One of the problems in ultrasound surgery is the long treatment times when large tumour volumes are sonicated. Large tumours are usually treated by scanning the tumour volume using a sequence of individual focus points. During the scanning, it is possible that surrounding healthy tissue suffers from undesired temperature rise. The selection of the scanning path so that the tumour volume is trea...

patients, and in these the risk of imbalance is much greater. How should imbalance be dealt with? The crucial question is whether the variable in question is related to the outcome being studied. If, for example, one treatment group is on average five years older than the other this will be of varying importance for outcomes such as survival time, reduction in blood pressure, or response to tre...

BACKGROUND Evaluation of thyroglossal duct cysts before surgical excision traditionally includes hormonal evaluation, ultrasound of the neck, and thyroid scanning. OBJECTIVE To evaluate the need for thyroid scanning in cases of thyroglossal duct cysts scheduled for operation. METHODS A retrospective chart review of 100 cases of thyroglossal duct cyst between 1988 and 1995 was carried out. ...

Background and Purpose—Real-time compound ultrasound imaging is a new technique for improving the image quality of B-mode scanning. We investigated the value of this method for the characterization of atherosclerotic plaques in the internal carotid artery. Methods—Thirty-two patients (22 men, 10 women; mean age, 75 years) with plaques of the internal carotid artery as identified by high-resolut...

Osteoporosis is the most common metabolic disease with significant impact on the morbidity and mortality of affected patients. Osteoporosis has a significant impact on the economy worldwide. The aim of this study was to find out whether heel ultrasound is as good as central bone densitometry scanning in diagnosing osteoporosis in patients who are at high risk of osteoporosis. This was a prospec...