Sociodemographic factors of Pap smear screening in Taiwan

Substantial evidence exists that regular screening is effective in preventing cervical cancer. However, the existing services are underused by many women in Taiwan. To examine the effects of sociodemographic characteristics on the underuse of Papanicolaou (Pap) smear screening, from September to December 1993 we conducted a questionnaire interview on a sample of 4,400 women aged 20 years and older in Taipei city using multistage sampling with probability proportional to size. Our results indicate that 40% of the women sampled have never had a Pap smear and 86% have not had one in the past year. Age is the strongest factor affecting Pap smear use, particularly for women below age 30 and over the age of 65. In addition, women with lower levels of education, women who are not employed, never-married women who live outside the city tend to underuse Pap smear screening. These findings help indicate priority groups which should be targeted to increase screening and consequently reduce cervical cancer. Our data also provides a good baseline for comparison of rates of Pap smear screening by various sociodemographic factors in the future.     

Evaluation of distance-weighted SPECT reconstruction for skeletal scintigraphy

In 15 patients who had undergone skeletal scintigraphy for evaluation of low back pain, single-photon emission computed tomography (SPECT) reconstruction techniques of distance-weighted filtered backprojection (new method) and non-distance-weighted filtered backprojection (standard method) were compared. Mid-spine sagittal views differing only by reconstruction methods were evaluated by trained observers and by a quantitative profile technique. When asked to compare image quality, the observers demonstrated a clear preference for images reconstructed by the new method. Profile quantitation showed significantly greater contrast in more superficial structures with the new method.     

Evaluation of the grafted ascending aorta with computed tomography. Complications caused by suture dehiscence

Patients who have undergone surgery on the thoracic aorta and placement of a synthetic tubular graft need close, long-term radiological follow-up, as they are at risk of not only complications and progression of the underlying disease (atherosclerosis, dissection, or cystic medial necrosis) but also complications of the procedure, notably suture dehiscence leading to formation of an aneurysm around the graft. In a series of 14 asymptomatic postoperative patients studied by computed tomography (CT), the authors detected leakage of contrast material around the graft in 6 patients, 2 of whom required re-operation to correct suture dehiscence. CT is a noninvasive and sensitive method of postoperative evaluation of patients who have undergone an aortic graft.