Selective internal pudendal angiography was performed in 195 men (average age, 35.4 years +/- 10.3) who were suspected of having arteriogenic impotence. In the majority of patients, disease was localized to the cavernosal arteries. A previous series that involved older patients had demonstrated significant disease in the hypogastric and internal pudendal arteries. When controlled for trauma, the data revealed no significant difference (X2 test, P greater than .10) in the distribution of hemodynamically significant penile arterial disease. However, in patients who had sustained major pelvic trauma, the common penile artery was frequently hemodynamically compromised. There is a great deal of variation in the origin of the internal pudendal artery. An accessory pudendal artery was demonstrated in 7% of the patients. If a selective internal pudendal artery injection fails to demonstrate the penile arterial anatomy, a less selective injection should be performed. Bilateral injections should always be performed, as unilateral arterial disease was present in 15% of the patients.

The cost-effectiveness of HACE for the treatment of CLM varies considerably according to the anticipated survival benefit. Results of future randomized controlled trials must demonstrate a survival benefit of nearly 5 months for HACE to meet the moderate cost-effectiveness standard of $50,000 per LY gained.

Although the most important component of an effective scientific exhibit is content, the way in which an exhibit is constructed can greatly influence its overall effectiveness. Choice of format should be determined by carefully analyzing the purpose of one's exhibit, expected audience, and data at hand, as well as type of meeting and funding. Depending on the type of data to be presented and available equipment and budget, the most appropriate style for a scientific exhibit may be a traditional mat board, computer-generated tiles or large-print backboard panel, traditional mat board with viewbox exhibit, matted transparency tiles with viewbox exhibit, or computer-generated large-film display. The authors analyzed 993 of 1, 041 (95.4%) scientific exhibits on display at the 84th RSNA Scientific Assembly and Annual Meeting and categorized each exhibit according to the following characteristics: display type and size, color scheme, display font size, and graphic styles. These characteristics were then correlated with scientific exhibit and design awards as well as invitations for submission to RadioGraphics. Chance of winning an award or being asked to publish the presentation in RadioGraphics was significantly increased for viewbox exhibits (compared with backboard panel exhibits) and for larger exhibits (compared with smaller exhibits).