Gridless adult cervical spine radiography and its' effect on image quality and radiation dose: A phantom study.

Introduction: Imaging of the cervical spine in general radiography is most frequently performed using an anti-scatter grid. The purpose of this study was to investigate the effects of a gridless setting on image quality and radiation dose during digital radiography of the anteroposterior (AP) and lateral (LAT) cervical spine.

Methods: A phantom study was performed with a variety of tube voltages (63-75 kV) with and without an anti-scatter grid.

Unraveling the genetic complexity of a cultivated breeding population of "yerba mate" (Ilex paraguariensis St. Hil.).

We report the first comprehensive multilocus molecular characterization of cultivated Ilex paraguariensis plants belonging to a breeding program. Using nuclear and homologous chloroplastidic molecular markers, we have genotyped 158 plants from four plantation sites. Analyses of the nuclear data (187 variable dominant loci) allowed detecting high diversity (0.

[Arterial hypertension in the elderly. Is there still room for diuretics?].

Hypertension (HTA), whether systolic and diastolic or as isolated systolic hypertension, has been firmly established as a major risk factor of morbidity and cardiovascular mortality in elderly patients. Despite recent controversies that have appeared in the literature on the metabolic disturbances caused by diuretics, especially hypokalemia, and the absence of a significant advantage on coronary mortality, these drugs should nevertheless be considered as extremely important in the treatment of HTA. Prescribed at small doses, their long-term effects are by far the best documented of all antihypertensive drugs.

The outcome of surgery for lumbar disc herniation. I. A 4-17 years' follow-up with emphasis on somatic aspects.

Records of 575 patients operated on for the first time for lumbar disc herniation have been reviewed. Four to 17 years after the operation 371 (65%) patients answered a questionnaire on number of reoperations, working capacity, lumbar or sciatic pain as well as necessity of treatment. Of these, 255 (70%) still complained of back pain, and 83 (23%) of this group complained of constant heavy pain; 172 patients (45%) have a residual sciatica; 131 (35%) are still under some kind of treatment; 47 (14%) patients are receiving a disability pension.