Автор: Grampp Название: Radiology of Osteoporosis.2003 ISBN: 3540668276 ISBN-13(EAN): 9783540668275 Издательство: Springer Цена: 12571.00 р. Наличие на складе: Невозможна поставка. Описание: This book provides a comprehensive overview of osteoporosis, the pathologic conditions that give rise to osteoporosis, and the complications that are frequently encountered. After initial chapters devoted to pathophysiology, the presentation of osteoporosis on conventional radiographs is illustrated and discussed. Thereafter, detailed consideration is given to each of the measurement methods employed to evaluate osteoporosis, including dual x-ray absorptiometry, vertebral morphometry, spinal and peripheral quantitative computed tomography, quantitative ultrasound, and magnetic resonance imaging. The role of densitometry in daily clinical practice is appraised. Finally, a collection of difficult cases involving pitfalls is presented, with guidance to their solution. The information contained in this volume will be invaluable to all with an interest in osteoporosis.
Описание: The term Vitamin D designates a group of closely related seco-steroids with antirachitic activity. The two most important members of these are ergocalciferol
(vitamin D2) and cholecalciferol (vitamin D3). About 80 per cent of the vitamin D supply in man is produced in the skin and only 20 per cent is provided by nutrition.
The first
analogue of Vitamin D, dihydrotachysterol, was developed in the 1930s and used in the treatment of primary or secondary hypoparathyroidism. It then took 40 years to learn that Vitamin
D was not the biologically active principle for healing bone disease. It has to be hydroxylated in the liver at position 25 to build 25-hydroxycholecalciferol and then finally in the kidney at
position 1a to become 1a, 25-dihydroxycholecalciferol [= 1a, 25-(OH)2-D3].
Further generations of Vitamin D analogues have since been developed. The most important of
these are the so-called D hormone 1a, 25-(OH)2-D3 (= calcitriol) and its analogue alfacalcidol (= 1a-OH-D3) which are highly effective drugs for the treatment of renal bone disease.
Further successful indications for active Vitamin D analogues include hypoparathyroidism and osteomalacia.
With regards osteoporosis, the role of an insufficient Vitamin D
supply or impairment in activation was underestimated for a long time. A breakthrough was achieved with studies showing that the prevalence of mild to moderate vitamin D deficiency
was very high and increasing with age.
Автор: Woolf Название: Osteoporosis ISBN: 1853172464 ISBN-13(EAN): 9781853172465 Издательство: Informa Рейтинг: Цена: 8896.00 р. Наличие на складе: Нет в наличии.
Описание: Retaining its emphasis on osteoporosis prevention, this text has been fully updated to include current information on bone biology and drug treatments, including bisphosphonates. Newer techniques such as the use of DXA for bone mineral measurements and MR and CT as diagnostic aids are discussed.
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