of the hip showed the most potential with pelvic tilt below 15 degrees. CONCLUSION: As pelvic tilt increases, measurements used in protusio become unreliable, and computed tomography/magnetic resonance imaging are probably going to be more accurate as one can directly visualise pelvic intrusion. We recommend a lateral view to assess the degree of pelvic tilt in patients with protrusion to ensure these measurements are valid.

A comparison of the performance of role-play and non-role-play students at interview.

This article compares the performance of role-play and non-role-play students at an interview resembling a viva voce examination. Diagnostic and therapy radiography students were given a mock viva voce examination at which they were asked how they would respond to patients showing emotional difficulties during a radiographic procedure. Voce questions showed that students who had experienced role-play during training were more likely to cope with the patient's difficulties. The results of this survey are believed to indicate the value of role-play in radiography student training and to corroborate the use of the viva voce examination for assessing aspects of the affective domain.