Clark L R, Jacobs N M, Zeman R K, Jaffe M H, Moser B E, Choyke P L, Paushter D M, Schiebler M L
Invest Radiol. 1985 Aug;20(5):531-8. doi: 10.1097/00004424-198508000-00016.
Computed tomography (CT) using a geometric magnification technique was found to improve spatial resolution in phantom studies when compared with conventional third-generation geometry images. The clinical feasibility of using geometric magnification, small focal spot size, and dynamic contrast enhancement was studied in 143 patients referred to CT for clinically suspected pancreatic disease. This population included 46 patients with a normal pancreas and 36 patients subsequently proven to have primary pancreatic carcinoma. Using this new technique in conjunction with dynamic contrast enhancement resulted in high quality pancreatic images. Despite the limitations in tube current associated with a small focal spot size and low total heat capacity of the system, clinical imaging was not adversely affected. Use of the geometric magnification technique is recommended in departments where it is technically feasible.
与传统第三代几何图像相比，采用几何放大技术的计算机断层扫描（CT）在体模研究中被发现可提高空间分辨率。对143例因临床怀疑患有胰腺疾病而接受CT检查的患者，研究了使用几何放大、小焦点尺寸和动态对比增强的临床可行性。该人群包括46例胰腺正常的患者和36例随后被证实患有原发性胰腺癌的患者。将这种新技术与动态对比增强相结合可获得高质量的胰腺图像。尽管与小焦点尺寸和系统低总热容量相关的管电流存在局限性，但临床成像并未受到不利影响。在技术可行的科室，建议使用几何放大技术。
