【摘要】 作者对２３１例常规Ｘ线摄影难以确诊的病例行微焦点高千伏放大摄影（摄影焦点０．３ｍｍ、放大率２倍），并作对照研究。其中胸部１５２例，骨骼７９例；共３１１个部位，２６种病变。研究结果表明，本法在显示病变的微细结构方面明显优于常规片。该方法集微焦点、高千伏和放大摄影的技术优势于一体，可显著提高成像质量，提高人体生理视阈和肉眼的能见度，为Ｘ线诊断提供敏感而可靠的病理改变信息。并可减少病人的照射量，延长Ｘ线管寿命，提高设备效益，在Ｘ线诊断中有较高的应用价值。更多还原

【Abstract】 Radiography using microfocus high kV magnifying technique was performed on 231patients with obsc ure diagnosis after conventional radiography(foral size 0. 3mm magnifying factor ×2),and compared with controls. The study group included chest 152 cases, bone 79 cases covering 311locations,26 disease categories. The results showed that this technique by combining microfocus,highkV and magnification techniques possess obvious advantages over conventional radiography in demon-strating patho-anatomical details. Image quality,physiological visual threshold and detectability bynaked eye are all improved, thereby providing reliable and useful informations. Radiation dose is reducedand tube life can be prolonged. It is a convenient and useful technique in routine diagnostic work.更多还原