Seltzer S E, Judy P F, Adams D F, Jacobson F L, Stark P, Kikinis R, Swensson R G, Hooton S, Head B, Feldman U
Department of Radiology, Harvard Medical School, Brigham and Women's Hospital, Boston, MA 02115, USA.
Radiology. 1995 Oct;197(1):73-8. doi: 10.1148/radiology.197.1.7568857.
To determine radiologists' ability to find lung nodules on spiral computed tomographic (CT) scans of the chest with both rapid sequential (cine) and conventional film-based viewing.
Eight radiologists searched for lung nodules on spiral CT images (10-mm collimation, 10 mm/sec table speed) presented in two formats. Cine viewing was performed at a computer work-station; sections were viewed in 2-mm increments at frame rates up to 10 frames per second. Film-based viewing of images from a laser printer was performed with a lightbox; sections were viewed at 4-mm increments. Eight 3-5-mm-diameter simulated nodules were superimposed on each of five normal CT scans.
Radiologists found a higher fraction of nodules with the cine presentation than with film (mean, 0.69 +/- 0.02 [standard error] versus 0.58 +/- 0.03, respectively [P = .006]). Diameter thresholds for nodule detection (50% correctly localized) were 3.3 and 3.5 mm, respectively.
Cine viewing of spiral CT images of the chest improved radiologists' ability to detect nodules.
确定放射科医生在胸部螺旋计算机断层扫描（CT）图像上，通过快速连续（动态）和传统基于胶片的观察方式发现肺结节的能力。
八位放射科医生对以两种格式呈现的螺旋CT图像（准直10毫米，床速10毫米/秒）进行肺结节搜索。动态观察在计算机工作站进行；以每秒高达10帧的帧率，以2毫米的增量观察各层面。使用灯箱对激光打印机打印的图像进行基于胶片的观察；以4毫米的增量观察各层面。在五幅正常CT扫描图像上，每幅均叠加八个直径3 - 5毫米的模拟结节。
与基于胶片的观察方式相比，放射科医生通过动态观察方式发现的结节比例更高（平均分别为0.69 ± 0.02[标准误]和0.58 ± 0.03[P = .006]）。结节检测的直径阈值（50%正确定位）分别为3.3毫米和3.5毫米。
胸部螺旋CT图像的动态观察提高了放射科医生检测结节的能力。
